Kenwood TK-760HG Service Manual Download

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VHF FM TRANSCEIVER

TK-760HG/762HG

SERVICE MANUAL

REVISED

Microphone
(T91-0621-05)

Cabinet (Upper)
(A01-2165-13)

Panel assy
(A62-0642-03)

Key top
(K29-5343-02)

Microphone
(T91-0621-05)

Cabinet (Upper)
(A01-2165-13)

Panel assy
(A62-0731-03)

Key top
(K29-5344-02)

TK-760HG (K)

TK-762HG (K)

This service manual is the same as the K and M market, TK-760HG/
762HG (B51-8538-00) service manual with the exception of new K2
market.

Summary of Contents for TK-760HG

Page 1: ...21 05 Cabinet Upper A01 2165 13 Panel assy A62 0642 03 Key top K29 5343 02 Microphone T91 0621 05 Cabinet Upper A01 2165 13 Panel assy A62 0731 03 Key top K29 5344 02 TK 760HG K TK 762HG K This service manual is the same as the K and M market TK 760HG 762HG B51 8538 00 service manual with the exception of new K2 market ...

Page 2: ...5950 XX B 2 37 SCHEMATIC DIAGRAM 41 BLOCK DIAGRAM 49 LEVEL DIAGRAM 52 TERMINAL FUNCTION 54 SPECIFICATIONS 55 Service Manual List Title Parts number Remarks Destination TX RX unit PCB number TK 760G 762G B51 8497 10 REVISED TK 760G K K2 M J72 0677 02 TK 762G K K2 TK 760HG 762HG B51 8538 00 SUPPLEMENT TK 760HG K M J72 0759 02 TK 762HG K TK 760HG 762HG B51 8538 10 REVISED TK 760HG K K2 M J72 0759 12 ...

Page 3: ...th the key and SCN key Emergency Pressing this key for longer than 1 second causes the transceiver to enter the emergency mode The transceiver jumps to the programmed Emergency the group and chan nel and transmits for 25 seconds The transceiver disables mic mute while transmitting After finishing transmission the transceiver receivers for 5 seconds The transceiver mutes the speaker while receiv in...

Page 4: ...he CH key If the CH key is pressed while CLN LOCK is displayed numbers 0 to 9 are displayed flashing When you press the SCN key the currectly selected number is determined and the display shifts to the left If you press the SCN key after entering the password in this proce dure CLONE is displayed if the entered password is correct If the password is incorrect CLN LOCK is redisplayed 4 Power on the...

Page 5: ...the car ignition key If you use the Horn Alert function or the Manual Relay function you can turn the function off while driving with the ignition key Connecting the KCT 18 to the Transceiver 1 Install the KCT 19 in the transceiver 2 Insert the KCT 18 lead terminal into pin 3 of the square plug supplied with the KCT 19 then insert the square plug into the KCT 19 connector 2 1 3 Fig 1 Modifying the...

Page 6: ... KCT 19 Terminal 6 Earth 10 HR1 12 PA HR2 Fig 6 Modifying the Transceiver Horn alert The signal from pin 4 of IC9 on the TX RX unit turns Q5 and Q1 on and off and drives KAP 1 HA relay K2 to drive the horn with a maximum of 2A The default output is HR1 The relay open output can be obtained between HR1 and HR2 by removing R1 in the KAP 1 R1 Output form HR1 Default Enable HR2 Disable HR1 HR1 HR2 R1 ...

Page 7: ...tion R705 Attach R92 1252 05 0Ω TX RX unit A 2 RF section R142 Remove RK73GB1J473J 47kΩ Once the transceiver is modified it cannot be turned on and off with the power switch The power switch turns the LCD backlight and display on and off The power is switched on and off by IGNITION SENSE IC502 CPU 6 Q506 87 88 25 20 R705 Attach 0 Power switch MBL MBL SB Q505 Key backlight LCD IC510 1 3 CN5 R142 47...

Page 8: ...CASE 33 1H 2H H25 0720 04 PROTECTION BAG 200X350 34 3H H52 1653 02 ITEM CARTON CASE 36 2G J19 1584 05 HOLDER ACC 37 2A 2D J21 8382 03 HARDWARE FIXTURE 38 1G J29 0627 23 BRACKET 40 2A K29 5343 02 KEY TOP 760 40 2D K29 5344 02 KEY TOP 762 A 2A 2D N33 2606 45 OVAL HEAD MACHINE SCREW B 2C 2F N67 3008 46 PAN HEAD SEMS SCREW C 2B 2E N87 2606 46 BRAZIER HEAD TAPTITE SCREW D 2B 2E N87 2612 46 BRAZIER HEAD...

Page 9: ...96 CK73GB1H102K CHIP C 1000PF K C97 C92 0546 05 CHIP TAN 68UF 6 3WV C98 CK73GB1H103K CHIP C 0 010UF K C99 C92 0004 05 CHIP TAN 1 0UF 16WV C100 CK73GB1H102K CHIP C 1000PF K C101 CC73GCH1H040C CHIP C 4 0PF C C102 103 CK73GB1H102K CHIP C 1000PF K C104 C92 0002 05 CHIP TAN 0 22UF 35WV C105 CK73GB1H102K CHIP C 1000PF K C106 CC73GCH1H180J CHIP C 18PF J C107 CK73GB1H102K CHIP C 1000PF K C110 CC73GCH1H180...

Page 10: ...2 C248 C92 0585 05 CHIP TAN 4 7UF 16WV C251 CK73GB1H102K CHIP C 1000PF K K2 C252 CK73GB1C104K CHIP C 0 10UF K K2 C259 CK73GB1C104K CHIP C 0 10UF K C265 CK73GB1H102K CHIP C 1000PF K K2 C270 CK73GB1C104K CHIP C 0 10UF K C271 CK73GB1H472K CHIP C 4700PF K C274 CK73GB1C104K CHIP C 0 10UF K C276 CK73GB1H102K CHIP C 1000PF K K2 C501 CK73GB1H102K CHIP C 1000PF K C502 CK73GB1C104K CHIP C 0 10UF K C503 CK73...

Page 11: ... SMALL FIXED INDUCTOR 0 33UH L5 L34 4530 05 COIL L6 L40 1581 86 SMALL FIXED INDUCTOR 0 15UH L7 L40 4785 85 SMALL FIXED INDUCTOR 0 47UH L8 L40 8285 85 SMALL FIXED INDUCTOR 0 82UH L9 L40 1085 77 SMALL FIXED INDUCTOR 100NH L10 L40 6875 77 SMALL FIXED INDUCTOR 68NH L11 L34 4472 05 COIL L12 L40 3375 34 SMALL FIXED INDUCTOR 33NH L13 L34 4473 05 COIL L14 L40 6875 34 SMALL FIXED INDUCTOR 68NH L15 L34 4473...

Page 12: ...1J473J CHIP R 47K J 1 16W R98 RK73GB1J223J CHIP R 22K J 1 16W R99 RK73GB1J271J CHIP R 270 J 1 16W R100 101 RK73GB1J101J CHIP R 100 J 1 16W R103 RK73GB1J472J CHIP R 4 7K J 1 16W R105 RK73GB1J470J CHIP R 47 J 1 16W R106 RK73GB1J222J CHIP R 2 2K J 1 16W R107 RK73GB1J473J CHIP R 47K J 1 16W R108 RK73GB1J181J CHIP R 180 J 1 16W K M R108 RK73GB1J271J CHIP R 270 J 1 16W K2 R109 RK73GB1J102J CHIP R 1 0K J...

Page 13: ... CHIP R 0 OHM R528 RK73GB1J472J CHIP R 4 7K J 1 16W R529 RK73GB1J154J CHIP R 150K J 1 16W R530 RK73GB1J473J CHIP R 47K J 1 16W R531 RK73GB1J394J CHIP R 390K J 1 16W R532 RK73GB1J103J CHIP R 10K J 1 16W R533 RK73GB1J104J CHIP R 100K J 1 16W R534 RK73GB1J823J CHIP R 82K J 1 16W R535 RK73GB1J103J CHIP R 10K J 1 16W R536 RK73GB1J153J CHIP R 15K J 1 16W R537 RK73GB1J105J CHIP R 1 0M J 1 16W R538 RK73GB...

Page 14: ...40 MA742 DIODE D41 HZU5ALL DIODE D501 504 MA2S111 DIODE D505 MA2S111 DIODE 762 D506 507 MA2S111 DIODE D508 MA742 DIODE D523 DAN202U DIODE D524 525 HSB123 DIODE TX RX UNIT X57 5950 XX D526 1812L075PR VARISTOR D527 528 HSB123 DIODE D529 MA742 DIODE IC1 2 TA75S01F IC OP AMP IC3 MB15A02 IC PLL IC4 NJM4558M IC OP AMP X2 IC5 TA31136FN IC FM IF DETECTOR IC6 M62363FP IC 8bit D A CONVERTOR IC7 NJM2904M IC ...

Page 15: ...3GCH1H090D CHIP C 9 0PF D C122 CC73GCH1H0R5B CHIP C 0 5PF B C123 CK73GB1H471K CHIP C 470PF K C124 CC73GCH1H0R5B CHIP C 0 5PF B C125 CK73GB1H102K CHIP C 1000PF K C126 CK73GB1H471K CHIP C 470PF K C127 CC73GCH1H100D CHIP C 10PF D TC106 C05 0384 05 CERAMIC TRIMMER CAP 10PF TC109 C05 0384 05 CERAMIC TRIMMER CAP 10PF CN101 E40 6019 05 PIN ASSY F10 2279 04 SHIELDING CASE L101 104 L40 1595 34 SMALL FIXED ...

Page 16: ... A B C 1 24 3 24 2 40 37 7 11 6 17 22 22 23x2 27 24 9 25 14 12 21x2 44 26 IC400 16 701 702 Cx2 703 A C C Cx2 Dx11 B B A Ax2 703 TX RX unit X57 595 B 2 TX RX unit X57 595 A 2 Display unit X54 327 704 A M2 6 x 6 OC BLK N33 2606 45 B M3 x 8 N67 3008 46 C M2 6 x 6 Br Tap N87 2606 46 D M2 6 x 12 Br Tap N87 2612 46 ...

Page 17: ...21x2 44 26 IC400 16 701 702 Cx2 703 C C Cx2 Dx11 B B A A Ax2 703 TX RX unit X57 595 B 2 TX RX unit X57 595 A 2 Display unit X54 328 704 A M2 6 x 6 OC BLK N33 2606 45 B M3 x 8 N67 3008 46 C M2 6 x 6 Br Tap N87 2606 46 D M2 6 x 12 Br Tap N87 2612 46 Parts with the exploded numbers larger than 700 are not supplied ...

Page 18: ... Warranty card 13 DC cord E30 3339 05 19 Fuse F51 0017 05 x 2 30 Polystyrene foamed fixture F H10 6628 02 31 Polystyrene foamed fixture R H10 6629 02 32 Inner packing case H12 1391 03 33 Protection bag H25 0720 04 33 Protection bag H25 0720 04 34 Item carton case H52 1653 02 36 Holder J19 1584 05 38 Bracket J29 0627 23 42 Screw set N99 0395 05 45 Microphone T91 0621 05 K K2 ...

Page 19: ...hannel TK 760HG 762HG K2 No RX TX 1 Center 149 050 149 100 2 Low 136 050 136 100 3 High 161 950 161 900 4 149 000 149 000 5 149 200 149 200 6 149 400 149 400 7 16 Signalling Signalling No RX TX 1 None None 2 None 100Hz square 3 QT 67 0Hz QT 67 0Hz 4 QT 151 4Hz QT 151 4Hz 5 QT 210 7Hz QT 210 7Hz 6 QT 250 3Hz QT 250 3Hz 7 DQT D023N DQT D023N 8 DQT D754I DQT D754I 9 DTMF DEC 159D DTMF ENC 159D 10 Non...

Page 20: ...fine deviation Narrow A _ F Q T_XXX QT fine deviation C _ F Q T _ XXX QT fine deviation H FDQT_XXX DQT fine deviation Wide F DQT_XXX DQT fine deviation L FDQT_XXX DQT fine deviation Narrow A F D Q T_XXX DQT fine deviation C F D Q T _ XXX DQT fine deviation H SENS_XXX Seisitivity S ENS_XXX Sensitivity L A S E N S_XXX Sensitivity C S E N S _ XXX Sensitivity H DTMF_XXX DTMF fine deviation Wide DTMF_X...

Page 21: ...ensitivity Frequency Range 10Hz to 1000MHz Frequency Counter Frequency Stability 0 2ppm or less 7 Ammeter 20A 8 AF Volt Meter Frequency Range 50Hz to 10kHz AF VTVM Voltage Range 1mV to 10V 9 Audio Generator AG Frequency Range 20Hz to 20kHz or more Output 0 to 1V 10 Distortion Meter Capability 3 or less at 1kHz Input Level 50mV to 10Vrms 11 4Ω Dummy Load Approx 4Ω 10W or more 12 Regulated Power Sup...

Page 22: ...quelch etc for the EEPROM is stored in memory When parts are changed readjust the transceiver Repair Jig Chassis Use jig Part No A10 4010 02 for repairing the TK 760HG 762HG The jig facilitates the voltage check when the voltage on the component side TX RX unit is checked during repairs Extension cable Part No E30 3404 05 L13 L11 L18 L15 L5 RSSI TX RX UNIT A 2 PLL VCO TC106 CV TC109 Power LED Volu...

Page 23: ... AF output 1V 4Ω 2 S ENS Front CH Adjust panel SSG freq 148 050MHz K 136 050MHz K2 146 050MHz M 3 S E N S _ Adjust SSG freq 173 950MHz K M 161 950MHz K2 3 Squelch 3 1 Set test mode Adjust to the Wide Select SQL3 in tuning mode squelch threshold S QL3 point Adjust SSG freq 148 050MHz K 136 050MHz K2 146 050MHz M SSG output 127dBm 0 1µV SSG MOD 3kHz Wide 1 5kHz Narrow 2 S Q L 3 Adjust SSG freq 161 0...

Page 24: ...0MHz K 136 050MHz K2 146 050MHz M SSG output 114dBm 0 44µV SSG MOD 3kHz Wide 1 5kHz Narrow 2 S Q L 9 Adjust SSG freq 161 050MHz K 149 050MHz K2 160 050MHz M 3 S Q L 9 _ Adjust SSG freq 173 950MHz K M 161 950MHz K2 Narrow 4 SQL9 Adjust SSG freq 161 050MHz K 149 050MHz K2 160 050MHz M 5 Squelch 1 Set test mode Check Squelch must be opened check CH CH1 Sig1 CH3 Sig1 Wide Narrow SSG output 118dBm 0 28...

Page 25: ... POW Adjust 256 PTT ON 3 High power 1 Set test mode 50 0W 2 0W Select HPOW in tuning mode H POW PTT ON Adjust 2 H P OW PTT ON Adjust 3 H P O W PTT ON Adjust 4 H P O W 45 0W K M 2 0W PTT ON 50 0W K2 Adjust 5 H P O W _ 45 0W PTT ON Adjust 4 Low power 1 Set test mode Power meter 10 0W 1 0W Select LPOW in tuning mode L POW PTT ON Adjust 2 L P OW PTT ON Adjust 3 L P O W PTT ON Adjust 4 L P O W PTT ON A...

Page 26: ... B A L _ PTT ON Adjust Narrow 4 _BAL PTT ON Adjust 7 Maximum 1 Set test mode 3 95kHz Wide 50Hz Wide Narrow deviation Connect AG to the MIC 1 95kHz Narrow Wide terminal According to the Select MAX in tuning mode larger _ MAX AG 1kHz 50mV Deviation meter filter LPF 15kHz HPF OFF De emphasis OFF PTT ON Adjust 2 _ M A X PTT ON Adjust 3 _ M A X _ PTT ON Adjust Narrow 4 _MAX PTT ON Adjust 8 MIC 1 Set te...

Page 27: ...Hz deviation Select FDQT in tuning mode panel Wide F DQT Deviation meter filter LPF 3kHz HPF OFF PTT ON Adjust 2 F D Q T PTT ON Adjust 3 F D Q T _ PTT ON Adjust Narrow 4 FDQT 0 36kHz 40Hz PTT ON Adjust 11 DTMF 1 Set test mode Front CH 3 0kHz 0 2kHz deviation Select DTMF in tuning mode panel Wide Deviation meter filter LPF 15kHz HPF OFF PTT ON Adjust Narrow 2 DTMF 1 5kHz 0 1kHz PTT ON Adjust 12 TON...

Page 28: ...2 CN801 MBL 5C CE CL E E SB DI 1 2 7 8 C801 C802 C803 C804 C805 C806 C807 D801 D808 IC801 B C E Q801 R801 R802 R803 R804 R805 R806 R808 R809 L801 1 16 17 32 48 49 64 33 D804 D803 D805 D802 J72 0683 02 CN801 1 MBL 5C CE CL E E SB DI 2 7 8 C801 C802 C803 C804 C805 C806 C807 D801 D808 IC801 B C E Q801 R801 R802 R803 R804 R805 R806 R808 R809 L801 1 16 17 32 48 49 64 33 Component side Foil side ...

Page 29: ...1 C118 C111 C123 C117 D105 R116 C110 R101 R102 TC106 L101 TC109 R117 R106 R104 R105 C113 C124 R112 R113 L102 C112 D101 D102 D103 D104 L108 L107 Q101 G S D G S D Q103 L105 L103 L104 C102 C126 C120 C119 R110 C125 R107 C115 C104 C105 R103 R108 C116 L110 L109 C122 R115 R109 R114 R111 Q102 Q104 Q105 Q106 L106 C127 L111 L116 L112 CN101 RX ST HT E 8CL MD CV 1 6 J72 0676 02 L103 L104 C102 C126 C120 C119 R...

Page 30: ...2 C114 C195 C30 C35 C47 C63 L23 Q8 R188 Q37 R193 D40 L26 C271 Q38 R197 L5 TP1 C77 R208 TV 8R CV J72 0759 12 A 2 A1 X58 4670 XX 8CL 1 10 11 20 1 8 9 16 G O I 1 4 5 8 1 12 13 24 5C G S D 1 4 5 8 SB GND DEO DTC IGN DI ME MI PTT SQ 1 8 RSSI GND E C B O G I GND B J1 EXT SP CN7 1 3 PA LI SPI SPO CN8 2 1 E 10 SP CN3 SB E HOR 3 1 1 1 3 AM MM EMG TXS G D S CN1 15 1 GND MIO MII AFI AFO ALT AUX2 AUX4 AUX1 AU...

Page 31: ... C163 R220 R154 R176 R179 R172 R219 C154 C164 R124 R181 R180 R164 C216 R171 R167 Q27 R147 R161 C167 C175 C136 C155 C62 C56 L4 L2 L3 C49 C146 C241 R182 R183 R184 C122 C173 C185 C194 C201 C218 C22 C51 C53 D8 D10 D18 D23 TV D28 D30 D31 IC2 Q10 Q31 X1 R186 C248 L33 L34 D39 R189 R190 R192 L27 C259 R42 R35 R185 R196 PC Q36 R55 R210 R140 ANT J72 0759 12 A 2 G1 S G2 D G1 S G2 D RX ST HT E 8CL MD CV 1 3 4 ...

Page 32: ...Q R S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C91 C67 R93 C104 Q32 L24 L20 L25 IC5 IC6 IC3 C10 C7 C3 C60 C107 C75 Q9 C54 XF1 CN4 CN5 C50 C131 C117 C161 C160 R68 C74 Q35 C46 C43 R44 IC4 R78 IC7 C103 C98 C81 R71 Q12 C93 C99 C1 C5 C8 C11 C2 C6 C9 R201 C141 C144 C134 IC12 C32 C203 C207 C210 C212 L18 C213 L15 C138 D37 C211 L13 L11 C86 C64 CF2 CF1 R87 C96 C97 C16 C17 C18 C19 C21 C15 C14 C13 R9 R10 R11 R59 R19 ...

Page 33: ...4 R538 C521 R555 R592 R519 C508 R514 R572 D521 R602 C603 C609 C605 C601 C599 C613 C503 IC503 G I O C507 R529 R536 C524 R556 C526 C626 C628 R616 R539 C580 R531 C523 C538 R534 R518 R510 R532 R537 C520 R551 C532 R540 R541 C630 C631 D529 R622 IC501 1 16 17 32 IC510 1 CNT CK 8 9 16 C501 R505 IC507 1 4 5 8 C543 R560 R562 C541 R563 R564 R561 C542 C537 D514 A TK 760HG MON TK 762HG D A TK 760HG TK 762HG TK...

Page 34: ...C580 R531 C523 C538 R534 R518 R510 R532 R537 C520 R551 C532 R540 R541 C630 C631 D529 R622 IC501 1 16 17 32 IC510 1 CNT CK 8 9 16 C501 R505 IC507 1 4 5 8 C543 R560 R562 C541 R563 R564 R561 C542 C537 D514 A TK 760HG MON TK 762HG D A TK 760HG TK 762HG TK 760HG TK 762HG TK 760HG A TK 762HG SCN TK 760HG CH DN CH UP C517 E MBL 5C LCD CS SB CNT DT E D511 C505 R544 C528 C531 C527 R566 R559 R630 R567 J501 ...

Page 35: ...T R P N L J H F D B S Q O M K I G E C A 1 3 5 7 2 4 6 SCHEMATIC DIAGRAM TK 760HG Note Components marked with a dot are parts of patterun 1 44 ...

Page 36: ...A C E G I K M O Q S B D F H J L N P R T 1 3 5 7 2 4 6 TK 762HG SCHEMATIC DIAGRAM 45 Note Components marked with a dot are parts of patterun 1 ...

Page 37: ...TK 760HG 762HG TK 760HG 762HG TK 760HG 762HG BLOCK DIAGRAM 51 ...

Page 38: ...put value required to obtain 12dB SINAD To make measurements in the AF section connect the AC level meter ANT input 53dBm 1kHz FM 3kHz DEV Wide 1 5kHz DEV Narrow The AF output level is adjusted for 0 45V 4Ω by the front panel AF VOL control To make measurements in the RF section connect the RF wattmeter 50Ω To make measurements in the AF section connect the AC level meter AG is set so that MIC inp...

Page 39: ...tional unit control singal 24 AUX2 Optional unit control signal 25 EMG TXS Foot switch input signal 26 8C DC 8V 27 MM MIC mute 28 MI External MIC input signal 29 OE Output enable 30 ALT Alert tone signal 31 DEO Receiver detector output 32 MII Transmit audio signal input 33 MIO Transmit audio signal output 34 GND Grond CN3 TX RX Unit Pin No Name Function 1 HOR Horn alert call output 2 E Ground 3 SB...

Page 40: ...Temperature Range 30 C to 60 C 22 F to 140 F Dimensions Weight 140 5 33 64 W x 40 1 37 64 H x 173 6 13 16 D mm inch 1050g 2 31 lbs Channel Frequency Spread K K2 26MHz M 28MHz RECEIVER Measurements made per EIA standard EIA TIA 204 D Sensitivity 12dB SINAD Wide 0 25µV Narrow 0 33µV Selectivity Wide 85dB Narrow 75dB Intermodulation Wide 75dB Narrow 65dB Spurious Responce 90dB Audio Power Output 4 0W...

Page 41: ...018 Paris France KENWOOD ELECTRONICS U K LIMITED KENWOOD House Dwight Road Watford Herts WD1 8EB United Kingdom KENWOOD ELECTRONICS EUROPE B V Amsterdamseweg 37 1422 AC Uithoorn The Netherlands KENWOOD ELECTRONICS ITALIA S p A Via G Sirtori 7 9 20129 Milano Italy KENWOOD IBERICA S A Bolivia 239 08020 Barcelona Spain KENWOOD ELECTRONICS AUSTRALIA PTY LTD A C N 001 499 074 16 Giffnock Avenue North R...

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