JVC KD-SX950 Service Manual
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JVC KD-SX950 Service Manual

JVC KD-SX950 Service Manual

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KD-SX950
VICTOR COMPANY OF JAPAN, LIMITED
MOBILE ELECTRONICS DIVISION,10-1,1Chome,Ohwatari-machi,maebashi-city,Japan
(No.49539)
SERVICE MANUAL
Contents
Instructions
Printed in Japan
200002(V)
CD RECEIVER
KD-SX950
CD CHANGER CONTROL
SCM
DISP
INT
7
8
9
10
11
12
BBE
1-2
1-3~16
2-1
2-6
2-7
This service manual is made from 100% redycled paper.
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
KD-SX950
Area Suffix
J ---- Northerm America
MO
RND
SSM
RPT
SCAN
CD
FM/AM
CD
-CH
2-9
2-10
2-26
2-27
2-29~31
3-1~
No.49539
Feb. 2000

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Summary of Contents for JVC KD-SX950

  • Page 1: Table Of Contents

    KD-SX950 KD-SX950 SERVICE MANUAL CD RECEIVER KD-SX950 Area Suffix J ---- Northerm America CD CHANGER CONTROL DISP SCAN FM/AM Contents Maintenance of laser pickup Safety precaution Description of major ICs 2-10 Instructions 1-3~16 Block diagram 2-26 Disassembly method Standard schematic diagrams...

  • Page 2: Safety Precaution

    Safety precaution ! 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. ! CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

  • Page 3: Disassembly Method

    Disasembly method Removing the front panel unit 1.Press the Eject button to open the front panel unit (See fig 1) 2.Push and open the right and left open/close shaft arms Front panel unit Eject button outward to remove the shaft.(See fig 2) Fig 1 3.Remove the front panel unit from the same side as the shaft was removed.
  • Page 4 Removing the main board(wiht rear panel) (See fig6.7) 1.Remove three screws E retaining the rear panel to the chassis 2.Remove one screw C retaining the IC to the heat sink. 3.Remove two screws D retaining the main bord. 4.Lift up the main board to remove it. 5.Remove two screws B to remove the heat sink.
  • Page 5 Damper bracket Removing the CD mechanism control CD mechanism ass’y board(See Fig.1 and 2) Unsolder the part f and g 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 6 Removing the loading motor Loading motor (See Fig.3 to 5) Prior to performing the following procedure, remove the CD mechanism control board. Belt Remove the two springs k attaching the CD mechanism ass’y and the front bracket. Fig.5 Remove the two screws G and the front bracket while pulling the flame outward.
  • Page 7 Removing the feed motor ass’y Part n FD screw (See Fig.10) Feed motor ass’y Prior to performing the following procedure, remove the CD mechanism control board, the front bracket Part O (loading motor) and the CD mechanism ass’y. Remove the two screws K and the feed motor ass’y. Pickup unit Pickup unit FD gear...

  • Page 8: Adjustment Method

    6. Digital tester MW 522kHz ~ 1620 kHz 7. Tracking offset meter LW 144kHz ~ 279kHz 8. Test Disc JVC :CTS-1000 9. Extension cable for check EXTGS004-26P 1 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...

  • Page 9: Flow Of Functional Operation Until Toc Read

    Flow of functional operation until TOC read Power ON • When the laser diode correctly Set Function to CD • When the pickup correctly moves emits to the inner area of the disc Microprocessor Microprocessor Disc inserted commands commands TC9462 "53" Pickup feed to the inner area FEED MOTOR +TERMINAL...
  • Page 10 Feed Section Check CD 9V Is the voltage output at Is the wiring for IC521 Is 5V present at IC581 and 5V. IC521 pin "53" 5V or 0V? (90) ~ (100) correct? pin "11"? Check the vicinity of IC521. Is 4V present at both Is 6V or 2V present at Check the feed motor sides of the feed motor?

  • Page 11: Maintenance Of Laser Pickup

    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 12 BA3220FV-X (IC301,IC401) : Driver 1. Pin layout & Block diagram LGND OUTL OUTR RGND CR - CR + REFL REFR FILTER 2. Pin functions Symbol Function Powe supply terminal for amp. power supply terminal. input terminal. Negative feedback terminal. Filter terminal. Negative feedback terminal.
  • Page 13 BA4905-V3 (IC961) : Regulator 1.Terminal layout 2.Block daigram REGULATOR RESET RESET COMP VDD 5.7V CD 8V AUDIO 9V CTRL ILM 10V 3.Pin function Pin no. Symbol Function RESET If VDD voltage becomes 4V or less.RESET output becomes low level. EXT output This output voltage is approximately 0.5V lower than VCC.
  • Page 14 BD3860K (IC911) : E. volume 1. Pin layout 2. Block diagram GND FIL VCC SEL1 VIN1 LOUD1 HF1 LF1 DET1 VCA1 MIX1 BBOUT1 TIN1 TNF1 BNF1 BOUT1 POWER FADER SUPPLY MAIN INPUT CH1 FRONT OUTF1 TREBLE BASS VOLUME GAIN 0 to -5 dB LOW(f=50Hz) 6dB 0 to -40 dB -14 to +14dB...
  • Page 15 BU4066BCF-X (IC153) : Switch 1.Terminal Layout 2.Block Diagram...
  • Page 16 HD74HC126FP-X (IC771) : Buffer 1. Pin layout 2. Function Inputs Outputs 3. Block diagram Output Input Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 Output Sample as Load Circuit 1...
  • Page 17 IC-PST600M/G/-W (IC702) : System reset Vout...
  • Page 18 LA4743B (IC351) :Power amp 1.Terminal layout 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 2.Block diagram VCC1/2 VCC3/4 IN 1 OUT 1+ OUT 1- Protective PWR GND1 circuit...
  • Page 19 LA6557-X(IC581):Driver 1.Terminal layout 2.Block diagram CH3,4,5 Thermal shutdown VCC2 POWER V05- V05+ S-GND MUTE is as follows: High : Output ON Low : Output OFF V04+ MUTE MUTE V04- VIN+ V03+ VIN4- V03- VCC-S Signal System Power V02+ VREF-IN SVREG (External PNPTr) V02- REG-OUT V01+...
  • Page 20 3.Pin function LA6557-X(2/2) Pin NO. Symbol Function VCC2 Power for channels 3,4, and 5 (VCC1 and VCC-S short-circuited) V05- Loading output (-) V05+ Loading output (+) V04+ Output pin (+) for channel 4 V04- Output pin (-) for channel 4 V03+ Output pin (+) for channel 3 V03-...
  • Page 21 LC75873NW (IC601) : LCD Driver 1.Block Diagram VDD1 COMMOM SEGMENT DRIVER DRIVER VDD2 CLOCK SHIFT REGISTER GENERATOR ADDRESS DETECTOR 2.Pin Functions Pin No. Symbol Description 1~66 S3~S68 Segment Output. 67~69 COM1~3 Common Driver Output. Power Supply Connection. VDD1 Used for applying the LCD drive 2/3 bias voltage externally. Must be connected to VDD2 when a 1/2 bias drive scheme in used.
  • Page 22 NJM2100M-WE (IC821) : Cruise 1. Pin layout A OUTPUT A -INPUT B OUTPUT A +INOUT B -INPUT B +INPUT 2. Block diagram -INPUT OUTPUT +INPUT...
  • Page 23 NJM4565M-WE (IC111) : Ope. amp A OUTPUT A INPUT B OUTPUT B INPUT A INPUT B INPUT...
  • Page 24 RPM6938-SV4 (IC602) : Remote control receiver Comp Rout Detector conversion trimming circuit magnetic shield...
  • Page 25 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 10k ohm 36pF 21k ohm 29k ohm 10k ohm 2VRO 7.96k ohm 10k ohm 24k ohm 24k ohm...
  • Page 26 TB2118F-X (IC21) : PLL 1.Terminal Layout 2.Block diagram Constant power supply voltage Buff. ON/OFF AM CP. Phase OSC circuit Reference Counter Comparator switch FM VCO 4-bit Prescaler Swallow counter 12-bit AMVCO Programmable counter REG. 20-bit BINARY COUNTER Resistor 1 22-bit Resistor 2 40bit shift register Serial...
  • Page 27 TC9462F (IC521) : DSP & DAC 1.Pin Layout 2.Pin Function (1/2) Symbol Function Pin No. Test mode terminal. Normally, keep at open TEST0 Playback speed mode flag output terminal Playback speed mode flag output terminal UHSO Sub code Q data emphasis flag output terminal. "H"=ON "L"=OFF EMPH Channel clock output terminal.(44.1kHz) "H"=Rch "L"=Lch LRCK...
  • Page 28 2.Pin Function (2/2) Symbol Function Pin No. RFRP signal center level input terminal RFCT RFRP zero cross input terminal RFZI RF ripple signal input terminal RFRP Focus error signal input terminal Sub-beam adder signal input terminal SBAD Test input terminal Normally, keep at "vref" level TSIN Tracking error signal input terminal.

  • Page 29: Description Of Major Ics

    Description of major ICs UPD784215GC-157 (IC701) : UNIT CPU 1.Terminal Layout 2.Pin Function (1/2) Function Symbol Pin No. Detection switch of CD mechanism Detection switch of CD mechanism Detection switch of CD mechanism Reset signal input from CD mechanism REST Loading motor control signal output Loading motor control signal output Non connect...
  • Page 30 Pin Function (2/2) Function Symbol Pin No. BUSSI J-BUS data input BUSSO J-BUS data output BUSSCK J-BUS Clock signal I/O BUSI/O I/O selector output for J-BUS, H:OUT L:IN LCDDA Data output to LCD driver LCDSCK Clock output to LCD driver LCDCE Chip enable output to LCD driver BUZZER...

  • Page 31: Block Diagram

    Block diagram...
  • Page 32 Power amplifier circuit TUNER SIGNAL CD.L SIGNAL CD CHANGER.L SIGNAL FRONT.L SIGNAL REAR.L SIGNAL...

  • Page 33: Standard Schematic Diagrams

    Stadard schematic diagrams CD servo control & LCD driver circuit CD SIGNAL...

  • Page 34: Printed Circuit Boards 2-29~31

    Printed circuit boards Main board (parts side)
  • Page 35 Main boartd (Solder side)
  • Page 36 Switch board (Parts side) (Solder side)

  • Page 37: Parts List

    PARTS LIST [ KD-SX950 ] * All printed circuit boards and its assemblies are not available as service parts. Areas suffix J -------------- Northern America - Contents - Exploded view of general assembly and parts list CD mechanism assembly and parts list...
  • Page 38 Exploded view of general assembly and parts list Block No.
  • Page 39 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area ZCKDSX950J-NPA F.PANEL ASS'Y FSJC1058-001 FRONT PANEL FSJD3024-01E FINDER LENS FSJC1029-021 TOP CHASSIS FSMH3001-003 SIDE PANEL FSKM3011-002 BOTTOM COVER FSMA3005-001 INSULATOR QYSDST2604Z SCREW 3 CHASSIS+CD MECH FSKZ4005-001 SCREW QYSDST2606Z...
  • Page 40 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area VKS3795-002 LOCK LEVER(R) VKS5563-001 GEAR VKZ4786-002 OIL DAMPER VYTA526-002 BLIND FSKW4013-002 T.SPRING 1 FOR OPEN LEVER FSKW4012-002 T.SPRING 1 FOR L.LEVER(TOP VKW5262-001 T.SPRING 1 FOR L.LEVER(R) VKW5263-002 T.SPRING 1 FOR L.LEVER(L)
  • Page 41 CD mechanism assembly and parts list Block No. Grease G-31SA G-31SA(Bottom side) RX-405 106 29...
  • Page 42 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) 30310112T TRIG LEVER 30310155T TRIG PL(Z)
  • Page 43 Parts list (CD mechanism) Block No. M2MM Item Parts number Parts name Q'ty Description Area 30311035T FPC HOLDER(Z) 19501403T WIRE CLAMPER 30311037T PICK UP FPC(Z) 30311036T CONNECT.PCB(Z-J 30311038T WIRE (5P-Z) 30311039T WIRE (LD-Z) 30311040T WIRE (FD-Z) 30311041T WIRE (RS-Z) 64180402T DET SWITCH 2 ESE22MH1 64180403T...
  • Page 44 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area BZ871 QAN0009-001Z BUZZER C 322 QER41AM-107 E CAPACITOR 100MF 20% 10V NCB21EK-473X C CAPACITOR C 323 QERF1HM-104Z E CAPACITOR .10MF 20% 50V QERF1HM-104Z E CAPACITOR...
  • Page 45 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 531 QERF0JM-107Z AL E.CAPACITOR 100MF 20% 6.3V C 968 QER41AM-227 E CAPACITOR 220MF 20% 10V C 532 NCB21HK-103X C CAPACITOR C 969...
  • Page 46 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area QQL244J-4R7Z INDUCTOR R 163 NRSA02J-104X MG RESISTOR L 521 QQL244J-4R7Z INDUCTOR R 164 NRSA02J-104X MG RESISTOR L 551 QQL244J-4R7Z INDUCTOR R 165...
  • Page 47 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area R 475 NRSA02J-101X MG RESISTOR R 731 NRSA02J-222X MG RESISTOR R 476 NRSA02J-101X MG RESISTOR R 732 NRSA02J-222X MG RESISTOR R 501 NRSA02J-473X...
  • Page 48 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area 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...
  • Page 49 Electrical parts list (Switch board) Block No. 02 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 601 NBE20JM-475X TS E CAPACITOR R 625 NRS181J-431X MG RESISTOR C 602 NCB21HK-103X C CAPACITOR R 626 NRS181J-271X MG RESISTOR C 603...
  • Page 50 Packing materials and accessories parts list Block No. Block No. A1,A2,A4 A21~A26 KIT2:A14,A15,A16 KIT1:A7 A11 A12,A13 : Remocon : Trim Plate A13 : Battery SCREW KIT 1 : Plug nut SCREW KIT 2 : Hook : Mount bolt : Car Cable : Screw A9: Lock nut : Sheet...
  • Page 51 FSJB3001-00A HARD CASE A 19 FSJD2034-001 TRIM PLATE A 20 QAM0012-003 16P CORD ASS'Y A 21 BT-20071B JVC CENTER LIST 1 FOR CANADA A 22 LV40981-001A IMPORTANT SHEET 1 RESET CAUTION S A 23 LVT0326-001C TROUBLE SHOOTIN A 24 LV41417-001A...

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