Jvc-THS-55-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB3652005/4DVD DIGITAL CINEMA SYSTEMMB36520054TH-S55,TH-S66TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-

2、42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、1-94 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-215 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . 1-26Area suffixB - U.K.E - Continental EuropeEN - Northern EuropeEV - Eastern EuropeEE - Russian Federation(SP-THS55F)(SP-THS55C) (SP-THS55S)(SP-PWS66)(SP-PWS55)(XV-THS55,XV-THS66)(SP-THS66F)(SP-THS66F) (SP-THS66C) (SP-THS66S)1-2 (No.MB365)SPECIFICATIONCenter unit (XV-THS66/XV-THS55)*1: Th

5、is 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)Subwoofer (SP-PWS66/SP-PWS55)Audio section Total Harmonic Distortion*1 0.02%Digital input*2 DIGITAL IN(OPTICAL) : -

6、21 dBm to -15 dBm (660 nm 30 nm)Video section Video System PALHorizontal Resolution 500 linesSignal-to-Noise Ratio 64 dB(Composite signal when “RGB“ is selected)Video 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/P

7、R : 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 17 W (at operation)1.3 W (in standby mode)Dimensions (W H D) 435 mm 55 mm 304 mmMass 2.5 kgAmplifier section Front 1

8、40 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion.Center/Surround 130 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion.Subwoofer 140 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.Speaker section Speaker unit 16 cm Bass-reflexPower Handling Cap

9、acity 140 WImpedance 4 Frequency Range 30 Hz to 200 HzGeneral Power Requirements AC 230 V , 50 HzPower Consumption 135 W (at operation)0 W (in standby mode)Dimensions (W H D) 170 mm 411 mm 451 mmMass 11.5 kg(No.MB365)1-3Satellite SpeakersDesigns furthermore the manufacturer cannotaccept responsibili

10、ty 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 mech

11、anical 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 Se

12、rvice 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 hazar

13、d. 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

14、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)

15、 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.MB365)1.6 Preventing static electricityElectrostatic disch

16、arge (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 a

17、rea 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 befor

18、e 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 rep

19、lacement 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. 1.7 Handling the

20、 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 procedur

21、e 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

22、 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

23、 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 mechanis

24、m assemblyDVD pickup(No.MB365)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.

25、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

26、 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 Invi

27、sible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrlning nr den ppnas och sprren rurkopplad. Betrakta ejstrlen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmllelasers

28、teilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstrling nr maskinen erben eller interlocken fejeler.Undg direkte eksponering til strling. (d)!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LAS

29、ER PRODUCTCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrlning nr den ppnas och sprren rurkopplad. Betrakta ejstrlen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet

30、alttiina nkyvlle ja nkymttmllelasersteilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstrling nr maskinen erben eller interlocken fejeler.Undg direkte eksponering til strling. (d)WARNING LABEL1-8 (No.MB365)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual

31、does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB365)1-9SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the metal cover (See Figs.1 to 3)(1) From the both sides of the main body, remove the fourscrews A attaching the metal cover. (See Figs.1 and 2)(2) From the back side of the main body

32、, remove the fivescrews B attaching the metal cover. (See Fig.3)(3) Lift the rear section of the metal cover upward while ex-tending the lower sections of the metal cover. (See Fig.3)Fig.1Fig.2Fig.3AMetal coverAMetal coverMetal coverB1-10 (No.MB365)3.1.2 Removing the front panel assembly (See Figs.4

33、 to 7) Prior to performing the following procedures, remove the metalcover.(1) From the top side of the main body, disconnect the parallelwires from the connector CN420 on the main board. (SeeFig.4)(2) Disconnect the parallel wires from the connectors CN451,CN452 and CN460 on the main board. (See Fi

34、g.4)(3) Remove the screw C attaching the earth wire to the mainboard. (See Fig.4)(4) Remove the earth wire attaching to the chassis base. (SeeFig.4)Reference:When attaching the screw C, attach the earth wire withit. (See Fig.4)(5) From the bottom side of the main body, remove the threescrews D attac

35、hing the front panel assembly. (See Fig.5)(6) Remove the front panel assembly in the direction of the ar-row while releasing the two joints a and two joints b. (SeeFig.5 to 7)Fig.4Fig.5Fig.6Fig.7CCN452CN460Earth wire Front panel assemblyCN451CN420Main boardDFront panel assemblyJoint aFront panel assemblyJoint bFront panel assemblyJoint b