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E.F. Johnson Company 761X Service Manual - 761X (Vhf)

Manual is about: VHF-UHF Conventional Mobile FM TWO-WAY RADIO

Summary of 761X

  • Page 1

    First printing november 1998 761x (vhf) 764x (uhf) conventional mobile vhf 146-174 mhz 45 watts part no. 242-7610-0xx uhf 400-430, 450-470, 470-490, 490-512 mhz 35 watts part no. 242-7640-0xx service manual.

  • Page 2: 761X (Vhf)

    761x (vhf) 764x (uhf) conventional fm two-way radio vhf 146-174 mhz 45 watts uhf 400-430, 450-470, 470-490, or 490-512 mhz 35 watts copyright© 1998 by transcrypt international incorporated transcrypt offers communication solutions in two core areas: land mobile radio products and systems, and inform...

  • Page 3

    Table of contents ii november 1998 part no. 001-7600-001 1 general information 1.1 scope of manual . . . . . . . . . . . . . . . . . . . .1-1 1.2 transceiver description . . . . . . . . . . .1-1 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.3 product warranty . . . . ...

  • Page 4

    Table of contents (cont’d) iii november 1998 part no. 001-7600-001 4.5 unique pmr (european) screens . . 4-15 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15 unique pmr screens . . . . . . . . . . . . . . . . . . . . 4-15 4.6 cloning (programming one transceiver with anoth...

  • Page 5

    Table of contents (cont’d) iv november 1998 part no. 001-7600-001 8 schematic diagrams and component layouts vhf (761x) models block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1 transistor and diode basing. . . . . . . . . . . . . . . . .8-2 main unit board bottom view. . . . . ....

  • Page 6

    1-1 november 1998 part no. 001-7600-001 general information section 1 general information 1.1 scope of manual this service manual contains operation, installa- tion, programming, alignment, and service information for the efjohnson® 7610 and 7640 mobile transceiv- ers. 1.2 transceiver description 1....

  • Page 7

    General information 1-2 november 1998 part no. 001-7600-001 5:30 pm. Central time, monday - friday. The customer service department can be reached using one of the following telephone numbers: toll-free: (800) 328-3911 (from within continental united states only) international: (507) 835-6911 fax: (...

  • Page 8

    General information 1-3 november 1998 part no. 001-7600-001 return authorization (ra) numbers are not nec- essary unless you have been given one by the field service department. Ra numbers are required for exchange units or if the field service department wants to be aware of a specific problem. If ...

  • Page 9

    General information 1-4 november 1998 part no. 001-7600-001 this page intentionally left blank..

  • Page 10

    General information 1-5 november 1998 part no. 001-7600-001 7610 (vhf) and 7640 (uhf) mobile specifications the following are general specifications intended for use in testing and servicing this transceiver. For current advertised specifications, refer to the specification sheet available from your...

  • Page 11

    General information 1-6 november 1998 part no. 001-7600-001 notes.

  • Page 12

    2-1 november 1998 part no. 001-7600-001 installation and disassembly section 2 installation and disassembly figure 2-1 installation components optional accessory cable p.N. 585-7600-027 db-9 female optional external speaker p.N. 250-0151-010 10-ft. Power cable red (+) black (–) 20a fuses external sp...

  • Page 13

    Installation and disassembly 2-2 november 1998 part no. 001-7600-001 figure 2-2 mounting bracket installation warning • do not mount the transceiver where it may inter- fere with the operation of vehicle controls. • do not mount the transceiver where the user can- not easily reach the controls and v...

  • Page 14

    Installation and disassembly 2-3 november 1998 part no. 001-7600-001 2. Route the red and black wires from the transceiver to the battery. Connect the red wire to the positive (+) terminal and the black wire to the negative (–) terminal. 3. Plug the cable into the pigtail coming from the trans- ceiv...

  • Page 15

    Installation and disassembly 2-4 november 1998 part no. 001-7600-001 2.6 transceiver disassembly removing bottom cover and front panel 1. Remove the bottom cover by removing four screws (a) as shown in figure 2-4. 2. Remove the front panel by removing two screws (b). Figure 2-4 cover and front panel...

  • Page 16

    Installation and disassembly 2-5 november 1998 part no. 001-7600-001 2.7 2-tone/5-tone module installation 2.7.1 installation procedure 1. Turn power off and disconnect the power cable. 2. Remove the bottom cover by removing the four screws (a) shown in figure 2-5. 3. Install the module as shown in ...

  • Page 17

    Installation and disassembly 2-6 november 1998 part no. 001-7600-001 1. Monitor the transmit signal with a communications monitor. Set it for hpf = off, lpf = 20 khz, de- emphasis = off, and level = (p-p)/2. 2. Select a channel near the center of the band and turn a long tone on (see preceding “note...

  • Page 18

    3-1 november 1998 part no. 001-7600-001 operation section 3 operation figure 3-1 7600 front panel 3.1 features • up to 32 channels programmable • multi-tone (ctcss) and/or multi-code (cdcss) call guard® squelch programmable • vhf and uhf, wideband and narrowband models available • up to 45 watts vhf...

  • Page 19

    Operation 3-2 november 1998 part no. 001-7600-001 3.2 controls and display 3.2.1 front panel controls power switch ( ) - press this switch to turn power on and press and hold it to turn power off. The trans- ceiver may be programmed so that a password must be entered to allow operation. Refer to sec...

  • Page 20

    Operation 3-3 november 1998 part no. 001-7600-001 then ready to be used. To turn power off, press and hold the power switch until power turns off. 3.3.2 entering a password the transceiver may be programmed so that a password must be entered before the transceiver can be used. When power is then tur...

  • Page 21

    Operation 3-4 november 1998 part no. 001-7600-001 3.3.7 bank select two banks of up to 16 channels each can be pro- grammed. Only the channels in the current bank are then selectable. This would allow, for example, groups of channels to be programmed for operation in differ- ent cities. The key is p...

  • Page 22

    Operation 3-5 november 1998 part no. 001-7600-001 • note if the busy indicator ( ) on the front panel is being displayed. If it is not, the channel is not busy and a message can be transmitted. • taking the microphone off-hook disables coded squelch control if it is programmed for the monitor functi...

  • Page 23

    Operation 3-6 november 1998 part no. 001-7600-001 3.5.5 call guard tone select if the transceiver has a key, the call guard (ctcss) tone can be selected. This allows calls to be placed to different mobiles or groups of mobiles and received on different groups than is normal for the channel. Proceed ...

  • Page 24

    Operation 3-7 november 1998 part no. 001-7600-001 3.5.15 scan list programming pressing the key changes the scan list sta- tus of the current channel. Refer to the scan list description in section 3.6.2 for more information. 3.5.16 talk-around select the talk-around mode causes transmissions to occu...

  • Page 25

    Operation 3-8 november 1998 part no. 001-7600-001 the scan lists are user programmable if the key is available. Pressing this key changes the status of the displayed channel in the current scan list only. The display indicates “sc on” if the channel was just added to the scan list and “sc of” if it ...

  • Page 26

    4-1 november 1998 part no. 001-7600-001 programming figure 4-1 programming setup female db9 plug to computer programming cable (includes level convert. Circuit) adapter cable p.N. 585-7600-031 p.N. 585-7500-031 4.1 general 4.1.1 programming setup the following items are required to program this tran...

  • Page 27

    Programming 4-2 november 1998 part no. 001-7600-001 on the disk called adj. The use of this program is described in section 5. These are dos programs, so windows® 3.X, 95, or nt are not required to run them. If the program does not run properly in windows, run it in the dos mode. Before you use the ...

  • Page 28

    Programming 4-3 november 1998 part no. 001-7600-001 4.4.3 screen menu note: the screen menu for pmr (european) models is slightly different than the lmr version shown above. Refer to section 4.5 for more information on pmr models. Memory channel - displays the screen shown in table 4-1 which is used...

  • Page 29

    Programming 4-4 november 1998 part no. 001-7600-001 in the screen menu (see section 4.4.3), memory channel screen (see table 4-1), and dtmf autodial screen (see table 4-3). Pmr - selects pmr (european) models. Selecting this model displays unique parameters for program- ming a 5-tone option. As with...

  • Page 30

    Programming 4-5 november 1998 part no. 001-7600-001 ch atr (channel attribute) press (enter) to display the menu which selects one of the following choices: a: priority a - the channel is selected when the prio a key is pressed, and it is monitored during priority scan. In addition, the microphone h...

  • Page 31

    Programming 4-6 november 1998 part no. 001-7600-001 rf pwr programs the rf power output for the channel (high, low1, low2). This setting can be temporarily or perma- nently overridden by the high, low1, or low2 power option switch if it is programmed (see table 4-2). Lockout transmit disable on busy...

  • Page 32

    Programming 4-7 november 1998 part no. 001-7600-001 table 4-2 key and display assign screen description key assign parameters the and f1-f4 option keys can be programmed for the following functions. Press the (enter) key and then pgup/pgdn to display and then select the desired function. Parameter k...

  • Page 33

    Programming 4-8 november 1998 part no. 001-7600-001 parameter key label description rf att att toggles the receive attenuate function on and off (see section 3.5.13). Lock lock locks/unlocks all programmable keys except call, moni, and emer to prevent them from being accidentally pressed (see sectio...

  • Page 34

    Programming 4-9 november 1998 part no. 001-7600-001 parameter description light enables or disables the display and key backlight. This programming can be overridden by the power-on menu (see section 3.3.4) or lite key (see section 3.3.9). The “auto” configuration allows it to be controlled by pin 1...

  • Page 35

    Programming 4-10 november 1998 part no. 001-7600-001 table 4-4 continuous tone screen description description the continuous tones programmed in this screen are selected by pressing the c.Tone ch ent function key (see table 4-2) and then pressing the up/down keys. This allows the user to select the ...

  • Page 36

    Programming 4-11 november 1998 part no. 001-7600-001 parameter description stop timer when mode 2 or 3 above is programmed (priority scanning), this sets how often in seconds the priority channel is checked while receiving a message on some other channel. Resume timer this sets the scan resume delay...

  • Page 37

    Programming 4-12 november 1998 part no. 001-7600-001 parameter description beep emits (or turns off) the following beeps when receiving a matched 2-tone: null - beep emission (or non-emission) is retained even when receiving a matched 2-tone. Off - repeater beep emission is turned off. Pi (single) -...

  • Page 38

    Programming 4-13 november 1998 part no. 001-7600-001 table 4-7 common screen description parameter description user password programs the password that must be entered at power on if the following “pwr on password” parameter is “on” or to cancel the “stun” condition described in table 4-6. Any four-...

  • Page 39

    Programming 4-14 november 1998 part no. 001-7600-001 parameter description power on password this turns the password function on and off. When it is turned on, “pword” is displayed when power is turned on and a four-digit password must be entered to enable the transceiver (see section 3.3.2). The pa...

  • Page 40

    Programming 4-15 november 1998 part no. 001-7600-001 parameter description emer sw on timer sets the period in seconds that the emergency function key must be pressed to activate the emergency function. An emergency call is initiated by pressing the emergency key for longer than this time. Emer sw o...

  • Page 41

    Programming 4-16 november 1998 part no. 001-7600-001 the following screens selected in the preceding screen menu are unique to pmr models. Refer to on- line help for information on parameters in these screens. Rx code channel - this screen is shown below and it programs the receive 5-tone code infor...

  • Page 42

    Programming 4-17 november 1998 part no. 001-7600-001 4. Connect the master transceiver to the slave (target) transceiver by plugging the cloning cable into the microphone jack of each. 5. Turn the slave transceiver on. Then momentarily press the power switch of the master transceiver to begin the da...

  • Page 43

    Programming 4-18 november 1998 part no. 001-7600-001 this page intentionally left blank..

  • Page 44

    5a-1 november 1998 part no. 001-7600-001 vhf (7610) circuit description note: a vhf transceiver block diagram is located on page 8-1. 5.1 vhf receiver circuit 5.1.1 antenna switching circuit the antenna switching circuit functions as a low- pass filter while receiving and a resonator circuit while t...

  • Page 45

    Vhf (7610) circuit description 5a-2 november 1998 part no. 001-7600-001 figure 5-1 second if system ic3 (vhf) figure 5-2 audio switching and amplifier circuit (vhf) are part of the quadrature detector. The audio signal is fed out on pin 9 (ic3) and applied to the af amplifier circuit. 5.1.5 audio am...

  • Page 46

    Vhf (7610) circuit description 5a-3 november 1998 part no. 001-7600-001 part of the af signal from pin 9 of fm if circuit ic3 is applied to pin 24 of level controller ic5. This device allows the cpu to control the squelch threshold level. The level-controlled output signal on pin 23 is applied to ic...

  • Page 47

    Vhf (7610) circuit description 5a-4 november 1998 part no. 001-7600-001 figure 5-3 pll circuit (vhf) 5.2.5 apc circuit the apc (automatic power control) circuit pro- tects the power amplifier from damage caused by a mismatched antenna load, and provides a stable power output. Detector d2 detects for...

  • Page 48

    Vhf (7610) circuit description 5a-5 november 1998 part no. 001-7600-001 the phase detector determines the phase differ- ence between these signals and then produces output pulses on pin 8 which are filtered by the loop filter. This filter consists of r43-r45, c60, and c61. The output of this filter ...

  • Page 49

    Vhf (7610) circuit description 5a-6 november 1998 part no. 001-7600-001 5.4.3 vhf i/o expander ic5 (main unit) 5.4.4 vhf port expander ic11 (main unit) 51 bm outputs control signal for beep mute cir- cuit q10. High = beep muted. 52- 54 ctda0- ctda2 output port for ctcss/dtcs signals. 55 hang input p...

  • Page 50

    5b-7 november 1998 part no. 001-7600-001 uhf (7640) circuit description section 5b uhf (7640) circuit description note: the uhf transceiver block diagram is located on page 8-6. 5.5 uhf receiver circuit 5.5.1 antenna switching circuit the antenna switching circuit functions as a low- pass filter whi...

  • Page 51

    Uhf (7640) circuit description 5b-8 november 1998 part no. 001-7600-001 figure 5-4 second if system ic1 (uhf) figure 5-5 audio switching and amplifier circuit (uhf) and applied to the limiter amplifier and quadrature detector. The quadrature detector demodulates the audio signal contained in the sec...

  • Page 52

    Uhf (7640) circuit description 5b-9 november 1998 part no. 001-7600-001 part of the af signal from pin 9 of fm if circuit ic1 is applied to pin 24 of level controller ic12. This device allows the cpu to control the squelch threshold level. The level-controlled output signal on pin 23 is applied to i...

  • Page 53

    Uhf (7640) circuit description 5b-10 november 1998 part no. 001-7600-001 figure 5-6 pll circuit (uhf) 5.6.5 apc circuit the apc (automatic power control) circuit pro- tects the power amplifier from damage caused by a mismatched antenna load, and provides a stable power output. One diode in d1 detect...

  • Page 54

    Uhf (7640) circuit description 5b-11 november 1998 part no. 001-7600-001 the phase detector determines the phase differ- ence between these signals and then produces output pulses on pin 8 which are filtered by the loop filter. This filter consists of q34, r180, r181, and c202- c204. The output of t...

  • Page 55

    Uhf (7640) circuit description 5b-12 november 1998 part no. 001-7600-001 5.7.5 uhf i/o expander ic12 (main unit) 5.7.6 uhf port expander ic13 (main unit) 51 bm outputs control signal for beep mute cir- cuit q10. High = beep muted. 52- 54 ctda0- ctda2 output port for ctcss/dtcs signals. 55 hang input...

  • Page 56

    6-1 november 1998 part no. 001-7600-001 adjustment procedure figure 6-1 test setup programming cable part no. 585-7500-031 test cable (fabricated) 13.6 volt, 17a power supply wattmeter load 50 ohm, 50w frequency monitor 4.0 ohm speaker load 6.1 general 6.1.1 suggested test equipment the equipment th...

  • Page 57

    Adjustment procedure 6-2 november 1998 part no. 001-7600-001 figure 6-2 screen display example figure 6-3 test cable schematic dtcs bal level squelch level selected channel info rf power output fm deviation dtcs balance reference frequency supply voltage internal temp pll lock voltage rssi ic5/ic12 ...

  • Page 58

    Adjustment procedure 6-3 november 1998 part no. 001-7600-001 table 6-1 vhf test frequencies test channel tx/rx freq (mhz) power call guard squelch bandwidth [1] 1 174.050 low1 none narrow or wide 2 146.050 low1 none narrow or wide 3 160.050 high none narrow or wide 4 160.050 low2 none narrow or wide...

  • Page 59

    Adjustment procedure 6-4 november 1998 part no. 001-7600-001 in the upper part of the screen is for the currently selected channel. 5. To move the cursor between the parameters on the left side of the bar graph, press the ↑ ↓ arrow keys. To change a parameter, press the ← → , pgup/pgdn, backspace, o...

  • Page 60

    Adjustment procedure 6-5 november 1998 part no. 001-7600-001 figure 6-4 vhf adjustment points 4. Press (enter) again to select the second adjust chan- nel. Key the transmitter and adjust for the displayed frequency. Unkey the transmitter and press (enter) again to exit this function. 6.4.2 output po...

  • Page 61

    Adjustment procedure 6-6 november 1998 part no. 001-7600-001 2. Select the low power channel in the middle of the band (test ch. 5 - 160.050 mhz). On the computer screen, scroll to “mod n” if setting narrow band deviation or “mod w” if setting wideband deviation. 3. Monitor the transmit deviation wi...

  • Page 62

    Adjustment procedure 6-7 november 1998 part no. 001-7600-001 3. Connect an rf signal generator to the antenna jack. Set it to the channel frequency with an output mod- ulated with 1 khz at the following deviation: wideband (30 khz) models - 3.5 khz narrowband (12.5 khz) models - 1.75 khz 4. Scroll t...

  • Page 63

    Adjustment procedure 6-8 november 1998 part no. 001-7600-001 uhf adjustments note: perform the preliminary setup described in section 6.2 before proceeding with these adjustments. 6.6 pll adjustment (uhf models) 1. Remove the bottom cover by removing four screws. Connect a dc voltmeter to check poin...

  • Page 64

    Adjustment procedure 6-9 november 1998 part no. 001-7600-001 figure 6-6 uhf adjustment points 6.7.4 dtcs waveform adjust 1. Select the channel on the low end of the pro- grammed for dtcs code 007n (test ch. 5). 2. On the computer screen, scroll to “dtcs n” if set- ting a narrow band channel or “dtcs...

  • Page 65

    Adjustment procedure 6-10 november 1998 part no. 001-7600-001 6.8 receiver adjustments (uhf models) 6.8.1 bandpass filter adjust 1. Select the channel on the low end of the band (test ch. 1). 2. Connect an rf signal generator to the antenna jack. Set the output for the channel frequency at a level o...

  • Page 66

    7-1 november 1998 part no. 001-7600-001 parts list section 7 parts list 5hiý1rï 'hvfulswlrq 3duwý1rï æçìíýõ9+)ôý0$,1ý81,7 &ííì &hudpý*50éëðçý&.ýíëí&ýèíí37 íëëðêäíçðæäè &ííê &hudpý*50éëðçý&+ýìåí-ýèíí37 íëëðêäíçðæää &ííé &hudpý&ìçíåý&+ýì+ýéæì-ð7ð$ íëëðêäíçðëèë &ííè &hudplfý*50éíý&.ýí5è&ýèí37 íëëðêäíçð...

  • Page 67

    Parts list 7-2 november 1998 part no. 001-7600-001 &íäç &hudplfý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &íäæ &hudplfý&ìçíåý&+ýì+ýìíì-ð7ð$ý íëëðêäíçðíæë &íäå &hudplfý&ìçíåý&+ýì+ýíçí%ð7ð$ý íëëðêäíçðçìè &íää &hudplfý&ìçíåý&+ýì+ýì5è%ð7ð$ íëëðêäíçðíåæ &ìíí &hudplfý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &ìíì &hudplf...

  • Page 68

    Parts list 7-3 november 1998 part no. 001-7600-001 &ìäë &hudplfý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê &ìäé 7dqwdoxpý(&67ì$ íëëðêäíçðçëç &ìäç &hudplfý&ìçíåý-%ýì&ýìíé.7ð1 íëëðêäíçðçìé &ìäæ &hudplfý&ìçíåý-%ýì&ýìíé.7ð1 íëëðêäíçðçìé &ìäå &hudplfý&ìçíåý&+ýì+ýìèí-ð7ð$ íëëðêäíçðíçæ &ìää &hudplfý&ìçíåý-%ýì&ýìíé....

  • Page 69

    Parts list 7-4 november 1998 part no. 001-7600-001 &ëäí &hudplfý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê &ëäì &hudplfý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &ëäë &hudplfý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &ëäê &hudplfý&ìçíåý-%ýì&ýìíé.7ð1 íëëðêäíçðçìé &ëäé &hudplfý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê &ëäè &hudplfý&ì...

  • Page 70

    Parts list 7-5 november 1998 part no. 001-7600-001 /ëæ &rloý0/)ìçíå$ýì5í.ð7 íëëðêäíçðçèç 03ì ýìäëëý9&2ýfdvh íëëðêäíçðæìé 03ë ýìäëëý9&2ýfryhu íëëðêäíçðæìê 03ê ýëíèèý)lowhuýfdvh íëëðêäíçðååí 03é ýëíèèý)lowhuýfryhu íëëðêäíçðååì 03è ý3$ýkroghu íëëðêäíçðååë 03ç ý5xeehuývkhhwýõ$'ô íëëðêäíçðååê 4íì 7udqvlv...

  • Page 71

    Parts list 7-6 november 1998 part no. 001-7600-001 5íéé 5hvý(5-ê*( íëëðêäíçðìêå 5íéè 5hvý(5-ê*( 5íéç 5hvý(5-ê*( 5íéæ 5hvý(5-ê*( 5íéå 5hvý(5-ê*( 5íéä 6ý$55$ íëëðêäíçðæíí 5íèí 5hvý(5-ê*( 5íèì 5hvý(5-ê*( 5íèé 5hvý(5-ê*( 5íèè 5hvý55íåìç5ðæèêð'ýõæèýnýrkpô íëëðêäíçðåçæ 5íèä 5hvý(5-ê*( 5íçí 5hvý(5-ê*( 5íçì...

  • Page 72

    Parts list 7-7 november 1998 part no. 001-7600-001 5ìèé 5hvý(5-ê*( 5ìèè 5hvý(5-ê*( 5ìèç 5hvý(5-ê*( 5ìèæ 5hvý(5-ê*( 5ìèå 5hvý(5-ê*( 5ìèä 5hvý(5-ê*( 5ìçí 5hvý(5-ê*( 5ìçì 5hvý(5-ê*( 5ìçë 5hvý(5-ê*( 5ìçê 5hvý(5-ê*( 5ìçé 5hvý(5-ê*( 5ìçè 5hvý(5-ê*( 5ìçç 5hvý(5-ê*( 5ìçæ 5hvý(5-ê*( 5ìçå 5hvý(5-ê*( 5ìçä 5hvý...

  • Page 73

    Parts list 7-8 november 1998 part no. 001-7600-001 5ëèë 5hvý(5-ê*( :ì -xpshuý(5'6ë7í íëëðêäíçðåææ :ç -xpshuý(5-ê*(ý-3:ý9 íëëðêäíçðìåè :æ &deohý23&ðéèê íëëðêäíçðåæå ;ì &u\vwdoý&5ðèæèýõìèïêý0+]ô íëëðêäíçðåæä ;ê 'lvfulplqdwruý&'%&$éèí&;ëé íëëðêäíçðçéë 5hiý1rï 'hvfulswlrq 3duwý1rï æçéíýõ8+)ôý0$,1ý81,7 &...

  • Page 74

    Parts list 7-9 november 1998 part no. 001-7600-001 &íêì &hudplfý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &íêë &hudplfý&ìçíåý&+ýì+ýë5è%ð7ð$ý õéííðéêíý0+]ô íëëðêäíçðíæì &hudplfý&ìçíåý&+ýì+ýì5è%ð7ð$ý õéèíðéæíý0+]ô íëëðêäíçðíåæ &hudplfý&ìçíåý&+ýì+ýíëí%ð7ð$ý õéæíðéäíý0+]ô íëëðêäíçðíåç &hudplfý&ìçíåý&+ýì+ýíìí%ð7...

  • Page 75

    Parts list 7-10 november 1998 part no. 001-7600-001 &íäé &hudplfý+0çí6-ý&+ýíêí'ýèíí9ý õéííðéêíý0+]ô íëëðêäíçðäêë &hudplfý+0çí6-ý&+ýíçí'ýèíí9ý õéèíðéæíý0+]ô íëëðêäíçðäêí &hudplfý+0çí6-ý&+ýíéí&ýèíí9ý õéæíðéäíý0+]ô íëëðêäíçðäëå &hudplfý+0çí6-ý&.ýíëí&ýèíí9ý õéäíðèìëý0+]ô íëëðêäíçðäêì &íäè (ohfwuro\wlfý(...

  • Page 76

    Parts list 7-11 november 1998 part no. 001-7600-001 &ìèí &hudplfý&ìçíåý8-ýì+ýìíí'ð7ð$ý õéííðéêíý0+]ô íëëðêäíçðäìë &hudplfý&ìçíåý8-ýì+ýíåí'ð7ð$ý õéèíðéæíý0+]ô íëëðêäíçðäíå &hudplfý&ìçíåý8-ýì+ýìèí-ð7ð$ý õéæíðéäíý0+]ô íëëðêäíçðíæé &hudplfý&ìçíåý8-ýì+ýíéí&ð7ð$ý õéäíðèìëý0+]ô íëëðêäíçðçíé &ìèì &hudplfý&ì...

  • Page 77

    Parts list 7-12 november 1998 part no. 001-7600-001 &ëëä &hudplfý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &ëêí &hudplfý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &ëêì &hudplfý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &ëêë &hudplfý&ìçíåý-%ýì(ýìíê.ð7ð$ íëëðêäíçðíçê &ëêê &hudplfý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &ëêé &hudplfý...

  • Page 78

    Parts list 7-13 november 1998 part no. 001-7600-001 &êëç &hudplfý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &êëæ &hudplfý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &êëå &hudplfý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &êëä &hudplfý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &êêí &hudplfý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &êêì &hudplfý...

  • Page 79

    Parts list 7-14 november 1998 part no. 001-7600-001 /íë &rloý/$ðêåëýõéäíðèìëý0+]ýrqo\ô íëëðêäíçðäèë &rloý/$ðëêëýõrwkhuýedqgvô íëëðêäíçðäèì /íê &rloý/$ðêåë íëëðêäíçðäèë /íé &rloýêê&6ð èìëý0+]ýrqo\ô íëëðêäíçðäæë &rloýêê&6ð õrwkhuýedqgvô íëëðêäíçðçæí /íè &rloýêê&6ð íëëðêäíçðçæí /íç &rloý/:ðëè íëëðêäíçð...

  • Page 80

    Parts list 7-15 november 1998 part no. 001-7600-001 4êæ 7udqvlvwruý'7&ìéé(8ý7ìíæ íëëðêäíçðíêå 4êå 7udqvlvwruý'7&ìéé(8ý7ìíæ íëëðêäíçðíêå 4êä 7udqvlvwruý'7&ìéé(8ý7ìíæ íëëðêäíçðíêå 4éí )(7ýë6-ìééð*5ýõ7(åè5ô íëëðêäíçðææê 4éì 7udqvlvwruý'7&êçê(.ý7ìéæ íëëðêäíçðææë 4éë 7udqvlvwruý'7&ìéé(8ý7ìíæ íëëðêäíçðíêå...

  • Page 81

    Parts list 7-16 november 1998 part no. 001-7600-001 5íæé 5hvý(5-ê*( 5íæè 5hvý(5-ê*( 5íæç 5hvý(5-ê*( 5íææ 5hvý(5-ê*( 5íæå 5hvý(5-ê*( 5íæä 5hvý(5-ê*( 5íåí 5hvý(5-ê*( 5íåì 5hvý(5-ê*( 5íåë 5hvý(5-ê*( 5íåê 5hvý(5-ê*( 5íåé 5hvý(5-ê*( 5íåè 5hvý(5-ê*( 5íåç 5hvý(5-ê*( 5íåæ 5hvý(5-ê*( 5íäé 5hvý(5-ê*( 5íäè 5hv...

  • Page 82

    Parts list 7-17 november 1998 part no. 001-7600-001 5ìçå 5hvý(5-ê*( 5ìçä 5hvý(5-ê*( 5ìæí 5hvý(5-ê*( 5ìæë 5hvý(5-ê*( 5ìæê 5hvý(5-ê*( 5ìæé 5hvý(5-ê*( 5ìæè 5hvý(5-ê*( 5ìæç 5hvý(5-ê*( 5ìææ 5hvý(5-ê*( 5ìæå 5hvý(5-ê*( 5ìæä 5hvý(5-ê*( 5ìåí 5hvý(5-ê*( 5ìåì 5hvý(5-ê*( 5ìåë 5hvý(5-ê*( 5ìåé 5hvý(5-ê*( 5ìåè 5hv...

  • Page 83

    Parts list 7-18 november 1998 part no. 001-7600-001 5ëæì 5hvý(5-ê*( 5ëæë 5hvý(5-ê*( 5ëæê 5hvý(5-ê*( 5ëæé 5hvý(5-ê*( 5ëæè 5hvý(5-ê*( 5ëæç 5hvý(5-ê*( 5ëææ 5hvý(5-ê*( 5ëæå 5hvý(5-ê*( 5ëæä 5hvý(5-ê*( :íë -xpshuý(5'6ë7í íëëðêäíçðåææ :íç &deohý23&ðéèê íëëðêäíçðåæå :íæ -xpshuý(5-ê*(ý-3:ý9 íëëðêäíçðìåè :íå ...

  • Page 84

    Parts list 7-19 november 1998 part no. 001-7600-001 &çè &hudpý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &çç &hudpý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &çæ &hudpý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &çä &hudpý&ìçíåý-%ýì+ýìíë.ð7ð$ íëëðêäíçðíçí &æí &hudpý&ìçíåý&+ýì+ýéæí-ð7ð$ íëëðêäíçðçíí &æì &hudpý&ìçíåý&+ýì+ýéæí-ð7...

  • Page 85

    Parts list 7-20 november 1998 part no. 001-7600-001 5éì 5hvý(5-ê*( 5éë 5hvý(5-ê*( 5éê 5hvý(5-ê*( 5éé $uud\ý(;%ð9å9ýìíë-9 íëëðêäíçðæíí 5éè $uud\ý(;%ð9å9ýìíë-9 íëëðêäíçðæíí 5éç $uud\ý(;%ð9å9ýìíë-9 íëëðêäíçðæíí 5éæ $uud\ý(;%ð9å9ýìíë-9 íëëðêäíçðæíí 5éå $uud\ý(;%ð9å9ýìíë-9 íëëðêäíçðæíí 5éä 5hvý(5-ê*( 5èí...

  • Page 86

    7-21 november 1998 part no. 001-7600-001 mp2 (c) mp3 (c) mp2 (f) ds1 (f) ep2 (f) mp1 (f) front unit w3 (f) j1 (f) mp7 (c) mp1 (c) mp7 (c) mp7 (c) mp4 (m) mp1 (m) mp2 (m) mp13 (c) mp7 (c) mp5 (m) mp6 (c) mp7 (c) mp11 (c) mp12 (m) w7 (m) j5 (m) mp6 (c) mp5 (c) main unit (bottom side) mp3 (m) mp7 (c) j...

  • Page 87

    Uhf (7640) exploded view 7-22 november 1998 part no. 001-7600-001 ← ← ← ← foldout (vhf exploded view).

  • Page 88

    Section 8 - schematic diagrams and component layouts 5v 5v 8 7 6 5 4 3 2 1 bal ref t4 t3 t2 t1 af dtcs ic5 sck so plst unlk 5v x1 or x2 nwc r5 l26.L27 2nd lo pll ic ref osc bal ref fm det ic3 nois sd fi3.Fi4 or fi5 nwc ceramic bpf bpf x3 disc ic2 loop fil vco 5v 5v c60.C61 q7.Q8 d7.D8 l14 q10 q5 rip...

  • Page 89

    Vhf (7610) transistor basing diagrams vhf (7610) diode basing diagrams 8-2 november 1998 part no. 001-7600-001.

  • Page 90

    8-3 november 1998 part no. 001-7600-001 vhf (7610) main board bottom view foldout →.

  • Page 91

    8-4 november 1998 part no. 001-7600-001 vhf (7610) main board top view.

  • Page 92

    8-5 november 1998 part no. 001-7600-001 vhf (7610) main board schematic 15.3mhz 3.6v 2.2v rx:1.2v rx:0v rx:0.63v rx:4.7v rx:0v 7.7v tx:0v rx:5.0v tx:5.0v rx:0v 13.2v 5.0v (pmr) lmr (only) 13.2v 5.0v 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ic2 µpd3140gs vcc1 in1 enb clk data t1 lok cp1 fi1...

  • Page 93

    8-6 november 1998 part no. 001-7600-001 for rev d1 t8v r8v q1 q2 rfatt t1 t2 d3,d4,d5 d7 d8 r8v r8v q3 q4 d13 n/w sw n/w sw n/w sw t3 t4 d9 d10 fi1 46.35mhz x1 fi2 fi3 nwc d12 q5 det afout ic6c,d q22 5v 5v b ic4a 8v rmut txc ic12 ic11 ic11 q32 ic9 hv j1 1 2 j2 h g mic afo micin micout 5v ic8b a mmut...

  • Page 94

    8-7 november 1998 part no. 001-7600-001 uhf (7640) main board bottom view foldout →.

  • Page 95

    8-8 november 1998 part no. 001-7600-001 c 1 9 4 r 6 5 r 1 1 3 r 1 1 2 q 1 7 r 6 6 r 6 9 c 9 2 c 9 1 m p 1 0 d 2 8 d 1 6 j6 w 6 w 6 r e d b l k c 1 9 6 r 1 7 3 c 1 9 5 c 8 4 q 1 8 q 1 4 ic 3 c 8 1 i o c 7 9 c 1 0 1 l1 7 c 3 0 4 l 1 9 r 7 0 c 1 0 0 c 8 0 c 7 4 ic 2 ic 9 c 7 6 c 7 0 q 1 2 q 1 3 d e t w...

  • Page 96

    8-9 november 1998 part no. 001-7600-001 uhf (7640) main board schematic 5 6 7 8 9 10 15 14 13 12 opt2 opt1 aux mic in sig out opv1 opv2 opv3 busy mic out ptt out ptt in 3 2 1 4 11 opt3 gnd 16 j4 17 18 19 20 21 22 23 24 25 26 27 28 29 30 sck si so opint opcs af out det rxmut af on mimut hv 5v gnd to ...

  • Page 97

    8-10 november 1998 part no. 001-7600-001 p2 p3 p1 p0 v-dn v-up dn up ds4 ds3 ds2 ds5 ds7 ds6 ds8 pwr ds9 ds1 ds10 j1 ds1 1 2 r60 1 2 7 8 j1 (to microphone) 1 - 8v 3 - afo 5 - mice 7 - gnd 2 - clone 4 - ptt 5 - mic 7 - hanger r51 r52 c1 r61 c16 c73 c11 r53 r5 c18 c19 r7 r8 c13 r63 c21 c79 r64 r62 c14...

  • Page 98

    8-11 november 1998 part no. 001-7600-001 light on :7.5v light off:5.5v 5.0v 5.0v 4.9v 3.9v 1.7v 5.0v 7.6v 5.0v measurement conditions digital multimeter:50k Ω /vdc oscilloscope :20mhz 3.2v 2.3v 1.4v 6.8mhz 4.2v 2.3v 0.4v dtcs 0.7v ctcss 2.35v 4.0v 0mv -70mv 70mv 27.5mv beep is set -27.5mv 0mv 3.3v 0...

  • Page 99

    8-12 november 1998 part no. 001-7600-001 2sb1132 r (symbol: barb) 2sb1143 s 2sc4081 r (symbol: br) 2sc4215 o (symbol: qo) 2sc4703 se (symbol: se) • transistors and fet's 2sc5107 o (symbol: mf) 2sc5110 o (symbol: mgo) 2sd1664 q (symbol: da) 2sj144 gr (symbol: vg) 2sj377 (symbol: 4l) 2sk241 r (tx) 2sk...