JVC KD-LH915 Service Manual
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JVC KD-LH915 Service Manual

JVC KD-LH915 Service Manual

Cd/sd receiver
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3 7 63 1515 0
SERVICE MANUAL
3
2005
MA156
TE
L 13942296513
1
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
www
.
http://www.xiaoyu163.com
CD/SD RECEIVER
KD-LH915

TABLE OF CONTENTS

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COPYRIGHT © 2005 Victor Company of Japan, Limited
http://www.xiaoyu163.com
2 9
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3
6 7
1 3
1 5
co
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9 4
2 8
KD-LH915
Area suffix
UT -------------------------- Taiwan
UH ------------------------ Thailand
UN ---------------------- Indonesia
U --------------------- Other Areas
0 5
8
2 9
9 4
2 8
m
No.MA156
9 9
9 9
2005/3

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  • Page 1: Table Of Contents

    3 7 63 1515 0 SERVICE MANUAL CD/SD RECEIVER MA156 2005 KD-LH915 KD-LH915 Area suffix UT -------------------------- Taiwan UH ------------------------ Thailand UN ---------------------- Indonesia U --------------------- Other Areas L 13942296513 TABLE OF CONTENTS PRECAUTIONS ............... 1-3 SPECIFIC SERVICE INSTRUCTIONS .

  • Page 2: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com 3 7 63 1515 0 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.

  • Page 3: Precautions

    http://www.xiaoyu163.com SECTION 1 3 7 63 1515 0 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: Disassembly 2

    http://www.xiaoyu163.com Preventing static electricity 3 7 63 1515 0 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 http://www.xiaoyu163.com Important for laser products 3 7 63 1515 0 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.

  • Page 6: Specific Service Instructions

    http://www.xiaoyu163.com SECTION 2 3 7 63 1515 0 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. L 13942296513 u163 1-6 (No.MA156) http://www.xiaoyu163.com...

  • Page 7: Disassembly

    http://www.xiaoyu163.com SECTION 3 3 7 63 1515 0 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...
  • Page 8 http://www.xiaoyu163.com 3.1.3 Removing the top chassis assembly 3 7 63 1515 0 (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. (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 http://www.xiaoyu163.com 3.1.4 Removing the front chassis 3 7 63 1515 0 (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 F attaching the front chassis.
  • Page 10 http://www.xiaoyu163.com 3.1.6 Removing the main board 3 7 63 1515 0 (See Figs.10 and 11) • Prior to performing the following procedures, remove the front panel assembly, heat sink and top chassis assembly. Rear bracket (1) From the back side of the bottom chassis assembly, re- move the two screws H attaching the rear bracket to the bottom chassis assembly.
  • Page 11 http://www.xiaoyu163.com 3.1.7 Removing the rear bracket 3 7 63 1515 0 (See Fig.12) • Prior to performing the following procedures, remove the front panel assembly, heat sink, top chassis assembly and main Main board Wire holder board. Wire (1) From the back side of the main board, remove the wires from the rear bracket in the direction of the arrow.
  • Page 12 http://www.xiaoyu163.com 3.1.9 Removing the switch board 3 7 63 1515 0 (See Figs.14 to 16) • Prior to performing the following procedures, remove the front panel assembly. (1) From the back side of the front panel assembly, remove the Rear cover four screws Q attaching the rear cover assembly to the front panel assembly.
  • Page 13 http://www.xiaoyu163.com CD mechanism assembly section 3 7 63 1515 0 • Remove the CD mechanism assembly from the main body. (See "3.1.5 Removing the CD mechanism assembly".) 3.2.1 Removing the mechanism control board (See Fig.1) (1) From the bottom side of the CD mechanism assembly, sol- der the short sections on the flexible wire.
  • Page 14 http://www.xiaoyu163.com 3.2.2 Removing the top cover 3 7 63 1515 0 (See Fig.2) (1) From the back side of the CD mechanism assembly, re- move the two screws B attaching the top cover. (2) Take out the top cover in an upward direction. Reference: When attaching the top cover, set the sections c of the top cov- er under the bending sections d of the chassis base.
  • Page 15 http://www.xiaoyu163.com 3.2.4 Removing the clamper unit 3 7 63 1515 0 (See Figs.5 and 6) • Remove the mechanism control board, top cover and mecha- nism section. Clamper unit (1) From the bottom side of the mechanism section, remove the clamper 2 spring. (See Fig.5) (2) Release section e of the clamper spring from the bending section of the chassis base.
  • Page 16 http://www.xiaoyu163.com 3 7 63 1515 0 Clamper 2 spring Clamper unit Chassis base Clamper unit Fig.7 Clamper spring Fig.9 L 13942296513 Notch Clamper unit Fig.8 u163 1-16 (No.MA156) http://www.xiaoyu163.com...
  • Page 17 http://www.xiaoyu163.com 3.2.6 Removing the front unit 3 7 63 1515 0 (See Figs10 to 12) • Remove the mechanism control board, top cover and mecha- nism section. Flexible wire (1) From the bottom side of the mechanism section, remove the double-stick tape fixing the flexible wire. (See Fig.10.) (2) From the top side of the mechanism section, remove the screw D attaching the front unit.
  • Page 18 http://www.xiaoyu163.com 3.2.7 Removing the loading arm assembly 3 7 63 1515 0 (See Figs.13 and 14) • Remove the mechanism control board, top cover, mechanism section and front unit. Loading arm assembly (1) From top side of the mechanism section, move the loading arm assembly in the direction of the arrow.
  • Page 19 http://www.xiaoyu163.com 3.2.8 Removing the rod (L), rod (R) and roller assembly 3 7 63 1515 0 (See Figs.15 and 16) • Remove the mechanism control board, top cover, mechanism section, front unit and loading arm assembly. Collar Collar (1) From the bottom side of the loading arm assembly, release the rod (L) and (R) from the joints r.
  • Page 20 http://www.xiaoyu163.com 3.2.9 Removing the CD pickup 3 7 63 1515 0 (See Figs.17 to 19) • Remove the mechanism control board. (1) From the bottom side of the CD mechanism assembly, turn CD mechanism assembly the feed gear in the direction of the arrow to move the CD pickup assembly outwards.
  • Page 21 http://www.xiaoyu163.com 3.2.10 Removing the spindle motor 3 7 63 1515 0 (See Fig.20) • Remove the mechanism control board, top cover, mechanism section and clamper unit. T. table assembly (1) From the top side of the mechanism section, remove the T.table assembly and washer from the spindle motor.
  • Page 22 http://www.xiaoyu163.com 3.2.12 Removing the SW board and rest SW board 3 7 63 1515 0 (See Fig.23) • Remove the mechanism control board. (1) From the bottom side of the CD mechanism assembly, re- CD mechanism assembly move the screw L attaching the SW board. (2) Remove the screw M attaching the rest SW board.

  • Page 23: 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 EXTGS004-26P × 1 dummy load,there is a loss of 6dB between SSG output and antenna input.The loss of 6dB need not be considered since...
  • Page 24 http://www.xiaoyu163.com Service mode 3 7 63 1515 0 4.2.1 Service mode setting (1) Push POWER BOTTON (Power ON) (2) Set to service mode By pushing and holding "DISP" button and "VOLUME +" button sequentially. (3) Select the menu with "CURSOR" button, and decide it with "OK" button. (4) When the "BACK"...
  • Page 25 http://www.xiaoyu163.com 3 7 63 1515 0 CD Data Read CD Data Read OK:Read ADJ NOW ADJ NOW The auto adjustment value of survo at now ADJ INT ADJ INT The auto adjustment value of survo at initial OTHERS IOP TEMP TEMP MIX TOTAL Running Mode...
  • Page 26 http://www.xiaoyu163.com 3 7 63 1515 0 CD Error Clear CD ERROR CLEAR CH Error Clear CH ERROR CLEAR Panel Mecha Error Clear PANEL MECHA ERROR CLEAR Picture Clear PICTURE CLEAR ONLY USED WITH RDS MODEL RDS Service Mode VER= PI = SPI = TP/TA= PTY=...

  • Page 27: Troubleshooting

    http://www.xiaoyu163.com SECTION 5 3 7 63 1515 0 TROUBLESHOOTING Feed section Is 5V or 0V at IC601 Is the wiring for IC601 Is 5V present at IC681 Check CD8V. pin 63? pin 63 correct? pin 19? Check the vicinity of IC601.
  • Page 28 http://www.xiaoyu163.com Signal processing section 3 7 63 1515 0 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 10?
  • Page 29 http://www.xiaoyu163.com Maintenance of laser pickup 3 7 63 1515 0 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.
  • Page 30 http://www.xiaoyu163.com 16 PIN CORD DIAGRAM 3 7 63 1515 0 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 L 13942296513 2 VI 10 VI/BK...
  • Page 31 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 (No.MA156)1-31 http://www.xiaoyu163.com...
  • Page 32 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MA156) Printed in Japan http://www.xiaoyu163.com...
  • Page 33 3 7 63 1515 0 SCHEMATIC DIAGRAMS CD/SD RECEIVER KD-LH915 CD-ROM No.SML200503 KD-LH915 Area suffix UT -------------------------- Taiwan UH ------------------------ Thailand UN ---------------------- Indonesia U --------------------- Other Areas L 13942296513 Contents Block diagram Standard schematic diagrams Printed circuit boards...

  • Page 34: Tel 13942296513

    http://www.xiaoyu163.com 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 35: Block Diagram

    C.DET1 SD CARD LOAD&FEED BUSI/O BUSSO MOTOR CH.L SI/SO CH.R BUSINT CD CHANGER CONTROL IC801 BUSCLK JVC BUS LCD & Key control section DISPCK IC405 DISPDA EFD-OUT1 OUT1 IC401 KEYDA, DISPCE DISPCE REMOCON EFD-OUT2 IC951 OUT2 OSC, CS2, RES, WE...

  • Page 36: Standard Schematic Diagrams

    http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Main amplifier section CN141 QGA2006C1-04 J321 QNN0490-001 R331 R332 R142 R321 R322 QAU0403-001 C144 0.47 R351 Q331 R141 R151 R341 KTD1304-X Q321 KTD1304-X C189 C141 C151 10/16 Q341 Q351 0.0047...
  • Page 37 http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 CD servo control section R433 R436 Q430 R435 2SB624/4/-X L430 C603 R415 C417 100/6.3 R439 C604 C415 4.7/25 120p C419 4.7/25 R411 R413 R616 Q601 0.01 2SB1132/QR/-W Q431 CDON UN2211-X C637 0.047 PVREF...
  • Page 38 http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 LCD & Key control section D453 D452 D451 NSCM315C/Z/-W NSCM315C/Z/-W NSCM315C/Z/-W R458 R459 R426 R425 R424 R423 R422 R421 1.5K R460 1.5k KEY0 R461 1.5k C412 4.7/6.3 R462 1.5k C411 4.7/6.3 S407 S406...

  • Page 39: Printed Circuit Boards

    http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Printed circuit boards Main board Forward side Reverse side CN901 C262 B101 C261 C321 C961 R151 C151 CN141 C961 J321 R881 B304 J801 C322 R882 CN901 D851 Q351 Q341 R141 Q331 Q321 B301...
  • Page 40 http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Mecha control board Forward side Reverse side (SW board) (Rest SW board) (Mechanism control board) (Mechanism control board) (Rest SW board) (SW board) R682 R689 IC681 R681 IC655 R570 R665 C601 C687 C693...

  • Page 41: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com 3 7 63 1515 0 Switch board Forward side S412 S405 R403 R424 R404 D400 R402 R430 R425 R431 D401 D404 R401 S413 S406 D409 D407 S401 S408 D414 D402 R426 R414 R421 R410 R419 R432 D406 R427 D411 D410 D405 R420...
  • Page 42 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 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.MA156SCH) http://www.xiaoyu163.com...

  • Page 43: Kd-Lh915

    3 7 63 1515 0 PARTS LIST [ KD-LH915] * All printed circuit boards and its assemblies are not available as service parts. Area suffix UT -----------------------------Taiwan UH -------------------------- Thailand UN ------------------------ Indonesia L 13942296513 U-------------------------Other Areas - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1)
  • Page 44 http://www.xiaoyu163.com 3 7 63 1515 0 Exploded view of general assembly and parts list Block No. only KD-LH915_UT L 13942296513 Switch board 58 52 u163 http://www.xiaoyu163.com...
  • Page 45 http://www.xiaoyu163.com 3 7 63 1515 0 Main board L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 46 http://www.xiaoyu163.com 3 7 63 1515 0 General Assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local  GE20156-001A GEAR BKT UNIT FSYH4036-100 SHEET GE30968-002A LEVER BKT UNIT GE30964-003A LOWER LEVER ASS WDL215025 WASHER (x2) GE10111-001A TOP CHASSIS GE40135-001A EARTH PLATE GE40259-001A...
  • Page 47 http://www.xiaoyu163.com 3 7 63 1515 0 Symbol No. Part No. Part Name Description Local  LV41843-002A LASER CAUTION GE40218-011A SHEET QLD0309-001 LCD MODULE QAL0587-001 FPC CABLE QNZ0664-003 FRONT CONNECTOR QAM0547-001 SUBWOOFER CABEL VYTA500-001 PIN CAP (x2) QMFZ047-150-T FUSE  GE31205-013A REAR BRACKET GE40207-001A POWER IC BKT...
  • Page 48 http://www.xiaoyu163.com 3 7 63 1515 0 CD mechanism assembly and parts list Block No. Grease FMU-JC3-11D = JVS-1003 = MOBIL-1 = JVG-31N = JC-803B 61 38 L 13942296513 11.10mm 0.10mm 82 82 Inside 1.2 0.1mm u163 After set pick up apply grease The parts without symbol number are not service.
  • Page 49 http://www.xiaoyu163.com 3 7 63 1515 0 CD mechanism Block No. [M][B][M][M] Symbol No. Part No. Part Name Description Local  VKZ4539-056 MINI SCREW (x5) LV10857-002A CHASSIS FRAME 2 LV30225-0J6A SPACER (x2) LV35272-001A DAMPER(F) (x2) LV35273-001A DAMPER(R) QYSPSTU2045MA TAP SCREW M2 x 4.5mm(x3) LV43039-001A DAMPER SP.(R) LV43849-001A...
  • Page 50 http://www.xiaoyu163.com 3 7 63 1515 0 Symbol No. Part No. Part Name Description Local  LV43011-001A THRUST SPRING QYSPSFT2040ZA TAP SCREW M2 x 4mm LV21604-004A L.S.HOLDER 1 VKZ4539-056 MINI SCREW (x2) LV34582-002A L.S.HOLDER 2 VKZ4539-056 MINI SCREW (x2) LV34581-002A SUB GUIDE VKZ4539-056 MINI SCREW (x3)

  • Page 51: Electrical Parts List

    http://www.xiaoyu163.com 3 7 63 1515 0 Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1] D853 RB160M-30-X SB DIODE  Symbol No. Part No. Part Name Description Local D854 RB160M-30-X SB DIODE D891 MC2836-X DIODE...
  • Page 52 http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C361 QERF1EM-475Z E CAPACITOR 4.7uF 25V M C997 NDC31HJ-471X C CAPACITOR 470pF 50V J C362 QERF1EM-475Z E CAPACITOR 4.7uF 25V M C998...
  • Page 53 http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R332 NRSA63J-181X MG RESISTOR 180Ω 1/16W J R770 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R333 NRSA63J-222X MG RESISTOR 2.2kΩ...
  • Page 54 http://www.xiaoyu163.com 3 7 63 1515 0 Switch board  Symbol No. Part No. Part Name Description Local Block No. [0][2] C407 NDC31HJ-471X C CAPACITOR 470pF 50V J  Symbol No. Part No. Part Name Description Local C408 NDC31HJ-471X C CAPACITOR 470pF 50V J C409 NCB31EK-473X...
  • Page 55 http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R440 NRSA63J-331X MG RESISTOR 330Ω 1/16W J S404 NSW0206-001X TACT SWITCH R441 NRSA63J-331X MG RESISTOR 330Ω 1/16W J S405 NSW0206-001X TACT SWITCH...
  • Page 56 http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C501 NCB31HK-103X C CAPACITOR 0.01uF 50V K C665 NCB31CK-104X C CAPACITOR 0.1uF 16V K C502 NCB31HK-223X C CAPACITOR 0.022uF 50V K C666...
  • Page 57 http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R534 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R627 NRSA63J-183X MG RESISTOR 18kΩ 1/16W J R535 NRSA63J-101X MG RESISTOR 100Ω...
  • Page 58 http://www.xiaoyu163.com 3 7 63 1515 0 Packing materials and accessories parts list Block No. KD-LH915_U KD-LH915_UN,UH,UT A1 A2 A3 A4 A1 A2 A18 A19 L 13942296513 KD-LH915_U KIT: A5 A6 A7 A8 A9 u163 3-16 http://www.xiaoyu163.com...
  • Page 59 http://www.xiaoyu163.com 3 7 63 1515 0 Packing and Accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local  GET0273-001A INST BOOK ENG THA U,UH GET0273-003A INST BOOK ENG INA GET0273-007A INST BOOK ENG CHI(TAIWAN) GET0273-004A INSTALL MANUAL U,UH GET0273-006A INSTALL MANUAL...

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