JVC KS-FX834R Service Manual Download Page 1

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SERVICE MANUAL

CASSETTE RECEIVER

No.49571

Sep. 2000

KS-FX834R

Area Suffix

E ---- Continental Europe

Contents

Safety precaution
Disassembly method
Adjustment method
Description of major ICs

This service manual is printed on 100% recycled paper.

1-2
1-3
1-10
1-14

www. xiaoyu163. com

QQ 376315150

TEL 13942296513

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

Summary of Contents for KS-FX834R

Page 1: ...caution Disassembly method Adjustment method Description of major ICs This service manual is printed on 100 recycled paper 1 2 1 3 1 10 1 14 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 2: ...ention to such burrs in the case of preforming repair of this system Safety precaution www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 3: ...itch and remove the front panel unit in the direction of the arrow Removing the front chassis See Fig 2 3 Removing the heat sink See Fig 4 1 Remove the three screws B attaching the heat sink on the left side of the body and remove the heat sink b a a b c A B B B Heat sink Fig 2 Fig 1 Fig 3 Fig 4 Front chassis www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5...

Page 4: ...k on the back of the body Removing the main amplifier board assembly See Fig 7 1 2 3 4 5 Remove the front chassis Remove the bottom cover Remove the rear panel Remove the two screws D attaching the main amplifier board assembly on the top cover Disconnect connector CP701 on the main amplifier board assembly from the cassette mechanism assembly d e f Bottom cover Fig 5 Fig 6 Fig 7 B C B B D D CP701...

Page 5: ...hanism assembly from the top cover Removing the control switch board See Fig 9 and 10 1 2 3 Remove the front panel unit from the main body Remove the five screws G attaching the rear cover on the back of the front panel unit Remove the control switch board from the front panel unit www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 139422965...

Page 6: ...connect the 6pin harness from connector CN402 and the card wire from CN403 on the mecha control P W B Refer to Fig 1 and 2 Remove the four screws B on the bottom of the cassette mechanism 1 2 Removing the cassette mechanism assembly See Fig 1 to 3 Fig 1 Cassette mechanism ass y Head relay P W B 6pin harness CN402 CN403 CN402 Mecha control P W B Fig 2 Tab a Mecha control P W B Fig 3 Cassette mechan...

Page 7: ... 6 Prior to performing the following procedure remove the head relay P W B the load arm and the sub chassis Remove the screw E attaching the reinforce bracket Remove the reinforce bracket Push the tab g fixing the cassette holder in the direction of the arrow and open the cassette holder and the holder arm upward until they stop at an angle of 45 degrees Move the two joints h to the side and remov...

Page 8: ...sub motor Release the sub motor from the three tabs m Push the sub motor upward and pull out it Remove the belt on the bottom of the cassette mechanism assembly and remove the two screws G attaching the motor 1 2 3 Removing the motor and the sub motor See Fig 10 and 11 The motors can be detached before removing the load arm ATTENTION Fig 8 Cassette holder and holder arm Joint h Shaft Shaft Joint h...

Page 9: ...e reel driver which engages with the shaft using a pincette or something like that Then remove the reel driver from the shaft Remove the reel driver spring and the reel table 1 2 Removing the reel disc ass y See Fig 12 to 14 When reassembling make sure to use a new slit washer ATTENTION Fig 10 Cassette mechanism ass y Tab k Reel disc P W B Soldering j Tab k G G Motor Belt Flywheel Fig 12 Plate The...

Page 10: ...peakers connection Line out 20k Standard volume position Balance and Bass Treble volume Fader Center Indication 0 Loudness Dolby NR Sound Cruise Off following conditions Playback the test tape VT721 AM mode 999kHz 62dB INT 400Hz 30 modulation signal on receiving FM mono mode 97 5MHz 66dB INT 400Hz 22 5kHz deviation pilot off mono FM stereo mode 1kHz 67 5kHz dev pilot7 5kHz dev Output level 0dB 1 V...

Page 11: ...ead Azimuth screw B Reverse Azimuth screw B Reverse Azimuth screw A Forward Azimuth screw A Forward Playback Head www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 12: ...r mechanism driving section such as motor etc Disassembly method 1 Remove the bottom cover 2 Remove the front panel assembly 3 Remove the top cover 4 Install the front panel 5 Confirm that current is being carried by connecting an extension cord jig Note Available to connect to the CP701 connector when in stalling the front panel Cassette mechanism to Main board to Cassette mechanism Front panel a...

Page 13: ...play mode make adjustment of peak of Lch Rch output with Azimuth screw B For Oscilloscope litharge corrugation set 45 as standard c With AC volt meter confirm the difference of output for 4ch between Lch Rch at forward play mode and Lch Rch Reverse play mode being within 3 0dB d After operation make confirmation of Lch Rch azimuth output being within 1 0dB from adjustment value a At Forward playmo...

Page 14: ...layback equalizer amplifier output Playback equalizer amplifier capacitance Playback equalizer amplifier feedback Playback equalizer amplifier input Playback equalizer amplifier ground Playback equalizer amplifier input Center Playback equalizer amplifier reference Playback equalizer amplifier input Playback equalizer amplifier ground Playback equalizer amplifier input Playback equalizer amplifier...

Page 15: ...P output by inputting voltage This output voltage is 5 7V and max output current is 100mA This voltage supply is for microcomputer Whenever back up voltage supply is connected the output keeps on running This output voltage is 9 0v and max output current is 500mA This voltage supply for AUDIO This output voltage is 8 0V and max output current is 1A This voltage supply for CD Output selector of CD ...

Page 16: ...output J BUS Clock in output Non connect Non connect Non connect Non connect Non connect Non connect Port GND Port Vdd Non connect AF check output L AF check Monaural on off selecting output H mono on FM AM switching output L FM H AM Auto seek stop selecting output H Seek L Stop Pulse signal input port for Cruise control FM AM midle frequency counter input PLL Vdd FM AM limited generator frequency...

Page 17: ...tandby position detection input H eject side L operation side Non connect Non connect Non connect Non connect Non connect Touch tone output Mute output L mute on Power ON OFF switching output H power on Telephone mute signal detection input Dimmer signal detection input L dimmer Dimmer control output Dimmer off L output Rotary volume signal 1 input Power save L Rotary volume signal 2 input Power s...

Page 18: ...BUFFER2 INPUTBUFFER3 INPUTBUFFER4 AMP1 AMP2 AMP3 AMP4 MUTE PVCC1 PVCC2 INVCC 12 22 14 18 6 3 4 5 7 8 9 15 16 17 19 20 21 1 23 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 19: ...cuit 1 1k 1k S1 CL Inputs Outputs C L H H A X L H Y Z H L 1 2 3 4 5 6 7 14 13 12 11 10 9 8 HD74HC126FP X IC801 Buffer 1 Pin layout 3 Block diagram 2 Function www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 20: ...CC1 VCC2 P2 OUT2 Input Output Mode IN1 IN2 OUT1 OUT2 Brake 0 0 0 0 1 0 1 0 0 1 0 1 1 1 0 0 CLOCKWISE COUNTER CLOCKWISE Brake LB1641 IC402 DC Motor Driver 1 Pin Layout 2 Pin Functions www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xia...

Page 21: ...scillator circuit is formed by connecting an external resistor and capacitor to this pin Display off control input Chip enable input Synchronization clock input Serial data input DIMMER Control signal output Non connect O O I I I O I I I I O Pin No Symbol Description I O 2 Pin Functions LC75873NW IC601 LCD Driver VDD1 VDD2 INH OSC VDD VSS COMMOM DRIVER CLOCK GENERATOR SEGMENT DRIVER SHIFT REGISTER...

Page 22: ...11 12 13 14 15 16 Quality indication output RDS data output Reference voltage output 0 5VDDA Multiplex signal input 5V supply voltage for analog part Ground for analog part 0V Sub carrier input to comparator Sub carrier output of reconstruction filter Oscillator mode test control input Test enable input Ground for digital part 0V 5V supply voltage for digital part Oscillator input Oscillator outpu...

Page 23: ...t channel or input from an external equalizer Bass control capacitor left channel or output to an external equalizer Bass control capacitor left channel Input volume 1 left control part Input loudness left control part Output source selector left channel Not used Not used Input C left source Not used Input B left source Input A left source I O O O I I I O I I I Symbol I O Symbol I O Input A right ...

Page 24: ...ETWORK B U 10 1 1Chome Ohwatari machi Maebashi city Japan No 49571 KS FX834R www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 25: ...BUS TU_L TU_R SK ST SM MONO SD ST SEEK STOP FMOSC AFCK FMEO AMEO FM AM RDSCK RDSDA TAPE L TAPE R STANDBY TAPEIN MODE SUBMO SUBMO REEL MSOUT DOLBY F R FFREW MOTOR ENC1 ENC2 KEY0 KEY1 KEY2 LCDCE LCDDA LCDCK REMOCON MUX SCL SDA FL FR RL RR FLOUT FLOUT FROUT FROUT RLOUT RLOUT RROUT RROUT LINE OUTPUT FRONTL FRONTR REARL REAR CH_L CH_R SCK SI SO J801 JBUSSI JBUSSO JBUSIO JBUSSCK 2 1 www x i a o y u 1 6 ...

Page 26: ...aoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 27: ...AL REAR SIGNAL FSDH3113 005AV KS FX850RE KS FX835RE KS FX820RE KS FX834RE Note 3113ma w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 28: ...ction TAPE SIGNAL w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 29: ...3113sw LCD Key control circuit section w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 30: ...A IN Main Main Sub Sub CrO2 S T B Y 3 MODE M J CA IN Main Sub MODE Pho Tr CrO2 Main Sub St BY D Gnd Anode w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 31: ...sm assembly and parts list Electrical parts list Packing materials and accessories parts list KS FX834R 3 3 3 5 3 10 3 14 Area suffix E Continental Europe www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 32: ...w xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 33: ... 69 62 64 72 65 3 9 7 7 55 B LCD1 15 2 90 93 1 8 8 A 104 106 108 107 105 84 83 86 43 42 41 Exploded view of general assembly and parts list Block No M M M 1 w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http...

Page 34: ...GU1745N MINI SCREW 2 FOR LIGHT LENS 57 VKS3793 001 LOCK LEVER TOP 1 58 FSKS3015 001 LOCK LEVER O L 1 59 VKS3798 002 RELEASE LEVER 1 60 FSXP2043 001 UP DOWN BUTTON 1 61 VKS3794 003 LOCK LEVER L 1 62 VKS3795 002 LOCK LEVER R 1 64 VKS5563 001 GEAR 1 General assembly Item Parts number Parts name Area A Parts list Q ty Description Block No M1MM 65 VKZ4786 002 OIL DAMPER 1 67 FSKW4012 002 T SPRING 1 FOR...

Page 35: ...09 LEN 315Y2 107 48 30 3 FG 84M FG 84M 12 108 46 FG 84M FG 84M FG 84M FG 84M 44 34 55 SW 522B 21 38 114 22 33 111 85 82 84 86 71 113 43 110 113 32 111 51 61 37 74 35 60 36 72 9 13 FG 84M FG 84M CFD 409 106 87 45 1 106 Cassette mechanism assembly and parts list Block No M M M 2 CDS 801 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 139422...

Page 36: ...EDUCTION GEARA 1 34 1 0801 2005S REDUCTION GEARB 1 35 1 0801 2006S SPG HOLDER F 1 36 1 0801 2007S FRICTION GEARPL 1 37 1 0801 2008S FRICTION GEARFF 1 38 1 0801 2009S MODE GEAR 1 39 1 0801 2010S REEL SPINDLE 2 40 1 0801 2011S REEL DRIVER 2 41 1 0801 2014S GEAR BASE ARM 1 42 1 0801 2015S GEAR BASE LINK 1 43 1 0801 2016S TAKE UP GEAR 1 44 1 0801 2017S REFLECTOR GEAR 1 45 1 0801 2018S MODE RACK 1 46 1...

Page 37: ... 1 BROWN 97 10801 7015 0S HEAD WIRE BLACK 1 98 10801 7015 1S HEAD WIRE BROWN 1 99 10801 7015 2S HEAD WIRE RED 1 100 10801 7015 3S HEAD WIRE ORANG 1 101 10801 7015 4S HEAD WIRE YELLO 1 102 10801 7015 5S HEAD WIRE WHITE 1 103 1 0801 7016S HEAD PCB 1 104 1 0801 7025S CONN S6B PH K S 1 105 21382 3060 C2S PLAIN B TYPE 1 M2 3 6 0 106 2 1032 0025 C2S SCREW PLAIN 2 M2 2 5 107 21332 0035 P1S S TYPE PRECISI...

Page 38: ... 902 SW 902 FG 84M FG 84M SW 902 FG 84M FG 84M SW 902 SW 902 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 39: ... 2 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 40: ...Z E CAPACITOR 10MF 20 16V C 303 NCS21HJ 471X C CAPACITOR C 304 NCS21HJ 471X C CAPACITOR C 305 NCB21EK 104X C CAPACITOR C 306 NCB21EK 104X C CAPACITOR C 307 QERF1HM 475Z E CAPACITOR 4 7MF 20 50V C 308 QERF1HM 225Z E CAPACITOR 2 2MF 20 50V C 309 QERF1HM 225Z E CAPACITOR 2 2MF 20 50V C 313 NCS21HJ 471X C CAPACITOR C 314 NCS21HJ 471X C CAPACITOR C 315 NCB21EK 104X C CAPACITOR C 318 QERF1HM 225Z E CAPA...

Page 41: ...J 152X MG RESISTOR R 42 NRSA02J 102X MG RESISTOR R 43 NRSA02J 103X MG RESISTOR R 44 NRS181J 102X MG RESISTOR R 53 NRSA02J 473X MG RESISTOR R 54 NRSA02J 473X MG RESISTOR R 55 NRSA02J 103X MG RESISTOR R 56 NRSA02J 222X MG RESISTOR R 57 NRSA02J 103X MG RESISTOR R 58 NRSA02J 153X MG RESISTOR R 59 NRSA02J 471X MG RESISTOR R 60 NRSA02J 473X MG RESISTOR R 71 NRS181J 222X MG RESISTOR R 72 NRSA02J 222X MG ...

Page 42: ... R 909 NRSA02J 473X MG RESISTOR R 976 NRSA02J 104X MG RESISTOR R 977 NRSA02J 273X MG RESISTOR R 978 NRS181J 123X MG RESISTOR S 701 QSW0451 001 DETECT SWITCH S 702 QSW0451 001 DETECT SWITCH TU 1 QAU0156 002 TUNER X 71 QAX0263 001Z CRYSTAL X 701 QAX0406 002Z CRYSTAL Main board Item Parts number Parts name Area Electrical parts list Remarks Block No 02 A C 401 NDC21HJ 101X C CAPACITOR C 402 NDC21HJ 1...

Page 43: ...A02J 561X MG RESISTOR R 613 NRSA02J 821X MG RESISTOR R 614 NRSA02J 122X MG RESISTOR R 615 NRSA02J 182X MG RESISTOR R 616 NRSA02J 272X MG RESISTOR R 620 NRS181J 561X MG RESISTOR R 621 NRS181J 271X MG RESISTOR R 622 NRS181J 271X MG RESISTOR R 623 NRS181J 271X MG RESISTOR R 624 NRS181J 271X MG RESISTOR R 625 NRS181J 431X MG RESISTOR R 626 NRS181J 271X MG RESISTOR R 627 NRS181J 271X MG RESISTOR R 628 ...

Page 44: ...n A21 Battery Packing materials and accessories parts list Block No M M M 3 Block No M M M 4 A1 A14 P4 P3 P5 A20 A21 P4 P2 P2 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 45: ...RANTY CARD 1 A 5 VKZ4027 202 PLUG NUT 1 A 6 VKH4871 001SS MOUNT BOLT 1 A 7 VKZ4328 001 LOCK NUT 1 A 8 WNS5000Z WASHER 1 A 9 FSKL4010 002 HOOK 2 A 10 LV40978 001A CAUTION SHEET 1 A 11 VND3050 002 IDENTITY CARD 1 A 12 FSJB3001 30C HARD CASE 1 A 13 FSKM2004 202 MOUNTING SLEEVE 1 A 14 QAM0175 001 POWER CORD 1 JEIN NUMBER A 16 FSJD2034 001 TRIM PLATE 1 A 18 VND3046 001 SERIAL TICKET 1 A 20 RM RK31 REMO...

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