JVC TH-M65 Service Manual Download Page 6 | Manualshive

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1-6 (No.MB112)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

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Summary of Contents for TH-M65

Page 1: ...112 2003 12 TH M65 TABLE OF CONTENTS 1 PRECAUTION 1 3 2 SPECIFIC SERVICE INSTRUCTIONS 1 6 3 DISASSEMBLY 1 7 4 ADJUSTMENT 1 35 5 TROUBLESHOOTING 1 40 Area suffix US Singapore UW Brazil Mexico Peru UJ U S Military UG Turkey South Africa Egypt XV THM65 SP PWM65 SP THM65C SP THM65F SP THM65F SP THM65F SP THM65F ...

Page 2: ... to 108 00 MHz AM 531 kHz to 1 602 kHz at 9 kHz intervals 530 kHz to 1 600 kHz at 10 kHz intervals General Power Requirements AC 110 230 V 50 Hz 60 Hz Power Consumption 20 W at operation 1 6 W in standby mode Dimensions W H D 400 mm 85 mm 386 mm Mass 4 6 kg Subwoofer SP PWM65 Amplifier Front Center Surround 80 W per channel RMS at 6 Ω at 1 kHz with 10 total harmonic distortion Subwoofer 120 W RMS ...

Page 3: ...ack control shafts etc to be sure the product is safe to operate without danger of electrical shock Do not use a line isolation transformer during this check Plug the AC line cord directly into the AC outlet Using a Leakage Current Tester measure the leakage current from each exposed metal parts of the cabinet particular ly any exposed metal part having a return path to the chassis to a known good...

Page 4: ...se a tester to check the condition of the laser diode in the optical pickup The tester s internal power source can easily destroy the laser diode 1 5 4 Handling the traverse unit optical pickup 1 Do not subject the traverse unit optical pickup to strong shocks as it is a sensitive complex unit 2 Remove solder of the short lands on the flexible wire after replacing the optical pickup For specific d...

Page 5: ...ith safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated It is dangerous to defeat the safety switches 5 CAUTION If safety switches malfunction the laser is able to function 6 CAUTION Use of controls adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure Pleas...

Page 6: ...1 6 No MB112 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS ...

Page 7: ... screws B attaching the metal cover See Fig 3 3 Lift the rear section of the metal cover in the direction of the arrow while extending the lower sections of the metal cover release the claws a using a longer screwdriver from the inside as required See Fig 4 Note Do not damage any parts and boards inside the main body when releasing the joints a using a longer screwdriver Fig 1 Fig 2 Fig 3 Fig 4 Me...

Page 8: ...from the connectors CN407 CN412 on the main board See Fig 5 UJ version 4 Remove the screw C attaching the earth wire to the main board See Fig 5 5 From the bottom side of the main body remove the three screws D attaching the front panel assembly See Fig 6 6 Release the two hooks b and hook c from the both and bottom sides of the main body and remove the front panel assembly in the direction of the...

Page 9: ... bottom chassis 3 Take out the DVD changer mechanism assembly in an upward direction Note When attaching the screw E fit the hole of the DVD changer mechanism assembly to the bosses d on the bottom chassis Fig 7 3 1 4 Removing the rear panel See Fig 8 Prior to performing the following procedure remove the metal cover 1 From the back side of the main body remove the screw F ten screws G and three s...

Page 10: ... wire from the connector CN1 on the tuner See Fig 9 2 From the back side of the main body remove the two screws M attaching the tuner to the rear panel See Fig 10 3 Take out the tuner from the main body 3 1 7 Removing the power supply board See Figs 9 and 10 Prior to performing the following procedures remove the metal cover 1 From the top side of the main body disconnect the parallel wires from t...

Page 11: ...taching the audio digital input board See Fig 11 5 From the back side of the main body remove the five screws R and three screws S attaching the rear panel See Fig 12 6 Take out the rear panel together the audio digital input board and tuner 7 From the top side of the main body remove the screw T and two screws U attaching the main board to the bottom chassis See Fig 13 Note When attaching the scr...

Page 12: ...he reverse side of the microphone board remove the screw X attaching the microphone board to the brack et H phone on the phone jack board See Fig 15 US UW UG version 3 1 11 Removing the operation board See Fig 16 Prior to performing the following procedures remove the metal cover and front panel assembly 1 Remove the two screws Y attaching the operation board 2 Take out the operation board togethe...

Page 13: ...e screws AA attaching the door cover to the door assembly See Fig 18 2 Disconnect the card wire from the connector CN551 on the illumination board See Fig 19 3 Take out the illumination board from the door assembly Fig 18 Fig 19 AA Door assembly Front panel assembly Door cover Door assembly Illumination board CN551 Card wire Front panel assembly ...

Page 14: ... the front while pushing the part b of the side R assembly See Fig 4 Attention The tray can be locked if all tray assemblies are attached 5 From the topside of the DVD changer mechanism assem bly move the stopper tabs c in the direction of the arrow and release them Pull out the tray assemblies from the DVD changer mechanism assembly See Figs 4 and 5 Caution Remove the tray assembly from top tray ...

Page 15: ...vo board with the bracket See Fig 7 5 Remove the two screws C attaching the DVD servo board to the bracket See Fig 7 6 Release the three sections f of the bracket and remove the DVD servo board See Fig 7 Caution Unsolder the solders from the short circuit points d after reas sembling Fig 6 Fig 7 3 2 3 Removing the switch board See Fig 8 1 From the bottom side of the DVD changer mechanism as sembly...

Page 16: ... connecting the card wire let the card wire through the slots h of the motor board See Fig 10 When reattaching the motor turn the side where the label should be put to the front side See Fig 10 Reference You need not to remove the tray assemblies and in such case move it After connecting the motor board attach the spacer on the motor board See Fig 10 3 2 5 Removing the motor See Fig 10 Prior to pe...

Page 17: ... DVD changer mechanism as sembly disconnect the flexible wire from the connector CN101 on the DVD servo board See Fig 11 3 Disconnect the card wire from the connector CN201 on the DVD servo board See Fig 11 4 Remove the three screws G attaching the DVD traverse mechanism assembly See Fig 11 5 Take out the DVD traverse mechanism assembly from the DVD changer mechanism assembly Caution Unsolder the ...

Page 18: ...to the DVD pickup See Fig 14 8 Pull the screw shaft from the DVD pickup in the direction of the arrow See Fig 14 3 2 8 Attaching the DVD pickup See Figs 12 to 14 1 Attach the screw shaft to the DVD pickup and attach the rack arm with the screws K See Fig 14 Reference After attaching the screw shaft to the DVD pickup attach the screw shaft collar to the screw shaft See Fig 14 2 Attach the section k...

Page 19: ...he card wire through the hole n on the motor base See Fig 15 Fig 15 Fig 16 3 2 10 Removing the feed moter See Figs 17 and 18 Prior to performing the following procedures remove the tray assemblies DVD traverse mechanism assembly DVD pickup and spindle motor board Remove the wires of the feed motor as required 1 Remove the middle gear in the direction of the arrow See Fig 17 2 Remove the screw P an...

Page 20: ...he connector CN3 on the tray switch board from the motor board and detach the side L assembly in an upward direction See Fig 20 4 Remove the screw T attaching the tray switch board to the side L assembly See Fig 21 5 Release the joint tab r of the side L assembly in the direc tion of the arrow 1 and release the joint tab s while remov ing the tray switch board in the direction of the arrow 2 See F...

Page 21: ...f the chassis assembly See Figs 23 and 24 3 From the topside of the DVD changer mechanism assem bly turn the gear 1 clockwise to move the elevator cam rearward See Fig 24 4 Move the two slots v and joint w of the elevator cam and remove the elevator cam outward See Fig 24 5 Remove the three screws U and detach the side R as sembly upward See Figs 25 and 26 Caution When reattaching the side R assem...

Page 22: ...hook stopper to unlock it in the di rection of the arrow 1 and release four joints z to detach from the rack holder See Fig 29 4 Release the rod from part aa See Fig 29 5 Turn the gear 1 clockwise again to move the lifter assembly upward See Fig 30 6 Remove the lifter assembly from the DVD changer mecha nism assembly upward at the positions ab where the four pins on the both sides of the lifter as...

Page 23: ...sor assembly from the boss af on the sensor slider See Figs 35 and 36 5 Remove the screw X and Y attaching the sensor board and SV resister respectively See Fig 37 Reference Remove the soldered section ai on the sensor board as re quired See Fig 37 Caution When reattaching the SV resister attach the sensor slider to the sensor bracket and fit the lever on the bottom of the SV resister into slot aj...

Page 24: ...ack holder assembly ad W W ag ae Sensor spring Sensor assembly af Sensor slider Sensor slider aj ah af Sensor spring X Y aj ai Sensor board SV resister Sensor bracket Sensor slider ak ah af ae W Sensor assembly Slide gear Sensor spring Slide lever W ag am ...

Page 25: ...gear 2 clockwise to move the sub tray remaining inside the lifter assembly toward the front then pull out See Fig 39 5 Take out the disc on the sub tray See Fig 40 6 After clearing away the disc insert the sub tray into the main tray See Fig 41 Caution When reattaching the sub tray move the tray stopper on the bottom of the main tray in the direction of the arrow to lock the sub tray certainly See...

Page 26: ...e four screws A attaching the heat sink cover See Fig 1 2 Remove the nine screws B attaching amplifier assembly See Fig 2 3 Move the amplifier assembly backward and disconnect the wire from connector CN402 in the lower part of the amplifier assembly See Fig 2 Fig 1 Fig 2 A A Amplifier assembly Heat sink cover B B B Amplifier assembly CN402 ...

Page 27: ...e card wires from the connectors CN101 and CN102 on the mother board See Figs 4 and 5 2 Disconnect the connectors CN401 CN403 and CN404 on the SP terminal board from the connectors CN501 CN503 and CN504 on the mother board while lifting the SP terminal board upward See Fig 5 3 Take out the SP terminal board from the amplifier assembly Reference When attaching the SP terminal board insert the SP te...

Page 28: ...3 Take out the mother board assembly from the amplifier assembly Fig 6 3 3 5 Removing the mother board See Fig 7 Prior to performing the following procedures remove the amplifier assembly rear panel SP terminal board and mother board assembly 1 From the bottom side of the mother board remove the two screws G and two screws H attaching the mother board 2 Disconnect the connectors CN521 CN522 CN531 ...

Page 29: ...Prior to performing the following procedures remove the amplifier assembly rear panel SP terminal board mother board assembly and mother board 1 Remove the three screws K attaching the heat sink to the power amplifier board B See Fig 8 2 From the bottom side of the power amplifier board B disengage the four sections c of the engagement See Fig 9 3 From the top side of the power amplifier board B d...

Page 30: ...t the tip of a flat bladed screwdriver or similar tool into the space between the speaker main body and speaker net and lift the speaker net little by little to remove See Figs 12 and 13 Note To prevent damaging the speaker net and speaker main body insert cushioning plates etc to the section f and below the tip of the flat bladed screwdriver or similar tool 2 Take out the speaker net from the spe...

Page 31: ...he speaker main body remove the eight screws M attaching the speaker See Fig 14 2 Take out the speaker from the speaker main body See Fig 15 3 Disconnect the wires from the terminal of the speaker See Fig 15 Fig 14 Fig 15 Speaker Speaker main body M M Speaker Terminal Speaker main body ...

Page 32: ...move the seven hooks a attaching the net assembly to the cabinet assembly See Fig 2 CAUTION When removing the net assembly be careful not to damage the speakers and the cabinet assembly Reference As the net assembly is fixed with the adhesive and the two sided tape remove the net assembly by using a minus driver or similar tool Attach the net assembly after applying the adhesive to the hooks a 4 R...

Page 33: ...ig2 1 Remove the eight screws D attaching the two speakers 2 Take out the two speakers from the cabinet assembly 3 From the back side of the speakers disconnect the speaker wires from the speaker terminals Fig 3 D D Speaker Cabinet assembly Speaker Speaker terminal Speaker terminal Speaker wires Speaker wires ...

Page 34: ...s fixed with the adhesive and the two sided tape remove the net assembly by using a minus driver or similar tool Attach the net assembly after applying the adhesive to the hooks c 2 Remove the eight screws A attaching the center speakers 3 Take out the center speakers from the cabinet assembly 4 From the back side of the center speakers disconnect the speaker wires on the speaker terminals Fig 1 A...

Page 35: ... the following case Just after you upgrade the firmware After you confirm the symptoms that a customer points out First Initialize and then confirm whether the symptoms are improved or not After servicing before returning the main body to a customer Initialized main body should be returned to a customer 1 Set the main body at test mode 2 Press PAUSE key of the main body 3 When initialization is co...

Page 36: ...shows 1 2 and 3 at test mode 1 Press STANDBY ON key of the main body to turn the main body on not to set the main body at test mode 2 Insert the test disc VT 501 or commercial dual layer DVD software 3 Remove the disc when the FL display changes from READING to disc information 4 Perform the same procedures as in 2 and 3 above by using the test disc CTS 1000 or commercial CD DA software 5 Set the ...

Page 37: ...419 CD and DVD The laser current value of 80mA or less in normal The laser current value of over 81mA is not normal Laser diode of the pickup has been deteriorated To return to test mode press STOP key of the main body 4 7 Flap adjustment of the pick up guide shaft Please perform flap adjustment of the pick up guide shaft in the following case Just after you exchange the pick up Just after you exc...

Page 38: ... adjustment 4 After a few seconds press the numeric key 6 of the remote controller Then the FL display displays a jitter value 5 Turn the adjustment screws on the underside of the traverse mechanism with Phillips screw driver until the maximum jitter value is displayed on the FL display In this model a bigger jitter value means a better result NOTE Reference values to judge whether the jitter is a...

Page 39: ...N key of the main body to turn the main body on 2 A disc button is pushed after inserting an upgrade disc in a tray 1 3 When FL display of the main body changes from READING to UPGRADE press cursor UP key of the remote controller 4 The entire screen becomes blue and upgrading starts 5 The tray opens automatically Remove the upgrade disc 6 The screen returns to the normal screen Then press the STAN...

Page 40: ...1 40 No MB112 SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING ...

Page 41: ... No MB112 1 41 ...

Page 42: ... No MB112 AV MULTIMEDIA COMPANY AUDIO VIDEO SYSTEMS CATEGORY 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan VICTOR COMPANY OF JAPAN LIMITED WPC Printed in Japan ...

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