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  5. Detailed Service Manual

Nova PR400 Detailed Service Manual

Summary of PR400

  • Page 1

    Motorola and the stylized m logo are trademarks of motorola, inc. All other product or service names are the property of their respective owners. © 2005 motorola, inc. All rights reserved. Printed in u.S.A. *6881096c25* 6881096c25-b pr400 ™ commercial series portable radio detailed service manual.

  • Page 3: Pr400 Portable Radio

    Pr400 portable radio detailed service manual vhf 136-162 mhz vhf 146-174 mhz uhf 403-440 mhz uhf 438-470 mhz uhf 465-495 mhz motorola, inc. 1301 e. Algonquin road schaumburg, il 60196 6881096c25-b.

  • Page 4

    Ii foreword this manual is intended for use by service technicians familiar with portable two-way radios. It contains service information required for the equipment described and is current as of the printing date. Changes which occur after the printing date may be incorporated by a complete manual ...

  • Page 5: Table of Contents

    Table of contents iii 6881096c25-b june, 2005 table of contents foreword .....................................................................................................................................................Ii computer software copyrights .................................................

  • Page 6

    Iv table of contents june, 2005 6881096c25-b module 1: vhf 136-162, 146-174 mhz chapter 4 136-162 mhz vhf theory of operation ............................ 4-1 4.1 introduction ...............................................................................................................................

  • Page 7

    Table of contents v 6881096c25-b june, 2005 chapter 7 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists ................................................... 7-5 figure 7-3. Vhf (136-162 mhz) radio circuit block interconnect diagram (8486769z02-a) ........... 7-5 figure 7-4....

  • Page 8

    Vi table of contents june, 2005 6881096c25-b figure 7-35. Vhf (146-174 mhz) voltage controlled oscillator schematic diagram (8486342z13-c)............................................................................................... 7-45 figure 7-36. Vhf (146-174 mhz) transmitter and power control ...

  • Page 9

    Table of contents vii 6881096c25-b june, 2005 8.4 uhf frequency generation circuitry ............................................................................................ 8-4 8.4.1 fractional-n synthesizer ..........................................................................................

  • Page 10

    Viii table of contents june, 2005 6881096c25-b chapter 12 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists ................................................. 12-5 figure 12-3. Uhf (403-440 mhz) radio circuit block diagram (8486635z03-o).............................. 12-5 f...

  • Page 11

    Table of contents ix 6881096c25-b june, 2005 figure 12-35. Uhf (465-495 mhz) voltage controlled oscillator schematic diagram (8486634z02-o) ............................................................................................ 12-45 figure 12-36. Uhf (465-495 mhz) transmitter and power control...

  • Page 12: List of Figures

    X table of contents june, 2005 6881096c25-b list of figures figure 1-1. Programming/test cable.................................................................................................. 1-4 figure 1-2. Wiring of the connectors .....................................................................

  • Page 13

    Table of contents xi 6881096c25-b june, 2005 figure 7-32. Vhf (146-174 mhz) receiver front end schematic diagram (8486342z13-c) ........... 7-42 figure 7-33. Vhf (146-174 mhz) receiver back end schematic diagram (8486342z13-c) ............ 7-43 figure 7-34. Vhf (146-174 mhz) synthesizer schematic di...

  • Page 14

    Xii table of contents june, 2005 6881096c25-b figure 12-6. Uhf (403-440 mhz) synthesizer schematic diagram (8486635z03-o) ....................... 12-8 figure 12-7. Uhf (403-440 mhz) voltage controlled oscillator schematic diagram (8486635z03-o) ..........................................................

  • Page 15: List of Tables

    Table of contents xiii 6881096c25-b june 6, 2005 list of tables table 1-1. Recommended test equipment....................................................................................... 1-1 table 1-2. Service aids ......................................................................................

  • Page 16

    Xiv table of contents june, 2005 6881096c25-b.

  • Page 17: Chapter 1

    Chapter 1 test equipment, service aids, and service tools 1.1 test equipment table 1-1 lists test equipment required to service the pr400 radios. Table 1-1. Recommended test equipment motorola part no. Description characteristics application r2600 series system analyzer this item will substitute for...

  • Page 18

    June, 2005 6881096c24-b 1-2 test equipment, service aids, and service tools: service aids 1.2 service aids table 1-2 lists service aids recommended for working on the pr400 radios. While all of these items are available from motorola, most are standard shop equipment items, and any equivalent item c...

  • Page 19

    6881096c24-b june 6, 2005 test equipment, service aids, and service tools: service aids 1-3 0180386a78 illuminated magnifying glass with lens attachment illumination and magnification of components 0180302e51 master lens system 0180386a82 anti-static grounding kit used during all radio assembly and ...

  • Page 20

    June, 2005 6881096c24-b 1-4 test equipment, service aids, and service tools: service aids programming/test cable figure 1-1. Programming/test cable figure 1-2. Wiring of the connectors 25 position female connector 25 position male connector 36.0” cable 36.0” cable p1 p2 p3 p2 25 pin male d connector...

  • Page 21: Chapter 2

    Chapter 2 dc power distribution 2.1 dc regulation and distribution a block diagram of the dc power distribution throughout the radio is shown in figure 2-1 . Figure 2-1. Dc power distribution block diagram battery voltage enters at connector j301 and is routed through fuse f301 to become uswb+. Vr30...

  • Page 22

    June, 2005 6881096c25-b 2-2 dc power distribution: dc regulation and distribution when the radio is turned on, swb+ is present and is applied to: • transistor switch q494 (pins 1 and 6) which turns on q493 • rx audio power amplifier u490 • voltage divider r420/r421 and port pe0, a microprocessor a/d...

  • Page 23: Chapter 3

    Chapter 3 controller theory of operation 3.1 controller the controller provides the following functions: • interface with controls and indicators • serial bus control of major radio circuit blocks • encoding and/or decoding of selective signaling formats such as pl, dpl, mdc1200 and quik- call ii • ...

  • Page 24

    June, 2005 6881096c25-b 3-2 controller theory of operation: controller 3.1.1.1 memory usage radio operation is controlled by software that is stored in external flash rom memory (u404). Radio parameters and customer specific information is stored in external eeprom (u402). The operating status of th...

  • Page 25

    6881096c25-b june, 2005 controller theory of operation: controller 3-3 in order for each circuit block to respond only to the data intended for it, each peripheral has its own chip select (or chip enable) line. The device will only respond to data when its enable line is pulled low by one of the mic...

  • Page 26

    June, 2005 6881096c25-b 3-4 controller theory of operation: controller the microprocessor reset line (pin 94) can be controlled directly by the digital 3.3 v regulator (u320 pin 7), the microphone jack (part of accessory connector j471) via q472 and q471, and the microprocessor itself. U320 pulls th...

  • Page 27

    6881096c25-b june, 2005 controller theory of operation: controller 3-5 • 2.5 volt dc reference source • microprocessor clock generation (from the 16.8 mhz reference oscillator input) the parameters of u451 that are programmable are selected by the microprocessor via the clock (u451 pin 21), data (u4...

  • Page 28

    June, 2005 6881096c25-b 3-6 controller theory of operation: controller 3.1.2.5 vox operation vox audio accessories do not have a ptt switch. Instead, the mic cartridge is wired directly from j471-4 to ground. If the radio has been programmed for vox operation and the vox accessory is plugged in prio...

  • Page 29: Chapter 4

    Chapter 4 136-162 mhz vhf theory of operation 4.1 introduction this chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in chapter 7 of this manual. 4.2 vhf receiver the vhf receiver covers th...

  • Page 30

    June, 2005 6881096c25-b 4-2 136-162 mhz vhf theory of operation: vhf receiver constant at 6.2 ma regardless of device and temperature variations, for optimum dynamic range and noise figure. The output of the rf amplifier is applied to the interstage filter, a fixed-tuned 3-pole series-coupled resona...

  • Page 31

    6881096c25-b june, 2005 136-162 mhz vhf theory of operation: vhf transmitter 4-3 4.3 vhf transmitter the vhf transmitter covers the range of 136-162 mhz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (5 watts) and low power (1 ...

  • Page 32

    June, 2005 6881096c25-b 4-4 136-162 mhz vhf theory of operation: vhf frequency generation circuitry 4.3.4 antenna matching network the harmonic filter presents a 50 Ω impedance to antenna jack j140. A matching network, made up of c140-c141 and l140, is used to match the antenna impedance to the harm...

  • Page 33

    6881096c25-b june, 2005 136-162 mhz vhf theory of operation: vhf frequency generation circuitry 4-5 transmit modulation from the asficcmp (u451 pin 40) is applied to u201 pin 10 (mod_in). An electronic attenuator in the asficcmp adjusts overall transmitter deviation by varying the audio level applie...

  • Page 34

    June, 2005 6881096c25-b 4-6 136-162 mhz vhf theory of operation: vhf frequency generation circuitry one of the auxiliary outputs of the synthesizer ic (aux3, u201 pin 2) provides the trb signal which determines the operating mode of the vco, either receive or transmit. Figure 4-4. Vhf synthesizer bl...

  • Page 35

    6881096c25-b june, 2005 136-162 mhz vhf theory of operation: keypad 4-7 c267, and varactor d261. High-port audio modulation from the synthesizer ic is applied as vco_mod to varactor d262 which modulates the transmit vco. Figure 4-5. Vhf vco block diagram 4.5 keypad the keypad block diagram is shown ...

  • Page 36

    June, 2005 6881096c25-b 4-8 136-162 mhz vhf theory of operation: keypad notes:.

  • Page 37: Chapter 5

    Chapter 5 146-174 mhz vhf theory of operation 5.1 introduction this chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in chapter 7 of this manual. 5.2 vhf receiver the vhf receiver covers th...

  • Page 38

    June, 2005 6881096c25-b 5-2 146-174 mhz vhf theory of operation: vhf receiver constant at 6.2 ma regardless of device and temperature variations, for optimum dynamic range and noise figure. The output of the rf amplifier is applied to the interstage filter, a fixed-tuned 3-pole series-coupled resona...

  • Page 39

    6881096c25-b june, 2005 146-174 mhz vhf theory of operation: vhf transmitter 5-3 5.3 vhf transmitter the vhf transmitter covers the range of 146-174 mhz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (5 watts) and low power (1 ...

  • Page 40

    June, 2005 6881096c25-b 5-4 146-174 mhz vhf theory of operation: vhf frequency generation circuitry 5.3.4 antenna matching network the harmonic filter presents a 50 Ω impedance to antenna jack j140. A matching network, made up of c140-c141 and l140, is used to match the antenna impedance to the harm...

  • Page 41

    6881096c25-b june, 2005 146-174 mhz vhf theory of operation: vhf frequency generation circuitry 5-5 transmit modulation from the asficcmp (u451 pin 40) is applied to u201 pin 10 (mod_in). An electronic attenuator in the asficcmp adjusts overall transmitter deviation by varying the audio level applie...

  • Page 42

    June, 2005 6881096c25-b 5-6 146-174 mhz vhf theory of operation: vhf frequency generation circuitry one of the auxiliary outputs of the synthesizer ic (aux3, u201 pin 2) provides the trb signal which determines the operating mode of the vco, either receive or transmit. Figure 5-4. Vhf synthesizer bl...

  • Page 43

    6881096c25-b june, 2005 146-174 mhz vhf theory of operation: keypad 5-7 c267, and varactor d261. High-port audio modulation from the synthesizer ic is applied as vco_mod to varactor d262 which modulates the transmit vco. Figure 5-5. Vhf vco block diagram 5.5 keypad the keypad block diagram is shown ...

  • Page 44

    June, 2005 6881096c25-b 5-8 146-174 mhz vhf theory of operation: keypad notes:.

  • Page 45: Chapter 6

    Chapter 6 vhf troubleshooting tables 6.1 troubleshooting table for receiver table 6-1. Troubleshooting table for receiver symptom possible causes procedure corrective action radio dead (no turn-on beep, no led indication) 1. Battery dead or defec- tive. Substitute known good battery or battery elimi...

  • Page 46

    June, 2005 6881096c25-b 6-2 vhf troubleshooting tables: troubleshooting table for receiver no audio 1. Synthesizer out of lock verify u201-4 is at 3 v dc. Troubleshoot synthesizer/vco circuits. 2. Defective ific verify audio is present at u51-8. Check q70, y70, u51. 3. Rx audio buffer fault verify a...

  • Page 47

    6881096c25-b june, 2005 vhf troubleshooting tables: troubleshooting table for synthesizer 6-3 6.2 troubleshooting table for synthesizer table 6-2. Troubleshooting table for synthesizer symptom possible causes procedure corrective action synthesizer out of lock (rx mode only) 1. Vco fault verify osci...

  • Page 48

    June, 2005 6881096c25-b 6-4 vhf troubleshooting tables: troubleshooting table for transmitter 6.3 troubleshooting table for transmitter table 6-3. Troubleshooting table for transmitter symptom possible causes procedure corrective action no transmit (no tx led indication) 1. Ptt switch defective. Ver...

  • Page 49

    6881096c25-b june, 2005 vhf troubleshooting tables: troubleshooting table for transmitter 6-5 low power 1. Low tx injection check that rf level at jct. R100/ r101 per schematic. Check u251, l291-292, c290- 291. 2. Low gain in tx stage verify dc voltage at q100-e is ~1.3 v (vhf) or ~0.5 v (uhf). Veri...

  • Page 50

    June, 2005 6881096c25-b 6-6 vhf troubleshooting tables: troubleshooting table for transmitter no ext mic audio 1. Mic bias fault verify approx 1.8 v dc across ext mic cartridge in tx mode. Verify audio present (~10 mv rms) when speaking into mic. Check q470. R475, r477, l471. Check vr473, vr475, d47...

  • Page 51

    6881096c25-b june, 2005 vhf troubleshooting tables: troubleshooting table for board and ic signals 6-7 6.4 troubleshooting table for board and ic signals table 6-4. Troubleshooting table for board and ic signals ic designator pin pin function dc voltage comments (condition) u51 ific 1 rf input 44.85...

  • Page 52

    June, 2005 6881096c25-b 6-8 vhf troubleshooting tables: troubleshooting table for board and ic signals u110 rf power amp 1 rf input 0 (tx mode) 2 vgg (gate bias) 2.65 (typ) (tx mode) (4.25 v typ at vhf) 3 vdd 6.59 (tx mode) 4 rf output -- do not measure 5 ground gnd u150 dual opamp 1 unit 1 output 4...

  • Page 53

    6881096c25-b june, 2005 vhf troubleshooting tables: troubleshooting table for board and ic signals 6-9 u201 freq synthesizer 24 ref osc xtal2 0 25 ref osc warp output 3.00 26 superfilter cap 4.48 27 superfilter base (nu) 3.76 28 superfilter output 4.52 29 nc2 0 30 superfilter input 4.96 31 nc3 0 32 ...

  • Page 54

    June, 2005 6881096c25-b 6-10 vhf troubleshooting tables: troubleshooting table for board and ic signals u251 vco / buffer 12 prescaler output 2.26 13 tx switch output (nu) 0.06 14 vcc_buffers 3.00 15 tx vco emitter 0 (rx mode) 16 tx vco base 0 (rx mode) 17 gnd_logic gnd 18 vcc_logic 3.00 19 trb inpu...

  • Page 55

    6881096c25-b june, 2005 vhf troubleshooting tables: troubleshooting table for board and ic signals 6-11 u401 microprocessor 10 pb1_addr9 3.05 11 pb2_addr10 0.16 12 vdd 3.23 13 vss gnd 14 pbo_addr8 3.05 15 pb5_addr13 0.13 16 pg1_xa14 0.20 17 pg4_xa17 3.17 18 pg5_xa18 0 19 pg3_xa16 3.21 20 pg2_xa15 0....

  • Page 56

    June, 2005 6881096c25-b 6-12 vhf troubleshooting tables: troubleshooting table for board and ic signals u401 microprocessor 46 ph1_pw2 3.00 47 ph0_pw1 3.23 synth chip select 48 xirq 3.00 49 pi7 1.48 rx enable 50 pi6 0.01 tx enable 51 pi5 3.23 52 pi4 0 green led enable 53 pi3 0 red led enable 54 pi2 ...

  • Page 57

    6881096c25-b june, 2005 vhf troubleshooting tables: troubleshooting table for board and ic signals 6-13 u401 microprocessor 82 pa3_ic4_oc5_oc1 3.00 83 pa4_oc4_oc1 0 squelch detect input 84 pa5_oc3_oc1 0 channel activity input 85 pa6_oc2_oc1 0 86 pa7_pa1_oc1 0 87 vssr gnd 88 vddr 3.23 89 eclk (nu) 1....

  • Page 58

    June, 2005 6881096c25-b 6-14 vhf troubleshooting tables: troubleshooting table for board and ic signals u404 flash rom 10 a16 3.17 11 a15 0.30 12 a12 0.22 13 a7 3.03 14 a6 3.08 15 a5 3.06 16 a4 0 17 a3 0.24 18 a2 3.08 19 a1 3.05 20 a0 3.05 21 d0 0.69 22 d1 0.94 23 d2 1.08 24 gnd gnd 25 d3 0.78 26 d4...

  • Page 59

    6881096c25-b june, 2005 vhf troubleshooting tables: troubleshooting table for board and ic signals 6-15 u451 asfic_cmp 14 gcb1 general purpose output 0 15 gcb0 general purpose output 3.00 bw select (25 khz mode) 16 squelch channel activity output 0 to u401-84 17 squelch detect digital output 0 to u4...

  • Page 60

    June, 2005 6881096c25-b 6-16 vhf troubleshooting tables: troubleshooting table for board and ic signals notes: u480 dual opamp 1 unit 1 output 2.48 2 unit 1 (-) input 2.48 3 unit 1 (+) input 2.46 4 ground gnd 5 unit 2 (+) input 0.28 6 unit 2 (-) input 0.29 7 unit 2 output 0 8 vcc 4.96 u490 audio pow...

  • Page 61: Chapter 7

    Chapter 7 vhf schematic diagrams, overlays, and parts lists 7.1 introduction this section provides schematic diagrams, overlays, and parts lists for the radio circuit boards and interface connections. 7.1.1 notes for all schematics and circuit boards * component is frequency sensitive. Refer to the ...

  • Page 62

    June, 2005 6881096c25-b 7-2 vhf schematic diagrams, overlays, and parts lists: introduction 7. Circuit block interconnection legend: 301-400 dc regulation 401-450 microprocessor 451-550 audio name description uswb+ unswitched battery voltage (always on) 5v 5 volts (regulated) 5r 5 volts in rx mode o...

  • Page 63

    6881096c25-b june, 2005 vhf schematic diagrams, overlays, and parts lists: speaker and microphone schematic 7-3 7.1.2 six layer circuit board figure 7-1. Six-layer circuit board: copper steps in layer sequence 7.2 speaker and microphone schematic figure 7-2. Speaker and microphone schematic 7.2.1 sp...

  • Page 64

    June, 2005 6881096c25-b notes: 7-4 vhf schematic diagrams, overlays, and parts lists: speaker and microphone schematic.

  • Page 65

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-5 6881096c25-b june, 2005 chapter 7 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists rx_fe_vhf_r1 controller vco_vhf_r1 tx_vhf_r1 rx_be synth_vhf_r1 v_sf v_steer 5v 3v 5r 16_8_mhz 3v 5v lock mo...

  • Page 66

    7-6 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 700mv (rf) 3.95v (rx) 2.0v (rx) 3.38v (rx) 3.95v (rx) 0v (tx) 5.0v (rx) 485mv (rf) 500mv (rf) 445mv (rf) 705mv (rf) 3.9v (rx) 125 mv (rf) 128 mv (rf) 0.74v (rx) c30 30pf 0.1uf c99 5.6k rf balun 5...

  • Page 67

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-7 6881096c25-b june, 2005 5v for 25khz rx back end (overtone) 0v for 12.5khz 3.39v 3.05v 0.74v 1.5v 2.1v when -47 dbm @ antenna 9.1pf 1.1% c53 1 2 3 5v 1 2 3 d51 1 3 2 d52 cr51 c71 if_demod tc7w04f 1 7 0.1uf gnd1 3 4 gnd2...

  • Page 68

    7-8 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c206 c201 nu rx: 0v 3.0v to 8.0v 4.5v unlock: 0v d201 c203 100 nu nu tcxo nu 62pf 0v 0v y201 nu tx: 3v lock: 3v c202 0.01uf r206 crystal 107 mv (rf) 14r06 nu reference oscillator 3v 1sv232 47k 3v...

  • Page 69

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-9 6881096c25-b june, 2005 3.0v to 8.0v 4.5v rx: 0v tx: 3v 206 mv (rf) 850 mv (rf) 1200 mv (rf) 1.35 v (rx) 1.89 v (rx) 0.1uf 0.1uf c285 l281 c274 33nh 68nh 10pf c264 l254 10pf 1.0% c256 750 vco_vsf r282 r270 l252 560nh 18...

  • Page 70

    7-10 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 0.9 v (tx) 7.5 v 0 v (rx) 0 v (rx) 7.25 v (tx) 1.8v (tx) 7.4 v (rx) 0.15 v (tx) 2.5 v (low) 3.0 v (hi) 2.4 v (hi) 1.06 v (low) 0 v (rx) 7.3 v (tx) 2.5 v (low) 3.0 v (hi) 1100 mv (rf) do not meas...

  • Page 71

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-11 6881096c25-b june, 2005 dc_regulation audio microprocessor accessory/keypad connector c506 1000pf 11 c503 1000pf cntl_synth_cs a2 2 b1 4 b2 cntl_spi_clk switch s443 1 a1 3 c403 100pf 32 1000pf c402 cntl_5v sw_b+ 12 a1 ...

  • Page 72

    7-12 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b eeprom green led red led flash sram vss 4 wp 3 cs 1 hold 7 sck 6 si 5 so 2 vcc 8 d3_3v u402 x25128-2.7 c422 .01uf c413 0.1uf nc 4.7k r419 nu r434 40 vssl 87 vssr xfc 93 48 xirq xtal 91 94 reset ...

  • Page 73

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-13 6881096c25-b june, 2005 2.3 v 150 mv rms (25 khz) (rx) 75 mv rms (12.5 khz) (rx) 1.5 v 200 mv rms 10 mv rms (tx) 0 v (rx) 3 v (tx) 7.5 v 100k 3.5v (unsq) 3.5v (unsq) 0.15 v (unsq) 3 v (unsq) 1.5 v 145 mv rms 114 mv (rf...

  • Page 74

    7-14 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 5 v (rx) 0 v (tx) 0 v (rx) 5 v (tx) 3.3 v (rx) 0 v (tx) 0 v (rx) 3.3 v (tx) 5 v 3.3 v 3.3 v 3 v 0 v (off) 7.5 v (on) 0 v (off) 7.5 v (on) 7.5 v (off) 0 v (on) 0 v (off) 3.3 v (on) 7.5 v 0 v (tx)...

  • Page 75

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-15 6881096c25-b june, 2005 vddd c3 not placed not placed c6 not placed not placed c8 not placed not placed r14 not placed gnd gnd c1 not placed not placed lcd_sel main board connector gnd r5 not placed r2 not placed data ...

  • Page 76

    7-16 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c1 c2 c3 c4 c5 c6 c7 c8 c9 c22 c23 c24 c25 c29 c30 c31 c32 c33 c34 c35 c36 c69 c91 c92 c112 c113 c117 c201 c202 c204 c205 c207 c208 c209 c210 c212 c213 c214 c215 c216 c217 c218 c219 c230 c231 c2...

  • Page 77

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-17 6881096c25-b june, 2005 c20 c26 c40 c41 c42 c43 c44 c51 c52 c53 c55 c56 c57 c58 c59 c60 c61 c62 c63 c64 c65 c66 c67 c68 c70 c71 c72 c73 c74 c80 c81 c82 c90 c93 c99 c100 c101 c102 c103 c104 c105 c106 c107 c108 c109 c110...

  • Page 78

    7-18 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b component side solder side c1 c2 c3 c4 c5 c6 c7 c8 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 g1 g2 9 j1 28 1 g1 g2 j2 4 3 q1 4 3 q2 4 3 q3 4 3 q4 4 3 q5 4 3 q6 4 3 q7 4 3 q8 4 3 q9 4 3 q10...

  • Page 79

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-19 6881096c25-b june, 2005 vhf (136-162 mhz) radio parts list (8486769z02-a) circuit ref motorola part no. Description c1 2109445u43 cap, 27pf c2 2109445u48 cap, 43pf c3 2109445u49 cap, 47pf c4 2109445u39 cap, 18pf c5 210...

  • Page 80

    7-20 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c410 2311049a57 cap, 10uf c411 2113743m24 cap, 0.1uf c412 2113743l17 cap, 1000pf c413 2113743m24 cap, 0.1uf c414 2113743m24 cap, 0.1uf c415 2113743l17 cap, 1000pf c416 2113743l17 cap, 1000pf c41...

  • Page 81

    Vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists 7-21 6881096c25-b june, 2005 q520 5180159r01 dual npn, imx1 r20 0662057u97 res, 6.8k r21 0662057m50 res, 100 r22 0662057m94 res, 6.8k r23 0662057v11 res, 22k r24 0662057m71 res, 750 r25 0662057m92 res, 5.6k r26 0662057m01 r...

  • Page 82

    7-22 vhf 136-162 mhz (8486769z02-a) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b * motorola depot servicing only vhf (136-162 mhz) keypad board parts list (8466565a03-b) s444 1880619z02 switch, rotary on-off, with 10k volume control sh1 2686421z01 shield, comp side, rf front...

  • Page 83

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-23 6881096c25-b june, 2005 chapter 7 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) rx_fe_vhf_r1 controller vco_vhf_r1 tx_vhf_r1 rx_be synth_vhf_r1 v_sf v_steer 5v 3v 5r 16_8_mhz 3v 5v lock m...

  • Page 84

    7-24 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b 700mv (rf) 3.95v (rx) 2.0v (rx) 3.38v (rx) 3.95v (rx) 0v (tx) 5.0v (rx) 485mv (rf) 500mv (rf) 445mv (rf) 705mv (rf) 3.9v (rx) 125 mv (rf) 128 mv (rf) 0.74v (rx) c30 30pf 0.1uf c99 5.6k rf balun ...

  • Page 85

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-25 6881096c25-b june, 2005 5v for 25khz rx back end (overtone) 0v for 12.5khz 3.39v 3.05v 0.74v 1.5v 2.1v when -47 dbm @ antenna 9.1pf 1.1% c53 1 2 3 5v 1 2 3 d51 1 3 2 d52 cr51 c71 if_demod tc7w04f 1 7 0.1uf gnd1 3 4 gnd...

  • Page 86

    7-26 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b c206 c201 nu rx: 0v 3.0v to 8.0v 4.5v unlock: 0v d201 c203 100 nu nu tcxo nu 62pf 0v 0v y201 nu tx: 3v lock: 3v c202 0.01uf r206 crystal 107 mv (rf) 14r06 nu reference oscillator 3v 1sv232 47k 3...

  • Page 87

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-27 6881096c25-b june, 2005 3.0v to 8.0v 4.5v rx: 0v tx: 3v 206 mv (rf) 850 mv (rf) 1200 mv (rf) 1.35 v (rx) 1.89 v (rx) 0.1uf 0.1uf c285 l281 c274 33nh 68nh 10pf c264 l254 10pf 1.0% c256 750 vco_vsf r282 r270 l252 560nh 1...

  • Page 88

    7-28 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b 0.9 v (tx) 7.5 v 0 v (rx) 0 v (rx) 7.25 v (tx) 1.8v (tx) 7.4 v (rx) 0.15 v (tx) 2.5 v (low) 3.0 v (hi) 2.4 v (hi) 1.06 v (low) 0 v (rx) 7.3 v (tx) 2.5 v (low) 3.0 v (hi) 1100 mv (rf) do not meas...

  • Page 89

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-29 6881096c25-b june, 2005 dc_regulation audio microprocessor accessory/keypad connector c506 1000pf 11 c503 1000pf cntl_synth_cs a2 2 b1 4 b2 cntl_spi_clk switch s443 1 a1 3 c403 100pf 32 1000pf c402 cntl_5v sw_b+ 12 a1 ...

  • Page 90

    7-30 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b eeprom green led red led flash sram vss 4 wp 3 cs 1 hold 7 sck 6 si 5 so 2 vcc 8 d3_3v u402 x25128-2.7 c422 .01uf c413 0.1uf nc 4.7k r419 nu r434 40 vssl 87 vssr xfc 93 48 xirq xtal 91 94 reset ...

  • Page 91

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-31 6881096c25-b june, 2005 2.3 v 150 mv rms (25 khz) (rx) 75 mv rms (12.5 khz) (rx) 1.5 v 200 mv rms 10 mv rms (tx) 0 v (rx) 3 v (tx) 7.5 v 100k 3.5v (unsq) 3.5v (unsq) 0.15 v (unsq) 3 v (unsq) 1.5 v 145 mv rms 114 mv (rf...

  • Page 92

    7-32 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b 5 v (rx) 0 v (tx) 0 v (rx) 5 v (tx) 3.3 v (rx) 0 v (tx) 0 v (rx) 3.3 v (tx) 5 v 3.3 v 3.3 v 3 v 0 v (off) 7.5 v (on) 0 v (off) 7.5 v (on) 7.5 v (off) 0 v (on) 0 v (off) 3.3 v (on) 7.5 v 0 v (tx)...

  • Page 93

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-33 6881096c25-b june, 2005 up 8 3 f1 5 ledbl 0 4 data ref std limited keypad r3 not placed r4 not placed r5 not placed # gnd j1 display module connector r15 not placed r2 not placed c5 not placed not placed c7 not placed ...

  • Page 94

    7-34 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b c410 c412 c413 c418 c419 c421 c422 c430c431 c432 c433 c446 q440 r410 r417 r419 r424 r425 r431 r442 r443 sh401 1 4 58 u402 22 21 8 7 1 u403 32 17 16 1 u404 c480 c482 c488 c489 e452 r469 r481 r482...

  • Page 95

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-35 6881096c25-b june, 2005 c157 c121 c158 c122 c130 c132 c131 c135 c133 c134 c140 c136 c137 c141 d120 d121 l120 l121 l130 l131 l132 l140 r120 r121 r150 r151 u151 c102 c108 c109 c110 c116 c170 c155 c171 c100 c101 c103 c106...

  • Page 96

    7-36 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b component side solder side d1 d2 d3 d4 d5 d6 d7 d8 s17 s18 s19 s20 s21 s22 s23 s24 s25 s26 s27 s28 s29 s30 s31 s32 c1 c2 c3 c4 c5 c6 c7 c8 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 g1 g2 9...

  • Page 97

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-37 6881096c25-b june, 2005 vhf (136-162 mhz) radio parts list (8486769z04-c) circuit ref motorola part no. Description c1 2115153h43 cap, 22pf c2 2115153h48 cap, 36pf c3 2115153h49 cap, 47pf c4 2115153h39 cap, 18pf c5 211...

  • Page 98

    7-38 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b c410 2313960d07 cap, 10uf c411 2113946k02 cap, 100000pf c412 2113945a09 cap, 1000pf c413 2113946k02 cap, 100000pf c414 2113946k02 cap, 100000pf c415 2113945a09 cap, 1000pf c416 2113945a09 cap, 1...

  • Page 99

    Vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-39 6881096c25-b june, 2005 r53 0613952r13 res, 33k r54 0613952q90 res, 5100 r55 0613952q61 res, 330 r57 0613952q89 res, 4700 r60 0613952q82 res, 2400 r61 0613952r25 res, 100k r62 0613952q85 res, 3300 r63 0613952r15 res, 3...

  • Page 100

    7-40 vhf 136-162 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b vhf (136-162 mhz) keypad board parts list (8466565a03-b) t41 2515121h01 balun transformer t42 2515121h01 balun transformer u51 5115281h01 sa616 u52 5115070h01 tc7w04fu u110 0178034a01 pa module ...

  • Page 101

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-41 6881096c25-b june, 2005 chapter 7 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists rx_fe_vhf_r2 controller vco_vhf_r2 tx_vhf_r2 rx_be synth_vhf_r2 v_sf v_steer 3v 5r 16_8_mhz 3v 5v lock mod_...

  • Page 102

    7-42 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 0.74v (rx) 700mv (rf) 3.95v (rx) 2.0v (rx) 3.38v (rx) 3.95v (rx) 0v (tx) 5.0v (rx) 485mv (rf) 500mv (rf) 445mv (rf) 705mv (rf) 3.9v (rx) 125 mv (rf) 128 mv (rf) c36 68nh 2% 24pf 1% c22 1000pf l3...

  • Page 103

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-43 6881096c25-b june, 2005 100 mv rms (25khz) 2.1v when -47 dbm @ antenna 320 mv (rf) 390 mv (rf) 550mv (rf) 290 mv (rf) 0v for 12.5khz 500mv (rf) 0 v (25khz) 1 v (12.5khz) 170 mv (rf) 2.14 v 110 mv (rf) 170 mv (rf) 130 m...

  • Page 104

    7-44 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 1sv232 47k 3v 2.7pf 150k 45j68 d201 c203 100 nu nu tcxo 220pf 44 mv (rf) 205 mv (rf) 2.4 v (typ) tx: 3v lock: 3v c202 0.01uf r206 crystal 107 mv (rf) 14r06 nu reference oscillator 3v 0v 0v y201 ...

  • Page 105

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-45 6881096c25-b june, 2005 4.5v rx: 0v tx: 3v 206 mv (rf) 850 mv (rf) 1200 mv (rf) 1.35 v (rx) 1.89 v (rx) 3.0v to 8.0v 18 r270 vco_mod l252 560nh nu c266 1.0% 10pf l283 9.1pf c282 47 r253 11pf l265 330nh c286 330 r284 1s...

  • Page 106

    7-46 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 3.0 v (hi) 1100 mv (rf) do not measure 0.9 v (tx) 7.5 v 1500 mv (rf) 4.9 v (tx) 820 mv (rf) 1.5 v (tx) 0 v (rx) 1.6 v (tx) 0 v (rx) 0 v (rx) 0 v (rx) 7.25 v (tx) 1.8v (tx) 7.5 v 7.4 v (rx) 0.15 ...

  • Page 107

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-47 6881096c25-b june, 2005 dc_regulation audio microprocessor accessory/keypad connector 3v cntl_mod_out switch s441 1 a1 3 a2 2 b1 4 b2 24 cntl_rssi 3v 8 c501 1uf 17 bk1005hm471 e500 c505 1000pf r504 100 7 cntl_uswb+ 5v ...

  • Page 108

    7-48 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b eeprom green led red led flash sram 10k r410 820 r411 cs 1 hold 7 sck 6 si 5 so 2 vcc 8 vss 4 wp 3 d3_3v u402 x25128-2.7 .01uf 0.1uf c422 nc c413 4.7k r419 r434 nu 91 r413 100k 69 vrh 6 8 vrl 13...

  • Page 109

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-49 6881096c25-b june, 2005 0 v (rx) r516 microphone connector 3 v (tx) not placed 7.5 v 100k 3.5v (unsq) 3.5v (unsq) 0.15 v (unsq) 3 v (unsq) 1.5 v 145 mv rms 114 mv (rf) supply = 7.42 1/2 supply = 3.22 internal speaker 0...

  • Page 110

    7-50 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 5 v (rx) 0 v (tx) 0 v (rx) 5 v (tx) 3.3 v (rx) 0 v (tx) 0 v (rx) 3.3 v (tx) 5 v 3.3 v 3.3 v 3 v 0 v (off) 7.5 v (on) 0 v (off) 3.3 v (on) 7.5 v 0 v (tx) 0 v (rx) 5 v (tx) 5 v (rx) 0 v (off) 7.5 ...

  • Page 111

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-51 6881096c25-b june, 2005 vddd c3 not placed not placed c6 not placed not placed c8 not placed not placed r14 not placed gnd gnd c1 not placed not placed lcd_sel main board connector gnd r5 not placed r2 not placed data ...

  • Page 112

    7-52 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c1 c2 c3 c4 c5 c6 c7 c8 c9 c22 c23 c24 c25 c29 c30 c31 c32 c33 c34 c35 c36 c69 c91 c92 c112 c113 c117 c201 c202 c204 c205 c207 c208 c209 c210 c212 c213 c214 c215 c216 c217 c218 c219 c230 c231 c2...

  • Page 113

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-53 6881096c25-b june, 2005 c20 c26 c40 c41 c42 c43 c44 c51 c52 c53 c55 c56 c57 c58 c59 c60 c61 c62 c63 c64 c65 c66 c67 c68 c70 c71 c72 c73 c74 c80 c81 c82 c90 c93 c99 c100 c101 c102 c103 c104 c105 c106 c107 c108 c109 c110...

  • Page 114

    7-54 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b component side solder side c1 c2 c3 c4 c5 c6 c7 c8 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 g1 g2 9 j1 28 1 g1 g2 j2 4 3 q1 4 3 q2 4 3 q3 4 3 q4 4 3 q5 4 3 q6 4 3 q7 4 3 q8 4 3 q9 4 3 q10...

  • Page 115

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-55 6881096c25-b june, 2005 vhf (146-174 mhz) radio parts list (8486342z13-c) circuit ref motorola part no. Description c1 2109445u41 cap, 22pf c2 2109445u46 cap, 36pf c3 2109445u49 cap, 47pf c4 2109445u37 cap, 15pf c5 210...

  • Page 116

    7-56 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c411 2113743m24 cap, 0.1uf c412 2113743l17 cap, 1000pf c413 2113743m24 cap, 0.1uf c414 2113743m24 cap, 0.1uf c415 2113743l17 cap, 1000pf c416 2113743l17 cap, 1000pf c417 2113743l17 cap, 1000pf c...

  • Page 117

    Vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists 7-57 6881096c25-b june, 2005 r61 0662057n23 res, 100k r62 0662057m86 res, 3.3k r63 0662057n13 res, 39k r64 0662057n06 res, 20k r65 0662057n13 res, 39k r66 0662057n06 res, 20k r67 0662057n06 res, 20k r72 0662057m64 res, 390 ...

  • Page 118

    7-58 vhf 146-174 mhz (8486342z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b * motorola depot servicing only vhf (146-174 mhz) keypad board parts list (8466565a03-b) u52 5109522e10 tc7w04f u110 0186438z01 ra07m1317m_vhf u150 5113818a01 lm2904 u151 2484657r01 57r01 u201* ...

  • Page 119

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-59 6881096c25-b june, 2005 chapter 7 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) rx_fe_vhf_r2 controller vco_vhf_r2 tx_vhf_r2 rx_be synth_vhf_r2 v_sf v_steer 3v 5r 16_8_mhz 3v 5v lock mod_...

  • Page 120

    7-60 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b 0.74v (rx) 700mv (rf) 3.95v (rx) 2.0v (rx) 3.38v (rx) 3.95v (rx) 0v (tx) 5.0v (rx) 485mv (rf) 500mv (rf) 445mv (rf) 705mv (rf) 3.9v (rx) 125 mv (rf) 128 mv (rf) c36 68nh 2% 24pf 1% c22 1000pf l3...

  • Page 121

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-61 6881096c25-b june, 2005 100 mv rms (25khz) 2.1v when -47 dbm @ antenna 320 mv (rf) 390 mv (rf) 550mv (rf) 290 mv (rf) 0v for 12.5khz 500mv (rf) 0 v (25khz) 1 v (12.5khz) 170 mv (rf) 2.14 v 110 mv (rf) 170 mv (rf) 130 m...

  • Page 122

    7-62 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b 1sv232 47k 3v 2.7pf 150k 45j68 d201 c203 100 nu nu tcxo 220pf 44 mv (rf) 205 mv (rf) 2.4 v (typ) tx: 3v lock: 3v c202 0.01uf r206 crystal 107 mv (rf) 14r06 nu reference oscillator 3v 0v 0v y201 ...

  • Page 123

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-63 6881096c25-b june, 2005 4.5v rx: 0v tx: 3v 206 mv (rf) 850 mv (rf) 1200 mv (rf) 1.35 v (rx) 1.89 v (rx) 3.0v to 8.0v 18 r270 vco_mod l252 560nh nu c266 1.0% 10pf l283 9.1pf c282 47 r253 11pf l265 330nh c286 330 r284 1s...

  • Page 124

    7-64 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b 3.0 v (hi) 1100 mv (rf) do not measure 0.9 v (tx) 7.5 v 1500 mv (rf) 4.9 v (tx) 820 mv (rf) 1.5 v (tx) 0 v (rx) 1.6 v (tx) 0 v (rx) 0 v (rx) 0 v (rx) 7.25 v (tx) 1.8v (tx) 7.5 v 7.4 v (rx) 0.15 ...

  • Page 125

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-65 6881096c25-b june, 2005 dc_regulation audio microprocessor accessory/keypad connector 3v cntl_mod_out switch s441 1 a1 3 a2 2 b1 4 b2 24 cntl_rssi 3v 8 c501 1uf 17 bk1005hm471 e500 c505 1000pf r504 100 7 cntl_uswb + 5v...

  • Page 126

    7-66 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b eeprom green led red led flash sram 10k r410 820 r411 cs 1 hold 7 sck 6 si 5 so 2 vcc 8 vss 4 wp 3 d3_3v u402 x25128-2.7 .01uf 0.1uf c422 nc c413 4.7k r419 r434 nu 91 r413 100k 69 vrh 68 vrl 13 ...

  • Page 127

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-67 6881096c25-b june, 2005 0 v (rx) r516 microphone connector 3 v (tx) not placed 7.5 v 100k 3.5v (unsq) 3.5v (unsq) 0.15 v (unsq) 3 v (unsq) 1.5 v 145 mv rms 114 mv (rf) supply = 7.42 1/2 supply = 3.22 internal speaker 0...

  • Page 128

    7-68 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b 5 v (rx) 0 v (tx) 0 v (rx) 5 v (tx) 3.3 v (rx) 0 v (tx) 0 v (rx) 3.3 v (tx) 5 v 3.3 v 3.3 v 3 v 0 v (off) 7.5 v (on) 0 v (off) 3.3 v (on) 7.5 v 0 v (tx) 0 v (rx) 5 v (tx) 5 v (rx) 0 v (off) 7.5 ...

  • Page 129

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-69 6881096c25-b june, 2005 vddd c3 not placed not placed c6 not placed not placed c8 not placed not placed r14 not placed gnd gnd c1 not placed not placed lcd_sel main board connector gnd r5 not placed r2 not placed data ...

  • Page 130

    7-70 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b c410 c412 c413 c418 c419 c421 c422 c430c431 c432 c433 c446 q440 r410 r417 r419 r424 r425 r431 r442 r443 sh401 1 4 58 u402 22 21 8 7 1 u403 32 17 16 1 u404 c480 c482 c488 c489 e452 r469 r481 r482...

  • Page 131

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-71 6881096c25-b june, 2005 c157 c121 c158 c122 c130 c132 c131 c135 c133 c134 c140 c136 c137 c141 d120 d121 l120 l121 l130 l131 l132 l140 r120 r121 r150 r151 u151 c102 c108 c109 c110 c116 c170 c155 c171 c100 c101 c103 c106...

  • Page 132

    7-72 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b component side solder side d1 d2 d3 d4 d5 d6 d7 d8 s17 s18 s19 s20 s21 s22 s23 s24 s25 s26 s27 s28 s29 s30 s31 s32 c1 c2 c3 c4 c5 c6 c7 c8 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 g1 g2 9...

  • Page 133

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-73 6881096c25-b june, 2005 vhf (146-174 mhz) radio parts list (8486769z04-c) circuit ref motorola part no. Description c1 2115153h41 cap, 22pf c2 2115153h46 cap, 36pf c3 2115153h49 cap, 47pf c4 2115153h37 cap, 15pf c5 211...

  • Page 134

    7-74 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b c410 2313960d07 cap, 10uf c411 2113946k02 cap, 100000pf c412 2113945a09 cap, 1000pf c413 2113946k02 cap, 100000pf c414 2113946k02 cap, 100000pf c415 2113945a09 cap, 1000pf c416 2113945a09 cap, 1...

  • Page 135

    Vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) 7-75 6881096c25-b june, 2005 r53 0613952r13 res, 33k r54 0613952q90 res, 5100 r55 0613952q61 res, 330 r57 0613952q89 res, 4700 r60 0613952q82 res, 2400 r61 0613952r25 res, 100k r62 0613952q85 res, 3300 r63 0613952r15 res, 3...

  • Page 136

    7-76 vhf 146-174 mhz schematic diagrams, overlays, and parts lists (8486769z04-c) june, 2005 6881096c25-b vhf (146-174 mhz) keypad board parts list (8466565a03-b) t41 2515121h01 balun transformer t42 2515121h01 balun transformer u51 5115281h01 sa616 u52 5115070h01 tc7w04fu u110 0178034a01 pa module ...

  • Page 137: Chapter 8

    Chapter 8 403-440 mhz uhf theory of operation 8.1 introduction this chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in chapter 12 of this manual. 8.2 uhf receiver the uhf receiver covers t...

  • Page 138

    June, 2005 6881096c25-b 8-2 403-440 mhz uhf theory of operation: uhf receiver the output of the rf amplifier is applied to the interstage filter, a fixed-tuned 4-pole butterworth shunt-coupled resonator design having a 3 db bandwidth of 68 mhz centered at 462 mhz, and insertion loss of 3.5 db. This ...

  • Page 139

    6881096c25-b june, 2005 403-440 mhz uhf theory of operation: uhf transmitter 8-3 8.3 uhf transmitter the uhf transmitter covers the range of 403-440 mhz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (4 watts) and low power (1 ...

  • Page 140

    June, 2005 6881096c25-b 8-4 403-440 mhz uhf theory of operation: uhf frequency generation circuitry 8.3.4 antenna matching network the harmonic filter presents a 50 Ω impedance to antenna jack j140. A matching network, made up of c140-c141 and l140, is used to match the antenna impedance to the harm...

  • Page 141

    6881096c25-b june, 2005 403-440 mhz uhf theory of operation: uhf frequency generation circuitry 8-5 spi_clk, and synth_cs (chip select) lines (u409 pins 100, 1 and 47 respectively). A logic high (3 v) from u201 pin 4 indicates to the microprocessor that the synthesizer is locked. Figure 8-3. Uhf fre...

  • Page 142

    June, 2005 6881096c25-b 8-6 403-440 mhz uhf theory of operation: uhf frequency generation circuitry one of the auxiliary outputs of the synthesizer ic (aux3, u201 pin 2) provides the trb signal which determines the operating mode of the vco, either receive or transmit. Figure 8-4. Uhf synthesizer bl...

  • Page 143

    6881096c25-b june, 2005 403-440 mhz uhf theory of operation: keypad 8-7 c267, and varactor d261. High-port audio modulation from the synthesizer ic is applied as vco_mod to varactor d262 which modulates the transmit vco. Figure 8-5. Uhf vco block diagram 8.5 keypad the keypad block diagram is shown ...

  • Page 144

    June, 2005 6881096c25-b notes: 8-8 403-440 mhz uhf theory of operation: keypad.

  • Page 145: Chapter 9

    Chapter 9 438-470 mhz uhf theory of operation 9.1 introduction this chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in chapter 12 of this manual. 9.2 uhf receiver the uhf receiver covers t...

  • Page 146

    June, 2005 6881096c25-b 9-2 438-470 mhz uhf theory of operation: uhf receiver the output of the rf amplifier is applied to the interstage filter, a fixed-tuned 4-pole butterworth shunt-coupled resonator design having a 3 db bandwidth of 68 mhz centered at 462 mhz, and insertion loss of 3 db. This fi...

  • Page 147

    6881096c25-b june, 2005 438-470 mhz uhf theory of operation: uhf transmitter 9-3 9.3 uhf transmitter the uhf transmitter covers the range of 438-470 mhz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (4 watts) and low power (1 ...

  • Page 148

    June, 2005 6881096c25-b 9-4 438-470 mhz uhf theory of operation: uhf frequency generation circuitry 9.3.4 antenna matching network the harmonic filter presents a 50 Ω impedance to antenna jack j140. A matching network, made up of c140-c141 and l140, is used to match the antenna impedance to the harm...

  • Page 149

    6881096c25-b june, 2005 438-470 mhz uhf theory of operation: uhf frequency generation circuitry 9-5 spi_clk, and synth_cs (chip select) lines (u409 pins 100, 1 and 47 respectively). A logic high (3 v) from u201 pin 4 indicates to the microprocessor that the synthesizer is locked. Figure 9-3. Uhf fre...

  • Page 150

    June, 2005 6881096c25-b 9-6 438-470 mhz uhf theory of operation: uhf frequency generation circuitry one of the auxiliary outputs of the synthesizer ic (aux3, u201 pin 2) provides the trb signal which determines the operating mode of the vco, either receive or transmit. Figure 9-4. Uhf synthesizer bl...

  • Page 151

    6881096c25-b june, 2005 438-470 mhz uhf theory of operation: keypad 9-7 c267, and varactor d261. High-port audio modulation from the synthesizer ic is applied as vco_mod to varactor d262 which modulates the transmit vco. Figure 9-5. Uhf vco block diagram 9.5 keypad the keypad block diagram is shown ...

  • Page 152

    June, 2005 6881096c25-b notes: 9-8 438-470 mhz uhf theory of operation: keypad.

  • Page 153

    Chapter 10 465-495 mhz uhf theory of operation 10.1 introduction this chapter provides a detailed theory of operation for the radio components. Schematic diagrams for the circuits described in the following paragraphs are located in chapter 12 of this manual. 10.2 uhf receiver the uhf receiver cover...

  • Page 154

    June, 2005 6881096c25-b 10-2 465-495 mhz uhf theory of operation: uhf receiver the output of the rf amplifier is applied to the interstage filter, a fixed-tuned 4-pole butterworth shunt-coupled resonator design having a 3 db bandwidth of 68 mhz centered at 480 mhz, and insertion loss of 3.3 db. This...

  • Page 155

    6881096c25-b june, 2005 465-495 mhz uhf theory of operation: uhf transmitter 10-3 10.3 uhf transmitter the uhf transmitter covers the range of 465-495 mhz. Depending on model, the output power of the transmitter is either switchable on a per-channel basis between high power (4 watts) and low power (...

  • Page 156

    June, 2005 6881096c25-b 10-4 465-495 mhz uhf theory of operation: uhf frequency generation circuitry 10.3.4 antenna matching network the harmonic filter presents a 50 Ω impedance to antenna jack j140. A matching network, made up of c140-c141 and l140, is used to match the antenna impedance to the ha...

  • Page 157

    6881096c25-b june, 2005 465-495 mhz uhf theory of operation: uhf frequency generation circuitry 10-5 spi_clk, and synth_cs (chip select) lines (u409 pins 100, 1 and 47 respectively). A logic high (3 v) from u201 pin 4 indicates to the microprocessor that the synthesizer is locked. Figure 10-3. Uhf f...

  • Page 158

    June, 2005 6881096c25-b 10-6 465-495 mhz uhf theory of operation: uhf frequency generation circuitry one of the auxiliary outputs of the synthesizer ic (aux3, u201 pin 2) provides the trb signal which determines the operating mode of the vco, either receive or transmit. Figure 10-4. Uhf synthesizer ...

  • Page 159

    6881096c25-b june, 2005 465-495 mhz uhf theory of operation: keypad 10-7 c267, and varactor d261. High-port audio modulation from the synthesizer ic is applied as vco_mod to varactor d262 which modulates the transmit vco. Figure 10-5. Uhf vco block diagram 10.5 keypad the keypad block diagram is sho...

  • Page 160

    June, 2005 6881096c25-b notes: 10-8 465-495 mhz uhf theory of operation: keypad.

  • Page 161

    Chapter 11 uhf troubleshooting tables 11.1 troubleshooting table for receiver table 11-1. Troubleshooting table for receiver symptom possible causes procedure corrective action radio dead (no turn-on beep, no led indication) 1. Battery dead or defec- tive. Substitute known good battery or battery el...

  • Page 162

    June, 2005 6881096c25-b 11-2 uhf troubleshooting tables: troubleshooting table for receiver no audio 1. Synthesizer out of lock verify u201-4 is at 3v dc. Troubleshoot synthesizer/vco circuits. 2. Defective ific verify audio is present at u51-8. Check q70, y70, u51. 3. Rx audio buffer fault verify a...

  • Page 163

    6881096c25-b june, 2005 uhf troubleshooting tables: troubleshooting table for synthesizer 11-3 11.2 troubleshooting table for synthesizer table 11-2. Troubleshooting table for synthesizer symptom possible causes procedure corrective action synthesizer out of lock (rx mode only) 1. Vco fault verify o...

  • Page 164

    June, 2005 6881096c25-b 11-4 uhf troubleshooting tables: troubleshooting table for transmitter 11.3 troubleshooting table for transmitter table 11-3. Troubleshooting table for transmitter symptom possible causes procedure corrective action no transmit (no tx led indication) 1. Ptt switch defective. ...

  • Page 165

    6881096c25-b june, 2005 uhf troubleshooting tables: troubleshooting table for transmitter 11-5 poor tx range, conducted power ok 1. Rf test jack defective verify continuity of j140 pins 3 and 4 in rx mode only. Replace j140. 2. Antenna matching net- work fault visually inspect components c140- 141, ...

  • Page 166

    June, 2005 6881096c25-b 11-6 uhf troubleshooting tables: troubleshooting table for board and ic signals 11.4 troubleshooting table for board and ic signals table 11-4. Troubleshooting table for board and ic signals ic designator pin pin function dc voltage comments (condition) u51 ific 1 rf input 44...

  • Page 167

    6881096c25-b june, 2005 uhf troubleshooting tables: troubleshooting table for board and ic signals 11-7 u110 rf power amp 1 rf input 0 (tx mode) 2 vgg (gate bias) 2.65 (typ) (tx mode) (4.25v typ at vhf) 3 vdd 6.59 (tx mode) 4 rf output -- do not measure 5 ground gnd u150 dual opamp 1 unit 1 output 4...

  • Page 168

    June, 2005 6881096c25-b 11-8 uhf troubleshooting tables: troubleshooting table for board and ic signals u201 freq synthesizer 24 ref osc xtal2 0 25 ref osc warp output 3.00 26 superfilter cap 4.48 27 superfilter base (nu) 3.76 28 superfilter output 4.52 29 nc2 0 30 superfilter input 4.96 31 nc3 0 32...

  • Page 169

    6881096c25-b june, 2005 uhf troubleshooting tables: troubleshooting table for board and ic signals 11-9 u251 vco / buffer 12 prescaler output 2.26 13 tx switch output (nu) 0.06 14 vcc_buffers 3.00 15 tx vco emitter 0 (rx mode) 16 tx vco base 0 (rx mode) 17 gnd_logic gnd 18 vcc_logic 3.00 19 trb inpu...

  • Page 170

    June, 2005 6881096c25-b 11-10 uhf troubleshooting tables: troubleshooting table for board and ic signals u401 microprocessor 10 pb1_addr9 3.05 11 pb2_addr10 0.16 12 vdd 3.23 13 vss gnd 14 pbo_addr8 3.05 15 pb5_addr13 0.13 16 pg1_xa14 0.20 17 pg4_xa17 3.17 18 pg5_xa18 0 19 pg3_xa16 3.21 20 pg2_xa15 0...

  • Page 171

    6881096c25-b june, 2005 uhf troubleshooting tables: troubleshooting table for board and ic signals 11-11 u401 microprocessor 46 ph1_pw2 3.00 47 ph0_pw1 3.23 synth chip select 48 xirq 3.00 49 pi7 1.48 rx enable 50 pi6 0.01 tx enable 51 pi5 3.23 52 pi4 0 green led enable 53 pi3 0 red led enable 54 pi2...

  • Page 172

    June, 2005 6881096c25-b 11-12 uhf troubleshooting tables: troubleshooting table for board and ic signals u401 microprocessor 82 pa3_ic4_oc5_oc1 3.00 83 pa4_oc4_oc1 0 squelch detect input 84 pa5_oc3_oc1 0 channel activity input 85 pa6_oc2_oc1 0 86 pa7_pa1_oc1 0 87 vssr gnd 88 vddr 3.23 89 eclk (nu) 1...

  • Page 173

    6881096c25-b june, 2005 uhf troubleshooting tables: troubleshooting table for board and ic signals 11-13 u404 flash rom 10 a16 3.17 11 a15 0.30 12 a12 0.22 13 a7 3.03 14 a6 3.08 15 a5 3.06 16 a4 0 17 a3 0.24 18 a2 3.08 19 a1 3.05 20 a0 3.05 21 d0 0.69 22 d1 0.94 23 d2 1.08 24 gnd gnd 25 d3 0.78 26 d...

  • Page 174

    June, 2005 6881096c25-b 11-14 uhf troubleshooting tables: troubleshooting table for board and ic signals u451 asfic_cmp 14 gcb1 general purpose output 0 15 gcb0 general purpose output 3.00 bw select (25 khz mode) 16 squelch channel activity output 0 to u401-84 17 squelch detect digital output 0 to u...

  • Page 175

    6881096c25-b june, 2005 uhf troubleshooting tables: troubleshooting table for board and ic signals 11-15 u480 dual opamp 1 unit 1 output 2.48 2 unit 1 (-) input 2.48 3 unit 1 (+) input 2.46 4 ground gnd 5 unit 2 (+) input 0.28 6 unit 2 (-) input 0.29 7 unit 2 output 0 8 vcc 4.96 u490 audio power amp...

  • Page 176

    June, 2005 6881096c25-b notes: 11-16 uhf troubleshooting tables: troubleshooting table for board and ic signals.

  • Page 177: Parts Lists

    Chapter 12 uhf schematic diagrams, overlays, and parts lists 12.1 introduction this section provides schematic diagrams, overlays, and parts lists for the radio circuit boards and interface connections. 12.1.1 notes for all schematics and circuit boards * component is frequency sensitive. Refer to t...

  • Page 178

    June, 2005 6881096c25-b 12-2 uhf schematic diagrams, overlays, and parts lists: introduction 7. Circuit block interconnection legend: 301-400 dc regulation 401-450 microprocessor 451-550 audio name description uswb+ unswitched battery voltage (always on) 5v 5 volts (regulated) 5r 5 volts in rx mode ...

  • Page 179

    6881096c25-b june, 2005 uhf schematic diagrams, overlays, and parts lists: speaker and microphone schematic 12-3 12.1.2 six layer circuit board figure 12-1. Six-layer circuit board: copper steps in layer sequence 12.2 speaker and microphone schematic figure 12-2. Speaker and microphone schematic 12....

  • Page 180

    June, 2005 6881096c25-b notes: 12-4 uhf schematic diagrams, overlays, and parts lists: speaker and microphone schematic.

  • Page 181

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-5 6881096c25-b june, 2005 chapter 12 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists controller rx_be synth_uhf_r1 tx_uhf_r1 vco_uhf_r1 rx_fe_uhf_r1 uhf r1 tx_inj uswb + 3v 5r presc rx_inj tr...

  • Page 182

    12-6 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 0.79v 4.2v uhf r1 front end 0.1uf c99 r20 5.6k r21 75 c36 1% 16pf c20 390pf c34 1.6% 6.2pf 15pf 1% c1 18pf 1% c33 c523 5.5% 0.55pf c37 1.6% 6.2pf l40 27nh 18pf 1% c2 1.0% 10pf fe_rf_inj c51 c12 ...

  • Page 183

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-7 6881096c25-b june, 2005 5v for 25khz rx back end (overtone) 0v for 12.5khz 3.39v 3.05v 0.74v 1.5v 2.1v when -47 dbm @ antenna 9.1pf 1.1% c53 1 2 3 5v 1 2 3 d51 1 3 2 d52 cr51 c71 if_demod tc7w04f 1 7 0.1uf gnd1 3 4 gnd...

  • Page 184

    12-8 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 100 c202 0v 3v 0v tx: 3v rx: 0v 14r06 150k nu r202 c206 d201 r206 y202 c203 1sv232 4.5v unlock: 0v 3v y201 2.7pf 45j68 lock: 3v nu nu nu nu nu 47k 3.2v to 4.5v c201 reference oscillator nu 0.01u...

  • Page 185

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-9 6881096c25-b june, 2005 uhf r1 vco 3.2v to 9.5v 4.5v rx: 0v tx: 3v tx_switch 13 vcc_b uffers 14 vcc_logi c 18 rx_out 8 rx_switch 7 super_fltr 3 19 trb_in tx_base 16 tx_emitter 15 tx_iadj 1 tx_out 10 flip_in 20 gnd_b uf...

  • Page 186

    12-10 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b uhf r1 tx d121 4880973z02 bar63-02w 150 r120 18nh l121 r155 1% 100k 390pf c100 d120 ma4ph261 vr110 mm3z3v9t1 3.9v 4813830a86 c123 5.6pf c150 390pf c103 390pf r107 nu c109 0.1uf c156 r104 18 .01...

  • Page 187

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-11 6881096c25-b june, 2005 audi o dc_regulation microprocessor accessory/keypa d controller connector cntl_5t c50 4 1000pf 1000p f c507 1000pf 1000pf c506 11 c503 spi_d a ta_out sq_det sw_b + vo x vs_audio_sel vs_gain_se...

  • Page 188

    12-12 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b eeprom green led red led microprocessor flash sram nc c413 0.1uf 4.7k r419 91 nu r434 vddsyn 69 vrh 68 vrl 13 vss 40 vssl 87 vssr xfc 93 48 xirq xt al pj4 76 pj5 77 pj6 78 pj7 94 reset 12 vdd 3...

  • Page 189

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-13 6881096c25-b june, 2005 2 5 1 4 6 accessory connector internal speaker 0 not placed not placed not placed not placed audio microphone connector vhf uhf r513 r515 r516 r517 dc level 0.3 - 0.4 v low not placed 0 100k su...

  • Page 190

    12-14 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 1 2 dc regulation q493 3 100k r322 390pf c301 100 r507 q311 d301 c313 .01uf 150pf c323 u330 tk71730s bypass 4 ctrl 3 gnd 2 1 vin vout 5 .01uf r506 c304 10uf c312 100 c302 390pf 10uf c334 f301 3...

  • Page 191

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-15 6881096c25-b june, 2005 vddd c3 not placed not placed c6 not placed not placed c8 not placed not placed r14 not placed gnd gnd c1 not placed not placed lcd_sel main board connector gnd r5 not placed r2 not placed data...

  • Page 192

    12-16 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11 c12 c21 c23 c25 c27 c28 c29 c30 c31 c32 c33 c34 c35 c36 c37 c38 c39 c46 c47 c48 c69 c91 c92 c113 c116 c117 c201 c202 c204 c205 c207 c208 c209 c210 c212 c213 c...

  • Page 193

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-17 6881096c25-b june, 2005 c13 c14 c20 c26 c41 c42 c43 c44 c45 c49 c51 c52 c53 c55 c56 c57 c58 c59 c60 c61 c62 c63 c64 c65 c66 c67 c68 c70 c71 c72 c73 c74 c80 c81 c82 c90 c93 c99 c100 c101 c102 c103 c104 c105 c106 c107 c...

  • Page 194

    12-18 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b component side solder side c1 c2 c3 c4 c5 c6 c7 c8 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 g1 g2 9 j1 28 1 g1 g2 j2 4 3 q1 4 3 q2 4 3 q3 4 3 q4 4 3 q5 4 3 q6 4 3 q7 4 3 q8 4 3 q9 4 3 q1...

  • Page 195

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-19 6881096c25-b june, 2005 uhf (403-440 mhz) radio parts list (8486635z03-o) circuit ref motorola part no. Description c1 2109445u37 cap, 15pf c2 2109445u39 cap, 18pf c3 2109445u09 cap, 1.8pf c4 not_placed cap, 20pf c5 0...

  • Page 196

    12-20 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c406 2113743n50 cap, 150pf c407 2113743l17 cap, 1000pf c408 2113743l17 cap, 1000pf c409 2113743l17 cap, 1000pf c410 2311049a57 capp, 10uf c411 2113743m24 cap, 0.1uf c412 2113743l17 cap, 1000pf ...

  • Page 197

    Uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists 12-21 6881096c25-b june, 2005 r51 0662057m43 res, 51 r52 0662057n01 res, 12k r53 0662057n11 res, 33k r54 0662057m91 res, 5.1k r55 0662057m62 res, 330 r57 0662057m90 res, 4.7k r60 0662057m83 res, 2.4k r61 0662057n23 res, 100...

  • Page 198

    12-22 uhf 403-440 mhz (8486635z03-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b * motorola depot servicing only uhf (403-440 mhz) keypad board parts list (8466565a03-b) u201* 5185963a27 63a27 u251 5105750u54 50u54 u310 5102478j01 tk71750s u320 5185963a55 lp2986 u330 510247...

  • Page 199

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-23 6881096c25-b june, 2005 chapter 12 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists controller rx_fe_uhf_r2 synth_uhf_r2 tx_uhf_r2 vco_uhf_r2 rx_be if_in rssi uhf r2 rx_out tx_ena tx_inj us...

  • Page 200

    12-24 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 4.2v uhf r2 front end 0.79v c5 1.3% 7.5pf c26 390pf 8pf 1.25% c10 r24 1.5k c39 1.43% 7pf 0.1uf c99 r20 5.6k 8.2pf c44 c36 1% 18pf c20 390pf c34 1.5% 6.8pf c522 0.5pf 4 nu c46 cr41 hsms2829 io1 ...

  • Page 201

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-25 6881096c25-b june, 2005 5v for 25khz rx back end (overtone) 0v for 12.5khz 3.39v 3.05v 0.74v 1.5v 2.1v when -47 dbm @ antenna 9.1pf 1.1% c53 1 2 3 5v 1 2 3 d51 1 3 2 d52 cr51 c71 if_demod tc7w04f 1 7 0.1uf gnd1 3 4 gn...

  • Page 202

    12-26 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b tcxo nu nu 220pf crystal r206 y202 unlock: 0v 0.01uf 3v 0v tx: 3v c202 1sv232 y201 2.7pf 45j68 lock: 3v 4.5v nu nu 47k rx: 0v 3.2v to 4.5v c201 reference oscillator nu 62pf nu nu nu 14r06 150k ...

  • Page 203

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-27 6881096c25-b june, 2005 presc_out tx: 3v uhf r2 vco 3.2v to 9.5v 4.5v rx: 0v 15nh l281 l292 15nh l282 27nh 910 r282 nc vco_mod vco_vsf 150 r283 c267 1.3% 7.5pf 0.1uf c272 220 r284 l276 27nh r277 0 r276 1k vco_3v c251 ...

  • Page 204

    12-28 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b uhf r2 tx 820 r102 390pf c113 390pf c171 c170 390pf r150 0.1 390pf r107 nu c103 c109 0.1uf 390pf c158 390pf pa_5t c154 c106 2 g1 5 g2 4 s1 3 s2 1 t1 6 t2 390pf 10pf j140 u150-2 lm2904 6 5 7 8 4...

  • Page 205

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-29 6881096c25-b june, 2005 audi o dc_regulation microprocessor accessory/keypa d controller connector cntl_5t c50 4 1000pf 1000p f c507 1000pf 1000pf c506 11 c503 spi_d a ta_out sq_det sw_b + vo x vs_audio_sel vs_gain_se...

  • Page 206

    12-30 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b eeprom green led red led microprocessor flash sram nc c413 0.1uf 4.7k r419 91 nu r434 vddsyn 69 vrh 68 vrl 13 vss 40 vssl 87 vssr xfc 93 48 xirq xt al pj4 76 pj5 77 pj6 78 pj7 94 reset 12 vdd 3...

  • Page 207

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-31 6881096c25-b june, 2005 2 5 1 4 6 accessory connector internal speaker 0 not placed not placed not placed not placed audio microphone connector vhf uhf r513 r515 r516 r517 dc level 0.3 - 0.4 v low not placed 0 100k su...

  • Page 208

    12-32 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 1 2 dc regulation q493 3 100k r322 390pf c301 100 r507 q311 d301 c313 .01uf 150pf c323 u330 tk71730s bypass 4 ctrl 3 gnd 2 1 vin vout 5 .01uf r506 c304 10uf c312 100 c302 390pf 10uf c334 f301 3...

  • Page 209

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-33 6881096c25-b june, 2005 vddd c3 not placed not placed c6 not placed not placed c8 not placed not placed r14 not placed gnd gnd c1 not placed not placed lcd_sel main board connector gnd r5 not placed r2 not placed data...

  • Page 210

    12-34 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11 c12 c21 c23 c25 c27 c28 c29 c30 c31 c32 c33 c34 c35 c36 c37 c38 c39 c46 c47 c48 c69 c91 c92 c113 c116 c117 c201 c202 c204 c205 c207 c208 c209 c210 c212 c213 c...

  • Page 211

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-35 6881096c25-b june, 2005 c13 c14 c20 c26 c41 c42 c43 c44 c45 c49 c51 c52 c53 c55 c56 c57 c58 c59 c60 c61 c62 c63 c64 c65 c66 c67 c68 c70 c71 c72 c73 c74 c80 c81 c82 c90 c93 c99 c100 c101 c102 c103 c104 c105 c106 c107 c...

  • Page 212

    12-36 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b component side solder side c1 c2 c3 c4 c5 c6 c7 c8 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 g1 g2 9 j1 28 1 g1 g2 j2 4 3 q1 4 3 q2 4 3 q3 4 3 q4 4 3 q5 4 3 q6 4 3 q7 4 3 q8 4 3 q9 4 3 q1...

  • Page 213

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-37 6881096c25-b june, 2005 uhf (438-470 mhz) radio parts list (8486348z13-c) circuit ref motorola part no. Description c1 2109445u36 cap, 13pf c2 2109445u37 cap, 15pf c3 2109445u07 cap, 1.5pf c4 not_placed cap, 20pf c5 0...

  • Page 214

    12-38 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c400 not_placed cap, .022uf c401 2113743m24 cap, 0.1uf c402 2113743l17 cap, 1000pf c403 2113743l17 cap, 1000pf c404 2113743l17 cap, 1000pf c405 2113743l17 cap, 1000pf c406 2113743l17 cap, 1000p...

  • Page 215

    Uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists 12-39 6881096c25-b june, 2005 r23 0662057n09 res, 27k r24 0662057m78 res, 1.5k r25 0662057m92 res, 5.6k r40 0662057m74 res, 1k r51 0662057m43 res, 51 r52 0662057n01 res, 12k r53 0662057n11 res, 33k r54 0662057m91 res, 5.1k ...

  • Page 216

    12-40 uhf 438-470 mhz (8486348z13-c) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b * motorola depot servicing only uhf (438-470 mhz) keypad board parts list (8466565a03-b) u151 2484657r01 57r01 u201* 5185963a27 63a27 u251 5105750u54 50u54 u310 5102478j01 tk71750s u320 5185963...

  • Page 217

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-41 6881096c25-b june, 2005 chapter 12 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists controller rx_be synth_uhf_r3 tx_uhf_r3 vco_uhf_r3 rx_fe_uhf_r3 uhf r3 tx_ena tx_inj uswb + 3v 5r presc r...

  • Page 218

    12-42 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 0.79v 4.2v uhf r3 front end c32 1.6% 6.2pf 10pf 1.0% 10pf c41 sh40 shield 1 c28 1.0% c42 1.2% 8.2pf c37 1.2% 8.2pf 9.85nh 2% l1 c49 nu l40 27nh r21 91 4 nu c4 6 cr41 hsms2829 io1 1 2 io2 io3 3 ...

  • Page 219

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-43 6881096c25-b june, 2005 5v for 25khz rx back end (overtone) 0v for 12.5khz 3.39v 3.05v 0.74v 1.5v 2.1v when -47 dbm @ antenna 9.1pf 1.1% c53 1 2 3 5v 1 2 3 d51 1 3 2 d52 cr51 c71 if_demod tc7w04f 1 7 0.1uf gnd1 3 4 gn...

  • Page 220

    12-44 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b pre_gn d reference oscillator nu 0.01uf 14r06 nu r202 c206 d201 150k 4.5v unlock: 0v 3v 0v 3v 0v tx: 3v rx: 0v c203 100 c202 3.2v to 4.5v c201 y201 2.7pf 45j68 lock: 3v 62pf nu 220pf crystal nu...

  • Page 221

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-45 6881096c25-b june, 2005 uhf r3 vco 3.2v to 9.5v 4.5v rx: 0v tx: 3v 390pf c275 l264 2% 8nh c265 1.8% 5.6pf 390pf c283 v_sf nc 1sv229 d262 220nh l255 tx_switch 13 vcc_b uffers 14 vcc_logi c 18 r261 22k rx_out 8 rx_switc...

  • Page 222

    12-46 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 0603 uhf r3 tx r162 10k 4.7k r106 1uf c115 l102 7.5nh r120 150 100k 1% r155 nu c114 390pf c107 390pf c171 r102 820 pa_uswb+ 3 tab3 4 tab4 c113 390pf antenna_nut m140 1 tab1 2 tab2 nu c131 l131 ...

  • Page 223

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-47 6881096c25-b june, 2005 audi o dc_regulation microprocessor accessory/keypa d controller connector cntl_5t c50 4 1000pf 1000p f c507 1000pf 1000pf c506 11 c503 spi_d a ta_out sq_det sw_b + vo x vs_audio_sel vs_gain_se...

  • Page 224

    12-48 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b eeprom green led red led microprocessor flash sram nc c413 0.1uf 4.7k r419 91 nu r434 vddsyn 69 vrh 68 vrl 13 vss 40 vssl 87 vssr xfc 93 48 xirq xt al pj4 76 pj5 77 pj6 78 pj7 94 reset 12 vdd 3...

  • Page 225

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-49 6881096c25-b june, 2005 2 5 1 4 6 accessory connector internal speaker 0 not placed not placed not placed not placed audio microphone connector vhf uhf r513 r515 r516 r517 dc level 0.3 - 0.4 v low not placed 0 100k su...

  • Page 226

    12-50 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b 1 2 dc regulation q493 3 100k r322 47pf c301 100 r507 q311 d301 c313 .01uf 150pf c323 u330 tk71730s bypass 4 ctrl 3 gnd 2 1 vin vout 5 .01uf r506 c304 10uf c312 100 c302 390pf 10uf c334 f301 3a...

  • Page 227

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-51 6881096c25-b june, 2005 vddd c3 not placed not placed c6 not placed not placed c8 not placed not placed r14 not placed gnd gnd c1 not placed not placed lcd_sel main board connector gnd r5 not placed r2 not placed data...

  • Page 228

    12-52 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11 c12 c21 c23 c25 c27 c28 c29 c30 c31 c32 c33 c34 c35 c36 c37 c38 c39 c46 c47 c48 c69 c91 c92 c113 c116 c117 c201 c202 c204 c205 c207 c208 c209 c210 c212 c213 c...

  • Page 229

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-53 6881096c25-b june, 2005 c13 c14 c20 c26 c41 c42 c43 c44 c45 c49 c51 c52 c53 c55 c56 c57 c58 c59 c60 c61 c62 c63 c64 c65 c66 c67 c68 c70 c71 c72 c73 c74 c80 c81 c82 c90 c93 c99 c100 c101 c102 c103 c104 c105 c106 c107 c...

  • Page 230

    12-54 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b component side solder side c1 c2 c3 c4 c5 c6 c7 c8 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 g1 g2 9 j1 28 1 g1 g2 j2 4 3 q1 4 3 q2 4 3 q3 4 3 q4 4 3 q5 4 3 q6 4 3 q7 4 3 q8 4 3 q9 4 3 q1...

  • Page 231

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-55 6881096c25-b june, 2005 uhf (465-495 mhz) radio parts list (8486634z02-o) circuit ref motorola part no. Description c1 2109445u32 cap, 8pf c2 2109445u26 cap, 9.1pf c3 2109445u18 cap, 4.3pf c4 2109445u27 cap, 10pf c5 2...

  • Page 232

    12-56 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b c401 2113743m24 cap, 0.1uf c402 2113743l17 cap, 1000pf c403 2113743n50 cap, 150pf c404 2113743l17 cap, 1000pf c405 2113743n50 cap, 150pf c406 2113743n50 cap, 150pf c407 2113743l17 cap, 1000pf c...

  • Page 233

    Uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists 12-57 6881096c25-b june, 2005 r22 0662057m92 res, 5.6k r23 0662057n09 res, 27k r24 0662057m76 res, 1.2k r25 0662057m92 res, 5.6k r40 0662057m74 res, 1k r51 0662057m43 res, 51 r52 0662057n01 res, 12k r53 0662057n11 res, 33k ...

  • Page 234

    12-58 uhf 465-495 mhz (8486634z02-o) schematic diagrams, overlays, and parts lists june, 2005 6881096c25-b * motorola depot servicing only uhf (465-495 mhz) keypad board parts list (8466565a03-b) u52 5109522e10 tc7w04f u110 0186438z02 ra07m4452m_uhf u150 5113818a01 lm2904 u151 2484657r01 57r01 u201*...

  • Page 235: Index

    Index a antenna matching network, uhf 403-440 mhz theory of operation ...............................8-4 antenna matching network, uhf 438-470 mhz theory of operation ...............................9-4 antenna matching network, uhf 465-495 mhz theory of operation .............................10-4 an...

  • Page 236

    June, 2005 6881096c25-b 2 index: d dc power distribution theory of operation........................................................................ 2-1 dc regulation and distribution theory of operation.......................................................... 2-1 disclaimer ..........................

  • Page 237

    6881096c25-b june, 2005 index: 3 keypad, vhf 146-174 mhz theory of operation...............................................................5-7 l list of figures........................................................................................................................ Ix list of tables ....

  • Page 238

    June, 2005 6881096c25-b 4 index: s sensing of externally-connected accessories controller theory of operation.................. 3-3 serial bus control of circuit controller blocks theory of operation................................... 3-2 service aids ...................................................

  • Page 239

    6881096c25-b june, 2005 index: 5 transmitter power amplifier ..............................................................................8-3 antenna switch..................................................................................................8-3 harmonic filter ............................

  • Page 240

    June, 2005 6881096c25-b 6 index: notes for all schematics and circuit boards ......................................................... 7-1 six layer circuit board............................................................................................ 7-3 speaker and microphone schematic ...........

  • Page 241

    6881096c25-b june, 2005 index: 7 y z.

  • Page 242

    June, 2005 6881096c25-b notes: 8 index:.

  • Page 244: Pr400

    Motorola and the stylized m logo are trademarks of motorola, inc. All other product or service names are the property of their respective owners. © 2005 motorola, inc. All rights reserved. Printed in u.S.A. *6881096c25* 6881096c25-b pr400 ™ commercial series portable radio detailed service manual.