JVC KD-SX985 Service Manual
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JVC KD-SX985 Service Manual

JVC KD-SX985 Service Manual

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QQ
3 7 63 1515 0
SERVICE MANUAL
TE
L 13942296513
Contents
Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
www
.
http://www.xiaoyu163.com
CD RECEIVER
KD-SX985
ATT
SOUND
U
R
SOURCE
F
D
VOL
VOL
1-2
1-3
1-4
1-19
x
ao
u163
y
i
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
http://www.xiaoyu163.com
2 9
8
Q Q
3
6 7
1 3
1 5
Flow of functional
operation unit TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
co
.
KD-SX985
9 4
2 8
0 5
8
2 9
9 4
2 8
Area Suffix
U
Other Areas
1-20
1-22
1-22
1-23~44
m
9 9
9 9
No.49731
Jun. 2002

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  • Page 1 KD-SX985 3 7 63 1515 0 SERVICE MANUAL CD RECEIVER KD-SX985 SOUND SOURCE L 13942296513 Area Suffix Other Areas Contents Safety precaution Flow of functional Preventing static electricity operation unit TOC read 1-20 Disassembly method Maintenance of laser pickup...

  • Page 2: Safety Precaution

    KD-SX985 3 7 63 1515 0 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 adjustment or operation check.
  • Page 3 KD-SX985 3 7 63 1515 0 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-SX985 3 7 63 1515 0 Disassembly method Removing the front panel unit (See Fig.1) Press the release switch and remove the front panel unit in the direction of the arrow. Front panel unit Removing the bottom cover Fig.1 (See Fig.2,3)
  • Page 5 KD-SX985 3 7 63 1515 0 Removing the heat sink (See Fig.6) Remove the four screws C attaching the heat sink on the left side of the body, and remove the heat sink. Heat sink Fig. 6 Removing the rear panel (See Fig.7 )
  • Page 6 KD-SX985 3 7 63 1515 0 Removing the MP3 board (See Fig.9) Prior to performing the following procedure, remove the top cover. Disconnect the wire from connector CN601on the MP3 board. Remove the five screws G and the MP3 board, CN601 releasing the joint f and g.
  • Page 7 KD-SX985 3 7 63 1515 0 Removing the (LCD & key) control switch board (See Fig.11 ~ 13) Prior to performing the following procedure, remove the front panel assembly. Remove the four screws I attaching the rear cover on the back of the front panel assembly.
  • Page 8 KD-SX985 < CD mechanism section > 3 7 63 1515 0 Removing the top cover (See Fig.1 and 2) Remove the two screws A on each side of the body. Top cover Joints a Lift the front side of the top cover and move the cover backward to release the two joints a.
  • Page 9 KD-SX985 3 7 63 1515 0 Removing the DET switch (See Fig.3 and 6) Extend the two tabs c of the feed sw. holder and pull out the switch. DET switch Unsolder the DET switch wire if necessary. Connector board Removing the chassis unit (See Fig.7 and 8)
  • Page 10 KD-SX985 3 7 63 1515 0 Removing the clamper assembly (See Fig.9 and 10) Prior to performing the following procedure, remove Clamper arm the top cover. spring Remove the clamper arm spring. Move the clamper assembly in the direction of the arrow to release the two joints d.
  • Page 11 KD-SX985 3 7 63 1515 0 Feed sw. holder Removing the pickup unit (See Fig.13 to 17) Joint f Prior to performing the following procedure, remove the top cover, the connector board and the chassis unit. Remove the screw D and pull out the pu.
  • Page 12 KD-SX985 3 7 63 1515 0 Removing the trigger arm (See Fig.18 and 19) Joint k Prior to performing the following procedure, remove the top cover, the connector board and the clamper unit. Trigger arm Turn the trigger arm in the direction of the arrow to release the joint k and pull out upward.
  • Page 13 KD-SX985 3 7 63 1515 0 Joint a' Link plate Joint r Removing the select arm (L) / select lock Select arm (L) Joint z Select arm (R) arm (See Fig.21 and 22) Select lock arm Prior to performing the following procedure, remove the top plate assembly.
  • Page 14 KD-SX985 3 7 63 1515 0 Joint a' Link plate Joint r Removing the select arm (R) / link plate Select arm (L) Joint z Select arm (R) (See Fig.21 and 22) Select lock arm Prior to performing the following procedure, remove the top plate assembly.
  • Page 15 KD-SX985 3 7 63 1515 0 Roller guide Removing the loading roller assembly Washer (See Fig.27 to 29) Loading roller assembly Prior to performing the following procedure, remove the clamper assembly and the top plate assembly. Roller guide Push inward the loading roller assembly on the gear side and detach it upward from the slot of the joint d’...
  • Page 16 KD-SX985 3 7 63 1515 0 Removing the loading gear (5), (6) and Loading gear bracket (7) (See Fig.31 and 32) Loading gear (6) Prior to performing the following procedure, remove the top cover, the chassis unit and the top plate assembly.
  • Page 17 KD-SX985 3 7 63 1515 0 Removing the gears (See Fig.33 to 36) Prior to performing the following procedure, remove the top cover, the chassis unit, the top plate assembly and the pickup unit. Slot j' Pull out the feed gear.
  • Page 18 KD-SX985 3 7 63 1515 0 Removing the turn table / spindle motor Turn table (See Fig.37 and 38) Prior to performing the following procedure, remove the top cover, the connector assembly and the chassis / clamper assembly. Remove the two screws K...
  • Page 19 KD-SX985 3 7 63 1515 0 Adjustment method Test instruments required adjustment Standard volume position 1.Digital oscilloscope (100MHz) Balance and Bass & Treble volume : Indication "0" 2.AM Standard signal generator Loudness : OFF 3.FM Standard signal generator 4.Stereo modulator 5.Electric voltmeter...
  • Page 20 KD-SX985 3 7 63 1515 0 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...
  • Page 21 KD-SX985 3 7 63 1515 0 Feed section Is the voltage output at Is the wiring for IC521 Is 3.3V present at IC561 IC521 pin "40" 5V or 0V? (56)~(64) correct? pin "20"? Check CD 8V Check the vicinity of and 5V.
  • Page 22 KD-SX985 3 7 63 1515 0 Maintenance of laser pickup (1) Cleaning the pickup lens Before you replace the pickup,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.
  • Page 23 KD-SX985 3 7 63 1515 0 Description of major ICs UPD784225GK-624 (IC501) : CPU 1.Pin layout 2.Pin function Symbol Function Function Symbol Connect to TEMP detecter Non use TEMP Connect to GND Non use Connect to GND Non use...
  • Page 24 KD-SX985 3 7 63 1515 0 UPD784215AGC175 (IC701) : Main micon 1.Pin layout 100 ~ 76 26 ~ 50 2.Pin functions(1/2) Pin No. Symbol Function CD RESET Reset output for CD sub-micon CD MUTING Muting request of CD sub-micon...
  • Page 25 KD-SX985 3 7 63 1515 0 2.Pin functions(2/2) Pin No. Symbol Function SD/ST Station detector or stereo indicator input MONO Monoral selection output H:Monoral 56~60 DETACH Detach detect input H:Detach SEEK/STOP Auto seek and stop selecting output FM/AM FM,AM band selecting output H:FM...
  • Page 26 KD-SX985 3 7 63 1515 0 TC94A14FA (IC621) : DSP & DAC 1.Terminal layout & block daiagram Clock generator 1-bit Servo control Digital equalizer Address automatic circuit adjustment circuit Data CLV servo slicer 16 k Synchronous guarantee L 13942296513...
  • Page 27 KD-SX985 3 7 63 1515 0 TC94A14FA Symbol Description EFM and PLCK phase difference signal output pin. TMAX TMAX detection result output pin. TMAX Detection Result TMAX Output Longer than fixed period "PV " Within fixed period "HiZ" Shorter than fixed period "AV...
  • Page 28 KD-SX985 3 7 63 1515 0 TA2157FN-X(IC501):RF amp 1.Terminal layout 2.Block diagram PEAK 50 A L 13942296513 BOTTOM PEAK 1.75k 240k 15pF x0.5 240k 15pF x0.5 180k 40pF RFGC (APC SW) (TE BAL) (AGC Gian) (TE BAL) VCTRLPIN Normal mode...
  • Page 29 KD-SX985 3 7 63 1515 0 3.Pin function TA2175FN-X Pin No. Symbol Function 3.3V power supply pin Main-beam amp input pin Main-beam amp input pin Sub-beam amp input pin Sub-beam amp input pin Monitor photo diode amp input pin...
  • Page 30 KD-SX985 3 7 63 1515 0 LA6579H-X (IC681) : 4-Channel bridge driver 1. Pin layout & Block diagram VIN1-A VIN1 VIN1_SW [H]: OP-AMP_A [L]: OP-AMP_B VIN1+A VIN1-B VCCP1 VIN1+B Signal system S-GND power supply VIN1-SW All outputs ON/OFF H : ON...
  • Page 31 KD-SX985 3 7 63 1515 0 3.Pin function Pin No. Symbol Function CH1 input AMP_inverted input VIN1-A CH1 input AMP_non-inverted input VIN1+A CH1 and CH2 power stage power supply VCCP1 Output pin(+)for channel 1 VO1+ CH1 output pin (-) for channel 1...
  • Page 32 KD-SX985 3 7 63 1515 0 TC94A02F-005(IC651) : DSP AD10 VDDT LRCKiA BCKiA SDi0 L 13942296513 AD13 VDDT AD14 /MiCK AD16 MiDio AD15 MiMD /RESET Timing Generator General Input Port u163 1-32 http://www.xiaoyu163.com...
  • Page 33 KD-SX985 3 7 63 1515 0 3.Pin function(1/2) TC94A02F-005 Pin No. Symbol Function Hard reset input terminal(H:Normal operation L: Reset) /RESET Micon I/F mode select input terminal MiMD External SRAM address output 0 terminal External SRAM address output 1 terminal...
  • Page 34 KD-SX985 3 7 63 1515 0 3.Pin function(2/2) TC94A02F-005 Pin No. Symbol Function External SRAM data input/output 4 terminal Digital power supply (2.5V) terminal External SRAM data input/output 5 terminal External SRAM data input/output 6 terminal External SRAM data input/output 7 terminal...
  • Page 35 KD-SX985 3 7 63 1515 0 BR24C01AFV-W-X (IC502) : EEPROM 1.Pin layout 2.Block diagram 1kbit EEPROM ARRAY 8bit 7bit SLAVE/WORD ADDRESS DATA 7bit ADDRESS REGISTER DECODER REGISTER START STOP CONTROL LOGIC L 13942296513 HIGH VOLTAGE GEN. Vcc LEVEL DETECT 3.Pin function...
  • Page 36 KD-SX985 3 7 63 1515 0 BR24C16F-X (IC771) : EEPROM 1. Pin layout 2. Pin function Symbol I/O Function Power supply. A0,A1,A2 No use connect to GND. Serial clock input. Serial data I/O of slave and ward address. Write protect terminal.
  • Page 37 KD-SX985 3 7 63 1515 0 HA13164A (IC911) : 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...
  • Page 38 KD-SX985 3 7 63 1515 0 HD74HC126FP-X (IC801) : Buffer 1.Terminal layout 3.Pin function Input Output Note) H:High level L:Low level X:Irrelevant Z:Off(High-impedance) State a 3-state input 2.Block diagram Output Input L 13942296513 Output Sample as Load Circuit 1...
  • Page 39 KD-SX985 3 7 63 1515 0 HD74HCT126T-X (IC503) : Buffer 1.Terminal layout 3.Pin function OUTPUT INPUT H : High level L : Low level X : Irrelevant Off (Hhigh-impedance)state of a 3-stage output 2.Block diagram L 13942296513 u163 1-39...
  • Page 40 KD-SX985 3 7 63 1515 0 LA47503 (IC301) : Power amp 1. Pin layout 2. Block diagram Mute circuit Muting & Ripple ON Time control filter Circuit Stand by switch 3.Pin function Pin No. Symbol Function Header of IC...
  • Page 41 KD-SX985 3 7 63 1515 0 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 42 KD-SX985 3 7 63 1515 0 PCM1716E-X (IC571) : D/A converter 1. Pin layout 2. Block diagram Serial VoutL Low-pass Filter Input LBCK Mult-level EXTL 8X Oversampling DATA Delta-Sigma Digital Filter Low-pass VoutR Modulator Filter with ML/llS Function Controller...
  • Page 43 KD-SX985 3 7 63 1515 0 RPM7138-V4(IC602):Remote control receiver Limiter Comparator Detection crimp TDA7404D-X(IC161):Carradio signal processor 1.Terminal layout 2.Block diagram Mono Fader Mono Fader Mono Fader L 13942296513 Mono Fader Mono Fader Mono Fader Zero Cross Mono/Beep Beep Digital Control I C-Bus...
  • Page 44 KD-SX985 3 7 63 1515 0 TB2118F-X (IC31) : 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.
  • Page 45 KD-SX985 3 7 63 1515 0 < M E M O > L 13942296513 u163 1-45 http://www.xiaoyu163.com...

  • Page 46: Kd-Sx985

    KD-SX985 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200206 (No.49731) http://www.xiaoyu163.com...

  • Page 47: Table Of Contents

    KD-SX985 3 7 63 1515 0 SCHEMATIC DIAGRAMS CD RECEIVER KD-SX985 CD-ROM No.SML200206 SOUND SOURCE L 13942296513 Area Suffix Other Areas Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5,6 u163 No.49731 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

  • Page 48: Tel 13942296513

    http://www.xiaoyu163.com 3 7 63 1515 0 < M E M O > L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 49: Block Diagram

    KD-SX985 3 7 6 3 1 5 1 5 0 Block diagram CD Mechanism ENC 1,2 CD PICKUP UNIT MECHA. SWITCH VOLUME JOG SYSTEM EN601 SW1~ 3 CONTROLLER IC701 REMOCON SPINDLE/FEED /LOADING MOTOR REMOTE CONTROL PLL CE VOL CL...

  • Page 50: Standard Schematic Diagrams

    KD-SX985 KD-SX985 3 7 6 3 1 5 1 5 0 Standard schematic diagrams D243 1SS133 Main amp section R244 C243 R243 0.047 IC301 LA47503 180k R245 C241 1/50 R242 R241 C242 22/16 Q241 2SD601A( R) QAU0258-001 QNB0100-002 R177...
  • Page 51 KD-SX985 3 7 6 3 1 5 1 5 0 RWSEL CD servo control section R585 C589 C587 4.7/35 C585 120P R613 R581 C611 R583 R611 R610 CD.L-CH 4.7/35 R614 R612 C610 C586 R582 C588 R584 CD.R-CH 120P C590 4.7/35...
  • Page 52 KD-SX985 KD-SX985 3 7 6 3 1 5 1 5 0 LCD & Key control section LCD1 1 3 9 4 2 2 9 6 5 1 3 IC602 RPM6938-SV4 ACC5V CN601 R660 QNZ0006-001 LCD1 REMOCON QLD0217-001 EN601 R661...

  • Page 53: Printed Circuit Boards

    KD-SX985 3 7 6 3 1 5 1 5 0 Printed circuit boards Main board (Forward side) Main board (Reverse side) Q976 C891 J801 Q977 C910 C910 D971 J321 D972 R902 R903 IC901 J321 R976 C321 IC901 C726 R977...
  • Page 54 http://www.xiaoyu163.com KD-S985 KD-S985 3 7 6 3 1 5 1 5 0 Front board (Forward side) Front board (Reverse side) MARK LCD1 S614 D651 IC602 R646 D620 R653 R651 R623 D602 D653 R652 D656 D641 R654 R624 D603 D605 R633 D654 C604 D655...
  • Page 55 http://www.xiaoyu163.com 3 7 63 1515 0 < M E M O > L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 56 KD-SX985 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200206 (No.49731) http://www.xiaoyu163.com...

  • Page 57: Parts List

    KD-SX985 3 7 63 1515 0 PARTS LIST [ KD-SX985 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix L 13942296513 U --------------------- Other Areas - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 5 CD mechanism assembly and parts list (Block No.MB)
  • Page 58 KD-SX985 3 7 63 1515 0 Exploded view of general assembly and parts list Block No. L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 59 KD-SX985 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Q'ty Description Parts number Parts name Area ------------ CD MECHA GE10043-001A TOP CHASSIS GE40135-001A EARTH PLATE GE30568-003A HEAT SINK GE30393-001A BOTTOM COVER INSULATOR FSMA3005-001 SCREW...
  • Page 60 KD-SX985 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area VKW3001-330 COMP.SPRING 1 FOR DETACH BUTTON GE10042-001A REAR COVER FSYH4036-078 SHEET 1 REAR COVER VKZ4777-001 MINI SCREW 3 FRONT+REAR...
  • Page 61 KD-SX985 3 7 63 1515 0 CD mechanism assembly and parts list Block No. TN-2001-1003 Grease TNG-87 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 62 KD-SX985 3 7 63 1515 0 Parts list (CD mechanism) Block No. MBMM Item Q'ty Description Parts number Parts name Area 30320101T FRAME 30320102T TOP COVER 30320109T DAMPER F 30320110T DAMPER R 303205501T CHASSIS RIVET A CHANGE P.RVT A...
  • Page 63 KD-SX985 3 7 63 1515 0 Parts list (CD mechanism) Block No. MBMM Item Parts number Parts name Q'ty Description Area 30321103T LOADING GEAR 3 30321104T LOADING GEAR 4 30321105T LOADING GEAR 5 LOADING GEAR 6 30321106T LOADING GEAR 7...
  • Page 64 KD-SX985 3 7 63 1515 0 Block No. 01 Electrical parts list (Main board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area BZ841 QAN0002-001Z BUZZER C 262 QERF1CM-106Z E CAPACITOR 10MF 20% 16V...
  • Page 65 KD-SX985 3 7 63 1515 0 Block No. 01 Electrical parts list (Main board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 722 NCB31HK-103X C CAPACITOR D 709 UDZS5.6B-X Z DIODE C 724...
  • Page 66 KD-SX985 3 7 63 1515 0 Block No. 01 Electrical parts list (Main board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area Q 977 2SA1037AK/RS/-X TRANSISTOR R 311 NRSA63J-823X MG RESISTOR NRS181J-120X MG RESISTOR...
  • Page 67 KD-SX985 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Remarks Parts number Parts name Area R 748 NRSA63J-472X MG RESISTOR R 749 NRSA63J-472X MG RESISTOR R 750 NRSA63J-103X MG RESISTOR R 751 NRSA63J-103X...
  • Page 68 KD-SX985 3 7 63 1515 0 Block No. 02 Electrical parts list (Mecha coutrol board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 501 NCB31AK-474X C CAPACITOR C 627 NCB31HK-103X C CAPACITOR...
  • Page 69 KD-SX985 3 7 63 1515 0 Block No. 02 Electrical parts list (Mecha coutrol board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area IC504 NJU7241F33-X R 542 NRSA63J-101X MG RESISTOR IC571 PCM1716E-X R 543...
  • Page 70 KD-SX985 3 7 63 1515 0 Electrical parts list (Mecha coutrol board) Block No. 02 Item Parts number Parts name Remarks Area R 626 NRSA63J-474X MG RESISTOR R 627 NRSA63J-103X MG RESISTOR R 628 NRSA63J-225X MG RESISTOR R 629...
  • Page 71 KD-SX985 3 7 63 1515 0 Block No. 03 Electrical parts list (Front board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 601 NBE20JM-475X TS E CAPACITOR R 623 NRSA02J-182X MG RESISTOR...
  • Page 72 KD-SX985 3 7 63 1515 0 Packing materials and accessories parts list Block No. Block No. A1~A3 L 13942296513 KIT:A4~A8 u163 3-16 http://www.xiaoyu163.com...
  • Page 73 KD-SX985 3 7 63 1515 0 Parts list (Packing) Block No. M3MM Item Description Parts number Parts name Q'ty Area FSPG4002-001 POLY BAG 1 FOR INST BOOK QPA00801205 POLY BAG 1 FOR SCREW KIT FSYH4036-068 SHEET 1 MIRAMA SHEET...

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