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JVC KD-SX975 Service Manual

Cd receiver
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Download this manual See also: Instruction Manual
SERVICE MANUAL
Contents
Preventing static electricity
Location of main parts
Disassembly method
CD RECEIVER
1-2
1-3
1-4
1-5
1-10
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
operation unit TOC read
Discription of major ICs
Area Suffix
U ---- Other Areas
1-11
1-13
1-13
1-14
No.49620
Feb. 2001

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  • Page 1: Table Of Contents

    KD-SX975 / KD-SX875 SERVICE MANUAL CD RECEIVER KD-SX975 / KD-SX875 Area Suffix U ---- Other Areas Contents Safety precaution Flow of functional 1-11 Preventing static electricity operation unit TOC read Location of main parts Maintenance of laser pickup 1-13 Disassembly method...

  • Page 2: Safety Precaution

    KD-SX975 / KD-SX875 Safety precaution 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. Please use enough caution not to see the beam directly or touch it in case of an...
  • Page 3 KD-SX975 / KD-SX875 Preventing static electricity 1.Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
  • Page 4 KD-SX975 / KD-SX875 Location of main parts Control unit Display Front PCB Antenna Changer control jack connector Main unit 16 pin connector RCA jack Main board Power IC Tuner pack Main board assembly Connector to front PCB CD mechanism Loading motor...
  • Page 5 KD-SX975 / KD-SX875 Disassembly method Removing the front chassis (See Fig.1) 1. Remove two screws A and insert a screwdriver to the joints a on the side of the front chassis and two joints b on the right side, then detach the front chassis toward the front side.
  • Page 6 KD-SX975 / KD-SX875 Main amplifier board CN501 Removing the main amplifier board assembly (See Fig.4 and 5) Remove the front chassis. Remove the bottom cover. Remove the two screws C attaching the main amplifier board assembly on the bottom of the body.

  • Page 7: Cd Mechanism Section

    KD-SX975 / KD-SX875 Damper bracket <CD mechanism section> CD mechanism assembly Removing the CD mechanism control board (See Fig.1 and 2) Unsolder the part a and b on the CD mechanism control board. Remove the stator fixing the CD mechanism control board and the damper bracket (To remove the stator smoothly, pick up the center part).
  • Page 8 KD-SX975 / KD-SX875 assembly Damper bracket CD mechanism Removing the CD mechanism assembly (See Fig.1, 6 to 9) Prior to performing the following procedure, remove the CD mechanism control board and the front bracket (loading motor). Remove the three screws D and the damper bracket.
  • Page 9 KD-SX975 / KD-SX875 Removing the feed motor assembly FD screw Part i Feed motor assembly (See Fig.10) Prior to performing the following procedure, remove the CD mechanism control board, the front bracket Part j (loading motor) and the CD mechanism assembly.

  • Page 10: Adjustment Method

    Power supply voltage DC14.4V(10.5 – 16V) Load impedance 4 (4 to 8 allowance) Line-out Level / Impedance: KD-SX975 : 4.0 V 20 k load (full scale) KD-SX875 : 2.0 V 20 k load (full scale) How to connect the extension cable for adjusting EXTGS004-26P...

  • Page 11: Flow Of Functional

    KD-SX975 / KD-SX875 Flow of functional operation unit TOC read Power ON When the laser diode correctly Set Function CD When the pickup correctly moves emits to the inner area of the disc Microprocessor $82 $81 Microprocessor Disc inserted commands...
  • Page 12 KD-SX975 / KD-SX875 Feed section Is the voltage output at Is the wiring for IC521 Is 5V present at IC581 IC521 pin "53" 5V or 0V? (90)~(100) correct? pin "20"? Check CD 9V Check the vicinity of and 5V. IC521.

  • Page 13: Maintenance Of Laser Pickup

    KD-SX975 / KD-SX875 Maintenance of laser pickup (1) Cleaning the pick up lens Before you replace the pick up,please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.

  • Page 14: Description Of Major Ics

    KD-SX975 / KD-SX875 Description of major ICs UPD178078GF-543 (IC701): SYSTEM CPU 1.Terminal layout 100 ~ 81 31 ~ 50 2.Block diagram TO0/VTR-CONT NC,JBUS-INT,SW1, 16-bit TIMER/ PORT 0 TI00/POWER REMOCON,PS1,PS2, EVENT COUNTER DETACH,NC TI01/CD-ON PORT 1 TI50/MUTE 8-bit TIMER/ KEY0,KEY1,KEY2,LEVEL, SM,OPEN.NC,...
  • Page 15 KD-SX975 / KD-SX875 3.Pin function UPD178078GF(1/2) FUNCTION Symbol Non connection JBUS-INT JVC BUS COMMUNICATION LINE JBUS-SI JVC BUS COMMUNICATION LINE JBUS-SO JVC BUS COMMUNICATION LINE JBUS-SCK JVC BUS COMMUNICATION LINE Non connection Non connection Non connection VOL-DA VOL IC COMMUNICATION LINE...
  • Page 16 KD-SX975 / KD-SX875 UPD178078GF(2/2) FUNCTION Symbol CD MECHA SW REMOCON REMOCON INPUT VTR-LOGIC Non connection VTR-CONT Non connection POWER POWER CONT. CD-ON CD POWER CONT. MUTE MUTE CONT Non connection BUZZER BEEP FOR SW OPERATION Non connection Non connection Non connection...
  • Page 17 KD-SX975 / KD-SX875 BA3220FV-X(IC341/IC441) : Line Out Amp 1.Terminal layout 3220 2.Block diagram OUTL OUTR RGND LGND REFR REFL FILTER 1-17...
  • Page 18 KD-SX975 / KD-SX875 BD3860K (IC301):E.Volume 1.Terminal layout 2.Bockdiagram GND FIL VCC SEL1 VIN1 LOUD1 HF1 LF1 DET1 VCA1 MIX1 BBOUT1 TIN1 TNF1 BNF1 BOUT1 POWER FADER SUPPLY MAIN INPUT OUTF1 CH1 FRONT TREBLE BASS VOLUME GAIN 0 -5 dB LOW(f=50Hz) 6dB...
  • Page 19 KD-SX975 / KD-SX875 HA13164(IC961):REGULATOR 1.Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2.Block diagram 100u 0.1u BATT.DET OUT ANT OUT Surge Protector 0.1u EXT OUT COMPOUT BIAS 0.1u VDD OUT ANT CTRL 0.1u...
  • Page 20 KD-SX975 / KD-SX875 HD74HC126FP-X (IC771) : Buffer 1.Terminal layout 3.Pin function Input Output Note: H : High L : Low X : H and L Z : H.L.X 2.Block diagram Output Input Output Sample as Load Circuit 1 Output Sample as Load Circuit 1...
  • Page 21 KD-SX975 / KD-SX875 LC75873NW(IC601):LCD Driver 1.Pin layout 2.Block diagram VDD1 COMON SEGMENT DRIVER DRIVER VDD2 CLOCK SHIFT REGISTOR GENERATOR ADDRESS DETECTOR 3.Pin function Pin No. Pin name Description Segment outouts for displaying the display data S1/P1 TO S4/P4 79,80 transferred by serial data input.
  • Page 22 KD-SX975 / KD-SX875 LA4743K(IC351):Power AMP 1.Block diagram 2200 F 0.022 F Vcc 1/2 Vcc 3/4 IN 1 OUT 1+ 0.22 F OUT 1- PWR GND1 Protective circuit OUT 2+ IN 2 OUT 2- 0.22 F PWR GND2 ST BY Stand by...
  • Page 23 KD-SX975 / KD-SX875 2.Terminal layout 3.Pin function LA4743K Pin No. Symbol Function Header of IC Power GND Outpur(-) for front Rch OUTFR- STBY Stand by input OUTFR+ Output (+) for front Rch VCC1/2 Power input OUTRR- Output (-) for rear Rch...
  • Page 24 KD-SX975 / KD-SX875 LA6567H-X(IC581):CD DRIVER 1.Pin layout & blockdiagram CH 3,4,5 Thermal shutdown VCC2 Power supply V05- V05+ S-GND V04+ VCONT V04- VIN4 V03+ VIN4G Signal system power supply V03- VCC-S V02+ VREF-IN 5VREG(PNPTr The outside putting) V02- REG-OUT V01+...
  • Page 25 KD-SX975 / KD-SX875 2. Pin function LA6567H-X(2/2) Pin no. Symbol Function VCC2 CH3,4,5 Power supply( It is short with VCC1,VCC-S) V05- Loading output(-) V05+ Loading terminal (+) V04+ CH4 Output terminal(+) V04- CH4 Output terminal(-) V03+ CH3 Output terminal(+) V03-...
  • Page 26 KD-SX975 / KD-SX875 TA2109F-X (IC501) : RF amp. 1. Pin layout 2. Block diagram 15k ohm 30k ohm 7.67k ohm 15k ohm 10k ohm SBAD 10k ohm 20uA 50k ohm 30k ohm 20pF 36pF 10k ohm 10k ohm 21k ohm 29k ohm 2VRO 7.96k ohm...
  • Page 27 KD-SX975 / KD-SX875 TC9462F(IC521): 1.Pin layout & Block Diagram 50 V Servo 49 TRO 1bit control Clock 48 FOO generator TEZI 46 TEI 45 TSIN TEST1 44 SBAD Digital equalizer TEST2 43 FEI Address circuit Automatic adjustment TEST3 42 RFRP...
  • Page 28 KD-SX975 / KD-SX875 TC9462F(2/3) Symbol Function Remarks Pin No. 2/4 times speed at "VREF" voltage. 2-state output HSSW (PVREF,HiZ) 1 bit DA converter zero detect flag output terminal. ZDET Phase difference signal output terminal of EFM 3-state output. signal and PLCK signal.
  • Page 29 KD-SX975 / KD-SX875 TC9462F(3/3) Symbol Function Remarks Pin No. Test input terminal, Normally, keep at "L" level Analog input. TESIN Test input/output terminal. Normally, keep at "L" level Analog input. TESIO1 Digital GND terminal Crystal oscillator connecting input terminal for DSP...
  • Page 30 KD-SX975 / KD-SX875 NJM4565M-WE (IC111) : Ope. amp A OUTPUT B OUTPUT A INPUT A INPUT B INPUT B INPUT RPM6938-SV4(IC602) : Remote Censor 1.Block diagram Comp Rout Detector conversion trimming circuit magnetic shield 1-30...
  • Page 31 KD-SX975 / KD-SX875 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan Printed in Japan (No.49620) 200102(V)
  • Page 32 KD-SX975/KD-SX875 CD Mechanism ENC 1,2 SYSTEM VOLUME JOG CD PICKUP UNIT MECHA. SWITCH CONTROLLER EN601 SW1~4 IC701 uPD178078GF-543 REMOCON SPINDLE/FEED REMOTO CONTROL VOL CL MOTOR RECEIVER VOL DA IC680 SPINDLE RPM6938-SV4 FEED CD LPF TRACKING IC111 LOADING MOTOR FOCUS KEY0~2...
  • Page 33 KD-SX975 / KD-SX875 < M E M O >...

  • Page 34: Standard Schematic Diagrams

    KD-SX975/KD-SX875 Standard schematic diagrams D951 R952 C952 0.047 1SS133 Receiver & system control section C951 1/50 IC351 LA4743K QAU0223-001 C351 2.2/50 33uH R351 R352 R324 R201 C203 1/50 C308 470P C352 R323 R101 2.2/50 IC341 BA3220FV C341 C103 100/10 1/50 0.1/50...
  • Page 35 KD-SX975/KD-SX875 KD-SX975/KD-SX875 Mecha control circuit section R583 2.4K R582 8.2K R584 5.6K R212 R215 8.2K( 1/10W) C583 0.47 R211 C211 4.7/25 R213 47/6.3 R585 R-CH C213 120P LOADING- C113 LOADING+ 120P R581 B582 R111 C111 4.7/25 R113 0( 1/8W) REST...
  • Page 36 KD-SX975/KD-SX875 LCD driver & operation switch section QNZ0449-001 IC602 EN601 RPM6938-SV4 QSW0793-001 R657 REMOCON ACC5V R658 D657 ENC1 ENC2 UDZS5.6B-X ENC2 LCDCE R661 3.3K ENC1 LCDDA R662 3.3K R652 R653 R654 3.3K LCDCL R663 1K( 1/8W) KEY2 KEY1 R651 KEY0...
  • Page 37 KD-SX975/KD-SX875 KD-SX975/KD-SX875 Printed circuit boards Main board Main board (Forward side) (Reverse side) L961 C960 IC961 C371 J931 CN901 D962 C372 D963 R966 D960 J771 C965 C963 B962 C772 C981 R965 C964 C961 R471 C359 C962 C356 D964 C969 C968...
  • Page 38 KD-SX975/KD-SX875 Front board(Forward side) D601 IC602 D629 R606 S605 R607 S613 S614 S608 D628 R605 R604 D611 D613 D623 D622 S615 D624 D617 D614 S607 S604 S606 S609 D615 D612 LCD1 S603 D616 EN601 D621 D607 D620 D605 S616 S617...

  • Page 39: Parts List

    KD-SX975/KD-SX875 PARTS LIST [ KD-SX975 ] [ KD-SX875 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix U --------------------- Other Areas - Contents - Exploded view of general assembly and parts list...
  • Page 40 KD-SX975/KD-SX875 Exploded view of general assembly and parts list Block No.
  • Page 41 1 LOCK LEVER(O.L.) FSKW4013-002 T.SPRING 1 FOR OPEN LEVER VYTA526-002 BLIND GE10005-001A FRONT PANEL 1 KD-SX875 GE10005-002A FRONT PANEL 1 KD-SX975 GE30113-008A FINDER ASSY 1 KD-SX975 GE30113-009A FINDER LENS 1 KD-SX875 FSJK4009-001 REMOTE LENS 1 FOR REMOTE CON. GE20104-001B PRESET BUTTON...
  • Page 42 RUBBER CONNECTO GE30114-001A LCD CASE FSJK3028-001 LCD LENS FSYH4061-001 LIGHTNG SHEET FSYH4036-052 SHEET FSKS3013-001 LENS CASE GE30155-002A NAME PLATE 1 KD-SX975 GE30154-002A NAME PLATE 1 KD-SX875 VMA4652-001SS EARTH PLATE FSKL4024-001 IC BRACKET GE40103-001A REG BRACKET GE40104-002B HEAT SINK FSKM3010-017 REAR BRACKET...
  • Page 43 KD-SX975/KD-SX875 CD mechanism assembly and parts list Block No. Grease TN-CCD1001Z-136J G-31SA G-31SA(Bottom side) RX-405 106 29...
  • Page 44 KD-SX975/KD-SX875 Parts list (CD mechanism) Block No. M2MM Item Parts number Parts name Q'ty Description Area 30310101T FRAME 30310103T DANPER PIN 30310107T UPPER PLATE 30310108T SEL STOP PLATE 30310142T SEL ARM (L)L 30310143T SEL ARM (R)L 30310145T S ARM SPRING(L)
  • Page 45 KD-SX975/KD-SX875 Parts list (CD mechanism) Block No. M2MM Item Parts number Parts name Q'ty Description Area 64180403T DET SWITCH 2 ESE22MH3 68150232T CONNECTOR 1 TKC-W26X-C1 30311105T SOPPORT PLATE 30311138T GR MT BLK(N) 30311109T LDG GEAR (2) 30311110T LDG GEAR (3)
  • Page 46 KD-SX975/KD-SX875 Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area BZ871 QAN0009-001Z BUZZER C 356 NCB31HK-223X C CAPACITOR NCB31EK-473X C CAPACITOR C 357 NCB31HK-223X C CAPACITOR QERF1HM-104Z E CAPACITOR .10MF 20% 50V...
  • Page 47 KD-SX975/KD-SX875 Electrical parts list (Main board) Block No. 01 Item Remarks Parts number Parts name Area Item Parts number Parts name Remarks Area C 544 QERF0JM-107Z E CAPACITOR 100MF 20% 6.3V C 993 NCS31HJ-101X C.CAPACITOR C 545 NCB31EK-473X C CAPACITOR...
  • Page 48 KD-SX975/KD-SX875 Electrical parts list (Main board) Block No. 01 Item Remarks Parts number Parts name Area Item Parts number Parts name Remarks Area L 551 QQL244J-4R7Z INDUCTOR R 302 NRSA63J-224X MG RESISTOR L 701 QQL244J-4R7Z INDUCTOR R 303 NRSA63J-682X MG RESISTOR...
  • Page 49 KD-SX975/KD-SX875 Electrical parts list (Main board) Block No. 01 Item Remarks Parts number Parts name Area Item Parts number Parts name Remarks Area R 475 NRSA02J-101X MG RESISTOR R 729 NRSA63J-473X MG RESISTOR R 476 NRSA02J-101X MG RESISTOR R 731...
  • Page 50 KD-SX975/KD-SX875 Electrical parts list (Front board) Block No. 02 Item Remarks Parts number Parts name Area Item Parts number Parts name Remarks Area C 601 NBE20JM-475X TS E CAPACITOR R 611 NRSA63J-272X MG RESISTOR C 602 NCB31HK-103X C CAPACITOR R 612...
  • Page 51 KD-SX975/KD-SX875 < M E M O > 3-13...
  • Page 52 KD-SX975/KD-SX875 Packing materials and accessories parts list Block No. Block No. KIT:A4 3-14...

  • Page 53: Kd-Sx975/Kd-Sx875

    POLY BAG 1 FOR INST. BOOK QPA00801205 POLY BAG QPA01003003 POLY BAG FSYH4036-068 SHEET QPC03004315P POLY BAG GE30123-020A CARTON 1 KD-SX975 GE30123-019A CARTON 1 KD-SX875 GE10008-001A EPS CUSHION Parts list (Accessories) Block No. M4MM Item Parts number Parts name Q'ty...

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