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Tait TM9100 Service Manual

Summary of TM9100

  • Page 1

    Tm9100 mobiles service manual mma-00017-01 issue 1 august 2005.

  • Page 2: Tait Contact Information

    2 tm9100 service manual © tait electronics limitedaugust 2005 tait contact information tait radio communications corporate head office tait electronics ltd p.O. Box 1645 christchurch new zealand for the address and telephone number of regional offices, refer to the taitworld website: website: http:/...

  • Page 3: Contents

    Tm9100 service manual 3 © tait electronics limited august 2005 contents preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 scope of manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 hardware and s...

  • Page 4

    4 tm9100 service manual © tait electronics limited august 2005.

  • Page 5: Preface

    Tm9100 service manual 5 © tait electronics limited august 2005 preface scope of manual this manual contains information to service technicians for carrying out level-1 and level-2 repairs of tm9100 radios and accessories. Level-1 repairs entail the replacement of faulty parts and circuit boards; lev...

  • Page 6: Copyright

    6 tm9100 service manual © tait electronics limited august 2005 copyright all information contained in this manual is the property of tait electronics ltd. All rights are reserved. This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, stored, or reduced to any elec...

  • Page 7: Publication Record

    Tm9100 service manual 7 © tait electronics limited august 2005 publication record alert notices within this manual, four types of alerts are given to the reader: warning, caution, important and note. The following paragraphs illustrate each type of alert and its associated symbol. Warning!! This ale...

  • Page 8

    8 tm9100 service manual © tait electronics limited august 2005 cso customer service organisation ctcss continuous-tone-controlled subaudible signaling dac digital-to-analog converter dc direct current dsp digital signal processor dtmf dual-tone multi-frequency eptt external ptt (press-to-talk) esd e...

  • Page 9

    Tm9100 service manual 9 © tait electronics limited august 2005 psu power supply unit ptt press-to-talk risc reduced instruction set computing rssi received signal strength indication sfe software feature enabler sma sub miniature version a smd surface-mount device smt surface-mount technology smps s...

  • Page 10

    10 tm9100 service manual © tait electronics limited august 2005.

  • Page 11

    Tm9100 service manual 11 © tait electronics limitedaugust 2005 tm9100mobiles chapter 1 description of the radio.

  • Page 12: Chapter 1 – Contents

    12 tm9100 service manual © tait electronics limitedaugust 2005 chapter 1 – contents 1 introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.1 frequency bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.2 rf ...

  • Page 13: Introduction

    Tm9100 service manual introduction 13 © tait electronics limitedaugust 2005 1 introduction the tm9100 series is a range of high-performance microprocessor- controlled radios for digital (apco project 25-compatible), analog and mixed operation for voice and data communication. The radios are designed...

  • Page 14: 1.1

    14 introduction tm9100 service manual © tait electronics limitedaugust 2005 this section also gives an overview of the labels on the product and the specifications. 1.1 frequency bands the radios are available in the following frequency bands: ■ 136 to 174mhz (b1) ■ 400 to 470mhz (h5) ■ 450 to 530mh...

  • Page 15: 1.3

    Tm9100 service manual introduction 15 © tait electronics limitedaugust 2005 1.3 accessories tait offers a large variety of audio accessories, installation kits, internal options boards and other accessories such as a desktop power supply. For more information on these accessories refer to “chapter 3...

  • Page 16: 1.4

    16 introduction tm9100 service manual © tait electronics limitedaugust 2005 1.4 product codes this section describes the product codes used to identify products of the tm9100 mobile radio product line. General the product codes of the tm9100 mobile radio product line have the format: tmaabc–ddee whe...

  • Page 17: 1.5

    Tm9100 service manual introduction 17 © tait electronics limitedaugust 2005 1.5 labels four external labels are attached to the bottom of the radio body: ■ compliance information ■ serial number and product code ■ hot surface safety warning ■ rf exposure safety warning figure 1.2 labels of the tm910...

  • Page 18: 1.6

    18 introduction tm9100 service manual © tait electronics limitedaugust 2005 1.6 specifications introduction table 1.1 shows the specifications for the tm9100 radios. The parameter values quoted are minimum values. These specifications are valid for the date of publication only. For up-to-date specif...

  • Page 19

    Tm9100 service manual introduction 19 © tait electronics limitedaugust 2005 environmental conditions operating temperatures −22°f to +140°f (−30°c to +60°c) standards • ip54 • mil-std 810c, d, e and f (for details contact technical support) meets the requirements for sealing against: • dust • rain m...

  • Page 20

    20 introduction tm9100 service manual © tait electronics limitedaugust 2005 transmitter 50w/40w radio: 25w radio: output power: • level 1 (very low) • level 2 (low) • level 3 (medium) • level 4 (high) 10w 15w 25w (vhf), 20w (uhf) 50w (vhf), 40w (uhf) 1w 5w 12w 25w modulation limiting: • 25khz/30khz ...

  • Page 21

    Tm9100 service manual introduction 21 © tait electronics limitedaugust 2005 table 1.2 typical current consumptions by radio while not transmitting (analog mode) and by control head parameter value radio not operating: • radio off (no links fitted) • radio off (links lk1, lk2, lk3 fitted) (using igni...

  • Page 22

    22 introduction tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 23: Description

    Tm9100 service manual description 23 © tait electronics limitedaugust 2005 2 description this section describes the mechanical design and architecture of the radio, explains the operation of the transceiver and the control head, and gives pinouts of the radio connectors. 2.1 mechanical design overvi...

  • Page 24

    24 description tm9100 service manual © tait electronics limitedaugust 2005 2.1.1 radio body overview the radio body consists of the following main components (see figure 2.2 on page 25 ): ■ cover b ■ lid d ■ internal options board (optional) ■ chassis g ■ main-board assembly f cover the black plasti...

  • Page 25

    Tm9100 service manual description 25 © tait electronics limitedaugust 2005 figure 2.2 components of the radio body b cover g chassis c screw m4x16 (x4) h auxiliary connector bung d lid assembly i screws m4x16 (x2) e screw m3x10 (x5) j seal f main-board assembly 1) gap pad (50w/40w radio only) b c x4...

  • Page 26

    26 description tm9100 service manual © tait electronics limitedaugust 2005 the front of the chassis has an aperture for the control-head connector. The control-head seal is fitted inside a groove around the flange at the front face of the chassis and provides for ip54 class protection when the contr...

  • Page 27

    Tm9100 service manual description 27 © tait electronics limitedaugust 2005 main-board assembly the main-board assembly consists of the following components (see figure 2.3 ): ■ main board 1^ with smt components, digital board d , shielding cans, and connectors ■ heat-transfer block h ■ mounting and ...

  • Page 28

    28 description tm9100 service manual © tait electronics limitedaugust 2005 the main board 1^ is attached to the heat-transfer block h with three m3x10 torx-head screws b and the fastening elements j , 1# and 1$ of the auxiliary and rf connectors. The inner foam d-range seal g seals the auxiliary con...

  • Page 29

    Tm9100 service manual description 29 © tait electronics limitedaugust 2005 2.1.2 control head overview the control head can be divided into the following main areas: ■ front panel with control elements, indicators, lcd, speaker, and concealed microphone ■ space-frame and seals ■ control-head board w...

  • Page 30

    30 description tm9100 service manual © tait electronics limitedaugust 2005 speaker the speaker 1! Sits inside a round recess of the front panel assembly, where a cloth membrane is fixed to the speaker grille. The speaker clamp 1) holds the speaker in position. The speaker cable plugs into the speake...

  • Page 31

    Tm9100 service manual description 31 © tait electronics limitedaugust 2005 figure 2.4 components of the control head b m4 x 12 taptite screw (x2) c adapter flange d control-head loom assembly with female-female adapter e 3 x 10 pt screw (x4) f control-head board g space-frame seal (x2) h short light...

  • Page 32

    32 description tm9100 service manual © tait electronics limitedaugust 2005 control-head board the control-head board f is a printed circuit board in smt design with components on the top and bottom sides. Some smt components are shielded by metal cans. The control-head board is fitted to the front p...

  • Page 33: 2.2

    Tm9100 service manual description 33 © tait electronics limitedaugust 2005 2.2 user interface figure 2.6 shows the controls and indicators of the user interface. For more information refer to the tm9100 user’s guide. Some keys have functions assigned to both short and long key presses. A short key p...

  • Page 34: 2.3

    34 description tm9100 service manual © tait electronics limitedaugust 2005 2.3 connectors overview this section describes the specifications and pinouts of the connectors of the radio body and the control head. Figure 2.7 provides an overview of the connectors: figure 2.8 shows the connectors of the...

  • Page 35

    Tm9100 service manual description 35 © tait electronics limitedaugust 2005 figure 2.8 connectors of the radio body (25w radio) control-head connector provision for external options connector provision for additional connector power connector auxiliary connector rf connector internal options connecto...

  • Page 36

    36 description tm9100 service manual © tait electronics limitedaugust 2005 2.3.1 rf connector the rf connector is the primary rf interface to the antenna. The rf connector is a standard mini-uhf connector or a bnc connector with an impedance of 50Ω. Important the maximum rf input level is +27dbm. Hi...

  • Page 37

    Tm9100 service manual description 37 © tait electronics limitedaugust 2005 2.3.2 power connector the power connector is the interface for the primary 13.8v power source and the external speaker. The primary power source can be the vehicle battery or a mains-fed dc power supply. There are different p...

  • Page 38

    38 description tm9100 service manual © tait electronics limitedaugust 2005 2.3.3 auxiliary connector the auxiliary connector is the standard interface for external devices that are typically connected to a radio. The auxiliary connector is a 15-way standard-density d-range socket. The auxiliary conn...

  • Page 39

    Tm9100 service manual description 39 © tait electronics limitedaugust 2005 2.3.4 internal options connector when installing an internal options board, the internal options connector is the electrical interface to the main board of the radio body. The internal options connector provides similar i/o t...

  • Page 40

    40 description tm9100 service manual © tait electronics limitedaugust 2005 2.3.6 control-head connectors the control-head loom connects the connector on the front of the radio body to the connector on the rear of the control head. The connector on the front of the radio body is an 18-way two-row rig...

  • Page 41

    Tm9100 service manual description 41 © tait electronics limitedaugust 2005 2.3.7 microphone connector the microphone connector of the control head is an rj45 socket. When the control head is connected to the control-head connector of the radio body using the loom provided, the microphone connector u...

  • Page 42: 2.4

    42 description tm9100 service manual © tait electronics limitedaugust 2005 2.4 hardware and software architecture overview this section describes the hardware and software modules of the radio and their interaction in the functioning of the radio. 2.4.1 hardware architecture the electrical hardware ...

  • Page 43

    Tm9100 service manual description 43 © tait electronics limitedaugust 2005 figure 2.10 hardware architecture of the main board power supply receiver tr ansmitter frequency synthesizer dsp codec and audio interface digital boar d rf connector po w er connector control-head connector lpf 1) pin switch...

  • Page 44

    44 description tm9100 service manual © tait electronics limitedaugust 2005 2.4.2 software architecture overview software plays an important role in the functioning of the radio. Some radio functions such as the graphical user interface, processing of the analog and digital signals, and the implement...

  • Page 45

    Tm9100 service manual description 45 © tait electronics limitedaugust 2005 software start-up when the radio is turned on, the following processes are carried out on the main board: note this process describes the normal software start-up into normal radio operation mode. 1. The fpga image, which inc...

  • Page 46

    46 description tm9100 service manual © tait electronics limitedaugust 2005 when the radio is turned on, the following processes are carried out on the control-head board: 1. The fpga image, which includes the risc processor, is loaded from the serial flash to the fpga. 2. The risc processor executes...

  • Page 47: 2.5

    Tm9100 service manual description 47 © tait electronics limitedaugust 2005 2.5 operation in receive mode overview this section describes the functioning of the transceiver in receive mode. The operation of the transceiver is illustrated in figure 2.12 on page 48 (analog mode) and figure 2.13 on page...

  • Page 48

    48 description tm9100 service manual © tait electronics limitedaugust 2005 figure 2.12 transceiver operation in analog mode digital down- converter squelch fr ont end 1st if channel lpf rssi second lo uhf: 90.328 mhz vhf: 42.928 mhz fm demod quad demod rx ag c audio filtering de- emphasis optional p...

  • Page 49

    Tm9100 service manual description 49 © tait electronics limitedaugust 2005 figure 2.13 transceiver operation in digital mode if: uhf: 45.1 mhz vhf: 21.4 mhz digital down- converter front end 1st if channel lpf second lo uhf: 90.328 mhz vhf: 42.928 mhz quad demod rx ag c 2nd if: 64 khz audio pa phase...

  • Page 50

    50 description tm9100 service manual © tait electronics limitedaugust 2005 2.5.1 rf hardware pin switch the rf pin switch circuitry selects the rf path to and from the antenna to either the tx or rx circuitry of the radio. In addition to the switching functionality, the pin switch is used to provide...

  • Page 51

    Tm9100 service manual description 51 © tait electronics limitedaugust 2005 2.5.2 digital baseband processing custom logic the remainder of the receiver processing up to demodulation is performed by custom logic. The digitized quadrature signal from the rf hardware is digitally down-converted to a ze...

  • Page 52

    52 description tm9100 service manual © tait electronics limitedaugust 2005 2.5.3 audio processing and signaling audio processing (analog mode) raw demodulated data from the receiver is processed within the dsp. The sample rate at this point is 48khz with signal bandwidth limited only by the if filte...

  • Page 53

    Tm9100 service manual description 53 © tait electronics limitedaugust 2005 rx vocoder (digital mode) the 88 bits from the fec are decoded to generate the fundamental frequency of the frame, the voiced/unvoiced decisions for each frequency band, and the spectral amplitudes. 20ms of speech is synthesi...

  • Page 54: 2.6

    54 description tm9100 service manual © tait electronics limitedaugust 2005 2.6 operation in transmit mode overview this section describes the functioning of the transceiver in transmit mode. The operation of the transceiver is illustrated in figure 2.12 on page 48 (analog mode) and figure 2.13 on pa...

  • Page 55

    Tm9100 service manual description 55 © tait electronics limitedaugust 2005 2.6.1 audio processing and signaling microphone input the input to the transmitter path begins at the microphone input. There are two microphone sources: a fist microphone connected to the control head and an auxiliary microp...

  • Page 56

    56 description tm9100 service manual © tait electronics limitedaugust 2005 tx vocoder fec (digital mode) the 88 bits from the vocoder have 56 bits of parity added to them. Different amounts of protection are afforded to the vocoder parameters, depending on their relative importance. Four blocks of 1...

  • Page 57

    Tm9100 service manual description 57 © tait electronics limitedaugust 2005 2.6.2 frequency synthesizer introduction as shown in figure 2.12 , the frequency synthesizer consists of two main parts: ■ fcl ■ rf pll, comprising rf pll device, loop filter, vco, and vco output switch frequency control loop...

  • Page 58

    58 description tm9100 service manual © tait electronics limitedaugust 2005 the fcl generates an output of 13.012mhz±4khz. Initially, a voltage controlled crystal oscillator (vcxo) produces a quasi-regulated frequency in the required range. The vcxo output is fed to a mixer where it is mixed with the...

  • Page 59

    Tm9100 service manual description 59 © tait electronics limitedaugust 2005 frequency acquisition of rf pll in the rf pll the loop bandwidth is initially set to high by increasing the charge-pump current and reducing time constants in the loop filter. As a result, settling to within 1khz of the final...

  • Page 60

    60 description tm9100 service manual © tait electronics limitedaugust 2005 power control the steady-state power output of the transmitter is regulated using a hardware control loop. With the 50w/40 w radio, the sum of the forward power output from the rf power amplifier and reverse power reflected f...

  • Page 61

    Tm9100 service manual description 61 © tait electronics limitedaugust 2005 memory that is played back at the correct rate to the dac to produce the desired waveform. The ramp-up and ramp-down waveforms are produced by playing back the look-up table in forward and reverse order respectively. For a gi...

  • Page 62

    62 description tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 63: Circuit Descriptions

    Tm9100 service manual circuit descriptions 63 © tait electronics limitedaugust 2005 3 circuit descriptions introduction this section describes and illustrates the circuitry of the main board and the control-head board. The main board is decided into the following circuitry modules: ■ transmitter ■ r...

  • Page 64

    64 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 figure 3.1 main board hardware architecture power supply receiver tr ansmitter frequency synthesizer dsp codec and audio interface digital boar d rf connector po w er connector control-head connector lpf 1) pin switc...

  • Page 65: 3.1

    Tm9100 service manual circuit descriptions 65 © tait electronics limitedaugust 2005 3.1 transmitter circuitry introduction for a block diagram of the transmitter circuitry, refer to figure 3.2 . The transmitter circuitry is different for the 50 w/40 w radios and the 25w radios, and the different ban...

  • Page 66

    66 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 figure 3.2 block diagram of the transmitter circuitry rf connector receiver lpf directional coupler pa fo rw ard p ower buffer amplifier power control pin switch driver exciter bias limiter shaper and level shifter s...

  • Page 67

    Tm9100 service manual circuit descriptions 67 © tait electronics limitedaugust 2005 the loop maintains these power settings under changing environmental conditions. The control mechanism for this loop is via the dac ic204 and one of the operational amplifiers making up ic301. The power control loop ...

  • Page 68: 3.2

    68 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 3.2 receiver circuitry introduction for a block diagram of the receiver circuitry, refer to figure 3.3 . The receiver is of the triple-conversion superheterodyne type. The first two if stages are implemented in hardw...

  • Page 69

    Tm9100 service manual circuit descriptions 69 © tait electronics limitedaugust 2005 figure 3.3 block diagram of the receiver circuitry image filter lna image filter first if bpf 1 if amplifier first if bpf 2 quadr ature demodulator bias network power supply codec and audio digital boar d pll noise b...

  • Page 70

    70 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 demodulation demodulation takes place within the fpga. Demodulated audio is passed to the dsp of the digital board for processing of the receiver audio signal. Raw demodulated audio can be tapped out from the dsp for...

  • Page 71: 3.3

    Tm9100 service manual circuit descriptions 71 © tait electronics limitedaugust 2005 3.3 frequency synthesizer circuitry introduction for a block diagram of the frequency synthesizer circuitry, refer to figure 3.4 . The frequency synthesizer includes an active loop filter, one or two vcos and buffer ...

  • Page 72

    72 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 figure 3.4 block diagram of the frequency synthesizer circuitry coupler pll mod 5 v switch syn tx lo syn rx lo1 tr switch vco (vhf only) dig syn tr sw pll summer 5v vp suppl y loop filter vco supply filter +5 v dec v...

  • Page 73

    Tm9100 service manual circuit descriptions 73 © tait electronics limitedaugust 2005 reference frequency the 25 khz (approximate) reference is obtained by dividing the 13 mhz (approximate) output of the fcl. Any error in the fcl output frequency will be multiplied by the synthesizer. Therefore, if th...

  • Page 74

    74 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 speed-up techniques to reduce the change-over time between transmit and receive, part-time speed-up techniques have been implemented. Speed-up involves changing some resistor values while simultaneously changing the ...

  • Page 75: 3.4

    Tm9100 service manual circuit descriptions 75 © tait electronics limitedaugust 2005 3.4 frequency control loop introduction the fcl is included in the block diagram of the frequency synthesizer (see figure 3.4 ). The fcl forms part of the frequency-synthesizer module. The basis of the fcl is a vcxo,...

  • Page 76: 3.5

    76 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 3.5 codec and audio circuitry introduction for a block diagram of the codec and audio circuitry, refer to figure 3.5 . A/d and d/a conversion the analog-to-digital conversion and digital-to-analog conversion is perfo...

  • Page 77

    Tm9100 service manual circuit descriptions 77 © tait electronics limitedaugust 2005 figure 3.5 block diagram of the codec and audio circuitry da c codec 1 codec 2 level shifter 2v3 supply voltage divider buffer amplifier summer audio p a bias network lpf buffer amplifier codec and audio cdc rx vref ...

  • Page 78

    78 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 the sections of the circuitry concerned with these functions are described below. Audio signal for speaker the audio signal for the speaker is generated by ic204 ( voutauxp ball). This signal is post-volume-control a...

  • Page 79

    Tm9100 service manual circuit descriptions 79 © tait electronics limitedaugust 2005 auxiliary audio output the source for the auxiliary audio output signal cdc aud tap out is provided by ic204 ( rampdac ball). The dac output of ic204 is low-pass filtered to remove high-frequency artefacts. The low-p...

  • Page 80: 3.6

    80 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 3.6 power supply circuitry introduction for a block diagram of the power supply circuitry, refer to figure 3.6 . The power-supply circuitry consists of the following main sections: ■ supply protection ■ supervisory c...

  • Page 81

    Tm9100 service manual circuit descriptions 81 © tait electronics limitedaugust 2005 figure 3.6 block diagram of the power supply circuitry power supply trans- mitter frequency synthesizer codec and audio receiver digital board debug connector interface smps 3 v regulator 9 v regulator 9 v tx switch ...

  • Page 82

    82 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 power-sense options the radio allows the configuration of different power-sense options to control how the radio is powered up and down: ■ battery power sense ■ auxiliary power sense (ignition sense) ■ internal-optio...

  • Page 83

    Tm9100 service manual circuit descriptions 83 © tait electronics limitedaugust 2005 table 3.1 shows the configuration of the hardware links lk1, lk2 and lk4 for the individual power-sense options. It also lists the dependence of the power-sense options with respect to the gpi lines, which can or can...

  • Page 84

    84 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 battery power sense with this option, link lk1 connects +13 v 8 batt of the power connector to the power-up circuitry. With this option, when a 13.8 v supply is connected to the radio, the radio enters the programmed...

  • Page 85

    Tm9100 service manual circuit descriptions 85 © tait electronics limitedaugust 2005 operation in emergency mode if the radio is off when the emergency mode is activated, the radio is powered up but the display on the control head is not switched on. If the radio is on when the mode is activated, the...

  • Page 86: 3.7

    86 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 3.7 interface circuitry introduction for a block diagram of the interfaces circuitry, refer to figure 3.9 . For more on the connector pinouts, refer to “connectors” on page 34 . Bi-directional lines bi-directional li...

  • Page 87

    Tm9100 service manual circuit descriptions 87 © tait electronics limitedaugust 2005 figure 3.9 block diagram of the interface circuitry +13v8 batt agnd +3v3 +13v8 sw aux gpi2 aux gpi3 ch on off itf iop gpio7 aud itf spk+ aud itf spk- itf vol wip dc agnd itf ch mic aud cdc rx aud itf rx beep in cdcau...

  • Page 88: 3.8

    88 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 input signals (e.G. Aux gpio 4 ) an input signal applied to aux gpio 4 is coupled via r757 to itf aux gpi 4 and fed to the digital section. As the input signal may exceed the maximum allowed by the digital section, i...

  • Page 89

    Tm9100 service manual circuit descriptions 89 © tait electronics limitedaugust 2005 figure 3.10 block diagram of the digital board +1v8 +3v3 trans- mitter dig tx inh dig syn en syn lock dig syn tr sw dig syn fast dig syn latch syn dig fref frequency synthesizer dig syn spi do dig syn spi clk dig rx ...

  • Page 90: 3.9

    90 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 3.9 control-head board introduction this section describes the control-head board for the control head with graphical display. For a block diagram of the digital circuitry, refer to figure 3.11 . Most signals (except...

  • Page 91

    Tm9100 service manual circuit descriptions 91 © tait electronics limitedaugust 2005 figure 3.11 block diagram of the control-head board on/off keypad volume potentio- meter lcd lcd loom lcd connector function key and status leds keypad backlighting leds main keypad led lenses on/off key function/ sc...

  • Page 92

    92 circuit descriptions tm9100 service manual © tait electronics limitedaugust 2005 power supply a 3.3 v regulator (u1) converts the switched 13.8v supply from the radio body to 3.3 v. A 1.5 v regulator (u203) converts the 3.3 v to 1.5v. A power-sense module (u202) verifies the outputs of the voltag...

  • Page 93

    Tm9100 service manual 93 © tait electronics limitedaugust 2005 tm9100mobiles chapter 2 servicing the radio.

  • Page 94

    94 tm9100 service manual © tait electronics limitedaugust 2005 chapter 2 – servicing the radio 4 general information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 4.1 repair levels and website access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 4.2 tool...

  • Page 95

    Tm9100 service manual 95 © tait electronics limitedaugust 2005 10 receiver fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227 10.1 faulty receiver sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228 10.2 excessive loss of sensitivit...

  • Page 96

    96 tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 97: General Information

    Tm9100 service manual general information 97 © tait electronics limitedaugust 2005 4 general information scope of section this section discusses the two repair levels covered by the service manual, details concerning website access, the tools, equipment and spares required, and the setting up of the...

  • Page 98

    98 general information tm9100 service manual © tait electronics limitedaugust 2005 drivers are required as well as a service kit and, for diagnostic purposes, a spare control head. Skills and resources for level-2 repairs for level-2 repairs expertise is required in smt repairs of circuit boards wit...

  • Page 99

    Tm9100 service manual general information 99 © tait electronics limitedaugust 2005 pcb information pcb information for a particular circuit board consists of the relevant boms, grid reference indexes, pcb layouts, and circuit diagrams. (the grid reference indexes give the locations of components on ...

  • Page 100: 4.2

    100 general information tm9100 service manual © tait electronics limitedaugust 2005 4.2 tools, equipment and spares torque-drivers for level-1 and level-2 repairs, excluding smt repairs of the circuit boards, the following torque-drivers are required. ■ for level-1 repairs torx t6, torx t10, and tor...

  • Page 101

    Tm9100 service manual general information 101 © tait electronics limitedaugust 2005 service kit the service kit contains all the items needed for connecting the radio to the test equipment. The setting up of the equipment is described in “test equipment setup” on page 105 . The service kit also incl...

  • Page 102: 4.3

    102 general information tm9100 service manual © tait electronics limitedaugust 2005 4.3 servicing precautions introduction this section discusses the precautions that need to be taken when servicing the radios. These precautions fall into the following categories: ■ mechanical issues ■ compliance is...

  • Page 103

    Tm9100 service manual general information 103 © tait electronics limitedaugust 2005 esd precautions important this equipment contains devices which are susceptible to damage from static discharges. You must handle these devices carefully and according to the procedures described in the manufacturers...

  • Page 104

    104 general information tm9100 service manual © tait electronics limitedaugust 2005 transmitter issues the following issues relate to the operation of the transmitter: ■ rf and thermal burns ■ antenna loading ■ test transmissions ■ accidental transmissions ■ distress beacons the precautions required...

  • Page 105: 4.4

    Tm9100 service manual general information 105 © tait electronics limitedaugust 2005 4.4 test equipment setup introduction this section covers the setting up of the test equipment for servicing the radios, as well as related aspects: ■ setting up of test equipment, including test unit ■ basic program...

  • Page 106

    106 general information tm9100 service manual © tait electronics limitedaugust 2005 service cd install the programming and calibration applications on the test pc. These applications are included on the service cd supplied with the service kit. Figure 4.2 test setup radio connector (db15) rf connect...

  • Page 107: 4.5

    Tm9100 service manual general information 107 © tait electronics limitedaugust 2005 4.5 replacing board components this section describes the procedure for obtaining the correct replacement for any faulty component on the boards. ■ identify version of pcb information applicable to board ■ identify r...

  • Page 108: 4.6

    108 general information tm9100 service manual © tait electronics limitedaugust 2005 4.6 shielding cans and connectors the shielding cans on the top- and bottom-side of the main-board assembly are identified in figure 4.3 and figure 4.4 . The figures also show the locations of the connectors on the b...

  • Page 109

    Tm9100 service manual general information 109 © tait electronics limitedaugust 2005 can removal and installation cans are best removed and installed using a can-removal tool. If this tool is available, technicians should refer to the documentation supplied with the tool for the correct procedures. I...

  • Page 110: 4.7

    110 general information tm9100 service manual © tait electronics limitedaugust 2005 spare cans it is good practice to discard any can that has been removed and replace it with a spare can. If this is not done, special precautions are needed when re-installing the original can. These precautions are ...

  • Page 111

    Tm9100 service manual general information 111 © tait electronics limitedaugust 2005 figure 4.5 locations of the capacitors c548 and c565 and the inductors l601 and l602 top side (vhf board. Uhf board similar) note that other components may be fitted for c548 (such as c5085 and c5086 for uhf radios) ...

  • Page 112: 4.8

    112 general information tm9100 service manual © tait electronics limitedaugust 2005 4.8 computer-controlled test mode (cctm) the servicing procedures require a radio to be placed in the computer- controlled test mode. In this mode cctm commands can be entered at the test pc. These commands are then ...

  • Page 113

    Tm9100 service manual general information 113 © tait electronics limitedaugust 2005 this implies that the radio has entered cctm. If the attempt fails, repeat steps 1 to 3. Table 4.3 cctm commands in the audio category command usage entry at keyboard response on screen audio category 20 – mute recei...

  • Page 114

    114 general information tm9100 service manual © tait electronics limitedaugust 2005 table 4.4 cctm commands in the radio-information, radio-control and system categories command usage entry at keyboard response on screen radio-information category 94 – radio serial number reads the serial number of ...

  • Page 115

    Tm9100 service manual general information 115 © tait electronics limitedaugust 2005 table 4.5 cctm commands in the frequency-synthesizer and receiver categories command usage entry at keyboard response on screen frequency-synthesizer category 72 – lock status reads the lock status of the rf pll, fcl...

  • Page 116

    116 general information tm9100 service manual © tait electronics limitedaugust 2005 table 4.6 cctm commands in the transmitter category (part 1) command usage entry at keyboard response on screen transmitter category 33 – transmit mode sets the radio in the transmit mode 33 none 47 – temperature rea...

  • Page 117

    Tm9100 service manual general information 117 © tait electronics limitedaugust 2005 table 4.7 cctm commands in the transmitter category (part 2) command usage entry at keyboard response on screen transmitter category 331 – final bias 1 sets or reads the bias voltage for the first pa 331 (to read val...

  • Page 118

    118 general information tm9100 service manual © tait electronics limitedaugust 2005 table 4.8 cctm commands for the control-head command usage entry at keyboard response on screen 1000 – switch all leds switches all the function-key and status leds on or off 1000 x where x is the required state (0=o...

  • Page 119

    Tm9100 service manual general information 119 © tait electronics limitedaugust 2005 table 4.9 cctm commands of the remote control-head kit cctm command entry at keyboard response on screen 1012 – remote kit turns the audio amplifier on and off 1012 0 = off 1012 1 = on none 1013 – mute audio amplifie...

  • Page 120

    120 general information tm9100 service manual © tait electronics limitedaugust 2005 cctm error codes once the radio is in cctm, the cctm commands may be entered as shown in table 4.3 to table 4.7 . Depending on the command, a response might or might not be displayed. If an error occurs, an error cod...

  • Page 121: 4.9

    Tm9100 service manual general information 121 © tait electronics limitedaugust 2005 4.9 visual and audible indications visual and audible indicators give information about the state of the radio. Visual indications are provided by the status leds, function-key leds, and lcd display. The information ...

  • Page 122

    122 general information tm9100 service manual © tait electronics limitedaugust 2005 table 4.12 audible indications type of tone meanings one short beep (1) after power-up — radio is locked; pin is required (2) on power-down — radio is off (3) on pressing key — key-press is valid (4) on pressing func...

  • Page 123: Disassembly and Reassembly

    Tm9100 service manual disassembly and reassembly 123 © tait electronics limitedaugust 2005 5 disassembly and reassembly this section describes how to: ■ remove and mount the control head ■ disassemble and reassemble the radio body ■ disassemble and reassemble the control head general important befor...

  • Page 124: 5.1

    124 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005 5.1 removing and mounting the control head important before removing the control head, disconnect the radio from any test equipment or power supply. Removing the control head 1. Note which way up the control h...

  • Page 125: 5.2

    Tm9100 service manual disassembly and reassembly 125 © tait electronics limitedaugust 2005 5.2 disassembling the radio body disassemble only as much as necessary to replace the defective parts. For reassembly instructions, refer to “reassembling the radio body” on page 131 . Removing the cover 1. At...

  • Page 126

    126 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005 opening the radio body the circled numbers in this section refer to the items in figure 5.3 on page 127 . 1. Use a torx t20 screwdriver to remove the four screws c . Important if an options board is fitted ins...

  • Page 127

    Tm9100 service manual disassembly and reassembly 127 © tait electronics limitedaugust 2005 figure 5.3 components of the radio body b cover g chassis c screw m4x16 (x4) h auxiliary connector bung d lid assembly i screws m4x16 (x2) e screw m3x10 (x5) j rf connector seal f main-board assembly 1) gap pa...

  • Page 128

    128 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005 disassembling the main-board assembly the circled numbers in this section refer to the items in figure 5.4 on page 129 . This figure shows the 50w/40 w configuration. 1. Remove the power connector seal i . 2. ...

  • Page 129

    Tm9100 service manual disassembly and reassembly 129 © tait electronics limitedaugust 2005 figure 5.4 components of the main-board assembly b m3x10 screw (x3) h d-range screwlock fastener (2x) c 50w/40w radios: m2.2x10 pt screw (x2) 25w radios: k30x8 pt screw (x2) i power connector seal j power conn...

  • Page 130

    130 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005 removing an options board (optional) the radio may be fitted with an options board in the lid assembly, which may or may not have an external options connector fitted in a provision in the lid assembly. The ci...

  • Page 131: 5.3

    Tm9100 service manual disassembly and reassembly 131 © tait electronics limitedaugust 2005 5.3 reassembling the radio body inspect all disassembled parts for damage and replace them, if necessary. Reassembling the main-board assembly the circled numbers in this section refer to the items in figure 5...

  • Page 132

    132 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005 4. If the thermal paste on the heat-transfer block f or the tin-plated cooper plate of the main board 1$ has been contaminated, new thermal paste must be applied: ■ remove any residue of the old thermal paste ...

  • Page 133

    Tm9100 service manual disassembly and reassembly 133 © tait electronics limitedaugust 2005 fitting the main- board assembly to the chassis the circled numbers in this section refer to the items in figure 5.3 on page 127 . This figure shows the 50w/40w configuration. 1. With the 50w/40w radio, the l-...

  • Page 134

    134 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005 5. While pressing down firmly on the diagonal edge of the pad top can (refer to figure 5.7 ), use a torx t20 torque-driver to tighten the two screws i to 22lb·in (2.5n · m). This will ensure that the main boar...

  • Page 135: 5.4

    Tm9100 service manual disassembly and reassembly 135 © tait electronics limitedaugust 2005 5.4 disassembling and reassembling the control head disassemble only as much as necessary to replace the defective parts. Reassembly is carried out in reverse order of the disassembly. The circled numbers in t...

  • Page 136

    136 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005 7. Unscrew the four screws e and remove the control-head board f . 8. Pull the concealed microphone 1% capsule out of its rubber seal when removing the control head-board f . If necessary, unsolder the leads f...

  • Page 137

    Tm9100 service manual disassembly and reassembly 137 © tait electronics limitedaugust 2005 figure 5.9 components of the control head b m4 x 12 taptite screw (x2) c adaptor flange d control-head loom assembly e 3 x 10 pt screw (x4) f control-head board g space-frame seal (x2) h short light pipe i lon...

  • Page 138

    138 disassembly and reassembly tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 139: Servicing Procedures

    Tm9100 service manual servicing procedures 139 © tait electronics limitedaugust 2005 6 servicing procedures scope of section this section gives the full sequence of tasks required when servicing a particular radio. These tasks are: ■ initial inspection, visual inspection and fault diagnosis ■ repair...

  • Page 140

    140 servicing procedures tm9100 service manual © tait electronics limitedaugust 2005 the bung for aperture for external options connector should be replaced by a cover seal if an external options connector is present. All the parts are illustrated in “spare parts” on page 421 . Except for the microp...

  • Page 141

    Tm9100 service manual servicing procedures 141 © tait electronics limitedaugust 2005 task 3 — power up the radio with the radio connected to the test equipment as described in “test equipment setup” on page 105 , attempt to power up the radio. 1. Apply power to the radio. If the radio is programmed ...

  • Page 142

    142 servicing procedures tm9100 service manual © tait electronics limitedaugust 2005 task 4 — read the programming file given that the radio powers up, the next task is to read the radio’s programming file or upload a default file. 1. Use the programming application to read the programming file. 2. ...

  • Page 143

    Tm9100 service manual servicing procedures 143 © tait electronics limitedaugust 2005 task 5 — obtain the details of the software feature enabler (sfe) use the programming application to obtain and record the details of any software-enabled features (tools > optional features). For more information r...

  • Page 144

    144 servicing procedures tm9100 service manual © tait electronics limitedaugust 2005 task 8 — check error messages the radio may display an error message. Carry out the corrective actions described in table 6.1 . Table 6.1 error messages error message corrective action error e0001 unknown turn the r...

  • Page 145

    Tm9100 service manual servicing procedures 145 © tait electronics limitedaugust 2005 task 9 — check the transmit and transmit-audio functions if the radio does not transmit, this can be caused by: ■ the synthesizer not being in lock ■ no or wrong carrier power ■ a faulty speaker ■ no modulation if t...

  • Page 146

    146 servicing procedures tm9100 service manual © tait electronics limitedaugust 2005 14. If the main-board assembly was replaced or if the repair failed, re- assemble the radio as described in “disassembly and reassembly” on page 123 . Conclude with the tasks of “final tasks” on page 147 . Task 10 —...

  • Page 147: 6.2

    Tm9100 service manual servicing procedures 147 © tait electronics limitedaugust 2005 12. If the volume potentiometer is faulty, repair it as described in “volume control faulty” on page 416 . If it is not faulty, go to step 13 . 13. After having eliminated the synthesizer, the receiver circuitry, th...

  • Page 148

    148 servicing procedures tm9100 service manual © tait electronics limitedaugust 2005 3. If the main-board assembly has been replaced, level-1 service centers should return the faulty board to the nearest asc, and level-2 service centers should return the board or assembly to the isc, if deemed neces...

  • Page 149

    Tm9100 service manual servicing procedures 149 © tait electronics limitedaugust 2005 8. On receiving the licence file, run the programming application on the test pc. On the menu bar click tools > optional features. The software feature enabler dialog appears. 9. Use the licence file to enable the a...

  • Page 150

    150 servicing procedures tm9100 service manual © tait electronics limitedaugust 2005 table 6.2 final tests of transmitter function test limits error in transmit frequency +100 hz to –100 hz transmit power: • high • medium • low • very low 23.2 w to 29.2 w 11.1 w to 14.0 w 4.6 w to 5.8 w 0.9 w to 1.2...

  • Page 151

    Tm9100 service manual servicing procedures 151 © tait electronics limitedaugust 2005 table 6.4 final tests of general radio functions test description ptt switch check that ptt switch functions. Microphone check operation of microphone. Check operation of hook-switch. Data communications test 1200 b...

  • Page 152

    152 servicing procedures tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 153

    Tm9100 service manual power supply fault finding 153 © tait electronics limitedaugust 2005 7 power supply fault finding fault-diagnosis tasks fault diagnosis of the power-supply circuitry is divided into six tasks: ■ check inputs to smps ■ check 3.3 v supply ■ check linear regulators ■ check power-u...

  • Page 154

    154 power supply fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 1 — check inputs to smps the test equipment and radio should be set up as described in “test equipment setup” on page 105 . If not already done, remove the main- board assembly from the chassis. Connect t...

  • Page 155

    Tm9100 service manual power supply fault finding 155 © tait electronics limitedaugust 2005 figure 7.1 important components of the power-supply circuitry (bottom side), including 3.3v regulator ic602 pin 7 pin 5.

  • Page 156

    156 power supply fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 2 — check 3.3 v supply if the inputs at pin 5 and pin 7 of ic602 in the smps circuitry are correct, but the radio fails to power up, then the 3.3v dc supply needs to be investigated. 1. First determine as...

  • Page 157

    Tm9100 service manual power supply fault finding 157 © tait electronics limitedaugust 2005 2. Disconnect the 13.8v supply at the power connector. Remove r199 (see figure 7.1 ). Reconnect the 13.8v supply. 3. With the probe of the multimeter on the 3 v 3 test point, press the on / off key. If the vol...

  • Page 158

    158 power supply fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 3 — check linear regulators this task describes the general procedure for checking any linear regulator. There are two possible faults: either the regulator has failed and prevents the radio from powering...

  • Page 159

    Tm9100 service manual power supply fault finding 159 © tait electronics limitedaugust 2005 task 4 — check power-up configuration the radio may be configured for one or more of the following power-up options: ■ battery power sense ■ auxiliary power sense ■ emergency power sense ■ internal-options pow...

  • Page 160

    160 power supply fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 5 — check power-up options the functioning of the power-up options may be checked as described in step 1 to step 4 below. Carry out the procedure in the appropriate step or steps. In all four cases the pr...

  • Page 161

    Tm9100 service manual power supply fault finding 161 © tait electronics limitedaugust 2005 4. For the internal-options power-sense option the link lk4 should be inserted (see figure 7.2 ). Connect +3.3 v dc (more than 2.6v to be precise) from the power supply to the iop gpio 7 line (pin 15 of the in...

  • Page 162

    162 power supply fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 6 — check provision of external power external power is supplied to pin 8 of the auxiliary connector sk101. The power is normally switched, but will be unswitched if all the links lk5 to lk8 are inserted....

  • Page 163: Interface Fault Finding

    Tm9100 service manual interface fault finding 163 © tait electronics limitedaugust 2005 8 interface fault finding introduction this section covers the diagnosis of faults involving signals output from or input to the radio’s internal circuitry via the control-head, internal options, power, or auxili...

  • Page 164

    164 interface fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 8.2 components of the interface circuitry (top side near the cdc top and if top cans) figure 8.3 components of the interface circuitry (top side at the corner) cdc top can if top can.

  • Page 165

    Tm9100 service manual interface fault finding 165 © tait electronics limitedaugust 2005 task 1 — check output lines for an output line suspected or reported to be faulty, compare actual and expected signals as described below. If necessary, determine what an expected signal should be by copying the ...

  • Page 166

    166 interface fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 8.4 components of the interface circuitry (bottom side).

  • Page 167

    Tm9100 service manual interface fault finding 167 © tait electronics limitedaugust 2005 task 2 — check input lines for an input line suspected or reported to be faulty, proceed as follows: 1. For a suspect ch on off line, go to step 4 . For all other input lines go to step 2 . 2. For the suspect lin...

  • Page 168

    168 interface fault finding tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 169

    Tm9100 service manual frequency synthesizer fault finding 169 © tait electronics limitedaugust 2005 9 frequency synthesizer fault finding introduction this section covers the diagnosis of faults in the frequency synthesizer. The sections are divided into the following: ■ initial checks ■ fault diagn...

  • Page 170: 9.1

    170 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 9.1 initial checks types of checks there are two different types of initial checks, which are covered in the following tasks: ■ task 1 : calibration checks ■ task 2 : lock status which, if any, of the...

  • Page 171

    Tm9100 service manual frequency synthesizer fault finding 171 © tait electronics limitedaugust 2005 task 1 — system error a system error indicates a fault in the calibration of either the fcl or the frequency synthesizer. To determine which is faulty, calibrate the vcxo and the transmit vco as descr...

  • Page 172

    172 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 10. If the lock status is 111 or 110, the synthesizer is functioning in the receive mode, and the power supplies and pll are functioning correctly. Go to “loop filter” on page 187 to check the loop fi...

  • Page 173: 9.2

    Tm9100 service manual frequency synthesizer fault finding 173 © tait electronics limitedaugust 2005 9.2 power supplies introduction first check that a power supply is not the cause of the fault. There are four power supplies for the frequency synthesizer — two are supplied from the psu (power supply...

  • Page 174

    174 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 3 — 14v power supply first check the output vcl supply from the smps, which is itself provided with a 9 v dc supply from a 9 v regulator in the psu module. 1. Remove the main-board assembly from ...

  • Page 175

    Tm9100 service manual frequency synthesizer fault finding 175 © tait electronics limitedaugust 2005 figure 9.2 synthesizer circuitry under the syn top can and the 6 v regulator ic606 (top side) b1 band h5/h6 bands measurement point on l506 (pin not used) pin 5 (5-pin device) q5004 q508 q512 q507 q50...

  • Page 176

    176 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 9.3 synthesizer circuitry under the fcl top can (top side) syn top can.

  • Page 177

    Tm9100 service manual frequency synthesizer fault finding 177 © tait electronics limitedaugust 2005 task 4 — 6v power supply if the output of the smps is correct, check the 6 v dc supply next. 1. Measure the supply +6 v 0 at pin 4 of ic606 (see figure 9.2 ). 2. If the voltage is correct, go to task ...

  • Page 178

    178 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 9.4 synthesizer circuitry under the syn bot and vco bot cans (bottom side) b1 band h5/h6 bands q511 q505.

  • Page 179

    Tm9100 service manual frequency synthesizer fault finding 179 © tait electronics limitedaugust 2005 task 5 — 5v power supply if the smps output and 6v dc supply are correct, check the +5 v dec supply next. 1. Remove the syn top can. 2. Measure the supply +5 v dec at pin 4 of q508 (see figure 9.2 ). ...

  • Page 180

    180 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 6 — 3v power supply if the smps output and the 6 v and 5 v supplies are correct, the remaining power supply to check is the 3 v dc supply. 1. Measure the supply +3 v 0 an at pins 7 and 15 of ic50...

  • Page 181: 9.3

    Tm9100 service manual frequency synthesizer fault finding 181 © tait electronics limitedaugust 2005 9.3 phase-locked loop introduction if there is no fault with the power supplies, check the critical output from, and inputs to, the pll: ■ task 7 : supply for charge pump ■ task 8 : reference frequenc...

  • Page 182

    182 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 9.5 test and measurement points for the synthesizer pll and loop filter feedba ck vo lt a g e pin 6 of ic505 feedba ck vo lt a g e pin 6 of ic505 pin 16 of ic503 pin 16 of ic503 pin 5 of ic505 ...

  • Page 183

    Tm9100 service manual frequency synthesizer fault finding 183 © tait electronics limitedaugust 2005 task 8 — reference frequency if the supply for the charge pump is correct, check the reference frequency input from the fcl to the pll. 1. Measure the reference frequency at pin 8 of ic503 (see figure...

  • Page 184

    184 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 9 — dig syn en line if the supply for the charge pump and the reference frequency are correct, check the dig syn en line input. 1. Check the dig syn en line at pin 10 of ic503 (see figure 9.2 ). ...

  • Page 185

    Tm9100 service manual frequency synthesizer fault finding 185 © tait electronics limitedaugust 2005 task 10 — syn lock line if all the critical inputs to the pll are correct, check the syn lock line output. 1. Enter the cctm command 72 to determine the lock status in receive mode. Note the status. 2...

  • Page 186

    186 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 9.7 synthesizer circuitry under the syn top can (top side) b1 band h5/h6 bands q512 q512 junction of c541 and r547 junction of c541 and r547.

  • Page 187: 9.4

    Tm9100 service manual frequency synthesizer fault finding 187 © tait electronics limitedaugust 2005 9.4 loop filter introduction if the power supplies for the frequency synthesizer are correct, and the pll is functioning properly, check the loop filter next: ■ task 11 : check loop voltage ■ task 12 ...

  • Page 188

    188 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 12 — vco faulty if the loop voltage is correct, the loop filter is functioning properly. The vco and related circuitry is therefore suspect. The section to proceed to depends on the type of the r...

  • Page 189

    Tm9100 service manual frequency synthesizer fault finding 189 © tait electronics limitedaugust 2005 task 14 — check feedback voltage if the loop filter is suspect but the reference voltage is correct, check the feedback voltage. 1. Measure the feedback voltage at pin 6 of ic505 (see figure 9.4 ). Th...

  • Page 190

    190 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 15 — check dig syn fast line if the loop filter is suspect but the reference and feedback voltages are correct, check the dig syn fast line, which is input to the inverter. 1. Enter the cctm comm...

  • Page 191

    Tm9100 service manual frequency synthesizer fault finding 191 © tait electronics limitedaugust 2005 task 16 — check tp 503 test point if the reference voltage, feedback voltage, and dig syn fast line are all correct, check the voltage at the tp 503 test point. 1. Measure the voltage at the tp 503 te...

  • Page 192: 9.5

    192 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 9.5 receive vco and related circuitry (uhf radios) introduction if there is no fault with the power supplies, the pll inputs and output, and the loop filter, check the vco and related circuitry. The p...

  • Page 193

    Tm9100 service manual frequency synthesizer fault finding 193 © tait electronics limitedaugust 2005 figure 9.8 measurement points for the vco and related circuitry in uhf radios +5v dec pin 6 of q5001 pin 6 of q5001 pin 3 of q506 pin 3 of q506 q508 and r593 q508 and r593 pin 6 of q506 pin 6 of q506 ...

  • Page 194

    194 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 17 — check receive vco check that the correct receive frequency is synthesized. This is the frequency of the receive vco output syn rx lo 1 at the rx port shown in figure 9.9 . 1. Enter the cctm ...

  • Page 195

    Tm9100 service manual frequency synthesizer fault finding 195 © tait electronics limitedaugust 2005 figure 9.9 synthesizer circuitry under the syn top and vco top cans (uhf radio, top side) tx port junction of c541 and r547 rx port q507 q506 q508.

  • Page 196

    196 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 18 — repair pll feedback if both the minimum and maximum receive frequencies are correct, the pll feedback is suspect. 1. Resolder r542 in position (see figure 9.9 ). 2. Remove the vco bot can. 3...

  • Page 197

    Tm9100 service manual frequency synthesizer fault finding 197 © tait electronics limitedaugust 2005 task 19 — repair receive vco if either or both the minimum and maximum receive frequencies are incorrect, the receive vco circuitry is faulty. 1. Remove the vco top can. 2. Check the receive vco. The ...

  • Page 198

    198 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 20 — check switching to receive mode if no receive frequency is detected in the check of the receive vco, first check that the transmit-receive switch is functioning correctly. 1. Resolder r542 i...

  • Page 199

    Tm9100 service manual frequency synthesizer fault finding 199 © tait electronics limitedaugust 2005 task 21 — repair switching network if the transmit-receive switch is not functioning correctly, first check the dig syn tr sw line to confirm that the digital board is not the cause. If the digital bo...

  • Page 200

    200 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 22 — check receive buffer amplifier if no receive frequency is detected but the switching network is not faulty, check the receive buffer amplifier. If the amplifier is not faulty, there might be...

  • Page 201: 9.6

    Tm9100 service manual frequency synthesizer fault finding 201 © tait electronics limitedaugust 2005 9.6 transmit vco and related circuitry (uhf radios) introduction if there is no fault with the power supplies, the pll inputs and output, and the loop filter, check the vco and related circuitry. The ...

  • Page 202

    202 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 23 — check transmit vco check that the correct transmit frequency is synthesized. This is the frequency of the transmit vco output syn tx lo at the tx port shown in figure 9.9 . 1. Enter the cctm...

  • Page 203

    Tm9100 service manual frequency synthesizer fault finding 203 © tait electronics limitedaugust 2005 task 24 — repair pll feedback if both the minimum and maximum transmit frequencies are correct, the pll feedback is suspect. 1. Resolder r542 in position (see figure 9.9 ). 2. Remove the vco bot can. ...

  • Page 204

    204 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 26 — check switching to transmit mode if no transmit frequency is detected in the check of the transmit vco, first check that the transmit-receive switch is functioning correctly. 1. Resolder r54...

  • Page 205

    Tm9100 service manual frequency synthesizer fault finding 205 © tait electronics limitedaugust 2005 task 27 — check transmit buffer amplifier if no transmit frequency is detected but the switching network is not faulty, check the transmit buffer amplifier. If the amplifier is not faulty, there might...

  • Page 206: 9.7

    206 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 9.7 vco and related circuitry (vhf radios) introduction if there is no fault with the power supplies, the pll inputs and output, and the loop filter, check the vco and related circuitry. The procedure...

  • Page 207

    Tm9100 service manual frequency synthesizer fault finding 207 © tait electronics limitedaugust 2005 figure 9.11 measurement points for the vco and related circuitry in vhf radios +5v dec pin 1 of d5004 pin 1 of d5004 pin 3 of q5003 pin 3 of q5003 pin 2 of q5001 pin 2 of q5001 pin 2 of d5004 pin 2 of...

  • Page 208

    208 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 28 — check vco check that the correct receive and transmit frequencies are synthesized. The receive frequency is that of the vco output syn rx lo 1 at the rx port shown in figure 9.12 . The trans...

  • Page 209

    Tm9100 service manual frequency synthesizer fault finding 209 © tait electronics limitedaugust 2005 figure 9.12 synthesizer circuitry under the syn top can (vhf radio, top side) tx port junction of c541 and r547 rx port.

  • Page 210: Vco Bot

    210 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 29 — repair pll feedback if both the maximum and minimum vco frequencies are correct, then the pll feedback is suspect. 1. Resolder r542 in position (see figure 9.12 ). 2. Remove the vco bot can....

  • Page 211

    Tm9100 service manual frequency synthesizer fault finding 211 © tait electronics limitedaugust 2005 task 30 — repair vco if either or both the maximum and minimum frequencies are incorrect, the vco circuitry is faulty. 1. Remove the vco bot can. 2. Check the vco. The circuitry is based on q5000 (see...

  • Page 212

    212 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 31 — check transmit- receive switch if no frequency is detected in the check of the vco, first check that the transmit-receive switch is functioning correctly. 1. Resolder r542 in position (see f...

  • Page 213

    Tm9100 service manual frequency synthesizer fault finding 213 © tait electronics limitedaugust 2005 task 32 — repair switching network if the transmit-receive switch is not functioning correctly, first check the dig syn tr sw line to confirm that the digital board is not the cause. If the digital bo...

  • Page 214

    214 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 33 — check buffer amplifier if no vco frequency is detected but the switching network is not faulty, check the buffer amplifier. If the amplifier is not faulty, there might be a fault in the vco ...

  • Page 215: 9.8

    Tm9100 service manual frequency synthesizer fault finding 215 © tait electronics limitedaugust 2005 9.8 power supply for fcl fault-diagnosis stages indications of a fault in the fcl will have been revealed by the initial checks in “initial checks” on page 170 and the pll checks in “phase-locked loop...

  • Page 216

    216 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 9.14 test and measurement points the fcl circuitry rf analog clock digit al signal types psu lpf mixer vcxo tcxo modula t or b uffer amplifier a gnd digit al bo ard cdc vcxo mod syn cdc fcl b u...

  • Page 217

    Tm9100 service manual frequency synthesizer fault finding 217 © tait electronics limitedaugust 2005 task 34 — power supply if the fcl is suspect, first check that the 3 v power supply is not the cause of the fault. 1. If not already done, remove the main-board assembly from the chassis and place the...

  • Page 218: 9.9

    218 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 9.9 vcxo and tcxo outputs task 35 — vcxo output if the 3v power supply is not faulty, check the vcxo output as follows: 1. Use an oscilloscope probe to check the vcxo output at c536 — probe the via ne...

  • Page 219

    Tm9100 service manual frequency synthesizer fault finding 219 © tait electronics limitedaugust 2005 figure 9.16 fcl circuitry under and adjacent the fcl top can via for measuring vcxo output position in which to place r527 for fault-diagnosis purposes when loop oscillates.

  • Page 220

    220 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 36 — tcxo output if the vcxo output is correct, check the tcxo output as follows: 1. Use the oscilloscope probe to check the tcxo output at the tp 504 test point (see figure 9.16 ). The signal is...

  • Page 221: 9.10

    Tm9100 service manual frequency synthesizer fault finding 221 © tait electronics limitedaugust 2005 9.10 signals at tp501 and tp502 introduction if the vcxo and tcxo outputs are correct, the next stage is to check the signals at the tp 501 and tp 502 test points. The procedure is divided into three ...

  • Page 222

    222 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 38 — tp501 test point if the signal at the tp 502 test point is correct, check the signal at the tp 501 test point: 1. With the oscilloscope probe at the tp 501 test point (see figure 9.16 ), che...

  • Page 223

    Tm9100 service manual frequency synthesizer fault finding 223 © tait electronics limitedaugust 2005 task 39 — tp502 test point (tp501 grounded) if the loop was oscillating, task 38 will have revealed any fault in the vcxo circuitry. If there was no fault, or if the circuit was repaired, a check at t...

  • Page 224: 9.11

    224 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 9.11 vcxo and codec circuitry introduction if the signals at the tp 501 and tp 502 test points are correct, two cctm checks will reveal any remaining faults. These possible faults concern the vcxo tan...

  • Page 225

    Tm9100 service manual frequency synthesizer fault finding 225 © tait electronics limitedaugust 2005 task 41 — vcxo tank circuit if the cctm checks indicate that the vcxo tank circuit is faulty, repair the circuit as follows: 1. If not already done, remove the vcxo bot can. 2. Locate and repair the f...

  • Page 226

    226 frequency synthesizer fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 42 — codec 2 circuitry if the cctm checks indicate a fault in the codec 2 circuitry or with the digital signals to and from the circuitry, rectify the fault as follows: 1. Most of the codec 2 cir...

  • Page 227: Receiver Fault Finding

    Tm9100 service manual receiver fault finding 227 © tait electronics limitedaugust 2005 10 receiver fault finding fault conditions this section covers the diagnosis of faults in the receiver. The fault-diagnosis procedures consist of 18 tasks grouped into the following sections. The symptoms of the f...

  • Page 228: 10.1

    228 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 10.1 faulty receiver sensitivity introduction this section covers the determination of the extent of the receiver’s loss of sensitivity. Depending on the nature of the fault, a reduction in receiver sensitivity of...

  • Page 229

    Tm9100 service manual receiver fault finding 229 © tait electronics limitedaugust 2005 figure 10.1 receiver circuitry under the if top can (top side) q404 h5/h6 bands measurement point b1 band q404 measurement point.

  • Page 230: 10.2

    230 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 10.2 excessive loss of sensitivity introduction this section covers the case where the receiver has suffered an excessive loss of sensitivity. As measured in task 1 , the receiver gain will be less than 1500, whic...

  • Page 231

    Tm9100 service manual receiver fault finding 231 © tait electronics limitedaugust 2005 figure 10.2 receiver circuitry under the lo 2 bot can (bottom side) h5/h6 bands b1 band figure 10.3 receiver circuitry under the fe top can (top side) measurement point q401.

  • Page 232

    232 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 3 — check logic signal if there is no fault with the power supplies, check the logic signal dig rx en that is input from the digital board. 1. Check the logic signal dig rx en at pin 8 of ic403 (see figure 10...

  • Page 233

    Tm9100 service manual receiver fault finding 233 © tait electronics limitedaugust 2005 task 5 — check biasing of if amplifier if the lock status is normal, check the biasing of the if amplifier. 1. Remove the if top can. 2. Check all components around q404 of the if amplifier (see figure 10.1 ). 3. ...

  • Page 234: 10.3

    234 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 10.3 moderate or slight loss of sensitivity introduction this section covers the case where the receiver has suffered a moderate or slight loss of sensitivity. As measured in task 1, the receiver gain will be less...

  • Page 235

    Tm9100 service manual receiver fault finding 235 © tait electronics limitedaugust 2005 task 8 — moderately low sensitivity following the initial investigation in task 7 , check the circuitry as follows when the sensitivity loss is moderate. 1. Remove the fe top can and, if not already done, the if t...

  • Page 236

    236 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 9 — slightly low sensitivity following the initial investigation in task 7 , check the circuitry as follows when the sensitivity loss is slight. 1. Remove the fe top can and, if not already done, the if top c...

  • Page 237: 10.4

    Tm9100 service manual receiver fault finding 237 © tait electronics limitedaugust 2005 10.4 incorrect rssi readings introduction if the rssi readings are incorrect, the receiver calibration is suspect. There are four tasks, which cover the four types of settings concerned: ■ task 10 : agc voltage ca...

  • Page 238

    238 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 11 — fe tune bpf settings if the agc voltage calibration is correct, check the fe tune bpf settings. 1. Note the settings listed in the “fe tune bpf settings” field. The nominal settings should be as listed i...

  • Page 239: 10.5

    Tm9100 service manual receiver fault finding 239 © tait electronics limitedaugust 2005 10.5 faulty radio mute introduction if the radio mute is faulty, the calibration settings are suspect. There are three tasks: ■ task 14 : determine type of muting selected ■ task 15 : noise muting selected ■ task ...

  • Page 240

    240 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 15 — noise muting selected with noise muting selected, check the noise mute settings: 1. In the calibration application open the “deviation/squelch” page and click the “squelch and signaling thresholds” tab. ...

  • Page 241

    Tm9100 service manual receiver fault finding 241 © tait electronics limitedaugust 2005 task 16 — rssi muting selected with rssi muting selected, check the rssi mute settings. 1. In the calibration application open the “deviation/squelch” page and click the “squelch and signaling thresholds” tab. 2. ...

  • Page 242: 10.6

    242 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005 10.6 high receiver distortion introduction if there is high receiver distortion, the tcxo is suspect, or alternatively, the matching circuitry for the crystal filters xf400 and xf401. There are two tasks: ■ task 1...

  • Page 243

    Tm9100 service manual receiver fault finding 243 © tait electronics limitedaugust 2005 task 18 — second if and repair of matching circuitry if the tcxo is not faulty, check the second if and, if necessary, repair the matching circuitry. 1. Input a large unmodulated rf input signal exceeding –90dbm a...

  • Page 244

    244 receiver fault finding tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 245: Transmitter Fault Finding

    Tm9100 service manual transmitter fault finding (50w/40w radios) 245 © tait electronics limitedaugust 2005 11 transmitter fault finding (50w/40w radios) introduction this section covers the diagnosis of faults in the transmitter circuitry of the 50 w/40w radios. The main indication of a fault in the...

  • Page 246

    246 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 frequency bands some fault-diagnosis tasks require programming the radio with the lowest, center or highest frequency in the radio’s frequency band. The relevant frequencies for the different b...

  • Page 247

    Tm9100 service manual transmitter fault finding (50w/40w radios) 247 © tait electronics limitedaugust 2005 transmit tests the following points need to be borne in mind when carrying out transmit tests: ■ secure main-board assembly ■ ensure proper antenna load ■ limit duration of transmit tests ■ pro...

  • Page 248: 11.1

    248 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 11.1 power supplies introduction first check that a power supply is not the cause of the fault. There are two power supplies and a switch circuit for the transmitter: ■ task 1 : 13.8v dc supply...

  • Page 249

    Tm9100 service manual transmitter fault finding (50w/40w radios) 249 © tait electronics limitedaugust 2005 task 1 — 13.8v power supply first check the power supply from the power connector. 1. Obtain a needle probe to use for measurements of the power supply at the pa driver and pas. If none is avai...

  • Page 250: Q310

    250 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.2 point for measuring the power supply to the pas (b1 band) q310 b1 band q309 l310 paf top measurement point on l310

  • Page 251: Paf Top

    Tm9100 service manual transmitter fault finding (50w/40w radios) 251 © tait electronics limitedaugust 2005 figure 11.3 point for measuring the power supply to the pas (h5 and h7 bands) paf top h5, h7 bands q310 q309 l310 measurement point on l310

  • Page 252

    252 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.4 point for measuring the power supply to the pa driver (b1 band) b1 band l306 q308 r339 r350 q306 pad top measurement point on l306 point 1 on r350 measurement point on r339 point 2 ...

  • Page 253

    Tm9100 service manual transmitter fault finding (50w/40w radios) 253 © tait electronics limitedaugust 2005 figure 11.5 point for measuring the power supply to the pa driver (h5 and h7 bands) r339 q308 h5, h7 bands l306 r350 q306 pad top measurement point on l306 point 1 on r350 measurement point on ...

  • Page 254

    254 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 2 — check switch circuit if the power supply to the drains of the pas and pa driver is not correct, the switch circuit is suspect. Check the circuit as follows: 1. Measure the voltage at t...

  • Page 255

    Tm9100 service manual transmitter fault finding (50w/40w radios) 255 © tait electronics limitedaugust 2005 task 3 — 9v power supply if the supply from the power connector is correct, check the 9v dc supply. 1. Enter the cctm command 326 1 to set the transmitter power level very low. 2. Enter the cct...

  • Page 256

    256 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.6 test points for checking the 9v supply, the forward and reverse rf power, and the inhibiting of the transmitter b1 b and h5, h7 b ands if t op can vco to p can if t op can dirc t op...

  • Page 257: 11.2

    Tm9100 service manual transmitter fault finding (50w/40w radios) 257 © tait electronics limitedaugust 2005 11.2 transmitter rf power introduction if there is no fault with the power supplies, check the transmitter rf power and correct any fault. The procedure is covered in the following eight tasks:...

  • Page 258

    258 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.7 measurement and test points for diagnosing faults concerning the transmitter rf power rev pwr test point rev pwr test point fwd pwr test point fwd pwr test point lead t o test set l...

  • Page 259

    Tm9100 service manual transmitter fault finding (50w/40w radios) 259 © tait electronics limitedaugust 2005 task 4 — check forward and reverse powers first check the forward and reverse powers for an indication of which part of the circuitry is suspect. 1. Enter the cctm command 326 4 to set the tran...

  • Page 260

    260 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 5 — check rf output power if the power supplies are correct, check the rf output power of the transmitter. 1. Enter the cctm command 326 5 to set the transmitter power level to the maximum...

  • Page 261

    Tm9100 service manual transmitter fault finding (50w/40w radios) 261 © tait electronics limitedaugust 2005 task 6 — power unchanged regardless of setting if all the power and current values measured in task 5 are correct, it is likely that the power remains unchanged regardless of the power setting....

  • Page 262

    262 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 7 — check for inhibiting of transmitter if the transmitter is drawing no current or the wrong current, check whether it is being inhibited. This check is also required if a co3 error occur...

  • Page 263

    Tm9100 service manual transmitter fault finding (50w/40w radios) 263 © tait electronics limitedaugust 2005 task 8 — check temperature sensor if the transmitter is being inhibited and the logic signal at the d tx inh test point is active, a fault in the temperature sensor might be the cause. 1. Enter...

  • Page 264

    264 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.8 pa circuitry under the paf top can and part of the directional coupler under the dirc top can (b1 band) b1 band c348 c349 c350 d301 q309 q310 test pad mounting point for test capaci...

  • Page 265

    Tm9100 service manual transmitter fault finding (50w/40w radios) 265 © tait electronics limitedaugust 2005 figure 11.9 pa circuitry under the paf top can and part of the directional coupler under the dirc top can (h5 and h7 bands) h5, h7 bands c348 c349 c350 d301 q310 q309 test pad mounting point fo...

  • Page 266

    266 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 9 — power and current are skewed if the rf output power and the supply current are skewed, the output matching is suspect. 1. Remove the dirc top can. 2. Remove the coupling capacitors c34...

  • Page 267

    Tm9100 service manual transmitter fault finding (50w/40w radios) 267 © tait electronics limitedaugust 2005 task 10 — repair output matching circuitry if the checks in task 9 show that the power and current are still skewed, there is a fault in the output matching circuitry. 1. If not already done, r...

  • Page 268

    268 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 11 — power and current are low if the rf output power and the supply current are uniformly low at all frequencies, one of the pas is suspect or the input to the pas is reduced. Check each ...

  • Page 269: 11.3

    Tm9100 service manual transmitter fault finding (50w/40w radios) 269 © tait electronics limitedaugust 2005 11.3 biasing of pa driver and pas introduction the measurements of the transmitter rf output power in “transmitter rf power” might indicate a need to check the biasing of the two pas and the pa...

  • Page 270

    270 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.10 measurement and test points for diagnosing faults in the biasing of the pas and pa driver pin switch and lpf rev pwr fwd pwr r336 r347 direc- tional coupler pa s b uffer amplifier ...

  • Page 271

    Tm9100 service manual transmitter fault finding (50w/40w radios) 271 © tait electronics limitedaugust 2005 task 13 — check biasing of first pa check the biasing of the first pa (q310). Important ensure that the current limit on the dc supply is 3 a. And, when entering the cctm command 331 x, do not ...

  • Page 272

    272 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.11 test points and components of the shaping filter (b1 band) r340 r334 r347 r342 c324 c322 r336 r333 ic303 ic301 b1 band dirc top can drv test point rev pwr test point fwd pwr test p...

  • Page 273

    Tm9100 service manual transmitter fault finding (50w/40w radios) 273 © tait electronics limitedaugust 2005 figure 11.12 test points and components of the shaping filter (h5 and h7 bands) ic301 r334 ic303 r333 r336 r347 r342 c324 c322 h5, h7 bands dirc top can fwd pwr test point rev pwr test point if...

  • Page 274

    274 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 14 — shaper and level shifter if the voltage measured in task 13 is correct but not the current, either the first pa or the shaper and level shifter for the pa is suspect. Important ensure...

  • Page 275

    Tm9100 service manual transmitter fault finding (50w/40w radios) 275 © tait electronics limitedaugust 2005 figure 11.13 pa circuitry under the paf top can (b1 band) b1 band q310 q309 circuitry between ic301 and pas via to gate of q310 via to gate of q309 via to pin 14 of ic301 via to pin 8 of ic301.

  • Page 276

    276 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.14 pa circuitry under the paf top can (h5 and h7 bands) h5, h7 bands q310 q309 circuitry between ic301 and pas via to gate of q310 via to gate of q309 via to pin 14 of ic301 via to pi...

  • Page 277

    Tm9100 service manual transmitter fault finding (50w/40w radios) 277 © tait electronics limitedaugust 2005 task 15 — shaping filter for power control if neither the voltage nor the current measured in task 13 is correct, then the shaping filter for the power-control circuitry or the codec and audio ...

  • Page 278

    278 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 16 — check biasing of second pa if the biasing of the first pa is correct, check that of the second pa (q309). Important ensure that the current limit on the dc supply is 3a. And, when ent...

  • Page 279

    Tm9100 service manual transmitter fault finding (50w/40w radios) 279 © tait electronics limitedaugust 2005 task 17 — shaper and level shifter if the voltage measured in task 16 is correct but not the current, either the second pa or the shaper and level shifter for the pa is suspect. Important ensur...

  • Page 280

    280 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 18 — shaping filter for power control if neither the voltage nor the current measured in task 16 is correct, then the shaping filter for the power-control circuitry or the codec and audio ...

  • Page 281

    Tm9100 service manual transmitter fault finding (50w/40w radios) 281 © tait electronics limitedaugust 2005 task 19 — biasing of pa driver — drv test point if there is no fault in the biasing of the pas, investigate the biasing of the pa driver (q306). First check the drv test point. Important ensure...

  • Page 282

    282 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 20 — biasing of pa driver— set pwr test point if the voltage at the drv test point is correct, check that at the set pwr test point. 1. Check the voltage at the set pwr test point (see fig...

  • Page 283

    Tm9100 service manual transmitter fault finding (50w/40w radios) 283 © tait electronics limitedaugust 2005 figure 11.15 pa driver circuitry under the pad top can (b1 band) pad top q3504 b1 band r327 c310 r324 q306 components c310, r324 and r327 gate of q306.

  • Page 284

    284 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.16 pa driver circuitry under the pad top can (h5 and h7 bands) pad top h5, h7 bands q306 r324 c310 r327 gate of q306 components c310, r324 and r327.

  • Page 285

    Tm9100 service manual transmitter fault finding (50w/40w radios) 285 © tait electronics limitedaugust 2005 task 21 — check power control check the power-control circuitry if the clamp current for the pa driver is correct or if the voltage at the set pwr test point is incorrect. Important ensure that...

  • Page 286

    286 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.17 circuitry under the dirc top can b1 band h5, h7 bands r3035 d305 r383 d305.

  • Page 287

    Tm9100 service manual transmitter fault finding (50w/40w radios) 287 © tait electronics limitedaugust 2005 task 22 — directional coupler and buffer amplifiers following the checks in task 19 to task 21 , locate the fault and repair the circuitry as described in the remaining tasks of the section. In...

  • Page 288

    288 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 11. Repair any fault revealed by the above checks. Replace ic303 if none of the other components is faulty (see figure 11.11 and figure 11.12 ). 12. Confirm the removal of the fault and go to “...

  • Page 289

    Tm9100 service manual transmitter fault finding (50w/40w radios) 289 © tait electronics limitedaugust 2005 figure 11.19 components of concern on the bottom-side of the main board (h5 and h7 bands) h5, h7 bands c319 r341 r340 r396 copper plate vco bot can.

  • Page 290

    290 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 24 — power control in this task any faults in the power-control circuitry will be located: 1. Measure the voltage at pin 8 of ic303 (see figure 11.11 and figure 11.12 ) in the power-contro...

  • Page 291

    Tm9100 service manual transmitter fault finding (50w/40w radios) 291 © tait electronics limitedaugust 2005 task 25 — shaping filter in this task any faults in the shaping-filter circuitry will be located. 1. With the radio still in transmit mode, measure the voltage at pin 1 of ic301 (see figure 11....

  • Page 292: 11.4

    292 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 11.4 rf signal path introduction the rf signal path extends from the output of the frequency synthesizer to the lpf. This section of circuitry will require investigation either following certai...

  • Page 293

    Tm9100 service manual transmitter fault finding (50w/40w radios) 293 © tait electronics limitedaugust 2005 task 26 — output of frequency synthesizer the first point to check in the initial rf signal path is the output syn tx lo from the frequency synthesizer. This signal is input to the exciter at c...

  • Page 294

    294 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.21 pa driver circuitry under the pad top can (b1 band) pad top q306 c3500 c3505 c3509 c307 q3501 q3504 q3502 q3505 r3525 output of pa driver output of stage 3 of exciter at c307 outpu...

  • Page 295

    Tm9100 service manual transmitter fault finding (50w/40w radios) 295 © tait electronics limitedaugust 2005 figure 11.22 pa driver circuitry under the pad top can (h5 and h7 bands) pad top q3504 c317 c389 q306 c3500 c3505 c3509 c307 q3501 q3502 q3505 h5, h7 bands output of pa driver output of stage 3...

  • Page 296

    296 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 table 11.8 rf voltages along the initial rf signal path of the vhf radio (b1 band) power level (w) frequency (mhz) rf voltages (v) synthesizer output exciter stage 1 exciter stage 2 exciter sta...

  • Page 297

    Tm9100 service manual transmitter fault finding (50w/40w radios) 297 © tait electronics limitedaugust 2005 table 11.10 rf voltages along the initial rf signal path of the uhf radio (h7 band) power level (w) frequency (mhz) rf voltages (v) synthesizer output exciter stage 1 exciter stage 2 exciter st...

  • Page 298

    298 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 27 — output of first stage of exciter if the synthesizer output is correct, check the output at c3505 of the first stage of the exciter circuit. 1. If not already done, remove the pad top ...

  • Page 299

    Tm9100 service manual transmitter fault finding (50w/40w radios) 299 © tait electronics limitedaugust 2005 task 28 — output of second stage of exciter if the output of the first stage of the exciter circuit is correct, check that of the second stage at c3509: 1. With the radio still in transmit mode...

  • Page 300

    300 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 29 — output of third stage of exciter if the output of the second stage of the exciter circuit is correct, check that of the third and final stage at c307. 1. With the radio still in trans...

  • Page 301

    Tm9100 service manual transmitter fault finding (50w/40w radios) 301 © tait electronics limitedaugust 2005 task 30 — output of pa driver if the exciter output is correct, check the output of the pa driver at the drain of q306. If necessary, also check the signal at the gates of the pas q309 and q310...

  • Page 302

    302 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.23 components of the interstage matching circuitry between the pa driver q306 and the pas q309 and q310 (b1 band) b1 band q310 q309 q306 paf top can pad top can.

  • Page 303

    Tm9100 service manual transmitter fault finding (50w/40w radios) 303 © tait electronics limitedaugust 2005 figure 11.24 components of the interstage matching circuitry between the pa driver q306 and the pas q309 and q310 (h5 and h7 bands) h5, h7 bands q310 q309 q306 paf top can pad top can.

  • Page 304

    304 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 31 — check power at directional coupler if, as determined in task 26 to task 30 , there is no fault in the initial rf signal path, investigate the final signal path. This part of the circu...

  • Page 305

    Tm9100 service manual transmitter fault finding (50w/40w radios) 305 © tait electronics limitedaugust 2005 figure 11.25 circuitry under the dirc top can, and the points for attaching the test lead and test capacitor (b1 band) b1 band c348 c349 c350 test pad mounting point for test capacitor.

  • Page 306

    306 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.26 circuitry under the dirc top can, and the points for attaching the test lead and test capacitor (h5 and h7 bands) h5, h7 bands c348 c349 c350 test pad mounting point for test capac...

  • Page 307

    Tm9100 service manual transmitter fault finding (50w/40w radios) 307 © tait electronics limitedaugust 2005 task 32 — repair circuitry if the rf output power measured in task 31 is low, there is a fault in the circuit between the common drain of the pas and the test capacitor. 1. If not already done,...

  • Page 308

    308 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 33 — check pin switch in checking the final rf signal path, if no fault is found in the directional coupler, then check the pin switch next. The pin switch may also require investigation f...

  • Page 309

    Tm9100 service manual transmitter fault finding (50w/40w radios) 309 © tait electronics limitedaugust 2005 figure 11.27 circuitry under the pin top can, and points for attaching the test lead and test capacitor h5, h7 bands b1 band c361 c362 c363 d307 c361 c362 c363 d3507 test pad test pad mounting ...

  • Page 310

    310 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 34 — repair pin switch if the rf power at the pin switch is low, the switch is not drawing the expected current or the diode is faulty. Check the circuit as follows: 1. Remove the pin top ...

  • Page 311

    Tm9100 service manual transmitter fault finding (50w/40w radios) 311 © tait electronics limitedaugust 2005 figure 11.28 components of concern on the bottom-side of the main board (b1 band) b1 band r389 r390 nb bot can copper plate vco bot can.

  • Page 312

    312 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 11.29 components of concern on the bottom-side of the main board (h5 and h7 bands) h5, h7 bands r3000 r389 r390 copper plate vco bot can.

  • Page 313

    Tm9100 service manual transmitter fault finding (50w/40w radios) 313 © tait electronics limitedaugust 2005 figure 11.30 circuitry under the lpf top can b1 band h5, h7 bands.

  • Page 314

    314 transmitter fault finding (50w/40w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 35 — check components of lpf if there are no faults in the final rf signal path up to and including the pin switch, then the fault should lie in the lpf. Check the lpf as follows: 1. If no...

  • Page 315

    Tm9100 service manual transmitter fault finding (25w radios) 315 © tait electronics limitedaugust 2005 12 transmitter fault finding (25w radios) introduction this section covers the diagnosis of faults in the transmitter circuitry for the 25 w radios. The main indication of a fault in the transmitte...

  • Page 316

    316 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 frequency bands some fault-diagnosis tasks require programming the radio with the lowest, center or highest frequency in the radio’s frequency band. The relevant frequencies for the different bands...

  • Page 317

    Tm9100 service manual transmitter fault finding (25w radios) 317 © tait electronics limitedaugust 2005 transmit tests the following points need to be borne in mind when carrying out transmit tests: ■ secure main-board assembly ■ ensure proper antenna load ■ limit duration of transmit tests ■ protect...

  • Page 318: 12.1

    318 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 12.1 power supplies introduction first check that a power supply is not the cause of the fault. There are two power supplies and a switch circuit for the transmitter: ■ task 1 : 13.8v dc supply fro...

  • Page 319

    Tm9100 service manual transmitter fault finding (25w radios) 319 © tait electronics limitedaugust 2005 task 1 — 13.8v power supply first check the power supply from the power connector. 1. Obtain a needle probe to use for measurements of the power supply at the pa driver and pas. If none is availabl...

  • Page 320

    320 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.2 point for measuring the power supply to the pas h5, h6 bands b1 band measurement point on l310 (b1 band similar).

  • Page 321

    Tm9100 service manual transmitter fault finding (25w radios) 321 © tait electronics limitedaugust 2005 figure 12.3 point for measuring the power supply to the pa driver r324 c310 h5, h6 bands b1 band measurement point on l306 measurement point on l306 l306 point 2 on r350 point 2 on r350 point 1 on ...

  • Page 322

    322 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 2 — check switch circuit if the power supply to the drains of the pas and pa driver is not correct, the switch circuit is suspect. Check the circuit as follows: 1. Measure the voltage at the p...

  • Page 323

    Tm9100 service manual transmitter fault finding (25w radios) 323 © tait electronics limitedaugust 2005 figure 12.4 test points for checking the 9v supply, the forward and reverse rf power, and the inhibiting of the transmitter dirc top can if top can vco top can (uhf only) d tx inh test point tx inh...

  • Page 324: 12.2

    324 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 12.2 transmitter rf power introduction if there is no fault with the power supplies, check the transmitter rf power and correct any fault. The procedure is covered in the following eight tasks: ■ t...

  • Page 325

    Tm9100 service manual transmitter fault finding (25w radios) 325 © tait electronics limitedaugust 2005 figure 12.5 measurement and test points for diagnosing faults concerning the transmitter rf power rev pwr test point rev pwr test point fwd pwr test point fwd pwr test point lead t o test set lead ...

  • Page 326

    326 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 4 — check forward and reverse powers first check the forward and reverse powers for an indication of which part of the circuitry is suspect. 1. Enter the cctm command 326 4 to set the transmit...

  • Page 327

    Tm9100 service manual transmitter fault finding (25w radios) 327 © tait electronics limitedaugust 2005 task 5 — check rf output power if the power supplies are correct, check the rf output power of the transmitter. 1. Enter the cctm command 326 5 to set the transmitter power level to the maximum val...

  • Page 328

    328 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 6 — power unchanged regardless of setting if all the power and current values measured in task 5 are correct, it is likely that the power remains unchanged regardless of the power setting. 1. ...

  • Page 329

    Tm9100 service manual transmitter fault finding (25w radios) 329 © tait electronics limitedaugust 2005 12. Repair any fault, confirm the removal of the fault, and go to “final tasks” on page 147 . If the repair failed or no fault could be found, replace the main-board assembly and go to “final tasks...

  • Page 330

    330 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.6 pa circuitry under the paf top can and part of the directional coupler under the dirc top can (b1 band) mounting point for test capacitor test pad temperature sensor.

  • Page 331

    Tm9100 service manual transmitter fault finding (25w radios) 331 © tait electronics limitedaugust 2005 figure 12.7 pa circuitry under the paf top can and part of the directional coupler under the dirc top can (h5 and h6 bands) mounting point for test capacitor test pad temperature sensor.

  • Page 332

    332 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 9 — power and current are skewed if the rf output power and the supply current are skewed, the output matching is suspect. 1. Remove the dirc top can. 2. Remove the coupling capacitors c348, c...

  • Page 333

    Tm9100 service manual transmitter fault finding (25w radios) 333 © tait electronics limitedaugust 2005 task 10 — repair output matching circuitry if the checks in task 9 show that the power and current are still skewed, there is a fault in the output matching circuitry. 1. If not already done, remov...

  • Page 334

    334 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 11 — power and current are low if the rf output power and the supply current are uniformly low at all frequencies, one of the pas is suspect or the input to the pas is reduced. Check each pa i...

  • Page 335: 12.3

    Tm9100 service manual transmitter fault finding (25w radios) 335 © tait electronics limitedaugust 2005 12.3 biasing of pa driver and pas introduction the measurements of the transmitter rf output power in “transmitter rf power” might indicate a need to check the biasing of the two pas and the pa dri...

  • Page 336

    336 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.8 measurement and test points for diagnosing faults in the biasing of the pas and pa driver pin switch and lpf r336 r347 direc- tional coupler pa s b uffer amplifier b uffer amplifier po ...

  • Page 337

    Tm9100 service manual transmitter fault finding (25w radios) 337 © tait electronics limitedaugust 2005 task 13 — check biasing of first pa check the biasing of the first pa (q310). Important ensure that the current limit on the dc supply is 2 a. And, when entering the cctm command 331 x, do not spec...

  • Page 338

    338 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.9 test points and components of the shaping filter dirc top can if top can vco top can (uhf only) set pwr test point fwd pwr test point pwr test point fin1 test point fin2 test point drv ...

  • Page 339

    Tm9100 service manual transmitter fault finding (25w radios) 339 © tait electronics limitedaugust 2005 task 14 — shaper and level shifter if the voltage measured in task 13 is correct but not the current, either the first pa or the shaper and level shifter for the pa is suspect. Important ensure tha...

  • Page 340

    340 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.10 pa circuitry under the paf top can h5, h6 bands b1 band cicuitry between ic301 and pas (h5 and h6 bands similar) via to gate of q309 via to gate of q310 via to pin 14 of ic301 via to p...

  • Page 341

    Tm9100 service manual transmitter fault finding (25w radios) 341 © tait electronics limitedaugust 2005 task 15 — shaping filter for power control if neither the voltage nor the current measured in task 13 is correct, then the shaping filter for the power-control circuitry or the codec and audio circ...

  • Page 342

    342 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 16 — check biasing of second pa if the biasing of the first pa is correct, check that of the second pa (q309). Important ensure that the current limit on the dc supply is 2a. And, when enterin...

  • Page 343

    Tm9100 service manual transmitter fault finding (25w radios) 343 © tait electronics limitedaugust 2005 task 17 — shaper and level shifter if the voltage measured in task 16 is correct but not the current, either the second pa or the shaper and level shifter for the pa is suspect. Important ensure th...

  • Page 344

    344 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 18 — shaping filter for power control if neither the voltage nor the current measured in task 16 is correct, then the shaping filter for the power-control circuitry or the codec and audio circ...

  • Page 345

    Tm9100 service manual transmitter fault finding (25w radios) 345 © tait electronics limitedaugust 2005 task 19 — biasing of pa driver— drv test point if there is no fault in the biasing of the pas, investigate the biasing of the pa driver (q306). First check the drv test point. Important ensure that...

  • Page 346

    346 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 20 — biasing of pa driver— set pwr test point if the voltage at the drv test point is correct, check that at the set pwr test point. 1. Check the voltage at the set pwr test point (see figure ...

  • Page 347

    Tm9100 service manual transmitter fault finding (25w radios) 347 © tait electronics limitedaugust 2005 figure 12.11 pa driver circuitry under the pad top can gate of q306 h5, h6 bands b1 band components c310, r324, r327 components c310, r324, r327 gate of q306.

  • Page 348

    348 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 21 — check power control check the power-control circuitry if the clamp current for the pa driver is correct or if the voltage at the set pwr test point is incorrect. Important ensure that the...

  • Page 349

    Tm9100 service manual transmitter fault finding (25w radios) 349 © tait electronics limitedaugust 2005 figure 12.12 circuitry under the dirc top can b1 band h5/h6 bands.

  • Page 350

    350 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 22 — directional coupler and buffer amplifier following the checks in task 19 to task 21 , locate the fault and repair the circuitry as described in the remaining tasks of the section. In this...

  • Page 351

    Tm9100 service manual transmitter fault finding (25w radios) 351 © tait electronics limitedaugust 2005 13. Confirm the removal of the fault and go to “final tasks” on page 147 . If the repair failed, replace the main-board assembly and go to “final tasks” on page 147 . Task 23 — power control for pa...

  • Page 352

    352 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.13 components of concern on the bottom-side of the main board b1 band h5/h6 bands.

  • Page 353

    Tm9100 service manual transmitter fault finding (25w radios) 353 © tait electronics limitedaugust 2005 task 24 — power control and shaping filter in this task any faults in the power-control and shaping-filter circuitry will be located: 1. Measure the voltage at pin 8 of ic303 (see figure 12.9 ) in ...

  • Page 354: 12.4

    354 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 12.4 rf signal path introduction the rf signal path extends from the output of the frequency synthesizer to the lpf. This section of circuitry will require investigation either following certain ch...

  • Page 355

    Tm9100 service manual transmitter fault finding (25w radios) 355 © tait electronics limitedaugust 2005 task 25 — output of frequency synthesizer the first point to check in the initial rf signal path is the output syn tx lo from the frequency synthesizer. This signal is input to the exciter at c300....

  • Page 356

    356 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.15 pa driver circuitry under the pad top can h5, h6 bands synthesizer output at c300 buffer output at c313 synthesizer output at c300 buffer output at c313 exciter output at c301 exciter ...

  • Page 357

    Tm9100 service manual transmitter fault finding (25w radios) 357 © tait electronics limitedaugust 2005 table 12.8 rf voltages along the initial rf signal path of the vhf radio (b1 band) power level (w) frequency (mhz) rf voltages (v) synthesizer output buffer output exciter output driver output 1 13...

  • Page 358

    358 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 26 — output of buffer in exciter circuit if the synthesizer output is correct, check the output at c313 of the buffer amplifier in the exciter circuit. 1. If not already done, remove the pad t...

  • Page 359

    Tm9100 service manual transmitter fault finding (25w radios) 359 © tait electronics limitedaugust 2005 task 28 — output of pa driver if the exciter output is correct, check the output of the pa driver at the drain of q306. If necessary, also check the signal at the gates of the pas q309 and q310. Th...

  • Page 360

    360 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.16 components of the interstage matching circuitry between the pa driver q306 and the pas q309 and q310 b1 band h5, h6 bands paf top can pad top can.

  • Page 361

    Tm9100 service manual transmitter fault finding (25w radios) 361 © tait electronics limitedaugust 2005 task 29 — check power at directional coupler if, as determined in task 25 to task 28 , there is no fault in the initial rf signal path, investigate the final signal path. This part of the circuitry...

  • Page 362

    362 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.17 circuitry under the dirc top can, and the points for attaching the test lead and test capacitor b1 band h5/h6 bands mounting point for test capacitor test pad test pad.

  • Page 363

    Tm9100 service manual transmitter fault finding (25w radios) 363 © tait electronics limitedaugust 2005 task 30 — repair circuitry if the rf output power measured in task 29 is low, there is a fault in the circuit between the common drain of the pas and the test capacitor. 1. If not already done, rem...

  • Page 364

    364 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 31 — check pin switch in checking the final rf signal path, if no fault is found in the directional coupler, then check the pin switch next. The pin switch may also require investigation follo...

  • Page 365

    Tm9100 service manual transmitter fault finding (25w radios) 365 © tait electronics limitedaugust 2005 figure 12.18 circuitry under the pin top can, and points for attaching the test lead and test capacitor b1 band h5/h6 bands mounting point for test capacitor test pad test pad.

  • Page 366

    366 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 task 32 — repair pin switch if the rf power at the pin switch is low, the switch is not drawing the expected current or the diode is faulty. Check the circuit as follows: 1. Perform a diode check o...

  • Page 367

    Tm9100 service manual transmitter fault finding (25w radios) 367 © tait electronics limitedaugust 2005 figure 12.19 components of concern on the bottom-side of the main board b1 band copper plate vco bot can nb bot can copper plate vco bot can h5, h6 bands.

  • Page 368

    368 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005 figure 12.20 circuitry under the lpf top can (top side) b1 band h5/h6 bands.

  • Page 369

    Tm9100 service manual transmitter fault finding (25w radios) 369 © tait electronics limitedaugust 2005 task 33 — check components of lpf if there are no faults in the final rf signal path up to and including the pin switch, then the fault should lie in the lpf. Check the lpf as follows: 1. Remove th...

  • Page 370

    370 transmitter fault finding (25w radios) tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 371

    Tm9100 service manual codec and audio fault finding 371 © tait electronics limitedaugust 2005 13 codec and audio fault finding fault conditions this section covers the diagnosis of faults in the codec and audio circuitry. There are five conditions that indicate a possible fault in the circuitry: ■ n...

  • Page 372: 13.1

    372 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 13.1 power supplies introduction first check that a power supply is not the cause of the fault. Of these supplies, the 3.3 v dc supply (+3 v 3) will already have been checked in “power supply fault finding”...

  • Page 373

    Tm9100 service manual codec and audio fault finding 373 © tait electronics limitedaugust 2005 figure 13.1 power-supply circuitry for the codec and audio circuitry under the cdc bot can lo2 bot can can for digital board.

  • Page 374

    374 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 3 — 2.5v power supply if the 9v and 3 v supplies are correct, the remaining power supply to check is the 2.5v dc supply (+2 v 5 cdc ). 1. Measure the voltage +2 v 5 cdc at pin 5 of ic604 (see figure 13...

  • Page 375: 13.2

    Tm9100 service manual codec and audio fault finding 375 © tait electronics limitedaugust 2005 13.2 faulty speaker audio introduction this section covers the case where the green status led is operating correctly and all unmute criteria are satisfied, but there is either no speaker audio or the speak...

  • Page 376

    376 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 4 — check audio power amplifier if there is no fault with the power supplies, check the inputs to the audio pa as follows. This check is only applicable, however, if the output of the voice- band codec...

  • Page 377

    Tm9100 service manual codec and audio fault finding 377 © tait electronics limitedaugust 2005 task 5 — check speaker outputs if the inputs to the audio pa are not faulty, check the speaker outputs from the pa. 1. Check the positive and negative speaker outputs aud itf spk + and aud itf spk – at pins...

  • Page 378

    378 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 13.3 circuitry under the cdc top can, and adjacent interface circuitry junc tion of r234 a nd r235 junct ion of r 7 08 a nd c706.

  • Page 379

    Tm9100 service manual codec and audio fault finding 379 © tait electronics limitedaugust 2005 task 6 — check itf vol wip dc input signal if the output of the voice-band codec is correct, but the signal level does not vary as the volume control is varied, check the itf vol wip dc signal. 1. Check the...

  • Page 380

    380 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 13.4 circuitry under the cdc bot can lo2 bot can can for digital board junction of r218 and ic204 cdc aud tap out.

  • Page 381

    Tm9100 service manual codec and audio fault finding 381 © tait electronics limitedaugust 2005 task 7 — check itf rx beep in input signal if the output of the voice-band codec is not correct, check the itf rx beep in signal. 1. If not already done, remove the cdc bot can. 2. Check the signal at the j...

  • Page 382: 13.3

    382 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 13.3 no speaker audio at auxiliary connector introduction this section covers the case where the receiver operates normally but there is no speaker audio at the auxiliary connector. In other words, there is...

  • Page 383

    Tm9100 service manual codec and audio fault finding 383 © tait electronics limitedaugust 2005 task 8 — check signal from codec first generate an appropriate audio test signal and check whether the signal is present at the output of the codec circuitry. 1. Enter the cctm command 400 x, where x is a v...

  • Page 384

    384 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 13.6 circuitry in the vicinity of the auxiliary connector (bottom side) auxiliary connector sk101.

  • Page 385

    Tm9100 service manual codec and audio fault finding 385 © tait electronics limitedaugust 2005 task 9 — check lpf and buffer amplifier if there is no test signal at the internal-options connector, then either codec 1 is faulty or there is a fault in the lpf or buffer amplifier. 1. Remove the cdc bot ...

  • Page 386

    386 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 13.7 circuitry under the cdc bot can lo2 bot can can for digital board junction of r224 and ic204.

  • Page 387: 13.4

    Tm9100 service manual codec and audio fault finding 387 © tait electronics limitedaugust 2005 13.4 faulty receiver introduction this section covers the case where the receiver does not operate, although there is no apparent fault in the receiver circuit itself. There are two tasks: ■ task 10 : check...

  • Page 388

    388 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 figure 13.8 circuitry in the vicinity of the cdc top can b1 band h5/h6 bands junction of c708 and c732 junction of c708 and c732.

  • Page 389

    Tm9100 service manual codec and audio fault finding 389 © tait electronics limitedaugust 2005 task 11 — check qn test point if the level shifter is not faulty, check the signal at the qn test point. This will ascertain whether the digital board, codec 1, or the receiver is at fault. 1. Use the progr...

  • Page 390: 13.5

    390 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 13.5 faulty modulation introduction this section covers the case where the radio transmits the correct amount of rf power, but there is either no modulation or the modulation is distorted. There are three t...

  • Page 391

    Tm9100 service manual codec and audio fault finding 391 © tait electronics limitedaugust 2005 figure 13.9 circuitry in under the cdc bot can lo2 bot can can for digital board.

  • Page 392

    392 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 task 13 — check 2.3v supply if the ch mic aud signal is not as expected, the 2.3v supply needs to be checked. 1. If not already done, remove the cdc bot can. 2. Check the voltage across c202 (see figure 13....

  • Page 393

    Tm9100 service manual codec and audio fault finding 393 © tait electronics limitedaugust 2005 figure 13.10 circuitry under the cdc top can itf aud tap in junction of r237 and r241 junction of r229 and r232.

  • Page 394: 13.6

    394 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005 13.6 faulty modulation using auxiliary connector introduction this section covers the case where the transmitter operates normally but there is no modulation (although there is modulation at the auxiliary c...

  • Page 395

    Tm9100 service manual codec and audio fault finding 395 © tait electronics limitedaugust 2005 task 16 — check codec 2 device if the dc offset measured in task 15 is incorrect but there is no fault with the auxiliary connector, check the codec 2 device. 1. Remove the cdc top can. 2. Check the voltage...

  • Page 396

    396 codec and audio fault finding tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 397

    Tm9100 service manual fault finding of control head 397 © tait electronics limitedaugust 2005 14 fault finding of control head overview this section describes the fault finding of the control head for the following faults: ■ power supply faulty (initial check) ■ lcd display faulty ■ lcd backlighting...

  • Page 398: 14.1

    398 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.1 cctm commands the following cctm commands are used during the fault finding of the control head: table 14.1 cctm commands for fault finding of the control head cctm command entry at keyboard response o...

  • Page 399

    Tm9100 service manual fault finding of control head 399 © tait electronics limitedaugust 2005 the following cctm commands are used during the fault finding of the remote control-head kit: table 14.2 cctm commands for fault finding of the remote control-head kit cctm command entry at keyboard respons...

  • Page 400: 14.2

    400 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.2 power supply faulty a 3.3 v regulator (u1) converts the switched 13.8v supply from the radio body to 3.3 v. A 1.5 v regulator (u203) converts the 3.3 v to 1.5v. A power-sense module (u202) verifies the...

  • Page 401

    Tm9100 service manual fault finding of control head 401 © tait electronics limitedaugust 2005 if the signal is not correct, check the 13.8v supply voltage from the radio body. Return to step 1 . 3. Check the inhibit signal at pin 3 of u1. If the signal is above 2.2 v, visually inspect the components...

  • Page 402: 14.3

    402 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.3 lcd display faulty the lcd module is connected to the control-head board via the lcd connector. The lcd module display is controlled by a serial data link to the fpga. A faulty lcd display can be cause...

  • Page 403

    Tm9100 service manual fault finding of control head 403 © tait electronics limitedaugust 2005 2. Check the 3.3v supply voltage at pin 2 of the lcd connector j102. If the signal is not correct, refer to “power supply faulty” on page 400 . Tip for a quick check of the lcd without having to disassemble...

  • Page 404: 14.4

    404 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.4 lcd backlighting faulty the backlighting incorporated in the lcd module is controlled by a data line from the fpga, which switches a transistor on mosfet q102. Note the lcd backlighting has four bright...

  • Page 405: 14.5

    Tm9100 service manual fault finding of control head 405 © tait electronics limitedaugust 2005 14.5 lcd heating faulty the heating incorporated in the lcd module is controlled by a data line from the fpga, which switches a transistor on mosfet q102. A temperature signal from the lcd module is convert...

  • Page 406: 14.6

    406 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.6 function key leds or status leds faulty the function key leds (f1 and f4) and the red, green and amber status leds each are controlled by an fpga signal and a transistor (q604 to q608). The brightness ...

  • Page 407

    Tm9100 service manual fault finding of control head 407 © tait electronics limitedaugust 2005 3. Check the resistors r601 and r602, and replace if necessary. If the resistors are okay, the fpga is faulty and the control-head board must be replaced. R601: 2.2k Ω r602: 5.62k Ω figure 14.6 pcb layout o...

  • Page 408: 14.7

    408 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.7 keypad backlighting faulty the keypad backlighting leds are controlled by two fpga signals and two transistors (q2), resulting in four intensity levels (off, low, medium and high). The keypad backlight...

  • Page 409

    Tm9100 service manual fault finding of control head 409 © tait electronics limitedaugust 2005 2. With the intensity set to high, check the signals at pins 2 (b1) and 5 (b2) of q2. If any of these signals are incorrect, the fpga is faulty and the con- trol-head board must be replaced. 3. Check the si...

  • Page 410: 14.8

    410 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.8 on/off key faulty when battery power (13.8v) is applied to the radio, a press of the on / off key will create an active low signal ( ch on off ) back to the radio body to initiate the power-on or power...

  • Page 411

    Tm9100 service manual fault finding of control head 411 © tait electronics limitedaugust 2005 figure 14.10 pcb layout of the power on/off key circuitry top side bottom side.

  • Page 412: 14.9

    412 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.9 function, scroll, or selection keys faulty the eight keys of the main keypad (function, scroll, and selection keys) are connected to the fpga by an array of three columns and three rows. During idle op...

  • Page 413

    Tm9100 service manual fault finding of control head 413 © tait electronics limitedaugust 2005 several keys faulty the keys can be grouped into columns and rows of three or two keys, as illustrated in figure 14.11 . If one column of keys is faulty: 1. Visually inspect the associated resistor and diod...

  • Page 414: 14.10 Speaker Faulty

    414 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.10 speaker faulty the two speaker lines (spk+ and spk–) are connected to the speaker connector (j104) which is connected to the control-head connector (j103) through two ferrite beads (l105 and l106). If...

  • Page 415

    Tm9100 service manual fault finding of control head 415 © tait electronics limitedaugust 2005 figure 14.14 pcb layout of the speaker circuitry top side bottom side.

  • Page 416: 14.11 Volume Control Faulty

    416 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.11 volume control faulty the voltage level of the volume control potentiometer is converted to a digital signal by an analog/digital converter, processed by the fpga and transmitted to the main board. No...

  • Page 417

    Tm9100 service manual fault finding of control head 417 © tait electronics limitedaugust 2005 figure 14.16 pcb layout of the volume control circuitry top side bottom side.

  • Page 418: 14.12 Ptt Faulty

    418 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005 14.12 ptt faulty the ptt signal from the microphone connector is connected to the fpga via a resistor (r25) and relayed to the radio as a digital command. Note this section only describes faults to the ptt ...

  • Page 419

    Tm9100 service manual fault finding of control head 419 © tait electronics limitedaugust 2005 figure 14.18 pcb layout of ptt circuitry top side bottom side.

  • Page 420

    420 fault finding of control head tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 421: Spare Parts

    Tm9100 service manual spare parts 421 © tait electronics limitedaugust 2005 15 spare parts introduction this section lists all serviceable parts (except pcb components) of the ■ radio body ( figure 15.1 , figure 15.2 , and table 15.1 ) ■ control head ( figure 15.3 and table 15.2 ) figure 15.1 spare ...

  • Page 422

    422 spare parts tm9100 service manual © tait electronics limitedaugust 2005 figure 15.2 spare parts of the radio body (sheet 2 of 2) g 1$ 2) x3 3641z_01 1# x2 1( 1% 2@ 1^ 2! X2 1& 1*.

  • Page 423

    Tm9100 service manual spare parts 423 © tait electronics limitedaugust 2005 table 15.1 spare parts of the radio body pos. Description qty. Ipn spares kit b cover 1 – tmaa22-02 mech. Kit c screw m4 x 16 6 349-02067-xx tmaa22-02 mech. Kit d lid 1 312-01091-xx – e bung for aperture for external options...

  • Page 424

    424 spare parts tm9100 service manual © tait electronics limitedaugust 2005 figure 15.3 spare parts of the control head c e f g g 1) h i j 1! 1^ 1@ 1# 1$ 1& x2 x4 d 3451z_02 b 1%.

  • Page 425

    Tm9100 service manual spare parts 425 © tait electronics limitedaugust 2005 table 15.2 spare parts of the control head pos. Description qty. Ipn spares kit a b m4 x 12 taptite screw 2 349-02058-xx tmaa22-97 c adaptor flange 1 349-02067-xx 301-00020-xx tmaa22-97 d control-head loom (with female-femal...

  • Page 426

    426 spare parts tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 427

    Tm9100 service manual 427 © tait electronics limitedaugust 2005 tm9100 mobiles chapter 3 accessories.

  • Page 428: Chapter 3 – Contents

    428 tm9100 service manual © tait electronics limitedaugust 2005 chapter 3 – contents 16 tmaa02-08 keypad microphone . . . . . . . . . . . . . . . . . . . . . . . . . . .431 16.1 operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431 16.2 installati...

  • Page 429

    Tm9100 service manual 429 © tait electronics limitedaugust 2005 22 tmaa10-04 remote ptt kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .455 22.1 installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455 22.2 radio programming . . . . ...

  • Page 430

    430 tm9100 service manual © tait electronics limitedaugust 2005.

  • Page 431: Tmaa02-08 Keypad Microphone

    Tm9100 service manual tmaa02-08 keypad microphone 431 © tait electronics limited august 2005 16 tmaa02-08 keypad microphone the tmaa02-08 keypad microphone plugs into the microphone socket on the graphical-display radio control head, and enables users to make calls to other radios, groups, or to a p...

  • Page 432

    432 tmaa02-08 keypad microphone tm9100 service manual © tait electronics limited august 2005 3. Once the channel is clear (the green led is off), lift the microphone off the microphone clip. 4. Hold the microphone about 5cm (2 inches) from your mouth and press the ptt key to transmit. 5. Speak clear...

  • Page 433: 16.2

    Tm9100 service manual tmaa02-08 keypad microphone 433 © tait electronics limited august 2005 9. Speak clearly into the microphone and release the ptt key when you have finished talking. 16.2 installation 16.2.1 installing the microphone important the keypad microphone grommet must be installed when-...

  • Page 434: 16.3

    434 tmaa02-08 keypad microphone tm9100 service manual © tait electronics limited august 2005 16.3 radio programming the radio does not need to be programmed to recognize the presence of a keypad microphone, as this is automatically done when the radio is powered on. However, there are a few related ...

  • Page 435: 16.6

    Tm9100 service manual tmaa02-08 keypad microphone 435 © tait electronics limited august 2005 16.6 pcb information note the ipn number on the actual pcb for the keypad microphone may differ to that shown in the following information. 16.6.1 tmaa02-08 parts list (pcb ipn 226-00145-04) c1 018-16100-00 ...

  • Page 436

    436 tmaa02-08 keypad microphone tm9100 service manual © tait electronics limited august 2005 16.6.2 tmaa02-08 grid reference list (pcb ipn 226-00145-04) top side components y1 h5 1g10 u2 g4 1k13 u1 h5 1g9 s9 d4 1f3 s8 c3 1e2 s7 c4 1f2 s6 c5 1f2 s5 c6 1g2 s4 a3 1e1 s3 a4 1f1 s2 a5 1f1 s18 f4 1j7 s16 ...

  • Page 437

    Tm9100 service manual tmaa02-08 keypad microphone 437 © tait electronics limited august 2005 16.6.3 keypad microphone board layout ipn 226-00145-04 (top side) ipn 226-00145-04 (bottom side).

  • Page 438

    438 tmaa02-08 keypad microphone tm9100 service manual © tait electronics limited august 2005 16.6.4 keypad microphone board circuit diagram.

  • Page 439: Tmaa03-02 Security Bracket

    Tm9100 service manual tmaa03-02 security bracket 439 © tait electronics limited august 2005 17 tmaa03-02 security bracket the tmaa03-02 security bracket can be used in place of the standard u-bracket in locations where you want to stop opportunistic removal of the radio by a third party, or where yo...

  • Page 440: 17.1

    440 tmaa03-02 security bracket tm9100 service manual © tait electronics limited august 2005 17.1 installing the security bracket and radio 17.2 installation planning before installing the security bracket, make sure that the site you have chosen for the installation meets the following criteria: 1. ...

  • Page 441: 17.3

    Tm9100 service manual tmaa03-02 security bracket 441 © tait electronics limited august 2005 4. If the slide locks are closed, open them by inserting the slide lock key into the keyhole. Rotate the key 90° (it will slip into a detent), and pull. Two slide lock keys are supplied so that you can either...

  • Page 442: 17.5

    442 tmaa03-02 security bracket tm9100 service manual © tait electronics limited august 2005 17.5 disassembling the security bracket disassemble the security bracket as follows: 1. Remove the radio from the security bracket by following the steps in “removing a radio from the security bracket” on pag...

  • Page 443: Tmaa04-05 Ignition Sense Kit

    Tm9100 service manual tmaa04-05 ignition sense kit 443 © tait electronics limitedaugust 2005 18 tmaa04-05 ignition sense kit the tmaa04-05 ignition sense kit provides a mating plug for the radio’s auxiliary connector. The four metre length of cable from pin 4 of the plug connects to the vehicle’s ig...

  • Page 444

    444 tmaa04-05 ignition sense kit tm9100 service manual © tait electronics limited august 2005.

  • Page 445: Tmaa10-01 Desktop Microphone

    Tm9100 service manual tmaa10-01 desktop microphone 445 © tait electronics limited august 2005 19 tmaa10-01 desktop microphone the tmaa10-01 desktop microphone is an omnidirectional dynamic microphone which can be used in dispatch situations, where the microphone is positioned on a flat surface. The ...

  • Page 446: 19.3

    446 tmaa10-01 desktop microphone tm9100 service manual © tait electronics limited august 2005 3. Squeeze the grommet and push the remaining corners into position. 4. Check that the grommet is seated correctly in the cavity. 19.3 adjustment adjust the output sensitivity of the desktop microphone usin...

  • Page 447: 19.5

    Tm9100 service manual tmaa10-01 desktop microphone 447 © tait electronics limited august 2005 . 19.5 circuit description the desktop microphone uses a dynamic microphone capsule and contains a pre-amplifier (q1) to boost the microphone level to that required by the radio. Power for the pre-amplifier...

  • Page 448

    448 tmaa10-01 desktop microphone tm9100 service manual © tait electronics limited august 2005.

  • Page 449: Tmaa10-02 Handset

    Tm9100 service manual tmaa10-02 handset 449 © tait electronics limited august 2005 20 tmaa10-02 handset the tmaa10-02 handset provides the user with privacy and also improves the audio quality in noisy environments. The handset uses a dynamic microphone capsule, so for tm8100 radios, the tmaa02-06 s...

  • Page 450

    450 tmaa10-02 handset tm9100 service manual © tait electronics limited august 2005 20.1.2 handset installation 1. Press the pushbutton and remove the handset from the locking cradle. 2. Disassemble the locking cradle by removing the four locking cradle screws. 3. Screw the handset mounting plate to ...

  • Page 451

    Tm9100 service manual tmaa10-02 handset 451 © tait electronics limited august 2005 20.1.4 radio programming dynamic microphone support dynamic microphone support must be enabled in the ui preferences form of the radio’s programming application, so that audio is optomized for dynamic microphones. Ref...

  • Page 452: 20.2

    452 tmaa10-02 handset tm9100 service manual © tait electronics limited august 2005 20.2 interface specification the following table and diagram summarizes the signals used for the handset on the radio’s microphone connector and shows the interface between the handset and the radio. . Table 20.5 hand...

  • Page 453: Tmaa10-03 and Tmaa10-06

    Tm9100 service manual tmaa10-03 and tmaa10-06 high-power remote speakers 453 © tait electronics limitedaugust 2005 21 tmaa10-03 and tmaa10-06 high-power remote speakers the tmaa10-03 remote speaker (for the 25w radio) and the tmaa10-06 remote speaker (for the 50w/40 w radio) are installed in paralle...

  • Page 454

    454 tmaa10-03 and tmaa10-06 high-power remote speakers tm9100 service manual © tait electronics limitedaugust 2005 21.1.2 power connector wiring insert the remote speaker receptacles into the power connector socket, as shown in the diagrams below. Note the positive remote speaker wire has a white st...

  • Page 455: Tmaa10-04 Remote Ptt Kit

    Tm9100 service manual tmaa10-04 remote ptt kit 455 © tait electronics limited august 2005 22 tmaa10-04 remote ptt kit the tmaa10-04 remote ptt kit plugs into the radio’s auxiliary connector. This kit uses the remote electret microphone to replace communication through the usual rugged microphone. Th...

  • Page 456: 22.2 Radio Programming

    456 tmaa10-04 remote ptt kit tm9100 service manual © tait electronics limited august 2005 22.1.2 installing the remote ptt important the remote ptt must be operable from a normal driving position. 1. Secure the remote ptt in position using the velcro strap and plug the remote ptt cord into the remot...

  • Page 457: 22.3

    Tm9100 service manual tmaa10-04 remote ptt kit 457 © tait electronics limited august 2005 22.3 interface specification the following table and diagram summarizes the signals used for the remote ptt and hands-free kits on the radio’s auxiliary connector and shows the interface between the kits and th...

  • Page 458: 22.5

    458 tmaa10-04 remote ptt kit tm9100 service manual © tait electronics limited august 2005 22.5 pcb information 22.5.1 tmaa10-04 parts list (pcb ipn 220-01711-01) c2 015-26330-08 cap cer 0805 330n 5% 10v x7r c3 018-15100-00 cap 0603 10n 50v x7r +-10% c4 015-26330-08 cap cer 0805 330n 5% 10v x7r c6 01...

  • Page 459

    Tm9100 service manual tmaa10-04 remote ptt kit 459 © tait electronics limited august 2005 22.5.2 pre-amplifier board layout ipn 220-01711-01 ( bot to m s ide ) ipn 220-01711-01 ( to p s ide ).

  • Page 460

    460 tmaa10-04 remote ptt kit tm9100 service manual © tait electronics limited august 2005 22.5.3 pre-amplifier board circuit diagram.

  • Page 461: 23.1

    Tm9100 service manual installing an enhanced remote kit 461 © tait electronics limitedaugust 2005 23 installing an enhanced remote kit the control head of a graphical-display radio can be installed remotely from the radio body. The diagram below shows the parts used for this installation. Note altho...

  • Page 462

    462 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 23.1.1 overview installing the control head remotely is done in six steps: 1. Remove the control head from the radio body, if necessary. 2. Install the torso interface b onto the radio body. 3. Mount t...

  • Page 463: –

    Tm9100 service manual installing an enhanced remote kit 463 © tait electronics limitedaugust 2005 23.1.3 removing the control head from the radio body (if necessary) caution during this procedure, take care that the control- head seal is not damaged. Damage to this seal reduces environmental protect...

  • Page 464

    464 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 23.1.5 mounting the remote u-bracket the remote u-bracket with its self-drilling screws, is used to install the remote control-head assembly on the dashboard or on any sufficiently flat surface. Cautio...

  • Page 465

    Tm9100 service manual installing an enhanced remote kit 465 © tait electronics limitedaugust 2005 u-bracket), the control-head interface loom i must be moved, so that it can reach the control head connector. To move the control-head interface loom: 1. Undo the seven torx t-10 screws on the control-h...

  • Page 466

    466 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 4. Screw the u-bracket in the chosen mounting position using the self- drilling screws washers. Installing the radio body in the u-bracket 1. Connect the antenna and power cables to the rear of the rad...

  • Page 467: 23.2

    Tm9100 service manual installing an enhanced remote kit 467 © tait electronics limitedaugust 2005 23.2 circuit description figure 23.3 shows a block diagram of the remote control-head installation. Both control heads contain a circuit board with audio amplifiers and rs- 485 driver components. Figure...

  • Page 468: 23.3

    468 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 23.3 servicing the remote control-head installation parts 23.3.1 disassembling the torso interface disassemble only as much as is necessary to replace the defective parts. Re-assembly is carried out in...

  • Page 469

    Tm9100 service manual installing an enhanced remote kit 469 © tait electronics limitedaugust 2005 23.3.2 disassembling the control-head interface disassemble only as much as necessary to replace the defective parts or to swap the micromatch connector loom. Re-assembly is carried out in reverse order...

  • Page 470: 23.4

    Ref. Ipn description ref. Ipn description 470 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 23.4 pcb information 23.4.1 tmaa03-03 control-head interface (pcb ipn 220-01721-02) parts list c100 018-14101-00 cap 0603 1n 50v npo ±5% c101 018-14101-00 cap ...

  • Page 471

    Ref. Ipn description ref. Ipn description ref. Pcb circuit ref. Pcb circuit ref. Pcb circuit tm9100 service manual installing an enhanced remote kit 471 © tait electronics limitedaugust 2005 r612 038-14470-00 res 0603 4k7 1/16w +-5% r701 038-16120-00 res 0603 120k 1/16w +-5% r710 036-13100-00 res m/...

  • Page 472

    472 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 board layout ipn 220-01721-02.

  • Page 473

    Tm9100 service manual installing an enhanced remote kit 473 © tait electronics limitedaugust 2005 circuit diagram.

  • Page 474

    Ref. Ipn description ref. Ipn description ref. Pcb circuit ref. Pcb circuit ref. Pcb circuit 474 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 c1 018-16100-00 cap 0603 100n 16v x7r + - 10% c2 015-07470-10 cap cer 1206 4u7 x7r 16v c3 015-06470-01 cap c...

  • Page 475

    Tm9100 service manual installing an enhanced remote kit 475 © tait electronics limitedaugust 2005 board layout ipn 220-01720-01.

  • Page 476

    476 installing an enhanced remote kit tm9100 service manual © tait electronics limited august 2005 circuit diagram.

  • Page 477: Topa-Sv-024 Test Unit

    Tm9100 service manual topa-sv-024 test unit 477 © tait electronics limitedaugust 2005 24 topa-sv-024 test unit the topa-sv-024 test unit is used to test and maintain tait portable and mobile radios by providing an interface between the radio, a test pc, and an rf communications test set. The diagram...

  • Page 478

    478 topa-sv-024 test unit tm9100 service manual © tait electronics limitedaugust 2005 figure 24.2 test setup radio connector (db15) rf connector (mini uhf or bnc) auxiliary connector (db15) microphone connector (rj45) receive audio / sinad connector (bnc) transmit audio connector (bnc) computer conn...

  • Page 479: 24.2

    Tm9100 service manual topa-sv-024 test unit 479 © tait electronics limitedaugust 2005 24.2 operation this section explains the function of the topa-sv-024 test unit controls. The procedure for using the test unit is described in the relevant section on test equipment setup. 24.2.1 portable / mobile ...

  • Page 480

    480 topa-sv-024 test unit tm9100 service manual © tait electronics limitedaugust 2005 24.2.4 rx / tx/ptt switch this 2-way toggle switch is used to switch between receive and transmit mode. ■ when set to rx, the ptt line is switched to high impedance. ■ when set to tx/ptt, the ptt line is pulled to ...

  • Page 481: 24.3

    Tm9100 service manual topa-sv-024 test unit 481 © tait electronics limitedaugust 2005 24.3 pcb information (pcb ipn 220-01418-02a) 24.3.1 parts list (rev. 4) 24.3.2 pcb layout bnc1 240-02100-11 skt coax bnc 3.5mm pnl n/tag bnc2 240-02100-11 skt coax bnc 3.5mm pnl n/tag c1 011-54100-01 cap cer ai 1n ...

  • Page 482

    482 topa-sv-024 test unit tm9100 service manual © tait electronics limitedaugust 2005 24.3.3 circuit diagram th e com pon ent v alues in th e s chem at ic dia gr am a re in di ca tive o nly . Refer t o t he p ar ts li st fo r ac tu al v alu es us ed . S peak e r 4 Ω sp k r 8 .2 Ω sh o u ld b e d p t...

  • Page 483

    Tm9100 service manual 483 © tait electronics limitedaugust 2005 tait general software licence agreement this legal document is an agreement between you (the “licensee”) and tait electronics limited (“tait”). By using any of the software or firmware items prior-installed in the related tait product, ...

  • Page 484

    484 tm9100 service manual © tait electronics limited august 2005 limited warranty the software or firmware ( including open source components ) is supplied by tait and accepted by the licensee “ as is ” without warranty of any kind either expressed or implied , including but not being limited to any...