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JVC KD-SX950, Service Manual

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JVC KD-SX950 Service Manual Download Page 2

!

CAUTION 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

!

CAUTION Please use enough caution not to see the beam directly or touch it in case of an 

adjustment or operation check.

Summary of Contents for KD-SX950

Page 1: ...Japan KD SX950 No 49539 KD SX950 KD SX950 Area Suffix J Northerm America Contents Safety precaution 1 2 Instructions 1 3 16 Disassembly method 2 1 Adjustment method 2 6 Flow of functional operation until TOC read 2 7 Maintenance of laser pickup 2 9 Description of major ICs 2 10 Block diagram 2 26 Standard schematic diagrams 2 27 Printed circuit boards 2 29 31 Parts list 3 1 CD DISP SCM RPT SSM BBE...

Page 2: ...r on some parts of the chassis Therefore pay attention to such burrs in the case of preforming repair of this system Safety precaution CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check ...

Page 3: ...was removed 1 Remove the front panel unit 2 Remove the two screwsA bsecuring the front chassis assembly See fig 3 3 Remove the four ribsa asecuring the front chassis assembly to the chassis See fig 4 Removing the front chassis assembly Removing the bottom cover assembly Turn the unit upside down then insert and turn to b the screwdriver to remove the bottom cover See fig 5 Fig 5 Fig 1 Eject button...

Page 4: ...w I to remove the IC bracket 2 Remove one screw F to remove the line out jack 3 Remove one screw G to remove the antenna jack 4 Remove one screw H to remove the connector 5 Remove one screw L to remove the connector CD mechanism assembly See fig8 Remove three mechanism mounting screws J retaining the top cover Front panel unit See fig9 Remove five screws K retaining the rear cover Removing the mai...

Page 5: ... Disconnect the flexible wire from connector on the pickup unit Removing the CD mechanism control board See Fig 1 and 2 Turn the FD gear in the direction of the arrow to move the entire pickup unit to the appropriate position where the flexible wire of the CD mechanism unit can be disconnected easily Refer to Fig 2 ATTENTION Fig 1 Fig 2 Fig 3 Fig 4 Front bracket CD mechanism control board Shift th...

Page 6: ... both sides fix arms and move the fix plates in the direction of the arrow to place the four shafts l as shown in Fig 8 and 9 Remove the CD mechanism ass y and the two springs m attaching the flame Remove the two screws J and both sides rear damper brackets from the dampers Detach the CD mechanism ass y from the left side to the right side 1 2 3 4 Removing the CD mechanism ass y See Fig 1 6 to 9 T...

Page 7: ... nut from the pickup unit Pull out the FD screw 2 Removing the pickup unit See Fig 10 and 11 When reattaching the pickuap unit reattach the part o of the pickup unit then the part n of the FD screw ATTENTION Prior to performing the following procedure remove the CD mechanism control board the front bracket loading motor the CD mechanism ass y and the feed motor ass y Turn up the CD mechanism ass y...

Page 8: ...V 10 5 16V Load impedance 20Kohm 2 Speakers connection Output Level Line out 2 0V Vol MAX How to connect the extension cable for adjusting Dummy load Exclusive dummy load should be used for AM and FM For FM dummy load there is a loss of 6dB between SSG output and antenna input The loss of 6dB need not be considered since direct reading of figures are applied in this working standard Standard volum...

Page 9: ... When the laser diode correctly emits Microprocessor commands Rough Servo Mode CLV Servo Mode ProgramArea CLV Servo Mode Lead In Area Digital 0 RF signal Flow of functional operation until TOC read When the pickup correctly moves to the inner area of the disc TERMINAL Microprocessor commands FMO TC9462 53 FEED MOTOR TERMINAL IC581 5 REST SW When the disc correctly rotates Tracking Servo Loop ON Se...

Page 10: ... Check the pickup and its connections NO YES YES YES Does the S search waveform appear at IC581 pins 17 and 18 Is the disk rotated Does the RF signal appear at TP1 Is 4V present at IC581 pins 7 and 8 Check the spindle motor and its wiring Is 4V present at IC521 pin 55 Check the vicinity of IC581 Check IC501 and IC521 YES NO NO NO NO NO YES YES YES Check the circuits in the vicinity of IC501 19 24 ...

Page 11: ... adjustment should be performed to match the characteristics of the whole optical block do not touch the semi fixed resistor If the laser power is lower than the specified value the laser diode is almost worn out and the laser pickup should be replaced If the semi fixed resistor is adjusted while the pickup is functioning normally the laser pickup may be damaged due to excessive current Turn off t...

Page 12: ...2 13 14 CL Vcc INL NFL FIL NFR INR CR CR RGND OUTR OUTL LGND CL Powe supply terminal for amp power supply terminal input terminal Negative feedback terminal Filter terminal Negative feedback terminal Input terminal Power supply terminal for amp Output terminal of internal amp Rch GND terminal Rch output terminal Lch output terminal Lch GND terminal Output terminal of internal amp Pin No Symbol Fun...

Page 13: ...is output voltage is approximately 0 7V lower than VDD S The max output current is 100mA Control of the COMP 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...

Page 14: ...terminal CH1 bus filter setting terminal CH1 bus filter setting terminal CH2 bus filter setting terminal CH2 bus filter setting terminal CH2 treble filter setting terminal CH1 treble setting terminal CH2 treble input terminal CH2 BBE II signal output terminal CH2 output mix amp negative input terminal A2 B2 C2 D2 FIL GND SI SC VCC OUTR2 OUTF2 OUTR1 OUTF1 BOUT1 BNF1 BOUT2 BNF2 TNF2 TNF1 TIN2 BBOUT2...

Page 15: ...BU4066BCF X IC153 Switch 14 13 12 11 10 9 8 1 2 3 4 5 6 7 I O 1 O I 1 O I 2 I O 2 C2 C3 VSS VDD C1 C4 I O 4 O I 4 O I 3 I O 3 14 13 12 11 10 9 8 1 2 3 4 5 6 7 2 Block Diagram 1 Terminal Layout ...

Page 16: ... 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 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 IC771 Buffer 1 Pin layout 3 Block diagram 2 Function ...

Page 17: ...IN Vout OUT 1 3 2 OP1 Co1 IC PST600M G W IC702 System reset ...

Page 18: ... OUT 1 OUT 1 VCC3 4 VCC1 2 LA4743B IC351 Power amp Muting on time control circuit Protective circuit Mute circuit Ripple filter Stand by switch Protective circuit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 TAB GND1 OUTFR STBY OUTFR VCC1 2 OUTRR GND2 OUTRR VREF INRR INFR SGND INFR INRL ONTIME OUTRL GND3 OUTRL VCC3 4 OUTFL MUTE OUTFL GND4 NC 1 Terminal layout 2 Block diagram ...

Page 19: ... 15 FR V02 V02 V01 V01 VCC1 VIN1 VIN1 REV FWD S GND MUTE VIN VIN4 VCC S FR VREF IN REG OUT REG IN VIN3 VIN3 VIN2 VIN2 INPUT MUTE Thermal shutdown Output control Level Shift Level Shift Level Shift Level Shift CH3 4 5 POWER CH5 CH4 CH3 CH2 CH1 MUTE is as follows High Output ON Low Output OFF 22K 11K Signal System Power CH1 2 Power 22K 22K 22K 11K 11K 11K SVREG External PNPTr ...

Page 20: ...ut pin for channel 1 Input pin for channel 1 for gain control Input pin for channel 2 Input pin for channel 2 for gain control Input pin for channel 3 Input pin for channel 3 for gain control Regulator pin External PNP base Regulator pin External PNP collector Reference voltage input pin Signal system power VCC and VCC2 short circuited Input pin for channel 4 for gain control Input pin for channel...

Page 21: ...t 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 Signal output Signal output O O I I I O I I I I O O Pin No Symbol Description I O 2 Pin Functions LC75873NW IC6...

Page 22: ...V OUTPUT V INPUT INPUT NJM2100M WE IC821 Cruise 1 Pin layout 2 Block diagram 1 2 3 4 A OUTPUT A INPUT A INOUT V V B OUTPUT B INPUT B INPUT 8 7 6 5 ...

Page 23: ...8 7 6 5 4 3 2 1 V B OUTPUT B INPUT B INPUT A INPUT A INPUT A OUTPUT V NJM4565M WE IC111 Ope amp ...

Page 24: ...AMP AGC Detector BPF I V conversion PD Vcc Comp 22k ohm magnetic shield Vcc Rout GND for trimming circuit RPM6938 SV4 IC602 Remote control receiver ...

Page 25: ... ohm 20k ohm 13k ohm 680 ohm 2 12k ohm BOTTOM PEAK 20k ohm 20k ohm 20k ohm 12k ohm 1 74k ohm 47k ohm 12k ohm 180k ohm 50uA 21k ohm 21k ohm 7 96k ohm 10k ohm 10k ohm 10k ohm 10k ohm 10pF 36pF 50k ohm 15k ohm 30k ohm 7 67k ohm 10k ohm 30k ohm 15k ohm 20uA 21k ohm 29k ohm 24k ohm 24k ohm 65uA 20pF 180k ohm 20pF 180k ohm 180k ohm 40pF 40pF I I I I SW3 SW2 SW1 1k ohm LCD 3 STATE DET 20pF TEO TEN TEB SE...

Page 26: ...OUT SR I 01 I 02 OUT1 OUT2 VDD2 Crystal oscillator pin Non connect Chip enable input Serial data input Clock input Serial data output Register control pin I O ports I O ports Non connect Non connect Single power supply for REF frequency block O I I I O O I O I O Pin No Symbol I O Function 13 14 15 16 17 18 19 20 21 22 23 24 IFC VDD FMIN AMIN DGND FMCP VT AMCP VCC RF AGND XIN IF signal input Power ...

Page 27: ...al output terminal Sub code block sync signal output terminal Processor status signal readout clock output terminal Processor status signal output terminal Correction frame clock output terminal 7 35kHz Internal signal DSP internal flag and PLL clock output terminal Digital power supply voltage terminal Test input output terminal Normally keep at L level PLL double reference voltage supply termina...

Page 28: ...t terminal for internal signal Digital power supply voltage terminal Digital GND terminal General I O terminal This terminal control IO0 IO3 terminal Normally keep at open DAC test mode terminal Normally keep at open Test input terminal Normally keep at L level Test input output terminal Normally keep at L level Digital GND terminal Crystal oscillator connecting input terminal for DSP Crystal osci...

Page 29: ...r for system sub clock Connecting the crystal oscillator for system sub clock System reset signal input Detection switch of CD mechanism Cut in input for J BUS signal Power save 2 Working together back up by H input to stop mode Pulse signal input port for Cruise control Clock signal input for RDS RDS data input Remote control signal input Power supply terminal Power supply terminal Input for rota...

Page 30: ...signal To action mode of L Non connect Auto seek stop selecting output H Seek L Stop Non connect Selecting output for FM AM L FM H AM CE output for IC control for PLL Data output for IC control for PLL Clock output for IC control for PLL Data input from IC21 Non connect Non connect Connect to GND DIMMER signal input port Power supply terminal Selecting output for power ON OFF H power ON Power supp...

Page 31: ...0K CD L R FM AM TUNER TU1 POWER AMP IC351 LA4743B CN901 CN151 IC152 IC151 IC153 LPF1 LPF2 VOL CL VOL DA VOL CE CD L R BUSO 3 BUCK CCE RST FRONT L FRONT R REAR L REAR R TUL R AUX AMP IC171 NJM4565M CN701 CN711 J1 SWITCHING SUBWOOFER SUBWOOFER SUBWOOFER AUX L AUX R L CH R CH AM FM CN601 ENC1 2 REMOCON SHUTTLE SW EN601 REMOTE CONTROL RECEIVER IC602 RPM6938 SV4 OPERATION SW S601 S620 LCDDA LCDCL LCDCE...

Page 32: ...Power amplifier circuit FRONT L SIGNAL REAR L SIGNAL TUNER SIGNAL CD L SIGNAL CD CHANGER L SIGNAL ...

Page 33: ...Stadard schematic diagrams CD servo control LCD driver circuit CD SIGNAL ...

Page 34: ...Printed circuit boards Main board parts side ...

Page 35: ...Main boartd Solder side ...

Page 36: ...Switch board Parts side Solder side ...

Page 37: ...s are not available as service parts Contents Exploded view of general assembly and parts list CD mechanism assembly and parts list Electrical parts list Packing materials and accessories parts list KD SX950 3 3 3 5 3 8 3 14 Areas suffix J Northern America ...

Page 38: ... M 1 2 17 6 6 22 30 31 29 24 25 23 32 94 95 26 21 90 27 88 18 28 49 43 42 47 46 48 44 45 33 34 34 19 11 52 53 51 89 64 65 72 62 69 35 4 59 71 66 70 61 54 73 56 58 74 68 60 67 57 9 9 7 3 7 82 81 83 84 75 8 76 8 91 76 80 8 76 92 5 1 1 1 2 1 Switch board Main board ...

Page 39: ...FSXP2038 002 OPERAT BUTTON 1 27 FSXP3061 001 SEL BUTTON 1 28 FSJK3027 001 RIM LENS 1 FOR KNOB 29 FSJK4009 001 REMOTE LENS 1 FOR REMOTE CON 30 FSXP3059 001 DETACH BUTTON 1 31 VKW3001 330 COMP SPRING 1 FOR DETACH BUTT 32 VKW3001 330 COMP SPRING 1 FOR EJECT BUTTO 33 FSJC1059 001 REAR COVER 1 34 VKZ4777 001 MINI SCREW 5 FRONT SW PWB 35 FSYN3114 006 NAME PLATE 1 42 QLD0113 001 LCD MODULE 1 43 FSYH3024 ...

Page 40: ...W5264 005 T SPRING 1 FOR RELEASE LEV 72 QYSDSF2006M SCREW 1 DAMPER L LEVER 73 VKZ4777 001 MINI SCREW 1 L LENS F CHASSI 74 VKZ4777 001 MINI SCREW 1 LOCK LEVER O L 75 FSKM3010 019 REAR BRACKET 1 76 QYSDST2606Z SCREW 5 80 QYSDSF3006Z SCREW 1 PIN 81 QMFZ021 150 J1 FUSE A 1 82 FSKL4024 001 P W B BRACKET 1 83 FSKL4015 002 REG BRACKET 1 84 FSKL4014 002 HEAT SINK 1 88 FSYH4036 032 SHEET 1 SPACER FOR SEL 8...

Page 41: ... 43 50 41 42 47 46 103 30 49 49 31 d 112 55 56 47 107 131 36 107 107 d 38 32 54 34 33 130 106 29 108 106 46 135 104 107 40 63 39 a 51 52 109 132 35 37 86 113 113 134 87 80 117 92 84 54 78 c 79 88 93 22 22 89 62 81 82 85 83 114 115 116 102 101 108 100 133 57 CD mechanism assembly and parts list Block No M M M 2 Grease G 31SA G 31SA Bottom side RX 405 ...

Page 42: ... 30310125T S L ARM SPRING 1 20 30310149T REAR DAM BKT Z 1 22 30310151T HUNG UP SP FZ 2 23 30310129T HUNG UP SP R 2 29 30300510T PU GEAR B 1 30 T T BASE Z 1 31 TURN TABLE Z 1 32 30310544T F M BASE Z 1 33 30310547T FD GR BLK Z 1 34 FD GR AZ 1 35 FD GR CZ 1 36 30310546T PU GUIDE Z 1 37 FD SCREW Z 1 38 30310533T THRUST SPR M 1 39 30310548T PU M NUT Z 1 40 30310512T NUT PUSH SPR PL 1 41 30310558T CLP A...

Page 43: ...TUATOR 1 92 30311129T LDG BELT 1 93 30311140T FRONT BRKT J 1 100 9C0620503T C B TAP SCREW 2 M2X5 101 9C2020401T C SCREW TS G 5 M2X4 102 9C4320403T C B TAP SCREW 4 M2X4 103 9C0117223T SCREW 2 M1 7X2 2 104 9C4217703T C TAP SCREW S3 1 M1 7X7 105 9C0320201T C TAP SCREW S3 1 M2X2 106 9C4920013T C TAP SCREW S3 2 M2X10 107 9C4920603T C TAP SCREW B3 4 M2X6 108 9P0220031T TAMS SCREW 2 M2X3 109 9C0314203T C...

Page 44: ...R41AM 107 E CAPACITOR 100MF 20 10V C 323 QERF1HM 104Z E CAPACITOR 10MF 20 50V C 331 QERF1HM 225Z E CAPACITOR 2 2MF 20 50V C 332 QERF1HM 225Z E CAPACITOR 2 2MF 20 50V C 341 QER41AM 107 E CAPACITOR 100MF 20 10V C 342 QERF1EM 475Z E CAPACITOR 4 7MF 20 25V C 343 QER41AM 107 E CAPACITOR 100MF 20 10V C 344 QERF1EM 475Z E CAPACITOR 4 7MF 20 25V C 345 QER41CM 476 E CAPACITOR 47MF 20 16V C 346 QERF1HM 225Z...

Page 45: ...2MF 20 16V C 954 QEKJ1HM 224Z E CAPACITOR 22MF 20 50V C 960 QEZ0337 228 E CAPACITOR 2200MF C 961 QERF1HM 225Z E CAPACITOR 2 2MF 20 50V C 962 QER41CM 476 E CAPACITOR 47MF 20 16V C 963 QER41CM 106 E CAPACITOR 10MF 20 16V C 964 QERF1EM 475Z E CAPACITOR 4 7MF 20 25V C 965 QERF1CM 226Z E CAPACITOR 22MF 20 16V C 966 NCB21HK 103X C CAPACITOR C 967 QER41AM 227 E CAPACITOR 220MF 20 10V C 968 QER41AM 227 E ...

Page 46: ... 161 NRSA02J 0R0X MG RESISTOR R 162 NRSA02J 473X MG RESISTOR R 163 NRSA02J 104X MG RESISTOR R 164 NRSA02J 104X MG RESISTOR R 165 NRSA02J 105X MG RESISTOR R 166 NRSA02J 105X MG RESISTOR R 167 NRSA02J 105X MG RESISTOR R 168 NRSA02J 105X MG RESISTOR R 169 NRSA02J 473X MG RESISTOR R 170 NRSA02J 473X MG RESISTOR R 171 NRSA02J 473X MG RESISTOR R 172 NRSA02J 821X MG RESISTOR R 173 NRSA02J 101X MG RESISTO...

Page 47: ...A02J 472X MG RESISTOR R 728 NRSA02J 472X MG RESISTOR R 729 NRSA02J 0R0X MG RESISTOR R 730 NRSA02J 222X MG RESISTOR R 731 NRSA02J 222X MG RESISTOR R 732 NRSA02J 222X MG RESISTOR R 733 NRSA02J 103X MG RESISTOR R 734 NRSA02J 103X MG RESISTOR R 735 NRSA02J 473X MG RESISTOR R 736 NRSA02J 103X MG RESISTOR R 738 NRSA02J 103X MG RESISTOR R 739 NRSA02J 473X MG RESISTOR R 740 NRSA02J 103X MG RESISTOR R 741 ...

Page 48: ...rks Block No 01 R 971 NRSA02J 472X MG RESISTOR R 972 NRSA02J 473X MG RESISTOR S 701 QSW0451 001 DETECT SW DETACH S 702 QSW0451 001 DETECT SW OPEN TU 1 QAU0154 001 TUNER X 21 QAX0616 001Z CRYSTAL X 521 QAX0413 001Z CRYSTAL X 701 QAX0617 001Z CRYSTAL X 702 QAX0401 001 CRYSTAL ...

Page 49: ... 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 271X MG RESISTOR R 625 NRS181J 431X MG RESISTOR R 626 NRS181J 2...

Page 50: ...1 Hook A7 Plug nut A8 Mount bolt A9 Lock nut A10 Washer SCREW KIT 2 A14 Screw A15 Sheet A16 Sheet A20 Car Cable A19 Trim Plate A12 Remocon A13 Battery Packing materials and accessories parts list Block No M M M 3 Block No M M M 4 KIT2 A14 A15 A16 A24 A12 A13 P2 P2 ...

Page 51: ...KH4871 001SS MOUNT BOLT 1 A 9 VKZ4328 001 LOCK NUT 1 A 10 WNS5000Z WASHER 1 A 11 FSKL4010 002 HOOK 2 A 12 RM RK31 REMOCON 1 A 13 BATTERY 1 A 14 VKZ4777 001 MINI SCREW 2 THEFT PREVENTIO A 15 FSYA4002 001 SHEET 1 THEFT PREVENTIO A 16 FSYH4036 036 SHEET 2 FOR LEFT RIGHT A 17 FSKM2004 002SSF MOUNTING SLEEVE 1 A 18 FSJB3001 00A HARD CASE 1 A 19 FSJD2034 001 TRIM PLATE 1 A 20 QAM0012 003 16P CORD ASS Y ...

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