Jvc-UXG-377-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2011 Victor Company of Japan, LimitedNo.MB7292011/7MICRO COMPONENT SYSTEMMB72920117SERVICE MANUALUX-G375A, UX-G375B, UX-G375E, UX-G375EN, UX-G375EV, UX-G375UP, UX-G375US, UX-G375UT, UX-G375UW, UX-G377E, UX-G377EN, UX-G377EV, UX-G377UT, UX-G395BE, UX-G395BEN, UX-G395BEY, UX-G395WE, UX-G395WEN, UX-G395WEY COPYRIGHT © 2011 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-115 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11CA-UXG375CA-UXG395SP-UXG375SP-UXG395CA-UXG377SP-UXG375SP-UXG375SP-UXG395SP-UXG375Europe onlyFor Russia1-2 (No.MB729)SPECIFICATIONFor EuropeDesigns furthermore the manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must neverbe replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts inthe product have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother than specified by the manufacturer may not have the same safety characteristics as the recommended replacement partsshown in the Parts List of the Service Manual and may create shock, fire, or other hazards.(4) The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts,high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service isrequired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned tonormal, after re-assembling.1.5.1 Warning(1) Service should be performed by qualified personnel only.(2) This equipment has been designed and manufactured to meet international safety standards.(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.(4) Repairs must be made in accordance with the relevant safety standards.(5) It is essential that safety critical components are replaced by approved parts.(6) If mains voltage selector is provided, check setting for local voltage.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.1-6 (No.MB729)1.6 Preventing 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.1.6.1 Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. 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 tester's internal power source can easilydestroy the laser diode. 1.7 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) 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) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.8 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text for the pickup unit. Apply solder to the short land sections before the card wire is disconnected from the connector on the servo board. (If the card wireis disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the card wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapsolder short part(No.MB729)1-71.9 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. Do not stare into beam.(Others) Visible and/or invisible class 1M laser radiationwhen open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation whenopen and inter lock failed or defeated. Avoid directexposure 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 ableto function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS and PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck. WARNING LABEL and PRINT1-8 (No.MB729)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body (Used model: UX-G377E)3.1.1 Removing the Top cover (See Fig.1, 2, 3, 4)(1) Remove the four screws A attaching the Top cover. (SeeFig.1)Fig.1(2) Remove the four screws B attaching the Top cover. (SeeFig.2)Fig.2(3) Remove the two screws C and two screws D attaching bothside of the Top cover. (See Fig.3)Fig.3ABBCD(No.MB729)1-9(4) Disengage two hooks a engaged Top cover. (See Fig.4)Fig.43.1.2 Removing the MCU board (See Fig.5)(1) Disconnect the connector wire from MCU board connectedto connector CN3 of the SMPS board.(2) Disconnect the card wire from Tuner pack connected toconnector CN201 of the MCU board.(3) Remove the three screws E attaching the MCU board.(4) Disconnect the card wire from Display board connected toconnector CN202 of the MCU board.(5) Disconnect the connector wire from CD board connected toconnector CN208 of the MCU board.(6) Disconnect the connector wire from USB board connectedto connector CN210 of the MCU board.(7) Disconnect the connector wire from SMPS board connect-ed to connector CN203 of the MCU board.(8) Disconnect the card wire from CD board connected to con-nector CN207 of the MCU board.Fig.53.1.3 Removing the SMPS board (See Fig.6)(1) Disconnect the earth wire from Tuner pack connected topost pin GND of the SMPS board.(2) Remove the four screws F attaching the SMPS board.(3) Disconnect the connector wire from Display board connect-ed to connector CN5 of the SMPS board.(4) Disconnect the connector wire from USB board connectedto connector CN1 of the SMPS board.Fig.63.1.4 Removing the CD mechanism (See Fig.7, 8, 9, 10, 11)(1) Remove the two screws G attaching the Back PCB brack-et. (See Fig.7)Fig.7(2) Remove the four screws H attaching the CD mechanism.(See Fig.8)Fig.8hook aCN3CN201CN202 CN203CN208CN210CN207EEFFFGNDCN5CN1GHH1-10 (No.MB729)(3) Disconnect the connector wire from CD board connected toconnector of the Loader board. (See Fig.9)(4) Disconnect the connector wire from CD board connected toconnector of Traverse mechanism. (See Fig.9)Fig.9(5) Solder the solder short part of the pickup. (See Fig.10)Fig.10(6) Disconnect the card wire from CD mechanism connectedto connector CN102 of the CD board. (See Fig.11)Fig.113.1.5 Removing the Front panel (See Fig.12, 13, 14)(1) Remove the two screws J attaching the Front panel. (SeeFig.12)Fig.12(2) Disengage two hooks b engaged both side of the Frontpanel. (See Fig.13)Fig.13(3) Disconnect the connector wire from USB board connectedto connector CN114 of the CD board. (See Fig.14)Fig.143.1.6 Removing the CD board (See Fig.15)(1) Remove the four screws K attaching the CD board.Fig.15connector of loader boardconnector of traverse mechanismsolder short partCN102Jhook bCN114KK