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JVC KD-G401 Service Manual

Cd receiver
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SERVICE MANUAL
1
2004
MA051
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
CD RECEIVER
KD-G401
TABLE OF CONTENTS
Area suffix
E ----------- Continental Europe
EX --------------- Central Europe
No.MA051
2004/1
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Summary of Contents for JVC KD-G401

  • Page 1 SERVICE MANUAL CD RECEIVER MA051 2004 KD-G401 Area suffix E ----------- Continental Europe EX --------------- Central Europe TABLE OF CONTENTS PRECAUTION............... . . 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 than Continuous Power Output Front (RMS) 0.8% total harmonic distortion. 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than Rear 0.8% total harmonic distortion.
  • Page 3 SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the front panel assembly (See Fig.1) (1) Push the detach button in the lower right part of the front Front panel assembly panel assembly and remove the front panel assembly. Detach button Fig.1 3.1.2 Removing the bottom cover (See Fig.2) (1) Turn the main body up side down.
  • Page 4 3.1.4 Removing the side panel (See Fig.4) • Prior to performing the following procedure, remove the front panel assembly as required. (1) Remove the screw B and two screws C attaching the side panel on the left side of the main body, and remove the side panel.
  • Page 5 3.1.7 Removing the CD mechanism assembly (See Fig. 7) • Prior to performing the following procedure, remove the front panel assembly, bottom cover, side panel, rear bracket and main board. • Remove the front chassis assembly as required. (1) Remove the three screws H attaching the CD mechanism assembly on the top chassis.
  • Page 6 CD Mechanism Assembly 3.2.1 Removing the top cover (See Figs.1 and 2) (1) Remove the two 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 7 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 connector board.
  • Page 8 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. DET switch Connector board Pickup Fig.6 Tab c DET switch DET switch wire Tab c...
  • Page 9 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) Suspension spring (R) (1) Remove the two suspension springs (L) and (R) attaching the chassis unit to the frame.
  • Page 10 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 spring (2) Move the clamper assembly in the direction of the arrow to release the two joints d.
  • Page 11 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 assembly in the direction of the arrow to remove it from the chassis rivet assembly.
  • Page 12 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 Part e the pu.
  • Page 13 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 14 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 15 3.2.12 Reassembling the mode sw. / select lock arm Select lock arm spring (See Figs.24 to 26) Hook w REFERENCE: Reverse the above removing procedure. Joint v (1) Reattach the select lock arm spring to the top plate and set Joint v the shorter end of the select lock arm spring to the hook w on the top plate.
  • Page 16 3.2.13 Removing the select arm R / link plate Link plate Joint r Joint c' (See Figs.27 and 28) Select arm R Joint b' • Prior to performing the following procedure, remove the top 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 17 3.2.15 Removing the loading roller assembly Loading roller assembly (See Figs.31 to 33) • 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 18 3.2.16 Removing the loading gear 5, 6 and 7 Loading gear bracket (See Figs.35 and 36) • Prior to performing the following procedure, remove the top Loading gear 6 cover, chassis unit, pickup unit and top plate assembly. (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 19 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 20 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 21 Exclusive dummy load should be used for AM,and FM. For FM (7) Tracking offset meter dummy load,there is a loss of 6dB between SSG output and (8) Test Disc JVC :CTS-1000 antenna input.The loss of 6dB need not be considered since (9) Extension cable for check direct reading of figures are applied in this working standard.

  • Page 22: Troubleshooting

    SECTION 5 TROUBLESHOOTING Feed section Is 5v or 0V at IC541 Is the wiring for IC541 Is 5V present at IC501 Check 8V. pin 40? pin 40 correct? pin 20? Check the vicinity of IC541. Is 4V present at both Is 6V or 2V present at Check the feed motor sides of the feed motor?
  • Page 23 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 31? pin 10? peripheral circuits.
  • Page 24 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 25 16 pin cord diagram Black Green VI/BK Violet GY/BK Blue Gray WH/BK BL/WH White Yellow GN/BK Brown VI/BK GY/BK WH/BK GN/BK MEMORY MEMORY BACKUP DIRECT TO BATTERY +12Volt BL/WH REMOTE ACC + 12Volt GROUND Rear Right Auto Antenna Front Right Line Front Left...

  • Page 26: Schematic Diagrams

    SCHEMATIC DIAGRAMS CD RECEIVER KD-G401 CD-ROM No.SML200401 Area suffix E ----------- Continental Europe EX --------------- Central Europe Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5 to 7 No.MA051SCH COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LTD. 2004/1...

  • Page 27: Block Diagram

    Block diagram Main amplifier & CD servo control section FM/AM LEFT.REAR TUNER RIGHT.REAR CJ321 FM/AM,SEEK/STOP,SD/ST LINE OUT SQ ,MONO,SM,AFCK RDSDA IC71 SW1,SW2,PSW RDSCL DETECTOR POSITION SET SPINDLE+ LM0,LM1,RST SWITCH TU.L LEFT.FRONT SPINDLE- VREF TU.R DMO,FMO RIGHT.FRONT FEED+ FEED+ LEFT.REAR LOAD&FEED FEED- TRO,FOO VOLDA...

  • Page 28: Standard Schematic Diagrams

    Standard schematic diagrams D243 Main amplifier section RB160M-30-X R248 R244 C243 R243 0.047 180k R245 C241 1/50 R242 R241 IC301 C242 22/16 LA47515 Q241 QAU0313-001 2SD601A/R/-X LEVEL R793 R161 D240 C312 220k 1SS355-X 4.7u 0.47 R312 1/50 8.2k R311 C311 R171 1SS355-X 0.47...
  • Page 29 CD servo control section R504 R502 8.2k C508 R586 6.8k R503 4.7k 0.01 R581 8.2k R585 CD.R C582 47/10 R517 C511 R584 270P R506 8.2k C501 C581 Q501 8.2k 3300P C580 4.7/25 AOUTR- R582 8.2k C589 4.7/25 AOUTR+ R583 8.2k IC581 NJM4565M-WE R593...
  • Page 30 LCD & Key control section JS686 IC681 QSW0863-003 RPM7338-V4 C682 0.012 R687 C681 4.7/6.3 R688 C687 0.022 R681 CJ601 VMC0335-001 LCD1 QLD0299-001 ACC5V REMOCON ENC1 ENC2 DIMOUT LCDCL LCDDA LCDCE KEY0 KEY1 KEY2 R604 R603 R602 R601 R605 R661 KEY2 2.2K 2.7k 1.8k...
  • Page 31 Printed circuit boards Main board (1/2) Forward side C910 IC901 Q341 J321 D331 C914 R331 L901 D901 C913 J801 R892 Q331 D891 D892 C904 C163 CN901 C891 Q891 C902 Q321 Q351 C905 R901 R341 C173 C318 C903 R783 D781 C919 R271 Q781 R261...
  • Page 32 Main board (2/2) Reverse side J321 CN901 C910 D971 J801 D972 IC901 R971 C321 C911 L901 C802 C914 R972 C905 C913 C904 D901 C915 C318 C902 C712 R901 R882 C319 R273 C308 D273 D902 C907 C906 C919 Q251 R272 D784 C315 C912 C259...
  • Page 33 Front board Forward side R626 D651 JS686 D636 S611 D649 R608 R607 R612 D637 R611 D648 R651 R652 S614 LCD1 D647 R605 R603 D645 D638 D639 D644 D646 D641 D642 D640 D643 S605 S604 S608 R610 S603 S602 S601 S607 S613 R601 S612...
  • Page 34 Exploded view of general assmbly and parts list Block No.
  • Page 35 General assembly Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local GE10043-210A TOP CHASSIS GE40135-001A EARTH PLATE GE30938-003A SIDE PANEL GE30393-002A BOTTOM COVER FSMA3004-203 INSULATOR QYSDST2604Z SCREW 2.6mm x 4mm(x3) FSKZ4005-001 SCREW (x2) QYSDST2606Z SCREW 2.6mm x 6mm(x2) QYSDST2604Z SCREW 2.6mm x 4mm(x3)
  • Page 36 CD mechanism assembly and parts list Block No. TN-2001-1011 Grease TNG-87 GP-501MK CFD-005Z GP-501A...
  • Page 37 CD mechanism Block No. [M][B][M][M]  Symbol No. Part No. Part Name Description Local 30320101T FRAME 30320102T TOP COVER 30320115T DANPER F 30320116T DANPER R 303205505T CHASSIS RIVET 303205503T CHANGE P. RVT A 303205301T CLAMPER ASS'Y 303205302T SPINDLE MOTOR A 30320502T CLAMPER ARM 30320503T...

  • Page 38: Electrical Parts List

    Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1][0][0] D784 UDZS11B-X Z DIODE  Symbol No. Part No. Part Name Description Local D891 1SS355-X SI DIODE D892 1SS355-X SI DIODE D901 1N5401-TU-15 DIODE IC31 TB2118F-X...
  • Page 39  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local C192 QEKJ1CM-107Z E CAPACITOR 100uF 16V M C545 NCB31HK-103X C CAPACITOR 0.01uF 50V K C193 QEKJ1CM-107Z E CAPACITOR 100uF 16V M C546 NDC31HJ-470X C CAPACITOR 47pF 50V J...
  • Page 40  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local C915 NCB31CK-104X C CAPACITOR 0.1uF 16V K R405 NRSA63J-222X MG RESISTOR 2.2kΩ 1/16W J C919 QEKJ1CM-106Z E CAPACITOR 10uF 16V M R406 NRSA63J-470X MG RESISTOR 47Ω...

  • Page 41: Front Board

     Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local R586 NRSA63J-682X MG RESISTOR 6.8kΩ 1/16W J QQL244J-4R7Z INDUCTIOR 4.7uH J R587 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J L401 NQL114K-470X INDUCITOR 47uH K R588 NRSA63J-102X MG RESISTOR...
  • Page 42  Symbol No. Part No. Part Name Description Local R603 NRSA63J-122X MG RESISTOR 1.2kΩ 1/16W J R604 NRSA63J-182X MG RESISTOR 1.8kΩ 1/16W J R605 NRSA63J-272X MG RESISTOR 2.7kΩ 1/16W J R606 NRSA63J-821X MG RESISTOR 820Ω 1/16W J R607 NRSA63J-821X MG RESISTOR 820Ω...
  • Page 43 Packing materials and accessories parts list Block No. A2A3A4 A6A7A8A9 KIT:A10 A12 A13 3-12...
  • Page 44 Packing and accessories Block No. [M][3][M][M]  Symbol No. Part No. Part Name Description Local ENG GER FRE GET0195-001A INST SHEET GET0195-002A INST SHEET SPA ITA POL RUS E SWE DAN FIN GET0195-003A INST SHEET GET0195-005A INSTALL MANUAL GET0195-006A INSTALL MANUAL GET0195-007A INSTALL MANUAL LVT1120-002A...

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