JVC-TN2006.1026-cd-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2007 Victor Company of Japan, Limited No.MY008 2007/9 CD MECHANISM MY00820079 SERVICE MANUAL TN2007-1026 COPYRIGHT 2007 Victor Company of Japan, Limited Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MY008) SECTION 1 PRECAUTIONS 1.1Safety 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. RadioFans.CN 收音机爱 好者资料库 (No.MY008)1-3 1.2Preventing 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. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.3Handling 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) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.4Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit. (If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire. 1M (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate Wires Push switch Pickup Base board Pickup Connector Flexible wire Frame CD mechanism assembly 1-4 (No.MY008) 1.5Important for laser products 1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when open. Do not stare into beam. (Others) Visible and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 4.CAUTION : This laser product uses visible and/or invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. 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 here in may result in hazardous radiation exposure. ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. (No.MY008)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MY008) SECTION 3 DISASSEMBLY 3.1CD mechanism assembly 3.1.1Removing the top cover (See Figs.1 and 2) (1) From the both side of the CD mechanism assembly, re- move the four screws A attaching the top cover. (See Fig.1.) (2) Lift the front side of the top cover and move the top cover backward to release the two joints a. (See Figs.1 and 2.) Fig.1 Fig.2 A A A a Top cover A a Top cover (No.MY008)1-7 3.1.2Removing the push switch (See Figs.3) (1) From the bottom side of the CD mechanism assembly, re- move the screw B attaching the push switch. (2) Take out the push switch from the CD mechanism assem- bly. Reference: Remove the wires from soldered sections b of the push switch as required. 3.1.3Removing the base board (See Figs.3 and 4) Caution: Solder the short land c before the flexible wire is disconnected from the connector on the pickup. If the flexible wire is discon- nected without applying solder, the pickup may be destroyed by static electricity. (See Fig.3.) (1) From the bottom side of the CD mechanism assembly, re- move the screw C attaching the base board. (See Figs.3 and 4.) (2) Solder the short land c on the pickup. (See Fig.3.) (3) Disconnect the flexible wire from the connector on the pick- up. (See Fig.3.) (4) Remove the base board from the joints d of the frame in the direction of the arrow. (See Figs.3 and 4.) Reference: Remove the wires from the soldered sections e on the base board as required. (See Fig.3.) Caution: When reattaching the base board, be sure to remove solder from the short land c after connecting the flexible wire. (See Fig.3.) Fig.3 Fig.4 B b Wires Push switch Pickup e C Base board d Pickup c Connector Flexible wire Frame CD mechanism assembly C Base board Flexible wire Frame d 1-8 (No.MY008) 3.1.4Removing the chassis unit (See Figs.5 and 6) Remove the top cover and base board. (1) From the top side of the CD mechanism assembly, remove the front suspension springs and rear suspension springs attaching the chassis unit to the frame. (See Fig.5.) (2) Remove the chassis unit from the dampers on the frame in an upward direction. (See Fig.6.) Note: Pay attention to misuse and loss of each spring. (See Fig.5.) When reassembling, make sure that the three shafts on the underside of the chassis unit are inserted to the dampers certainly. (See Fig.6.) Fig.5 Fig.6 Front suspension spring Rear suspension springRear suspension spring Front suspension spring Chassis unit Frame Chassis unit Shaft Shaft Shaft Damper R Damper F Damper F Frame (No.MY008)1-9 3.1.5Removing the clamper assembly (See Figs.7 and 8) Remove the top cover. Move the clamper assembly in the direction of the arrow to re- lease the joints f from the chassis unit. Fig.7 Fig.8 ff Clamper assembly Chassis unit f f Clamper assembly Chassis unit 1-10 (No.MY008) 3.1.6Removing the loading/feed motor assembly (See Fig.9) Remove the top cover, base board and chassis unit. From the bottom side of the chassis unit, remove the screw D and take out the loading/feed motor assembly in the direction of the arrow. Reference: Remove the wires from the soldered sections g of the loading/ feed motor assembly as required. Fig.9 D Loading/feed motor assembly g Loading/feed motor assembly Chassis unit (No.MY008)1-11 3.1.7Removing the pickup (See Figs.10 to 12) Remove the top cover, base board and chassis unit. (1) From the bottom side of the chassis unit, remove the screw E attaching the pu. shaft holder B and pull the pu. shaft out of the pu. shaft holder A. (See Fig.10.) (2) Remove the screw F attaching the pu. shaft holder A. (See Fig.10.) (3) Take out the pickup with pu. shaft holder A and feed screw assembly from the chassis unit. (See Fig.11.) (4) Remove the section h of the pu. shaft holder A in the direc- tion of the arrow. (See Fig.11.) (5) Remove the feed screw assembly from the section j of the pickup in the direction of the arrow. (See Fig.11.) (6) Remove the screw G attaching the feed screw holder to the pickup. (See Fig.12.) Reference: Remove the feed nut spring from the feed screw holder as required. (See Fig.12.) (7) Release the claw k in the direction of the arrow to remove the feed sub holder. (See Fig.12.) 3.1.8Reattaching the pickup (See Figs.10 to 13) (1) Reattach the feed sub holder to the pickup. (See Fig.12.) (2) Reattach the feed screw holder to the pickup using the screw G. (See Fig.12.) (3) Reattach the feed screw assembly and pu. shaft holder A to the pickup as before. (See Fig.11.) (4) Set the section m of the pickup to the rail of the chassis unit at first and attach the pickup to the chassis unit with the screw F as before. (See Figs.10 and 13.) (5) Attach the pu. shaft to the pickup as before. (See Fig.10.) (6) Attach the pu. shaft holder B to the chassis unit with the screw E as before. (See Fig.10.) Fig.10 Fig.11 Fig.12 Fig.13 Pu. shaft holder A Chassis unit Pu. shaft Pickup Pu. shaft holder B E F Pickup Feed screw assembly Pu. shaft holder A h j k Pickup Feed screw holder Feed sub holder G Feed screw holder Feed nut spring F Chassis unit Pickup m Rail 1-12 (No.MY008) 3.1.9Removing the trigger arm (See Fig.14) Remove the top cover, base board, chassis unit and clamper assembly. (1) From the top side of the chassis unit, remove the trigger arm spring from the sections (n, p). (2) From the bottom side of the chassis unit, release the claws q of the trigger arm base in the direction of the arrow to re- move them from the sections r of the chassis unit to the other side. Note: When releasing the claws q, take care not to break them. (3) From the top side of the chassis unit, move the select arm R and select lock arm in the direction of the arrow to re- move the trigger arm base from the section s in the direc- tion of the arrow. (4) Remove the trigger arm from the section t. Fig.14 3.1.10 Removing the top plate assembly (See Fig.15) Remove the top cover, base board, chassis unit, clamper as- sembly and trigger arm. (1) Remove the screw H attaching the top plate assembly. (2) Move the top plate assembly in the direction of the arrow to release the joints (u, v). Reference: Remove the wires from the soldered sections w of the top plate assembly as required. Note: When reassembling, solder the wires as before. Fig.15 Chassis unit q r Trigger arm base Trigger arm p t n Trigger arm spring s Select lock arm Select arm R Chassis unit H w Wire(Red) Top plate assembly Wire(White) Wire(Brown) u v (No.MY008)1-13 3.1.11 Removing the mode switch (See Fig.16) Remove the top cover, base board, chassis unit, clamper as- sembly, trigger arm and top plate assembly. (1) From the top side of the top plate assembly, remove the link gear spring from the sections x of the link gear L and link gear R. (2) Remove the link gear L in an upward direction while releas- ing the claws y of the link gear L in the direction of the ar- row. (3) Move the mode switch in the direction of the arrow 1 to re- move the sections z of the top plate assembly. (4) Move the mode switch in the direction of the arrow 2 and remove the mode switch from the sections (aa, ab). Note: When reattaching the link gear L, attach it after aligning the hole ac of the link gear L to the hole ac of the link gear R. Reference: When reassembling, reverse the above removing procedure. Fig.16 1 2 Link gear LLink gear R Top plate assembly Link gear spring Mode switch x y y ab aa acac Link gear R Link gear L z 1-14 (No.MY008) 3.1.12 Removing the select arm R and select lock arm (See Figs.17 and 18) Remove the top cover, base board, chassis unit, clamper as- sembly, trigger arm and top plate assembly. (1) From the top side of the top plate assembly, remove the link gear spring from the sections ad of the link gear L and link gear R. (See Fig.17.) (2) Remove the link gear R in an upward direction while releas- ing the claws ae of the link gear R in the direction of the ar- row. (See Fig.17.) (3) Move the select arm R in the direction of the arrow 1 to re- move the sections af of the top plate assembly. (See Fig.17.) (4) Move the select arm R in the direction of the arrow 2 and remove the select arm R from the sections ag. (See Fig.17.) (5) From the bottom side of the top plate assembly, remove the select lock arm spring from the section ah. (See Fig.18.) (6) From the top side of the top plate assembly, remove the section aj of the select lock arm from the top plate assem- bly at first and remove the sections (ak, am) of the select lock arm from the top plate assembly. (See Fig.18.) Note: When removing the select lock arm spring, be careful not to lose it. (See Fig 18.) When reattaching the link gear R, attach it after aligning the hole an of the link gear R to the hole an of the link gear L. (See Fig.17.) Reference: When reassembling, reverse the above removing procedure. Fig.17 Fig.18 1 2 Link gear L Link gear R Top plate assembly Link gear spring ad ae ae anan Link gear R Link gear L ag af Select arm R aj ak Select lock arm Top plate assembly am ah Select lock arm spring (No.MY008)1-15 3.1.13 Removing the loading roller assembly (See Figs.19 to 21) Remove the top cover, base board, chassis unit, clamper as- sembly and top plate assembly. (1) From the left side of the chassis unit, remove the screw J attaching the lock arm assembly. (See Fig.19.) (2) Remove the projection ap of the lock arm assembly from the joint aq while opening the cam plate R in the direction of the arrow. (See Fig.19.) (3) Remove the lock arm assembly from the projection ar of the chassis unit. (See Fig.19.) (4) Remove the projection as of the lock arm assembly from the joint at of the cam plate L assembly. (See Fig.19.) (5) From the right side of the lock arm assembly, remove the loading roller spring L from the section au. (See Fig.20.) (6) From the top side of the lock arm assembly, remove th