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JVC EX-AK2DB Service Manual
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JVC EX-AK2DB Service Manual

JVC EX-AK2DB Service Manual

Compact component system
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SERVICE MANUAL
COMPACT COMPONENT SYSTEM
3 S ERVICE MANUAL
2008
MB658<Rev.001>
COPYRIGHT © 2008 Victor Company of Japan, Limited
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
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
EX-AK2DB

TABLE OF CONTENTS

COPYRIGHT © 2008 Victor Company of Japan, Limited
No.MB658<Rev.001>
2008/3

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Summary of Contents for JVC EX-AK2DB

  • Page 1: Table Of Contents

    MB658<Rev.001> 2008 3 S ERVICE MANUAL EX-AK2DB COPYRIGHT © 2008 Victor Company of Japan, Limited 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) TABLE OF CONTENTS PRECAUTION.
  • Page 2 SPECIFICATION EX-AK2DB General Power source AC 230 V , 50 Hz Power consumption 24 W (in operation) 0.9 W (on standby) Mass 3.1kg External dimensions ( W × H × D) 232 mm × 100 mm × 269 mm DVD player...

  • Page 3: Precaution

    SECTION 1 PRECAUTION 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 laser products.

  • Page 5: No.mb658

    Important for laser products 1.CLASS 1 LASER PRODUCT 5.CAUTION : If safety switches malfunction, the laser is able to function. 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation 6.CAUTION : Use of controls, adjustments or performance of when open.

  • Page 6: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the Top cover (See Fig 1, 2) (1) Remove the four screws A attaching the Top cover. (See Fig.1) (2) Takeout two washers B and two washers C on the Top cov- er.
  • Page 7 3.1.2 Removing the AL panel L and AL panel R (See Fig.3 to 5) (1) Remove the two screws D and two screws E attaching the Bridge A. (See Fig.3) (2) Remove the two screws F attaching the Bridge B. (See Fig.3) (3) Remove the two screws G and three screws H attaching the bridge C.
  • Page 8 3.1.3 Removing the Front panel (See Fig.6, 7) (1) Remove the two screws M attaching the Foot. (See Fig.6) (2) Remove the three screws N attaching the Foot. (See Fig.6) (3) Disengage two hooks a engaged both side of the Front panel.
  • Page 9 3.1.5 Removing the Switching power supply unit (see Fig.10) (1) Disconnect the connector wire from Switching power sup- ply unit connected to connector CN201 of the Main board. (2) Remove the one screw Q attaching the Switching power supply unit. CN201 Fig.10 3.1.6 Removing the Headphone board (See Fig.11)

  • Page 10: No.mb658)1

    3.1.7 Removing the Main board (See Fig.12 to 14) (1) Disconnect the card wire from Micon board connected to CN714 connector CN202 of the Main board. (See Fig.12) (2) Disconnect the card wire from DVD mechanism connected to connector CN206 of the Main board.
  • Page 11 3.1.8 Removing the Micon board (See Fig.15) CN701 (1) Disconnect the connector wire from Micon board connect- ed to connector CN101 of the Digital amp board. (2) Disconnect the card wire from SCART board connected to connector CN711 of the Micon board. (3) Disconnect the card wire from Loader board connected to connector CN701...
  • Page 12 3.1.10 Removing the DVD mechanism (See Fig.17) (1) Remove the three screws V attaching the DVD mecha- nism. Fig.17 3.1.11 Removing the SCART board (See Fig.18) (1) Remove the one screw W attaching the SCART board. Fig.18 3.1.12 Removing the Speaker terminal board (See Fig.18) Remove the one screw X attaching the Speaker terminal board.
  • Page 13 DVD mechanism 3.2.1 Removing the traverse mechanism (See Fig.1 to 6) (1) Remove the two screws A attaching the tramecha holder from top side of DVD mechanism assembly. (See Fig.1) Clamper base (2) Remove the two screws B attaching the DVD module board.
  • Page 14 DVD module board DVD module board CN101 CN201 Fig.6 Fig.3 DVD mechanism assembly Traverse mechanism assembly Fig.4 Solder short land section Fig.5 1-14 (No.MB658<Rev.001>)
  • Page 15 3.2.2 Removing the pickup assembly (See Fig.7 to 11) (1) Remove the two rod springs pressing the guide shaft. (See (SHAFT) Fig.7) (2) Remove the screw E and F attaching the spring holder. (See Fig.8) (T.TABLE) (3) Remove the read screw from traverse mechanism assem- bly.
  • Page 16 3.2.3 Removing the feed motor assembly (See Fig.12) (1) Remove the one screw G attaching the feed motor assem- Solder part bly. (2) Remove the feed motor wires from solder part of spindle motor board. Middle gear Lead screw Fig.12 3.2.4 Removing the spindle motor assembly (See Fig.13) (1) Remove the three screws H attaching the spindle motor...
  • Page 17 3.2.5 Removing the tray assembly (See Fig.14 & 15) (1) Remove the two screws J attaching the clamper base. (See Fig.14) (2) Remove the one screw K attaching the shaft guide from bottom side. (See Fig.14) (3) Remove the two screws L attaching the shaft guide from top side.

  • Page 18: Adjustment

    SECTION 4 ADJUSTMENT ATTENTION IN SERVICE OF DVD SECTION (1) When pickup, Flash ROM ,DVD module board were changed, initialize EEPROM by all means. (2) When full initialization was executed, execute learning with a DVD test disc by all means. Test disc : VT-501, VT-502 Learning method : It is adjusted automatically by normal playback of a DVD disc.
  • Page 19 STEP Operation Movement FL(LCD)indication Remarks Learning status (first digit) BCA CHECK OK incomplete, DVD learning incomplete, CD learning incomplete (indication 7) BCA CHECK OK incomplete, DVD learning complete, CD learning incomplete (indication 6) BCA CHECK OK incomplete, DVD learning incomplete, CD learning complete (indication 5) BCA CHECK OK incomplete,...
  • Page 20 STEP Operation Movement FL(LCD)indication Remarks C H E C Press a [1] key of the Disc startup and through remote controller playback (Playback starts from the start position) Press a [2] key of the Presence of WOBBLE Upper : 0 remote controller 0:WOBBLE_NO_CHECK Lower : WOBBLE detection result...
  • Page 21 STEP Operation Movement FL(LCD)indication Remarks C H E C K Press a [STOP] key of Disc stop, LD-OFF the main body or remote controller C H E C K Press a [OPEN/CLOSE] Tray Open/Close key of the main body or remote controller Press a [PLAY] key of Disc playback...
  • Page 22 TEST MODE 4.3.1 Mode transition It shall be in the mode in normal POWER ON and prepare five modes. (1) The test mode which enters by the receive of remote controller cord [STOP] + [POWER] + [1]. * It invalidate the whole test mode anything other than test remote controller cord [STOP] + [POWER] + [1]. (2) The version confirmation mode which enters by the receive of remote controller cord [STOP] + [POWER] + [10].

  • Page 23: Troubleshooting

    4.3.2 Set to DAB Test mode (1) Source to DAB. (2) Press [STOP] + [POWER] + [10] key together. (3) Press [STOP] + [10], keep this state version indication is replaced whenever press [POWER] key. Mode change to version confirmation mode 5 "DAB module version", press [UPPER] key of remote controller to shift the DAB test mode. SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING.
  • Page 24 Victor Company of Japan, Limited Audio/Video Systems category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB658<Rev.001>) Printed in Japan...