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JVC TH-C3 Service Manual

Jvc th-c3 dvd digital theater system service manual
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SERVICE MANUAL
DVD DIGITAL THEATER SYSTEM
4
2005
MB358
(SP-THC3C)
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
TH-C3
(SP-THC3F)
(XV-THC3)

TABLE OF CONTENTS

COPYRIGHT © 2005 Victor Company of Japan, Limited
(SP-THC3S)
(SP-PWC3)
TH-C3
Area suffix
J ---------------------------- U.S.A.
C ------------------------- Canada
No.MB358
2005/4

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Summary of Contents for JVC TH-C3

  • Page 1: Table Of Contents

    SERVICE MANUAL DVD DIGITAL THEATER SYSTEM MB358 2005 TH-C3 TH-C3 Area suffix J ---------------------------- U.S.A. C ------------------------- Canada (SP-THC3C) (SP-THC3F) (SP-THC3S) (SP-PWC3) (XV-THC3) TABLE OF CONTENTS PRECAUTION............... . . 1-4 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Center unit (XV-THC3) Audio section Total Harmonic Distortion 0.02%*1 Digital input*2 DIGITAL IN (DBS)(OPTICAL):-21 dBm to -15 dBm(660 nm ± 30 nm) Video section Video System NTSC Horizontal Resolution 500 lines Signal-to-Noise Ratio 64 dB Video output level Composite:1.0 V(p-p)/75 S-video-Y:1.0 V(p-p)/75 S-video-C:0.286 V(p-p)/75 Component-Y:1.0 V(p-p)/75...
  • Page 3 Satellite Speakers (SP-XTHC3) Front speakers (SP-THC3F) Speaker unit 8.0 cm (3-3/16 inches) 1.5 cm (5/8 inches) Bass-reflex, Magnetically Shielded Power Handling Capacity 140 W Impedance Frequency Range 80 Hz to 20 kHz Dimensions (W 104.5 mm 139 mm 101 mm (4-1/8 inches 5-1/2 inches 4 inches)

  • Page 4: Precaution

    SECTION 1 PRECAUTION Safety Precautions (1) This design of this product contains special hardware and voltmeter. many circuits and components specially for safety purpos- Move the resistor connection to each exposed metal es. For continued protection, no changes should be made part, particularly any exposed metal part having a return to the original design unless authorized in writing by the path to the chassis, and measure the AC voltage across...
  • Page 5 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. 1.5.1 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 6 Importance administering point on the safety Power supply board (Center unit) Mother board (Subwoofer) Caution: For continued protection against risk of fire, replace only with same type 1.6 A/125 V for F901, 8A/125V for F101,10 A/125 V for F153 and F154. This symbol specifies the type of fast operating fuse.

  • Page 7: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB358)1-7...

  • Page 8: Disassembly

    SECTION 3 DISASSEMBLY Main body section 3.1.1 Removing the metal cover (See Figs. 1 to 4) (1) From the both sides of the main body, remove the four screws A attaching the metal cover. (See Figs. 1 and 2.) Metal cover (2) From the back side of the main body, remove the three screws B attaching the metal cover.
  • Page 9 3.1.2 Removing the front panel assembly (See Figs. 5 and 6) • Prior to performing the following procedures, remove the metal cover. CN457 CN456 Main board (1) From the top side of the main body, disconnect the parallel wires from the connectors (CN456, CN457) on the main board.
  • Page 10 3.1.3 Removing the DVD changer mechanism assembly (See Fig. 7) • Prior to performing the following procedures, remove metal cover and front panel assembly. DVD changer mechanism assembly (1) From the top side of the main body, remove the screw E at- CN402 CN401 CN403 taching the wire protection board to the main board.
  • Page 11 3.1.5 Removing the audio & digital input board (See Figs. 9 and 10) • Prior to performing the following procedures, remove the metal cover. Main board CN412 Power supply board (1) From the top side of the main body, disconnect the card wires from the connectors (CN411, CN412) on the main Card wires CN411...
  • Page 12 3.1.8 Removing the main board (See Fig. 11) • Prior to performing the following procedures, remove the metal cover, rear panel, audio & digital input board and tuner. Wire protection board CN460 CN456 (1) From the top side of the main body, remove the screw Q CN457 CN401 CN402...
  • Page 13 Front panel assembly section • Prior to performing the following procedures, remove the front panel assembly from the main body. (See "Removing the front panel assembly") 3.2.1 Removing the phone jack board (See Fig. 1) (1) From the inside of the front panel assembly, remove the screw A attaching the phone jack board.
  • Page 14 3.2.5 Removing the front board (See Figs. 3 and 4) • Prior to performing the following procedures, remove the phone jack board, bracket board and operation board. Front panel assembly (1) From the front side of the front panel assembly, pull out the volume knob in the direction of the arrow.
  • Page 15 DVD changer mechanism assembly section Remove the DVD changer mechanism assembly from the main body. (See "Removing the DVD changer mechanism assembly".) 3.3.1 Removing the tray assemblies (See Figs.1 to 5) (1) From the top side of the main body, remove the two screws Top cover A from the top cover and release the two joints a on the both sides of the DVD changer mechanism assembly.
  • Page 16 Open det. lever Fig.3 Side(R) assembly Tray assemblies Fig.4 Tray assembly Fig.5 1-16 (No.MB358)
  • Page 17 3.3.2 Removing the DVD servo board (See Figs.6 to 8) Caution: Solder the short land sections d on the DVD pickup before dis- connecting the card wire extending from the DVD pickup. If you do not follow this instruction, the DVD pickup may be dam- DVD pickup aged.
  • Page 18 3.3.4 Removing the motor board (See Figs.9 and 10) (1) From the top side of the DVD changer mechanism assem- bly, remove the two belts from the motor pulleys. (See Fig.9.) Note: Take care not to attach grease on the belt. Belt Belt (2) Remove the two screws D attaching the motors to the load-...
  • Page 19 3.3.6 Removing the DVD traverse mechanism assembly (See Fig.11) • Remove the tray assemblies and DVD servo board. DVD changer mechanism assembly (1) From the bottom side of the DVD changer mechanism as- sembly, remove the three screws F attaching the DVD traverse mechanism assembly.
  • Page 20 3.3.7 Removing the DVD pickup (See Figs.12 to 14) • Remove the tray assemblies, DVD servo board and DVD DVD traverse mechanism assembly traverse mechanism assembly. Feed bracket (1) From the top side of the DVD traverse mechanism assem- Thrust spring bly, release the lock of the connector on the DVD pickup Connector and disconnect the card wire in the direction of the arrow.
  • Page 21 DVD pickup Rack arm Guide shaft Rack arm spring Fig.14 Tray assembly Fig.15 (No.MB358)1-21...
  • Page 22 3.3.9 Removing the spindle motor board (See Figs.16 and 17) • Remove the tray assemblies, DVD servo board and DVD DVD traverse mechanism assembly traverse mechanism assembly. (1) From the top side of the DVD traverse mechanism assem- Spindle motor board bly, remove the wires from the soldered sections r on the spindle motor board.
  • Page 23 3.3.10 Removing the feed motor (See Figs.18 and 19) • Remove the tray assemblies and DVD traverse mechanism Feed bracket assembly. (1) From the top side of the DVD traverse mechanism assem- Thrust spring bly, remove the screw K attaching the feed bracket and re- move the feed bracket from the sections t.
  • Page 24 3.3.11 Removing the side (L) and tray switch board (See Figs.20 to 22) • Remove the tray assemblies. SIde(L) (1) From the topside of the DVD changer mechanism assem- bly, remove the two screws M attaching the side (L). (See Fig.20.) (2) From the left side of the DVD changer mechanism assem- bly, disconnect the connector...
  • Page 25 3.3.12 Removing the side (R) assembly (See Fig.23 to 27) • Remove the tray assemblies and DVD servo board. Elevator spring (1) From the inside of the side (R) assembly, release the two tabs aa of the gear cover and remove the gear cover out- ward.
  • Page 26 3.3.13 Removing the lifter assembly (See Figs.28 to 32) • Remove the tray assemblies, DVD servo board, side (L) and Hook side (R) assembly. (1) (1) From the top side of the DVD changer mechanism as- sembly, turn the gear 1 clockwise to move the lifter assem- bly upward.
  • Page 27 3.3.14 Removing the sensor board and SV resistor (See Fig.33) • Remove the tray assemblies, side (L), side (R) assembly and Sensor board lifter assembly. (1) Remove the solders from the soldered sections aj on the sensor board and remove the wires. (2) Remove the two screws Q and take out the sensor board with the SV resistor.
  • Page 28 3.3.15 Taking out the disc in the play mode (See Fig.34 to 37) Reference: Tray assembly Refer to "3.3.1 Removing the tray assemblies". (1) From the top side of the DVD changer mechanism assem- bly, remove the top cover. (2) Unlock the tray assemblies and draw out the tray assem- blies toward the front.
  • Page 29 Tray stopper Main tray Sub tray Fig.36 Tray stopper Fig.37 (No.MB358)1-29...

  • Page 30: Adjustment

    SECTION 4 ADJUSTMENT Special mode 4.1.1 Outline The contents in the special mode of operation, and the definition of a key (remote controller or main unit) 4.1.2 Special mode 1.DVD TEST MODE It goes into the TEST mode of DVD. DVD TEST mode is canceled by except DVD source, and POWER OFF.
  • Page 31 5.FORCED NTSC MODE It is made compulsive NTSC mode. From this, with regards to the input of NTSEL_SW, there is nothing only at the time of 1st power on, and it performs NTSC starting. (Command specification is performed to a module.) A mode clearance is performed by power off.
  • Page 32 DVD TEST MODE Refer to "4.2.2 Indication of FL display in the DVD test mode" as required Insert the power cord in an outlet while pressing the "POWER" and "PLAY" keys on the main unit simultaneously. It is made POWER ON in test mode, and VERSION is displayed on FL. FL indication TEST bb# TEST bb#...
  • Page 33 Press the "MENU" key on the remote controller. Enter to CHECK MODE FL indication FL indication Press the "1" key on the remote controller. CHECK CHECK Starting of DISC & normal play (Play from the started position) FL indication Press the "2" key on the remote controller. Existence of WOBBLE 0 : WOBBLE_NO_CHECK (Un-checking.) 1 : WOBBLE_PRESS_MEDIA (Press)
  • Page 34 FL indication Press the "0" key on the remote controller. MONITOR output change 1 : SRV_MONI_CIRC 2 : SRV_MONI_SERVO 3-5 : SRV_MONI_ANALOG 6-7 : SRV_MONI_DRC 8-11 : SRV_MONI_SERVO_JIG 12 : SRV_MONI_DEFAULT FL indication Press the "+10" key on the remote controller. Initialization of the contents of a backup memory Press the "STOP"...

  • Page 35: Troubleshooting

    SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.MB358)1-35...
  • Page 36 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB358) Printed in Japan...

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