JVC KD-G815 Service Manual
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JVC KD-G815 Service Manual

JVC KD-G815 Service Manual

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SERVICE MANUAL
3
2005
MA170
1
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
CD RECEIVER
KD-G815
TABLE OF CONTENTS
COPYRIGHT © 2005 Victor Company of Japan, Limited
Area suffix
UT ------------------------- Taiwan
UH ---------------------- Thailand
UN --------------------- Indonesia
U -------------------- Other Areas
No.MA170
2005/3

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Summary of Contents for JVC KD-G815

  • Page 1 SERVICE MANUAL CD RECEIVER MA170 2005 KD-G815 Area suffix UT ------------------------- Taiwan UH ---------------------- Thailand UN --------------------- Indonesia U -------------------- Other Areas TABLE OF CONTENTS PRECAUTIONS ............... 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION AUDIO AMPLIFIER SECTION Maximum Power Output Front 50 W per channel Rear 50 W per channel 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more Continuous Power Output (RMS) Front than 0.8% total harmonic distortion. 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more Rear than 0.8% total harmonic distortion.

  • Page 3: Precautions

    SECTION 1 PRECAUTIONS Safety Precautions 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 4 Preventing 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. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
  • Page 5 Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam. procedures other than those specified here in may result in 3.CAUTION : There are no serviceable parts inside the hazardous radiation exposure.

  • Page 6: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MA170)

  • Page 7: Disassembly

    SECTION 3 DISASSEMBLY Main body section 3.1.1 Removing the front panel assembly (See Fig.1) (1) Push the detach button in the lower right part of the front panel assembly. Front panel assembly (2) Take out the front panel assembly. Detach button Fig.1 3.1.2 Removing the heat sink (See Fig.2)
  • Page 8 3.1.3 Removing the top chassis assembly (See Figs.3 to 6) • Prior to performing the following procedures, remove the heat sink. Bottom chassis assembly Reference: Remove the front panel assembly as required. (Refer to "3.1.1 Removing the front panel assembly") (1) From the bottom side of the main body, remove the two screws C attaching the top chassis assembly to the bottom chassis assembly.
  • Page 9 3.1.4 Removing the front chassis (See Figs.7 and 8) • Prior to performing the following procedure, remove the front panel assembly, heat sink and top chassis assembly. Top chassis assembly (1) From the both sides of the top chassis assembly, remove the two screws E attaching the front chassis.
  • Page 10 3.1.6 Removing the CD mechanism assembly (See Fig.10) • Prior to performing the following procedures, remove the front panel assembly, heat sink and top chassis assembly. Top chassis Reference: Remove the front chassis and mechanism control board as re- quired.(Refer to "3.1.4 Removing the front chassis" and "3.1.5 Removing the mechanism control board") (1) From the inside of the top chassis assembly, remove the three screws G attaching the CD mechanism assembly.
  • Page 11 3.1.8 Removing the rear bracket (See Fig.13) • Prior to performing the following procedures, remove the front panel assembly, heat sink, top chassis assembly and main Main board Wire holder board. (1) From the rear side of the main board, remove the wires Wire from the rear bracket in the direction of the arrow.
  • Page 12 3.1.10 Removing the switch board (See Figs.15 to 17) • Prior to performing the following procedures, remove the front panel assembly. Rear cover assembly (1) From the rear side of the front panel assembly, remove the four screws Q attaching the rear cover assembly to the front panel assembly.
  • Page 13 CD Mechanism section 3.2.1 Removing the top cover (See Figs.1 and 2) (1) Remove the four screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover backward to release the two joints a. Top cover Joints a Fig.1...
  • Page 14 3.2.2 Removing the connector board Wires (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this in- struction may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the short-circuit point on the pickup.
  • Page 15 3.2.3 Removing the DET switch (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2) Unsolder the DET switch wire if necessary. switch Connector board Pickup Fig.6 Tab c DET switch DET switch wire Tab c...
  • Page 16 3.2.4 Removing the chassis unit (See Figs.8 and 9) • Prior to performing the following procedure, remove the top Chassis unit cover and connector board. Suspension spring (L) (1) Remove the two suspension springs (L) and (R) attaching Suspension spring (R) the chassis unit to the frame.
  • Page 17 3.2.5 Removing the clamper assembly (See Figs.10 and 11) • Prior to performing the following procedure, remove the top cover. (1) Remove the clamper arm spring. Clamper arm (2) Move the clamper assembly in the direction of the arrow to spring release the two joints d.
  • Page 18 3.2.6 Removing the loading / feed motor assembly (See Figs.12 and 13) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor as- sembly in the direction of the arrow to remove it from the chassis rivet assembly.
  • Page 19 3.2.7 Removing the pickup unit Pickup unit (See Figs.14 to 18) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw D and pull out the pu. shaft holder from the pu.
  • Page 20 3.2.9 Removing the trigger arm Joint k (See Figs.19 and 20) • Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the direction of the arrow to release Trigger arm the joint k and pull out upward.
  • Page 21 3.2.11 Removing the mode sw. / select lock arm Link plate Joint t (See Figs.22 and 23) Mode sw. • Prior to performing the following procedure, remove the top plate assembly. Select lock arm (1) Bring up the mode sw. to release from the link plate (joint t) and turn in the direction of the arrow to release the joint u.
  • Page 22 3.2.12 Reassembling the mode sw. / select lock arm Select lock arm spring (See Figs.24 to 26) REFERENCE: Hook w Reverse the above removing procedure. (1) Reattach the select lock arm spring to the top plate and set Joint v Joint v the shorter end of the select lock arm spring to the hook w on the top plate.
  • Page 23 3.2.13 Removing the select arm R / link plate Joint c' Link plate Joint r (See Figs.27 and 28) Joint b' • Prior to performing the following procedure, remove the top Select arm R plate assembly. (1) Bring up the select arm R to release from the link plate (joint a') and turn as shown in the figure to release the two Joint b' joints b' and joint c'.
  • Page 24 3.2.15 Removing the loading roller assembly (See Figs.31 to 33) Loading roller assembly • Prior to performing the following procedure, remove the Roller guide clamper assembly and top plate assembly. spring (1) Push inward the loading roller assembly on the gear side and detach it upward from the slot of the joint g' of the lock arm rivet assembly.
  • Page 25 3.2.16 Removing the loading gear 5, 6 and 7 (See Figs.35 and 36) Loading gear bracket • Prior to performing the following procedure, remove the top cover, chassis unit, pickup unit and top plate assembly. Loading gear 6 (1) Remove the screw K attaching the loading gear bracket. The loading gear 6 and 7 come off the loading gear brack- (2) Pull out the loading gear 5.
  • Page 26 3.2.17 Removing the gears Joint p' (See Figs.37 to 40) • Prior to performing the following procedure, remove the top Change plate cover, chassis unit, top plate assembly and pickup unit. rivet assembly • Pull out the loading gear 3. (See Fig.35.) (1) Pull out the feed gear.
  • Page 27 3.2.18 Removing the turn table / spindle motor Turn table (See Figs.41 and 42) • Prior to performing the following procedure, remove the top cover, connector board, chassis unit and clamper assembly. (1) Remove the two screws L attaching the spindle motor as- sembly through the slot of the turn table on top of the body.

  • Page 28: Adjustment

    (3) Digital tester Output Level Line out 5.0V (Vol. MAX) (4) Tracking offset meter (5) Test Disc JVC :CTS-1000 Dummy load (6) Extension cable for check Exclusive dummy load should be used for AM,and FM. For FM EXTSH002-22P × 1...

  • Page 29: Troubleshooting

    SECTION 5 TROUBLESHOOTING Feed section Is 5v or 0V at IC621 Is the wiring for IC621 Is 5V present at IC681 Check CD8V. pin 40? pin 40 correct? pin 6? Check the vicinity of IC621. Is 4V present at both Is 6V or 2V present at Check the feed motor sides of the feed motor?
  • Page 30 Signal processing section Compare the L-ch and Is the sound output from No sound from either R-ch to locate the both channels (L, R)? channel. defective point. Normal Is 9V present at IC161 Is 9V present at IC901 Check IC901 and its pin 40? pin 13? peripheral circuits.
  • Page 31 Maintenance of laser pickup Replacement of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens Turn of the power switch and, disconnect the with a alcohol soaked cotton swab. power cord.
  • Page 32 16 PIN CORD DIAGRAM Black Green OR/WH Violet BL/WH Gray Blue WH White Yellow WH/BK Brown Orange GN/BK VI/BK GY/BK MEMORY 16 YL 8 BK 7 RD 15 OR/WH 13 BR 3 GN 11 GN/BK 2 VI 10 VI/BK 4 WH 12 WH/BK 1 GY 9 GY/BK...
  • Page 33 (No.MA170)1-33...
  • Page 34 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MA170) Printed in Japan...
  • Page 35 SCHEMATIC DIAGRAMS CD RECEIVER KD-G815 CD-ROM No.SML200503 Area suffix UT ------------------------- Taiwan UH ---------------------- Thailand UN --------------------- Indonesia U -------------------- Other Areas Contents Block diagram Standard schematic diagrams 2-5 to 6 Printed circuit boards No.MA170SCH COPYRIGHT 2005 Victor Company of Japan, Limited.

  • Page 36: Safety Precaution

    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 37: Block Diagram

    Block diagram J321 IC573 TU.L FRONT X571 IC361 TU.R LINE OUT FM/AM CLOCK GEN. IC381 VA,VB REAR VOUTL CD.L-CH TUNER VE,VF LINE AMP VOUTR IC572 CD.R-CH MD,LD LINE OUT IC571 IC601 FM/AM OSC VREF RWSEL,IOP CD LPF 24bit DAC FM VT OUT FL FL+, FL- CD RF...
  • Page 38 Standard schematic diagrams Main amplifier section RB160M-30-X R248 R244 D243 C243 IC301 TB2906HQ 0.047 C241 1/50 R245 C242 22/16 QAU0312-002 R311 R362 R361 0.47 C311 QAM0556-001 0.1/50 C362 C370 C312 0.47 0.0015 1/50 R312 1/50 1.8K C163 TU.R IC361 NJM2160BV-X LEVEL 1/50 1.8K...
  • Page 39 CD servo control section R585 C585 C587 C589 R613 R581 R583 C611 CD.L 8.2K 150P 4.7/35 R589 4.7/35 R614 R612 R611 R610 C577 C610 R572 C586 C588 C590 R582 R584 2.2M Q573 2SB624/4/-X CD.R 8.2K 150P 4.7/35 4.7/35 Q571 R586 UN2111-X R601 R602...
  • Page 40 LCD & Key switch section LCD1 QLD0348-001 CN601 NNZ0098-003X LCDDA R676 3.3k LCDCE R677 3.3k LCDCL R678 3.3k KEY1 KEY2 ENC2 JS601 KEY0 QSW0793-001 TEMP R685 ACC5V ENC2 ENC1 R668 R669 R604 R603 R602 R601 R661 ENC1 RESET 1.8k 1.2k R666 COM8 D691...
  • Page 41 Printed circuit boards Main board Forward side Reverse side C901 R272 C901 CN251 L901 R261 C183 R198 C322 CN161 R851 C273 R273 C852 R353 J321 CN901 L901 R323 CN901 J321 CN161 Q331 CN251 C325 C324 C323 C326 R333 C320 C891 C170 R343 Q271...
  • Page 42 Switch board Forward side Reverse side R604 R639 D625 D624 S603 S617 D608 R640 Q644 Q645 SD602 SD601 LCD1 R655 D641 D641 Q646 R622 D601 D620 R665 D618 R628 D655 D642 R627 D642 R674 R630 R632 C603 R629 C604 C608 C605 S605 D643...
  • Page 43 < M E M O >...
  • Page 44 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.MA170SCH)

  • Page 45: Parts List

    PARTS LIST [ KD-G815 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix UT -----------------------------Taiwan UH -------------------------- Thailand UN ----------------------------- Asean U --------------------- Other Areas - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 6 CD mechanism assembly and parts list (Block No.MB)
  • Page 46 Exploded view of general assembly and parts list Block No. CD Mechanism control board Switch board...
  • Page 47 Main board...
  • Page 48 SW PWB SHEET GE31188-005A DETACH BUTTON GE40202-004A COMP.SPRING GE10085-003A REAR COVER GE40211-004A REAR LENS (L) GE40216-004A REAR LENS (R) GE40218-010A SHEET (x2) VKZ4777-010 MINI SCREW (x4) GE40204-001A JVC BADGE GE31201-002A LCD CASE GE31036-001A LCD LENS GE31037-001A LENS CASE GE40200-002A LIGHTING SHEET...
  • Page 49  Symbol No. Part No. Part Name Description Local GE31653-001A NAME PLATE LV41843-002A LASER CAUTION GE40218-011A SHEET QLD0348-001 LCD MODULE QNZ0442-001 LCD CONNECTOR QNZ0442-001 LCD CONNECTOR QUQ105-2207AE FFC WIRE 22pin 7cm VYSH101-009 SPACER QAL0536-001 QNZ0664-003 FRONT CONNECTOR QAM0684-001 SUBWOOFER CABLE VYTA500-001 PIN CAP (x2)
  • Page 50 CD mechanism assembly and parts list Grease Block No. TN-2001-1013 TNG-87 GP-501MK CFD-005Z GP-305T The parts without symbol number are not service.
  • Page 51 CD mechanism Block No. [M][B][M][M] Symbol No. Part No. Part Name Description Local  30320101T FRAME 30320102T TOP COVER 30320115T DANPER F (x2) 30320116T DANPER R 303205505T CHASSIS RIVET 303205503T CHANGE P. RVT A 303205301T CLAMPER ASSY 303205302T SPINDLE MOTOR A 30320502T CLAMPER ARM 30320503T...

  • Page 52: Electrical Parts List

    Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1] D962 RB160M-30-X SB DIODE  Symbol No. Part No. Part Name Description Local D971 RB160M-30-X SB DIODE D972 RB160M-30-X SB DIODE IC31 TB2118F-X PLL IC QERF1CM-226Z E CAPACITOR...
  • Page 53  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C279 QERF1CM-476Z E CAPACITOR 47uF 16V M C912 NCB31HK-103X C CAPACITOR 0.01uF 50V K C301 QFV91HJ-474Z MF CAPACITOR 0.47uF 50V J C914 QERF1CM-107Z E CAPACITOR 100uF 16V M...
  • Page 54  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R278 NRSA63J-105X MG RESISTOR 1MΩ 1/16W J R757 NRSA63J-222X MG RESISTOR 2.2kΩ 1/16W J R279 NRSA63J-473X MG RESISTOR 47kΩ 1/16W J R758 NRSA63J-473X MG RESISTOR 47kΩ...
  • Page 55 Switch board  Symbol No. Part No. Part Name Description Local Block No. [0][2] R633 NRSA02J-561X MG RESISTOR 560Ω 1/10W J  Symbol No. Part No. Part Name Description Local R636 NRSA02J-561X MG RESISTOR 560Ω 1/10W J R638 NRSA02J-561X MG RESISTOR 560Ω...
  • Page 56  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local Q501 UN2111-X TRANSISTOR C628 NEAG0JM-476X E CAPACITOR 47uF 6.3V M Q502 UN2211-X TRANSISTOR C629 NCB31EK-333X C CAPACITOR 0.033uF 25V K Q571 UN2111-X TRANSISTOR C630 NCB31EK-333X...
  • Page 57  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R540 NRSA63J-473X MG RESISTOR 47kΩ 1/16W J R633 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R541 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R634 NRSA63J-0R0X MG RESISTOR 0Ω...
  • Page 58 Packing materials and accessories parts list Block No. A2 A3 A4 A5 A6 KIT : A7 A8 A9 A10 A11 3-14...
  • Page 59 Packing and Accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local  GET0293-002A INST BOOK KOR CHI(TAIWAN) ARA PER G815U GET0293-001A INST BOOK ENG THA G815U,G815UH GET0293-003A INST BOOK ENG INA G815UN GET0293-007A INST BOOK ENG CHI(TAIWAN) G815UT GET0293-009A INST BOOK...

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