JVC-THS8-ddcs-sm 维修电路原理图.pdf

《JVC-THS8-ddcs-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《JVC-THS8-ddcs-sm 维修电路原理图.pdf（87页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUALCOPYRIGHT 2004 Victor Company of Japan, LimitedNo.MB2362004/6DVD DIGITAL CINEMA SYSTEMMB23620046TH-S9,TH-S8,TH-S7TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3、1-94ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-265TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . 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-S8TH-S7XV-THS7SP-PWS7SP-THS7FSP-TH7SSP-THS9CX

5、V-THS9SP-PWS9SP-THS9FSP-THS9SSP-THS9CXV-THS8SP-PWS8SP-THS9FSP-THS9SSP-THS9CRadioFans.CN 收音机爱 好者资料库1-2 (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 s

6、ampling 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 sectionTotal Harmonic Distortion*10.0

7、2%Digital input*2DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm E30 nm)Video sectionVideo SystemPALHorizontal Resolution500 linesSignal-to-Noise Ratio(Composite signal when RGB is selected)64 dBVideo output level Composite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.3 V(p-p)/75 Component-Y1.0 V(

8、p-p)/75 Component-PB/PR0.7 V(p-p)/75 RGB0.7 V(p-p)/75 Tuner sectionTuning RangeFM87.50 MHz to 108.00 MHzAM (MW)522 kHz to 1 629 kHzGeneralPower RequirementsAC 230 V , 50 HzPower Consumption18 W (at operation) 2.0 W (in standby mode)Dimensions (W H D)435 mm 58 mm 319 mmMass3.5 kgAudio sectionTotal Ha

9、rmonic Distortion*10.02%Digital input*2DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm E30 nm)Video sectionVideo SystemPALHorizontal Resolution500 linesSignal-to-Noise Ratio(Composite signal when RGB is selected)64 dBVideo output levelComposite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.3 V(p-p)

10、/75 Component-Y1.0 V(p-p)/75 Component-PB/PR0.7 V(p-p)/75 RGB0.7 V(p-p)/75 Tuner sectionTuning RangeFM87.50 MHz to 108.00 MHzAM (MW)522 kHz to 1 629 kHzGeneralPower RequirementsAC 230 V , 50 HzPower Consumption18 W (at operation) 2.0 W (in standby mode)Dimensions (W H D)435 mm 57 mm 319 mmMass3.0 kg

11、RadioFans.CN 收音机爱 好者资料库(No.MB236)1-3Subwoofer (SP-PWS9/SP-PWS7)Subwoofer (SP-PWS8)Satellite SpeakersDesigns & specifications are subject to change without notice.Amplifier sectionFront/Center/Surround80 W per hannel, RMS at 6 (Center/Surround)/120 W per hannel, RMS at 4 (Front) at 1 kHz, with 10 % t

12、otal harmonic distortion.Subwoofer120 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.Speaker sectionSpeaker unit16 cm Bass-reflex, Magnetically ShieldedFrequency Range30 Hz to 200 HzGeneralPower RequirementsAC 230 V , 50 HzPower Consumption110 W (at operation) 0 W (in standby mode)Dimens

13、ions (W H D)170 mm 412 mm 444 mmMass12.0 kgAmplifier sectionFront/Center/Surround80 W per hannel, RMS at 6 (Center/Surround)/120 W per hannel, RMS at 4 (Front) at 1 kHz, with 10 % total harmonic distortion.Subwoofer120 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.Speaker sectionSpeaker

14、 unit16 cm Bass-reflex, Magnetically ShieldedFrequency Range30 Hz to 200 HzGeneralPower RequirementsAC 230 V , 50 HzPower Consumption110 W (at operation) 0 W (in standby mode)Dimensions (W H D)170 mm 412 mm 444 mmMass12.0 kgFront speakers (SP-THS9F)Speakers5.5 cm 2, 3.0 cm Bass-reflex, Magnetically

15、ShieldedPower Handling Capacity 120 WImpedance4 Frequency Range95 Hz to 40 kHzDimensions (W H D)250 mm 1 103 mm 250 mmMass3.67 kgSurround speakers (SP-THS9S)Speakers5.5 cm 2 Bass-reflex, Magnetically ShieldedPower Handling Capacity 80 WImpedance6 Frequency Range90 Hz to 30 kHzDimensions (W H D)250 m

16、m 1 103 mm 250 mmMass3.77 kgCenter speaker (SP-THS9C)Speakers5.5 cm 2, 3.0 cm Bass-reflex, Magnetically ShieldedPower Handling Capacity 80 WImpedance6 Frequency Range90 Hz to 40 kHzDimensions (W H D)209 mm 85 mm 92 mmMass0.87 kg1-4 (No.MB236)SECTION 1PRECAUTION1.1Safety Precautions(1) This design of

17、 this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits

18、. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufa

19、cture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessaril

20、y be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by (

21、 ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dresse

22、d with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedth

23、at they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter reassembling the product, always perform an isola-tion check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to be su

24、re the productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using aLeakage Current Tester, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any e

25、xposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. C

26、onnect a 1,500 10W resistorparalleled by a 0.15F AC-type capacitor between an ex-posed metal part and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a return

27、path to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2Warning(1) This equipment has been designed and manufactured tomeet

28、 international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mai

29、ns voltage selector is provided, check setting for localvoltage.1.3CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4Critical parts for safetyIn regard with component parts appea

30、ring on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating as specifie

31、d by the manufacturer. (This regulation dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE(No.MB236)1-51.5 Safety Precautions (U.K only)(1) This design of this product contains

32、 special hardware and many circuits and components specially for safety purposes. For con-tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in the original circuits.(2) Any unauthor

33、ised design alterations or additions will void the manufacturers guarantee; 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 schem

34、atics, 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 t

35、he 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 sep

36、arated 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.

37、1.5.1Warning(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 acc

38、ordance 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

39、 to such burrs in the case of preforming repair of this system.1-6 (No.MB236)1.6Preventing 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

40、 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) Gr

41、ound 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 th

42、e 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

43、 of the laser diode in the optical pickup. The testers internal power source can easilydestroy the laser diode. 1.7Handling 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 th

44、e 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

45、 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.1.8Attention when traverse unit is decomposed*Please refer to Disassembly method in the text for the pickup unit. Apply solder to th

46、e 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 connecti

47、ng the flexible wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapTraverse mechanism assemblyPickupShort land sectionCard wireConnector(No.MB236)1-71.9Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter

48、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 safet

49、y 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 performanc

50、e 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 laserstrlning nr