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JVC KD-G489UR Service Manual
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JVC KD-G489UR Service Manual

JVC KD-G489UR Service Manual

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SERVICE MANUAL
6 S ERVICE MANUAL
2007
MA340
COPYRIGHT © 2007 Victor Company of Japan, Limited
* Please refer to the mechanism manual (model TN2007-1010 (No.MY005, No.MY005B))
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)
1
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
CD RECEIVER
KD-G489UR

TABLE OF CONTENTS

COPYRIGHT © 2007 Victor Company of Japan, Limited
No.MA340
2007/6

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Summary of Contents for JVC KD-G489UR

  • Page 1: Table Of Contents

    MA340 2007 6 S ERVICE MANUAL KD-G489UR COPYRIGHT © 2007 Victor Company of Japan, Limited * Please refer to the mechanism manual (model TN2007-1010 (No.MY005, No.MY005B)) Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
  • Page 2 SPECIFICATION AUDIO AMPLIFIER SECTION 20 W RMS × 4 Channels at 4 Ω and [< or =] 1% THD+N Power Output 80 dBA (reference: 1 W into 4 Ω) Signal-to-Noise Ratio 4 Ω (4 Ω to 8 Ω allowance) Load Impedance Tone Control Range Bass/ Mid-range/ Treble ±12 dB at 60 Hz/ 1 kHz/ 7.5 kHz...

  • 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 REPRODUCTION AND POSITION OF LABELS and PRINT WARNING LABEL and PRINT (No.MA340)1-5...

  • Page 6: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MA340)

  • Page 7: Disassembly

    SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the Bottom cover (See Fig.1) (1) Disengage the five Hooks a engaged Bottom cover. hook hook hook Fig.1 3.1.2 Removing the Front chassis (See Fig.2, 3) (1) Remove the two screws A attaching the Front chassis. (See Fig.2) (2) Remove the two screws B (both side) attaching the Front chassis.

  • Page 8: See Fig.

    3.1.3 Removing the Heat sink (See Fig.4) (1) Remove the two screws C and one screw D attaching the Heat sink. Fig.4 3.1.4 Removing the Rear bracket (See Fig.5) (1) Remove the one screw E attaching the Antenna jack. (2) Remove the one screw F attaching the LINE OUT jack. (3) Remove the one screw G attaching the CD-CH jack.

  • Page 9: See Fig.

    3.1.6 Removing the CD mechanism assembly (See Fig.7) (1) Remove the three screws N attaching the CD mechanism assembly. Fig.7 3.1.7 Removing the Switch board assembly (See Fig.8) (1) Remove the Volume knob from the Front panel assembly. (2) Remove the six screws P attaching the Rear cover. hook (3) Disengage the nine Hooks c engaged Rear cover.

  • Page 10: Adjustment

    (3) Digital tester (4) Tracking offset meter Dummy load (5) Test Disc JVC: CTS-1000 Exclusive dummy load should be used for AM, and FM. For FM (6) Extension cable for check dummy load, there is a loss of 6dB between SSG output and an- EXTSH002-22P ×...

  • Page 11: Troubleshooting

    SECTION 5 TROUBLESHOOTING 16 PIN CORD DIAGRAM Green Black OR/WH Violet Blue Gray BL/WH Yellow White WH/BK Orange GN/BK VI/BK GY/BK BL/WH OR/WH 7 RD RD 7 16 YL MEMORY YL 4 15 OR/WH 8 BK REMOTE 5 BL/WH 3 GN 11 GN/BK 2 VI 10 VI/BK...

  • Page 12: No.ma340)1

    Victor company of Japan, Limited Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,Gumma-ken, 371-8543,Japan (No.MA340) Printed in Japan...