Jvc-XVN-420-B-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2005 Victor Company of Japan, LimitedNo.YD0572005/3DVD PLAYERYD05720053XV-N420B,XV-N422STABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-155 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18OPEN/CLOSELISTSET UPCLEARSLOW + DISPLAY ON SCREENENTERSTANDBY/ONVFPI/PCANCEL RETURNSOUNDEFFECTTITLE/GROUP DIMMERAUDIOSUBTITLEANGLESLIDE EFFECTZOOM1234567890THUMBNAIL/TOPMENUMENUNEXTPREVIOUS SELECTXV-N420BEKC,XV-N420BEUC,XV-N420BEYC,XV-N420BEZC,XV-N420BERCXV-N422SEKC,XV-N422SEUC,XV-N422SEYC,XV-N422SEZC,XV-N422SERCArea SuffixEK - U.K.EU - Western EuropeEY - Northern EuropeEZ - Eastern EuropeER - Russian FederationVIDEO®1-2 (No.YD057)SPECIFICATION Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories. “DTS” and “DTS Digital Out” are trademarks of Digital Theater Systems, Inc. “Official DivX CertifiedTMproduct” “Plays DivXR5, DivXR4, DivXR3, and DivXRVOD video content (in compliance with DivX Certi-fiedTM technical requirements)” “DivX, DivX Certified, and associated logos are trademarks of DivXNetworks, Inc. and are used un-der license.” This product incorporates copyright protection technology that is protected by U.S. patents and other intellectual property rights. Useof this copyright protection technology must be authorized by Macrovision, and is intended for home and other limited viewing usesonly unless otherwise authorized by Macrovision. Reverse engineering or disassembly is prohibited. “CONSUMERS SHOULD NOTE THAT NOT ALL HIGH DEFINITION TELEVISION SETS ARE FULLY COMPATIBLE WITH THISPRODUCT AND MAY CAUSE ARTIFACTS TO BE DISPLAYED IN THE PICTURE. IN CASE OF 525 OR 625 PROGRESSIVESCAN PICTURE PROBLEMS, IT IS RECOMMENDED THAT THE USER SWITCH THE CONNECTION TO THE “STANDARDDEFINITION” OUTPUT. IF THERE ARE QUESTIONS REGARDING OUR TV SET COMPATIBILITY WITH THIS MODEL 525pAND 625p DVD PLAYER, PLEASE CONTACT OUR CUSTOMER SERVICE CENTER.”XV-N420B,XV-N422S forEK,EU,EY,EZ,ERGeneralReadable discs DVD VIDEO, DVD-R (Video format), DVD-RW (Video format), SVCD, Video CD, Audio CD (CD-DA),CD-R/RW (CD-DA, SVCD, Video CD, MP3/WMA format, JPEG, DivX) Video format PAL, 625i/625p selectable OtherPower requirements AC 230 V, 50 HzPower consumption 11.0 W (POWER ON), 1.0 W (STANDBY mode) Mass 1.5 kg Dimensions (W × H × D) 435mm × 44mm × 203.5 mmVideo outputsVIDEO OUT (pin jack) 1.0 Vp-p (75 )RGB Output 700 mVp-p (75 )Component (pin jacks) Y Output: 1.0 Vp-p (75 )Pb/Pr Output: 0.7Vp-p (75 )Horizontal resolution 500 lines or moreAudio outputsANALOG OUT (pin jack) 2.0 Vrms (10 k)DIGITAL OUT (COAXIAL) 0.5 Vp-p (75 termination)Audio characteristicsFrequency response CD (sampling frequency 44.1 kHz):2 Hz to 20 kHzDVD (sampling frequency 48 kHz):2 Hz to 22 kHz(4 Hz to 20 kHz for DTS and Dolby Digital bitstream signals)DVD (sampling frequency 96 kHz):2 Hz to 44 kHzWow and flutter Unmeasurable (less than +- 0.002%)Total harmonic distortion less than 0.009%1-6 (No.YD057)1.9 Precautions for Service1.9.1 Handling of Traverse Unit and Laser Pickup(1) Do not touch any peripheral element of the pickup or the actuator.(2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.(3) Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.)(4) To replace the traverse unit, pull out the metal short pin for protection from charging.(5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center ofthe flexible wire to open the circuit.(6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.Do not change the setting of these half-fixed resistors for laser power adjustment. 1.9.2 Destruction of Traverse Unit and Laser Pickup by Static ElectricityLaser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements ofthe traverse unit or pickup, be sure to take the following electrostatic protection:(1) Wear an antistatic wrist wrap.(2) With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground thesheet or the plate.(3) It solders to two short circuit sections on the substrate of a pick-up.(4) After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.(5) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup. After completing the repair, remove the solder to open the circuit.*Please refer to the disassembly method for details.CN101Digital boardPick-upShort circuit1-8 (No.YD057)SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the top cover (See Figure 1)(1) Remove the two screws A attaching the top cover on bothsides of the main body.(2) Remove the three screws B attaching the top cover on theback of the main body.(3) Raise the both sides and lower part of the rear of the topcover, with opening them slightly in an outward direction.And the top cover will be removed.Fig.13.1.2 Removing the front panel assembly (See Figure 2) Prior to performing the following procedure, remove the topcover. There is no need to remove the mechanism assembly.(1) Hook a and b are removed respectively, and the front panelassembly is removed.Fig.2BBBA x 2TOP COVEROP COVERHook aHook aHook bHook bFront panelassemblyHook b(No.YD057)1-93.1.3 Removing the mechanism assembly (See Figure 3, Figure 4, Figure 5) Prior to performing the following procedure, remove the topcover/front panel assembly.(1) Disconnect the card wire from connector CN503 on the FLDisplay board.(2) Remove the two screws D attaching the clamper base. (3) Disconnect the card wire from connector CN4 on the LEDboard.(4) It solders to two c sections on the pick-up unit.(5) Disconnect the card wire from connector CN201, CN202,CN101 on the digital board.ATTENTION:Please extract the wire after short-circuited of two placeson the pick-up unit in part c with solder. Please removethe solder two places of part c after connecting the wirewith CN101 when reassembling.CAUTION:Be sure to solder the short land sections “c” on the pick-up unit before disconnecting the card wire from connec-tor CN101 on the digital board.If the card wire is disconnected without attaching solder,the pick-up unit may be destroyed by static electricity. (6) Remove the three screws E attaching the mechanism as-sembly. (7) Remove the mechanism assembly by lifting the front partof the mechanism assembly.Fig.3Fig.4Fig.5DDClamper baseCN503FL Display boardEEECN4LED boardCN202CN201CN101Digital boardPick-upPart c1-10 (No.YD057)3.1.4 Removing the tray(See Figure 6, Figure 7) Prior to performing the following procedure, remove the mech-anism assembly.(1) Insert a kind of screwdriver in a hole located in the rightside of mechanism assembly, and push a lever until it can-not be inserted any further.(2) A tray is made to slide ahead.(3) Remove the two screws F attaching the shaft guide. Fig.6Fig.73.1.5 Removing the rear panel (See Figure 8 ) Prior to performing the following procedure, remove the topcover.(1) Remove the six screws G attaching the rear panel.(2) Disconnect the power cord from connector P901 on themain boardFig.8TrayPushFTrayFShaft guideMain boardGP901GG(No.YD057)1-113.1.6 Removing the digital board and main board. (See Figure 9 ,Figure 10) Prior to performing the following procedure, remove the topcover/front panel assembly/rear panel.(1) Remove the two screws H attaching the digital board.(2) Disconnect the card wire from connector CN201, CN202,CN101, CN301, CN302, CN303 on the digital board.(3) Disconnect the card wire from connector CN903, CN904on the main board.(4) Remove the four screws I attaching the main board.Fig.9Fig.103.1.7 Remove the FL Display board (See Figure 11) Prior to performing the following procedure, remove the topcover.(1) Disconnect the card wire from connector CN501, CN503on the FL Display board.(2) Remove the two screws J attaching the FL Dispiay board.Fig.11Digital boardCN303CN202CN302 HHCN101CN201CN301Main boardIIICN903CN904ICN501J JFL Display boardCN5031-12 (No.YD057)3.2 Loading mechanism assembly3.2.1 Removing the traverse mechanism assembly (See Figure 1)(1) Reverse the loading mechanism assembly. (2) A card wire is removed from a wire bracket.(3) Remove the four screws A attaching the traverse mecha-nism assembly. Remove the traverse mechanism assem-bly upward.Fig.13.2.2 Removing the elevator (See Figure 2 and Figure 3) Prior to the following procedure, remove the traverse mecha-nism assembly.(1) Remove the two arms of the elevator from the two parts aby moving the arms in a direction of the arrow.(2) Pull out the elevator in a rear direction.Attaching the elevator:Engage the two holes b to the two shafts on the front part ofthe elevator. And then, attach the elevator.Fig.2Fig.3Loading mechanism assemblyAAATraverse mechanism assemblywire bracketAPart a Part aElevatorSlide cambbShaftShaftElevator(No.YD057)1-133.2.3 Removing the loading motor (See Figure 4 and Figure 5) Prior to the following procedure, remove the tray, the traversemechanism assembly, and the elevator.(1) Remove the belt from the pulley.(2) Remove two screws B attaching the loading motor.(3) Remove two solders c on the switch board.Fig.4Fig.5Loading baseSlide camBeltBBPulleyPulleyLoading motorSwitch board Part c1-14 (No.YD057)3.3 Traverse mechanism assembly3.3.1 Removing the pickup (See Figure 6, Figure 7) Prior to the following procedure, remove the traverse mecha-nism assembly.(1) Remove one screw C attaching the plate.(2) Remove the plate and the leaf spring.(3) Lift d of the shaft 1, and pull out the shaft 1 from e.(4) Remove f of the pickup from the shaft 2.Attaching the pickup:(1) Engage f of the pickup to the shaft 2.(2) A spring is lifted and shaft 1 is inserted in the e, and at-tach the shaft 1 to d. (3) Attach the leaf spring, and then attach the plate. Fix theleaf spring and the plate by using the screw C.Fig.6Fig.7CPlateLeaf springspringPart dShaft 1Shaft 2Part fPart espring