Jvc-THS-9-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2004 Victor Company of Japan, LimitedNo.MB2362004/6DVD DIGITAL CINEMA SYSTEMMB23620046TH-S9,TH-S8,TH-S7TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-94 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-265 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30Area suffixB - U.K.E - Continental EuropeEN - Northern EuropeEV - Eastern EuropeTH-S9Area suffixB - U.K.E - Continental EuropeEN - Northern EuropeTH-S8Area suffixE - Continental EuropeEN - Northern EuropeEV - Eastern EuropeTH-S7TH-S9SD cardTH-S8 TH-S7XV-THS7SP-PWS7SP-THS7F SP-TH7SSP-THS9CXV-THS9SP-PWS9SP-THS9F SP-THS9SSP-THS9CXV-THS8SP-PWS8SP-THS9F SP-THS9SSP-THS9C1-2 (No.MB236)SPECIFICATIONCenter unit (XV-THS9/XV-THS7)*1: This value is measured at System cord CONNECTOR for reference.*2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)Center unit (XV-THS8)*1: This value is measured at System cord CONNECTOR for reference.*2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)Audio section Total Harmonic Distortion*1 0.02%Digital input*2 DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm E30 nm)Video section Video System PALHorizontal Resolution 500 linesSignal-to-Noise Ratio(Composite signal when “RGB“ is selected)64 dBVideo output level Composite 1.0 V(p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C 0.3 V(p-p)/75 Component-Y 1.0 V(p-p)/75 Component-PB/PR 0.7 V(p-p)/75 RGB 0.7 V(p-p)/75 Tuner section Tuning Range FM 87.50 MHz to 108.00 MHzAM (MW) 522 kHz to 1 629 kHzGeneral Power Requirements AC 230 V , 50 HzPower Consumption 18 W (at operation) 2.0 W (in standby mode)Dimensions (W × H × D) 435 mm × 58 mm × 319 mmMass 3.5 kgAudio section Total Harmonic Distortion*1 0.02%Digital input*2 DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm E30 nm)Video section Video System PALHorizontal Resolution 500 linesSignal-to-Noise Ratio(Composite signal when “RGB“ is selected)64 dBVideo output level Composite 1.0 V(p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C 0.3 V(p-p)/75 Component-Y 1.0 V(p-p)/75 Component-PB/PR 0.7 V(p-p)/75 RGB 0.7 V(p-p)/75 Tuner section Tuning Range FM 87.50 MHz to 108.00 MHzAM (MW) 522 kHz to 1 629 kHzGeneral Power Requirements AC 230 V , 50 HzPower Consumption 18 W (at operation) 2.0 W (in standby mode)Dimensions (W × H × D) 435 mm × 57 mm × 319 mmMass 3.0 kg(No.MB236)1-3Subwoofer (SP-PWS9/SP-PWS7)Subwoofer (SP-PWS8)Satellite SpeakersDesigns 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.MB236)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 flexible wire is disconnected from the connecto on the servo board. (If the flexiblewire is 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 flexible wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapTraverse mechanism assemblyPickupShort land sectionCard wireConnector(No.MB236)1-71.9 Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.3.CAUTION : There are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The CD,MD and DVD player uses 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.REPRODUCTION AND POSITION OF LABELSCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrålning när den öppnas och spärren ärurkopplad. Betrakta ejstrålen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina näkyvälle ja näkymättömällelasersäteilylle. Vältä säteenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstråling når maskinen eråben eller interlocken fejeler.Undgå direkte eksponering til stråling. (d)!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrålning när den öppnas och spärren ärurkopplad. Betrakta ejstrålen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina näkyvälle ja näkymättömällelasersäteilylle. Vältä säteenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstråling når maskinen eråben eller interlocken fejeler.Undgå direkte eksponering til stråling. (d)WARNING LABEL1-8 (No.MB236)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB236)1-9SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the top cover assembly (See Figs.1 to 3) For XV-THS9 and XV-THS7 models(1) From the back side of the main body, remove the fivescrews A attaching the top cover assembly. (See Fig.1)(2) From the both sides of the main body, release the engage-ment sections a to remove the side panels (L)/(R) from themain body in the direction of the arrow. (See Figs.2 and 3.)(3) Remove the four screws B attaching the top cover assem-bly. (See Figs.2 and 3.)(4) Lift the rear section of the top cover assembly upward andremove the top cover assembly from the main body. (SeeFigs.2 and 3.)3.1.2 Removing the metal cover (See Figs.1 to 3) For XV-THS8 model(1) From the back side of the main body, remove the threescrews A attaching the metal cover. (See Fig.1)(2) From the both sides of the main body, remove the fourscrews B attaching the metal cover. (See Figs.2 and 3)(3) Lift the rear section of the metal cover upward while ex-tending the lower sections of the metal cover. (See Figs.2and 33.)Fig.1Fig.2Fig.3ATop cover assemblyBMetal coverXV-THS8XV-THS9, XV-THS7BTop cover assemblySide panel (R)aBMetal coverXV-THS8XV-THS9, XV-THS7BaTop cover assemblySide panel (L)1-10 (No.MB236)3.1.3 Removing the front panel assembly (See Figs.4 and 5) Prior to performing the following procedures, remove the topcover assembly or metal cover.(1) From the top side of the main body, disconnect the cardwires from the connectors (CN451, CN452) on the mainboard. (See Fig.4)(2) Disconnect the card wire from the connector CN802 on theSD card board. For XV-THS9 and XV-THS7 models(See Fig.4.)(3) Remove the screw C attaching the earth wires to the mainboard. (See Fig.4)Reference:When attaching the screw C, attach the earth wires withit. (See Fig.4)(4) From the bottom side of the main body, remove the fourscrews D attaching the front panel assembly. (See Fig.5)(5) Remove the front panel assembly in the direction of the ar-row while releasing the joint b. (See Fig.5)Fig.4Fig.5CCN452Earth wire TH-S9,TH-S7Earth wireCN451CN802Main boardSD boardD DbFront panel assembly