JVC-TN2006_1026-cd-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2007 Victor Company of Japan, LimitedNo.MY0082007/9CD MECHANISMMY00820079 SERVICE MANUALTN2007-1026COPYRIGHT 2007 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-195TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19RadioFans.CN 收音机爱 好者资料库1-2 (No.MY008)SECTION 1PRECAUTIONS1.1Safety 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)1-31.2Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.2.1 Grounding to prevent damage by static electricityStatic 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 workbenchGround the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfUse 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 opticalpickup 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 easilydestroy 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 thereplacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long atime 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 strapConductive material(conductive sheet) or iron plateWiresPush switchPickupBase boardPickupConnectorFlexible wireFrameCD mechanismassembly1-4 (No.MY008)1.5Important for laser products1.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 operationcheck. (No.MY008)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.MY008)SECTION 3DISASSEMBLY3.1CD mechanism assembly3.1.1Removing 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. (SeeFig.1.)(2) Lift the front side of the top cover and move the top coverbackward to release the two joints a. (See Figs.1 and 2.)Fig.1Fig.2AAAaTop coverAaTop cover(No.MY008)1-73.1.2Removing 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 switchas required.3.1.3Removing the base board (See Figs.3 and 4)Caution:Solder the short land c before the flexible wire is disconnectedfrom the connector on the pickup. If the flexible wire is discon-nected without applying solder, the pickup may be destroyedby 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.3and 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 thedirection of the arrow. (See Figs.3 and 4.)Reference:Remove the wires from the soldered sections e on the baseboard as required. (See Fig.3.)Caution:When reattaching the base board, be sure to remove solderfrom the short land c after connecting the flexible wire. (SeeFig.3.)Fig.3Fig.4BbWiresPush switchPickupeCBase boarddPickupcConnectorFlexible wireFrameCD mechanismassemblyCBase boardFlexible wireFramed1-8 (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, removethe front suspension springs and rear suspension springsattaching the chassis unit to the frame. (See Fig.5.)(2) Remove the chassis unit from the dampers on the frame inan 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 theunderside of the chassis unit are inserted to the damperscertainly. (See Fig.6.)Fig.5Fig.6Front suspension springRear suspension springRear suspension springFront suspension springChassis unitFrameChassis unitShaftShaftShaftDamper RDamper FDamper FFrame(No.MY008)1-93.1.5Removing 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.7Fig.8ffClamper assemblyChassis unitffClamper assemblyChassis unit1-10 (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 Dand take out the loading/feed motor assembly in the direction ofthe arrow.Reference:Remove the wires from the soldered sections g of the loading/feed motor assembly as required.Fig.9DLoading/feedmotorassemblygLoading/feed motor assemblyChassis unit(No.MY008)1-113.1.7Removing 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 screwE attaching the pu. shaft holder B and pull the pu. shaft outof the pu. shaft holder A. (See Fig.10.)(2) Remove the screw F attaching the pu. shaft holder A. (SeeFig.10.)(3) Take out the pickup with pu. shaft holder A and feed screwassembly 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 thepickup in the direction of the arrow. (See Fig.11.)(6) Remove the screw G attaching the feed screw holder to thepickup. (See Fig.12.)Reference:Remove the feed nut spring from the feed screw holderas required. (See Fig.12.)(7) Release the claw k in the direction of the arrow to removethe 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 thescrew G. (See Fig.12.)(3) Reattach the feed screw assembly and pu. shaft holder Ato the pickup as before. (See Fig.11.)(4) Set the section m of the pickup to the rail of the chassis unitat first and attach the pickup to the chassis unit with thescrew 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 thescrew E as before. (See Fig.10.)Fig.10Fig.11Fig.12Fig.13Pu. shaft holder AChassis unitPu. shaftPickupPu. shaft holder BEFPickupFeed screw assemblyPu. shaft holder AhjkPickupFeed screw holderFeed sub holderGFeed screwholderFeed nutspringFChassis unitPickupmRail1-12 (No.MY008)3.1.9Removing the trigger arm (See Fig.14) Remove the top cover, base board, chassis unit and clamperassembly.(1) From the top side of the chassis unit, remove the triggerarm spring from the sections (n, p).(2) From the bottom side of the chassis unit, release the clawsq of the trigger arm base in the direction of the arrow to re-move them from the sections r of the chassis unit to theother 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 armR 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.143.1.10 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 torelease the joints (u, v).Reference:Remove the wires from the soldered sections w of the top plateassembly as required.Note:When reassembling, solder the wires as before.Fig.15Chassis unitqrTrigger arm baseTrigger armptnTrigger armspringsSelect lock armSelect arm RChassis unitHwWire(Red)Top plate assemblyWire(White)Wire(Brown)uv(No.MY008)1-133.1.11 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 thelink gear spring from the sections x of the link gear L andlink 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 andremove the mode switch from the sections (aa, ab).Note:When reattaching the link gear L, attach it after aligning thehole ac of the link gear L to the hole ac of the link gear R.Reference:When reassembling, reverse the above removing procedure.Fig.1612Link gear LLink gear RTop plate assemblyLink gear springMode switchxyyabaaacacLinkgear RLinkgear Lz1-14 (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 thelink gear spring from the sections ad of the link gear L andlink 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. (SeeFig.17.)(4) Move the select arm R in the direction of the arrow 2 andremove the select arm R from the sections ag. (SeeFig.17.)(5) From the bottom side of the top plate assembly, removethe select lock arm spring from the section ah. (SeeFig.18.)(6) From the top side of the top plate assembly, remove thesection aj of the select lock arm from the top plate assem-bly at first and remove the sections (ak, am) of the selectlock arm from the top plate assembly. (See Fig.18.)Note: When removing the select lock arm spring, be careful not tolose it. (See Fig 18.) When reattaching the link gear R, attach it after aligning thehole 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.17Fig.1812Link gear LLink gear RTop plate assemblyLink gear springadaeaeananLinkgear RLinkgear LagafSelect arm RajakSelect lock armTop plate assemblyamahSelect lockarm spring(No.MY008)1-153.1.13 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 Jattaching the lock arm assembly. (See Fig.19.)(2) Remove the projection ap of the lock arm assembly fromthe joint aq while opening the cam plate R in the directionof the arrow. (See Fig.19.)(3) Remove the lock arm assembly from the projection ar ofthe chassis unit. (See Fig.19.)(4) Remove the projection as of the lock arm assembly fromthe joint at of the cam plate L assembly. (See Fig.19.)(5) From the right side of the lock arm assembly, remove theloading roller spring L from the section au. (See Fig.20.)(6) From the top side of the lock arm assembly, remove theloading roller spring R in the direction of the arrow and re-move the loading roller assembly. (See Fig.20.)(7) Remove the roller guide R, HL washer and roller guide Lfrom the both ends of the loading roller assembly. (SeeFig.21.)Fig.19Fig.20Fig.21aqapatasarCam plate L assemblyCam plate RChassis unitLock arm assemblyJauLoading rollerspring LLoading roller assemblyLoading roller spring RLock arm assemblyRoller guide LRoller guide RHL washerLoading roller assembly1-16 (