JVC KS-FX8R Service Manual Download Page 27 | Manualshive

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KS-FX8R

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Standard schematic diagrams

Main amp section

Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.

TUNER SIGNAL
TAPE SIGNAL
CD-CH SIGNAL
FRONT SIGNAL
REAR SIGNAL

Main amp section

g

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Summary of Contents for KS-FX8R

Page 1: ...Y OF JAPAN LTD KS FX8R KS FX8R Area Suffix E Continental Europe 40Wx4 TP DISP RPT SSM SCM MO RND 7 8 9 10 11 12 PTY CD CH FM AM TAPE I ATT DOLBY B NR DAB RDS KS FX8R KS FX8R Contents Safety precaution Disassembly method Adjustment method Description of major ICs 1 2 1 3 1 10 1 14 ...

Page 2: ...KS FX8R 1 2 Burrs formed during molding may be left over on some parts of the chassis Therefore pay attention to such burrs in the case of preforming repair of this system Safety precaution ...

Page 3: ...on the left side of the front chassis two joints b on the right side and one joint c from upside then detach the front chassis toward the front side 1 2 Removing the front chassis See Fig 2 3 Remove the three screws B attaching the heat sink on the left side of the body and remove the heat sink 1 Removing the heat sink See Fig 4 Joint c Heat sink Fig 2 Fig 1 Fig 3 Fig 4 Front panel unit Front chas...

Page 4: ...tom cover Remove the five screws C attaching the rear panel and one screw D attaching the pine jack on the back of the body 1 Removing the rear panel See Fig 6 Prior to performing the following procedure remove the front chassis the heat sink bottom cover and the rear panel Remove the two screws E attaching the main amplifier board assembly on the top cover Disconnect connector CP401 on the main a...

Page 5: ... the top cover 1 Removing the cassette mechanism assembly See Fig 8 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 1 2 3 Removing the LCD key control switch board See Fig 9 and 10 Cassette mechanism assembly F F F Top cover Fig 8 G G G G Fig 9 Fig 10 LCD K...

Page 6: ...ection of the arrow 1 2 3 4 Removal of the cassette mechanism Removing the head amplifier board See Fig 1 and 2 Disconnect the 6pin wire from connector CN402 and the card wire from CN403 on the head amplifier board 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 rel...

Page 7: ... the one side of the sub chassis Then release the sub chassis from the tab f Removing the sub chassis See Fig 6 Prior to performing the following procedure remove the head relay board 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 an...

Page 8: ...lay board the load arm the sub chassis the cassette holder and the holder arm Disengage the part n inside of the 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 Removing the reel disc ass y I See Fig 12 to 14 When reassembling make sure to use a new slit washer ATTENTION Fig...

Page 9: ...ve the reel disc ass y II as with the reel disc ass y I 1 2 3 Removing the reel disc ass y II See Fig 12 to 15 Do not break the front panel tab fitted to the metal cover ATTENTION Prior to performing the following procedure remove the reel disc I ATTENTION Fig 15 Push aside the gear and reattach the reel disc Ass y I Reel disc ass y II ...

Page 10: ...nism adjustment Measuring conditions Amplifier section Power supply voltage DC14 4V 10 5 16V Load impedance 4 2Speakers connection Line out 20k Standard volume position Balance and Bass Treble volume Fader Center Indication 0 Loudness Dolby NR Sound Cruise Off Volume position is about 2V at speaker output with following conditions Playback the test tape VT721 AM mode 999kHz 62dB INT 400Hz 30 modul...

Page 11: ...th screw Fixed screw Height adjusting screw c Height adjusting screw b Height adjusting screw a Arrangement of adjusting test points Head section view Cassette mechanism Surface Tape speed adjust Motor assembly Playback head Azimuth screw ...

Page 12: ...s type of extension cord is needed to check operation of the mechanism assembly after disassembly 3 Extension cord EXTKSRT002 6P 6 pin extension cord For connection between mechanism assembly and main board assembly Check for 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 ...

Page 13: ... b In this case the phase difference should be within 45 3 Engage the reverse mode and adjust the output level to maximum with azimuth adjustment screw c The phase difference should be 45_Kor more 4 When switching between forward and reverse modes the difference between channels should be within 3dB Between FWD Lch and Rch REV Lch and Rch 5 When the test tape VT721 315Hz is played back the level d...

Page 14: ... driver I O selector output for J BUS H OUT L INPUT Non connect J BUS Data input J BUS Data 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 ...

Page 15: ...tion data output I2C information clock input Non connect Non connect Non connect Non connect Non connect Non connect Non connect Non connect Non connect Non connect Non connect Non connect Mute output Power ON OFF switching output H power on Non connect Non connect Non connect Non connect Non connect CPU power supply STOP signal output terminal Clock input for RDS RDS data input Remocom input Deta...

Page 16: ...16 BA4905 V3 IC901 Regulator 1 Pin layout 2 Block diagram 1 2 3 4 5 6 7 8 9 10 11 12 EXT EXT ACC AUDIO 9V CTRL ILM 10V GND RESET RESET COMP VDD 5 7V CD 8V VCC AJ 1 2 3 4 5 6 7 8 9 10 11 12 37K 5K REGULATOR OIVPC ...

Page 17: ...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 AUDIO ILM and EXT To be connected with the BACK UP of car This output voltage is 10V and max output current is 500mA Output voltage is adjustable Putting a resistance between ILM and AJ or between AJ and GND makes ILM output voltage...

Page 18: ...BREF PBFIN1 PBGND PBRIN1 PBFB1 I O O I I I O O I I I Resistance for setting the reference Ground TAPE input Output reference Playback 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...

Page 19: ... 1 Pin layout 2 Block diagram IN1 IN2 IN3 IN4 STBY 2 1 11 13 23 10 TAB PROTECTOR ASO SURGE TSD INPUTBUFFER1 INPUTBUFFER2 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 ...

Page 20: ... 1Y 2Y 2Y 3Y 4Y Output Output Output Output Sample as Load Circuit 1 Sample as Load Circuit 1 Sample as Load Circuit 1 1k 1k S1 CL Input Outout 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 Pin function ...

Page 21: ...Must be connected to VDD1 when a 1 2 bias drive scheme in used Power supply connection Oscillator connection An oscillator 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...

Page 22: ...ref MUX VDDA GND CIN SCOUT RDCL T75 OSCO OSC1 VDD GND TEST MODE 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 QUAL RDDA Vref MUX VDDA GND CIN SCOUT MODE TEST GND VDD OSC1 OSC0 T75 RDCL O O I I O I O O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Non connect RDS data output Reference voltage output Multiplex signal input 5V Supply voltage for analog Ground for analog part 0V Sub carrier output of reconstruction...

Page 23: ...E ICL IMO IBL IAL Serial data input output Ground output left rear output left front Treble control capacitor left 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 s...

Page 24: ...KS FX8R Printed in Japan 200101 O VICTOR COMPANY OF JAPAN LIMITED MOBILE ELECTRONICS DIVISION PERSONAL MOBILE NETWORK BUSINESS UNIT 10 1 1Chome Ohwatari machi Maebashi city Japan No 49850 ...

Page 25: ...ECTOR IC701 CPU IC751 JVC 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 F R TAPEIN MOTOR T MUTE ENC1 ENC2 KEY0 KEY1 KEY2 LCDCE LCDDA LCDCK REMOCON MUX SCL SDA FL FR RL RR FLOUT FROUT RLOUT RROUT LINE OUTPUT REARL REARR CH_L CH_R SCK SI SO J751 JBUSSI JBUSSO JBUSIO JBUSSCK CJ902 CP902 MOTOR MUTE SW PB HEAD IC901 HEAD AMP CN901 L CH R CH CJ901 ...

Page 26: ...2 2 KS FX8R M E M O ...

Page 27: ... 2 3 4 5 6 Standard schematic diagrams Main amp section Parts are safety assurance parts When replacing those parts make sure to use the specified one TUNER SIGNAL TAPE SIGNAL CD CH SIGNAL FRONT SIGNAL REAR SIGNAL Main amp section g ...

Page 28: ...2 4 I H A B C D E F G 1 2 3 4 5 6 KS FX8R KS FX8R LCD Key control section ...

Page 29: ...2 5 KS FX8R I H A B C D E F G 1 2 3 4 5 6 TAPE SIGNAL Mecha control Head amp section ...

Page 30: ... B945 B901 B903 B905 B810 B932 B911 B801 B954 B906 B907 B908 B910 B803 B916 B805 B920 R746 R747 B913 B914 D701 D702 D703 D704 D709 D705 D706 D707 D708 D710 B808 B935 B809 B940 B943 B912 B917 B807 D242 B944 B939 B938 B934 B930 B814 B931 D241 Q53 B921 B923 B924 R714 B922 B925 B806 R60 D3 B904 B811 B942 B929 B926 B941 Q10 D4 R307 Q701 R748 B813 B928 R308 C713 B952 R309 B816 C910 C318 C309 C308 C319 B...

Page 31: ...lies are not available as service parts Contents Exploded view of general assembly and parts list Cassette mechanism assembly and parts list Electrical parts list Packing materials and accessories parts list KS FX8R 3 2 3 5 3 10 3 14 Area suffix E Continental Europe ...

Page 32: ... board Mecha control board Front board 7 4 11 11 11 11 5 6 6 6 6 2 1 3 38 37 42 51 52 75 45 46 39 40 41 53 54 58 43 44 48 49 47 50 57 57 57 55 56 61 LCD1 60 64 59 63 62 65 10 9 66 29 22 19 15 16 32 24 36 35 17 18 21 33 28 23 34 20 14 14 26 31 27 30 25 67 12 8 12 68 74 69 70 13 13 71 72 72 73 ...

Page 33: ...KS3798 002 RELEASE LEVER 1 23 VKS3793 001 LOCK LEVER TOP 1 24 VKS3794 003 LOCK LEVER L 1 25 VKS3795 002 LOCK LEVER R 1 26 VKS5563 001 GEAR 1 27 VKZ4786 002 OIL DAMPER 1 28 FSKW4012 002 T SPRING 1 FOR L LEVER TOP 29 VKW5264 005 T SPRING 1 FOR RELEASE LEVER 30 VKW5262 001 T SPRING 1 FOR L LEVER R 31 QYSDSF2006M SCREW 1 DAMPER L LEVER R 32 VKW5263 002 T SPRING 1 FOR L LEVER L 33 VKZ4777 001 MINI SCRE...

Page 34: ...INI SCREW 5 FRONT REAR 58 GE40112 001A LIGHT COVER 1 59 QNZ0449 001 RUBBER CONNECTOR 1 60 QNZ0450 001 RUBBER CONNECTOR 1 61 FSYH3024 001 LCD CASE 1 62 FSJK3028 001 LCD LENS 1 63 FSYH4061 001 LIGHTING SHEET 1 64 FSYH4061 002 LIGHTING SHEET 1 65 FSKS3013 001 LENS CASE 1 66 GE30135 002A NAME PLATE 1 FOR MP USE 67 VMA4652 001SS EARTH PLATE 1 68 FSKL4018 00B IC BRACKET 1 69 FSKL4023 001 REG BRACKET 1 7...

Page 35: ... 409 49 40 66 75 17 94 93 95 96 16 5 50 28 CFD 409 4 63 64 LEN 315Y2 LEN 315Y2 27 67 25 SW 522B SW 522B 117 CFD 409 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 ...

Page 36: ...CT CAM PLATE 1 28 1 0801 1012S CASSETTE HOLDER 1 30 1 0801 1020S REINFORCE BRKT 1 32 1 0101 2056S IDLE PULLEY A1 1 33 1 0801 2004S REDUCTION 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...

Page 37: ...009 0S M MOTOR WIRE 1 BLACK 94 10801 7009 1S M MOTOR WIRE 1 RED 95 10801 7010 0S S MOTOR WIRE 1 ORANGE 96 10801 7010 1S S MOTOR WIRE 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 CON...

Page 38: ...3 8 KS FX8R SW 902 SW 522B FG 84M CFD 409 LEN 315Y2 Grease point 1 2 FG 84M FG 84M SW 902 SW 902 FG 84M FG 84M SW 902 FG 84M FG 84M SW 902 SW 902 ...

Page 39: ...3 9 KS FX8R Grease point 2 2 ...

Page 40: ...X C CAPACITOR C 244 QERF1HM 224Z E CAPACITOR 0 22MF 20 50V C 301 QERF1CM 106Z E CAPACITOR 10MF 20 16V C 302 QERF1CM 106Z 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...

Page 41: ...4 NRSA02J 102X MG RESISTOR R 41 NRSA02J 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 ...

Page 42: ...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 Item Parts number Parts name Area Electrical parts list Mecha control board Remarks Block No 02 A C 401 NDC21HJ 101X C CAPACITOR C 402 NDC21HJ 101X C CAPACITOR C 403 NDC21HJ...

Page 43: ...2X MG RESISTOR R 609 NRSA02J 182X MG RESISTOR R 610 NRSA02J 272X MG RESISTOR R 611 NRSA02J 392X MG RESISTOR R 612 NRSA02J 821X 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...

Page 44: ...3 14 KS FX8R Packing materials and accessories parts list Block No M M M 3 Block No M M M 4 A1 P2 P4 A15 KIT A10 A14 P7 P6 A16 A2 A6 P2 P5 P3 A9 P1 A7 A8 P5 ...

Page 45: ...CTIONS 1 A 2 GET0006 002A INSTRUCTIONS 1 A 3 GET0006 005A INSTALL MANUAL 1 GET0006 003A INSTALL MANUAL 1 GET0006 004A INSTALL MANUAL 1 A 4 BT 54013 1 WARRANTY CARD 1 A 5 VND3046 001 SERIAL TICKET 1 A 6 VND3050 002 IDENTITY CARD 1 A 7 LV40978 001A CAUTION SHEET 1 A 8 FSJD2034 001 TRIM PLATE 1 A 9 FSKM2004 202 MOUNTING SLEEVE 1 A 10 VKZ4027 202 PLUG NUT 1 A 11 VKH4871 001SS MOUNT BOLT 1 A 12 VKZ4328...

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