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Kenwood TK-868G, Service Manual

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Kenwood TK-868G Service Manual Download Page 28

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TK-868G

27

Summary of Contents for TK-868G

Page 1: ...been taken in the preparation of this manual Kenwood assumes no responsibility for errors or omissions Neither is any liability assumed for damages resulting from the use of the information contained herein Kenwood reserves the right to make changes to any products herein at any time for improvement purposes 文档版权信息 Kenwood Corporation 拥有版权 2006 保留所有权利 未经 Kenwood 公司预先书面同意 无论出于何种目的 均不得以任何形式或任何方式包 括电...

Page 2: ... VIEWS DISPLAY UNIT X54 3270 10 37 PLL VCO X58 4670 16 38 TX RX UNIT X57 5963 09 A 2 39 TX RX UNIT X57 5963 09 B 2 45 SCHEMATIC DIAGRAM 49 BLOCK DIAGRAM 53 SPECIFICATIONS 56 CONTENTS SUPPLEMENT This TK 868G service manual contains a number of sec tions which differ from the service manual B51 8500 00 for the TK 868G For items other than those in this TK 868G service manual please refer to the serv...

Page 3: ...al List Title Parts number Remarks Destination TX RX unit PCB number TK 868G B51 8500 00 C C3 J72 0678 02 TK 868G B51 8502 00 M M3 J72 0678 02 TK 868HG B51 8541 00 SUPPLEMENT C J72 0760 02 TK 868HG B51 8541 10 REVISED C C3 J72 0760 12 TK 868G B51 8566 00 SUPPLEMENT C6 J72 0760 22 This Service manual Frequency range C M 450 490MHz C3 M3 400 430MHz C6 350 390MHz MON Channel set mode Function set mod...

Page 4: ... the KCT 19 then insert the square plug into the KCT 19 connector 2 3 1 1 3 6 13 15 KCT 18 KCT 19 Contact 1 2 3 2 3 1 Fig 1 Modifying the Transceiver Modify the transceiver as follows to turn the power or the Horn Alert or Manual Relay function on and off with the igni tion key 1 Remove the lower half of the transceiver case 2 Set jumper resistors 0Ω R134 and R135 of the TX RX unit A 2 as shown in...

Page 5: ...iver 2 Insert the two cables with connectors from the KAP 1 switch unit into the connectors on the transceiver 3 Secure the switch unit board to the chassis with a screw The notch in the board must be placed at the front left side 4 Attach the cushion on the top of the KAP 1 switch unit 1 3 2 Modifying the Transceiver Horn alert The signal from pin 4 of IC9 on the TX RX unit turns Q5 and Q1 on and...

Page 6: ...A and HR2 are not necessary and the speaker out put is output to an external unit through the KCT 19 connect the KCT 19 C connector to CN8 on the TX RX unit 8C R21 Q5 Q1 D2 Q6 Q1 Q6 4 IC9 Shift register IGN KAP 1 SWITCH UNIT X41 3380 20 W1 1 2 3 HOR E SB W2 1 2 3 PA LI SPO SPI CN1 1 2 HR2 NC CN2 1 2 3 HR1 E SB CN3 1 2 PAO LIO E R1 0 C5 1000P C6 1000P C7 1000P K2 D1 C3 0 01 C1 1000P R3 0 R4 0 C2 10...

Page 7: ...ce 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 47K Remove IC14 KCT 19 15 pin KCT 18 Foot switch Control section TX RX section Outside 13 1 ...

Page 8: ...1 push Horn Light operation stop Horn Light operation D A key 1 push Emergency reset code receive MON key Foot SW 1 push Emergency mode reset Normal operation After 1 min 1 4 2 Dots Dots LCD dots light 3 or or 1 Press and hold the foot switch for about one second 2 3 left most dots light 3 2 right most dots light 4 While pressing MON key push foot switch for about one second 1 4 2 3 ...

Page 9: ... E B 2 B 0 0 0 J 1 2 3 4 5 6 7 Chip B F Carbon resistor Normal type EX R D 1 4 B B 2 C 0 0 0 J 1 2 3 4 5 6 7 1 Type ceramic electrolytic etc 5 Voltage rating 2 Shape round square ect 6 Value 3 Dimension 7 Tolerance 4 Temp coefficient Capacitor value 010 1pF 100 10pF 101 100pF 102 1000pF 0 001µF 103 0 01µF Less than 10pF Code B C D F G pF 0 1 0 25 0 5 1 2 1st word 2nd word Refer to the table above ...

Page 10: ...B T07 0368 05 SPEAKER D802 805 B30 2220 05 LED YELLOW C801 803 CC73GCH1H101J CHIP C 100PF J C804 CK73GF1A105Z CHIP C 1 0UF Z C805 CK73GB1H102K CHIP C 1000PF K C806 807 CK73GB1H471K CHIP C 470PF K CN801 E40 6020 05 PIN ASSY L801 L92 0138 05 FERRITE CHIP TK 868G R801 803 RK73GB1J103J CHIP R 10K J 1 16W R804 RK73GB1J473J CHIP R 47K J 1 16W R805 RK73GB1J474J CHIP R 470K J 1 16W R806 R92 1252 05 CHIP R...

Page 11: ... C92 0719 05 ELECTRO 47UF 25WV C142 143 CK73GB1H471K CHIP C 470PF K C144 CK73GB1H102K CHIP C 1000PF K C145 CC73GCH1H150J CHIP C 15PF J C146 CK73GB1H471K CHIP C 470PF K C148 149 CK73GB1H471K CHIP C 470PF K C150 CK73FF1C105Z CHIP C 1 0UF Z C152 CC73GCH1H060D CHIP C 6 0PF D C154 CK73GB1H102K CHIP C 1000PF K C155 CC73GCH1H030C CHIP C 3 0PF C C156 CK73GB1H471K CHIP C 470PF K C157 CK73GB1H102K CHIP C 10...

Page 12: ...CK73GB1H102K CHIP C 1000PF K C554 CK73GB1H122K CHIP C 1200PF K C555 C92 0560 05 CHIP TAN 10UF 6 3WV C556 CK73GB1C333K CHIP C 0 033UF K C557 CK73GB1C104K CHIP C 0 10UF K C558 CC73GCH1H101J CHIP C 100PF J C559 CK73GB1H102K CHIP C 1000PF K C560 563 CK73GB1C104K CHIP C 0 10UF K C564 C92 0507 05 CHIP TAN 4 7UF 6 3WV C567 CC73GCH1H101J CHIP C 100PF J C568 C92 0507 05 CHIP TAN 4 7UF 6 3WV C569 CK73GB1C33...

Page 13: ...J104J CHIP R 100K J 1 16W R13 RK73GB1J472J CHIP R 4 7K J 1 16W R14 RK73GB1J474J CHIP R 470K J 1 16W R15 RK73GB1J104J CHIP R 100K J 1 16W R16 RK73GB1J220J CHIP R 22 J 1 16W R17 RK73GB1J154J CHIP R 150K J 1 16W R18 RK73GB1J103J CHIP R 10K J 1 16W R19 RK73GB1J392J CHIP R 3 9K J 1 16W R20 RK73GB1J224J CHIP R 220K J 1 16W R21 RK73GB1J102J CHIP R 1 0K J 1 16W R22 RK73GB1J474J CHIP R 470K J 1 16W R23 RK7...

Page 14: ... R155 RK73GB1J103J CHIP R 10K J 1 16W R156 RK73FB2A5R6J CHIP R 5 6 J 1 10W R158 R92 0670 05 CHIP R 0 OHM R159 RK73GB1J473J CHIP R 47K J 1 16W R161 162 RK73GB1J104J CHIP R 100K J 1 16W R163 R92 0670 05 CHIP R 0 OHM R164 R92 1215 05 CHIP R 470 J 1 2W R166 RK73GB1J151J CHIP R 150 J 1 16W R169 RK73GB1J103J CHIP R 10K J 1 16W R170 RK73FB2A222J CHIP R 2 2K J 1 10W R171 RK73GB1J153J CHIP R 15K J 1 16W R1...

Page 15: ...IP R 0 OHM R586 RK73GB1J473J CHIP R 47K J 1 16W R587 R92 1252 05 CHIP R 0 OHM R588 RK73GB1J103J CHIP R 10K J 1 16W R590 RK73GB1J333J CHIP R 33K J 1 16W R591 R92 1252 05 CHIP R 0 OHM R592 RK73GB1J103J CHIP R 10K J 1 16W R593 RK73GB1J181J CHIP R 180 J 1 16W R594 RK73GB1J392J CHIP R 3 9K J 1 16W R595 RK73GB1J181J CHIP R 180 J 1 16W R598 RK73GB1J473J CHIP R 47K J 1 16W R599 RK73GB1J102J CHIP R 1 0K J ...

Page 16: ...132 Q R TRANSISTOR Q29 DTC114EKA DIGITAL TRANSISTOR Q31 2SC2412K TRANSISTOR Q32 2SB1565 E F TRANSISTOR Q33 DTC114EKA DIGITAL TRANSISTOR Q34 3SK240 FET Q35 DTC144EKA DIGITAL TRANSISTOR Q36 2SC2412K TRANSISTOR Q37 38 2SK1824 FET Q501 2SC4619 TRANSISTOR Q502 503 DTC114EE DIGITAL TRANSISTOR Q504 2SC4617 S TRANSISTOR Q505 2SB1132 Q R TRANSISTOR Q506 DTC114EE DIGITAL TRANSISTOR Q508 2SC4617 S TRANSISTOR...

Page 17: ...114 RK73GB1J470J CHIP R 47 J 1 16W R115 RK73GB1J103J CHIP R 10K J 1 16W R116 RK73GB1J392J CHIP R 3 9K J 1 16W R117 RK73GB1J101J CHIP R 100 J 1 16W D101 104 1SV283 VARIABLE CAPACITANCE DIODE D105 1SV214 VARIABLE CAPACITANCE DIODE Q101 2SK508NV K52 FET Q102 DTC114EUA DIGITAL TRANSISTOR Q103 2SK508NV K52 FET Q104 105 2SC4081 TRANSISTOR Q106 2SC4226 R24 TRANSISTOR ...

Page 18: ...24 3 24 2 40 37 7 11 6 17 18 22 22 23x2 27 24 9 25 14 12 21x2 44 26 IC400 16 701 Cx2 702 703 A A C Ax2 C 703 TX RX unit X57 596 B 2 TX RX unit X57 596 A 2 Display unit X54 327 704 Dx11 Cx2 B B 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 19: ...loded numbers larger than 700 are not supplied D E 1 2 3 8 Instruction manual B62 1259 20 30 Polystyrene foamed fixture F H10 6618 12 31 Polystyrene foamed fixture R H10 6619 12 33 Protection bag H25 0720 04 34 Item carton case H52 1520 02 ...

Page 20: ...gh and low Changes signalling Changes wide and narrow CH Changes channel Volume Volume up down LCD indicator SCN Unused AUX Lights at RF power low MON Lights at monitor on Right side dot Lights at narrow LED indicator Red LED Lights during transmission Green LED Lights when there is a carrier Frequency and Signalling The set has been adjusted for the frequencies shown in the following table When r...

Page 21: ...must be terminated with a 4 dummy load and connected to an AC voltmeter and an audio distortion meter or a SINAD measurement meter at all times during tuning Transceiver tuning To place transceiver in tuning mode Channel appears on LCD Set channel according to tun ing requirements LCD display Test mode Press SCN now in tuning mode Use D A button to write tuning data through tuning modes and CH to ...

Page 22: ...ation L _FQT_ XXX QT 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 ...

Page 23: ...sitivity 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 3V 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 Supply...

Page 24: ...23 TK 868G 1 8 1 BLC 2 PSB 3 E 4 PTT 5 ME 6 MIC 7 HOOK 8 CM ...

Page 25: ...ng mode panel A 2 L22 maximum S E N S _ AF VTVM ACC Adjust 250 Distortion EXT SP SSG freq meter 389 950MHz Oscilloscope SSG output 103dBm 1 58µV AG SSG MOD 3kHz AF output 1V 4Ω DVM TX RX RSSI A 2 2 S ENS Front CH RSSI voltage Adjust panel maximum SSG freq 350 050MHz 3 S E N S Adjust SSG freq 370 050MHz Measurement Test equipment Unit Terminal Adjustment Unit Parts Method Specifications Remarks Con...

Page 26: ...24 TK 868G 25 ...

Page 27: ...MOD 3kHz Wide 1 5kHz Narrow 2 S Q L 3 Adjust SSG freq 370 050MHz 3 S Q L 3 _ Adjust SSG freq 389 950MHz Narrow 4 SQL3 Adjust SSG freq 370 050MHz 4 Squelch 9 1 Set test mode Wide Select SQL9 in tuning mode S QL9 Adjust SSG freq 350 050MHz SSG output 115dBm 0 4µV SSG MOD 3kHz Wide 1 5kHz Narrow 2 S Q L 9 Adjust SSG freq 370 050MHz 3 S Q L 9 _ Adjust SSG freq 389 950MHz Narrow 4 SQL9 Adjust SSG freq ...

Page 28: ...25 TK 868G 27 ...

Page 29: ...inal Adjustment Unit Parts Method Specifications Remarks Condition Item 1 Frequency 1 Set test mode Power meter Rear ANT Front CH Check 370 100MHz 100Hz Select FREQ in tuning mode F counter panel panel PTT ON Adjust _ 2 Power 1 Maximum power Check More than 26 0W output Set test mode Select HPOW in tuning mode H POW Adjust 256 PTT ON 3 High power 1 Set test mode 25 0W 1 0W Select HPOW in tuning mo...

Page 30: ...26 TK 868G 45 29 ...

Page 31: ... the de Wide Narrow balanced MIC input OFF Deviation panel panel modulation Wide Select BAL in tuning mode meter waveform neat _ BAL Oscilloscope Deviation meter filter LPF 3kHz AF VTVM Front MIC HPF OFF AG panel De emphasis OFF PTT ON Adjust 2 _ B A L PTT ON Adjust 3 _ 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...

Page 32: ...27 TK 868G 31 ...

Page 33: ...ust 3 _ F Q T _ PTT ON Adjust Narrow 4 FQT 0 35kHz PTT ON Adjust 10 DQT 1 Set test mode Front CH 0 75kHz 50Hz 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 W...

Page 34: ...28 TK 868G 33 ...

Page 35: ...e EEPROM is stored in memory When parts are changed readjust the transceiver Adjustment Point Repair Jig Chassis Use jig Part No A10 4010 02 for repairing the TK 868G 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 Power LED Volume up down Display Channel up down MIC jack Programmable function key...

Page 36: ...nt via a 0 01µF capacitor AF VTVM AF level obtained when the AF output level is adjusted for 0 45V 4Ω with the front panel AF VOL control Measured with AF voltmeter connected to the external speaker jack receiving a 53dBm SSG signal modulated at 1kHz DEV 3kHz Wide 1 5kHz Narrow 1 AG is set so that MIC input becomes 3kHz Wide 1 5kHz Narrow DEV at 1kHz MOD 2 Transmitting frequency Center frequency R...

Page 37: ...104 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 L112 L116 CN101 RX ST HT E 8CL MD CV 1 6 J72 0676 02 L103 L104 C102 C126 C120 C119 R110 C125 R107 C115 C104 C105 R103 R108 C116 L110 L109 C122 R115 R109 R114 R111 Q...

Page 38: ...C43 R44 IC4 1 4 5 8 R78 C98 C81 R71 C93 C99 CN8 2 1 E 10 SP C141 1 C134 C203 C207 C210 C212 C138 C86 C64 R87 C96 C16 C17 C18 C19 C21 C15 C14 C13 15 1 R9 R59 R19 R91 R37 R34 R86 D9 C40 R53 R52 R51 R8 R7 R66 R49 R40 R57 R1 R2 R202 C45 C70 C165 C79 C80 R67 R89 R77 R90 R96 R221 R70 D42 R85 R76 C83 IC13 C166 D25 C172 C206 C208 C295 C296 L36 R229 R228 C226 L26 C114 C35 C73 C68 Q8 GND MIO MII AFI AFO ALT...

Page 39: ...R46 D27 Q5 R163 D29 R18 R58 F1 R116 Q18 R159 R25 C33 R36 C36 R31 C31 C189 L8 C126 Q15 R125 R145 Q26 R152 R122 R135 C24 R17 1 34 R153 D15 R80 C87 R47 R32 R23 R30 R60 R38 C58 R174 R120 R154 C154 C164 R181 C216 C62 C56 L4 L2 C100 C102 C105 C108 C110 C115 C120 C168 C152 C139 C140 C182 C142 C145 C167 C177 C190 C243 C197 C201 C221 D16 L11 L12 L15 R158 L24 Q14 Q22 1 2 3 4 R100 R101 R108 R111 R112 R113 R1...

Page 40: ...R S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C91 R93 Q32 E C B IC6 1 12 13 1 4 5 8 24 CN3 SB E HOR 3 1 C10 C7 C3 Q9 XF1 DEO DTC IGN DI ME MI PTT SQ 1 3 AM MM EMG TXS C131 C117 G O I C161 C160 C46 IC7 C103 Q12 C89 C30 C1 1 8 C5 C8 C11 C2 C6 C9 R201 J1 EXT SP C144 IC12 O G I C32 CF2 CF1 C97 R10 R11 C72 Q2 R56 C84 IC11 RSSI GND TH1 R177 R62 C61 C270 C71 R3 SB GND R4 R55 R50 R75 CN7 1 3 PA LI SPI SPO R131 R63...

Page 41: ... SFTDT CNT CK E MBL 5C LCD CS SB CNT DT E S R Q P O N M L K J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 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 R723 IC501 1 16 17 32 IC510 1 CNT CK 8 9 16 C501 R...

Page 42: ...613 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 D A MON 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 MBL GND ME HOOK ...

Page 43: ...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 868G Note Components marked with a dot are parts of patterun 1 52 ...

Page 44: ...TK 868G TK 868G TK 868G 53 BLOCK DIAGRAM ...

Page 45: ...mensions Weight 140 5 33 64 W x 40 1 37 64 H x 145 5 45 64 D mm inch 940g 2 07 lbs Channel Frequency Spread C6 40MHz RECEIVER Measurements made per EIA standard EIA TIA 204 D Sensitivity 12dB SINAD Wide 0 28µV Narrow 0 35µV Selectivity Wide 80dB Narrow 65dB Intermodulation Wide 75dB Narrow 63dB Spurious Responce 85dB Audio Power Output 4 0W Frequency Stability 2 5ppm TRANSMITTER Measurements made ...

Page 46: ...57 TK 868G ...

Page 47: ...ris 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 Centrecourt E...

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