JVC-THM65-ddcs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB1122003/12DVD DIGITAL CINEMA SYSTEMMB112200312TH-M65TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPEC

2、IFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUS

3、TMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-355TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

4、-40 Area suffixUS - SingaporeUW - Brazil,Mexico,PeruUJ - U.S.MilitaryUG - Turkey,South Africa,EgyptXV-THM65SP-PWM65SP-THM65CSP-THM65FSP-THM65FSP-THM65FSP-THM65FRadioFans.CN 收音机爱 好者资料库1-2 (No.MB112)SPECIFICATIONDesigns & specifications are subject to change without notice.Center unit (XV-THM65)AudioA

5、udio input sensitivity/Impedance (at 1 kHz), Total Harmonic Distortion 0.02 %NOTE : This value is measured at System cord CONNECTOR for reference.Analog inputAUDIO IN (VCR)290 mV/47 KMIC4.3 mV/600 Digital input*DIGITAL IN (DBS)-21 dBm to -15 dBm(OPTICAL)(660 nm E30 nm)* Corresponding to Linear PCM,

6、Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)Digital outputDIGITAL OUT-21 dBm to -15 dBm(OPTICAL)(660 nm E30 nm)VideoColor SystemNTSC/PAL selectableHorizontal Resolution500 linesSignal-to-Noise Ratio64 dBVideo output levelComposite1.0 V(p-p)/75 S-video-

7、Y1.0 V(p-p)/75 S-video-C0.286 V(p-p)/75 Component-Y1.0 V(p-p)/75 Component-PB/PR0.7 V(p-p)/75 Video input sensitivity/Impedance (VCR IN)Composite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.286 V(p-p)/75 TunerTuning RangeFM87.50 MHz to 108.00 MHzAM531 kHz to 1 602 kHz (at 9 kHz intervals)530 kHz

8、to 1 600 kHz (at 10 kHz intervals)GeneralPower RequirementsAC 110 - 230 V , 50 Hz/60 HzPower Consumption20 W (at operation) 1.6 W (in standby mode)Dimensions (W H D)400 mm 85 mm 386 mmMass4.6 kgSubwoofer (SP-PWM65)AmplifierFront/Center/Surround80 W per channel, RMS at 6 at 1 kHz, with 10 % total har

9、monic distortion.Subwoofer120 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.SpeakerSpeaker unit20 cm Bass-reflex, Magnetically ShieldedFrequency Range25 Hz to 200 HzGeneralPower RequirementsAC 110 V/127 V/220 - 230 V selectable with the voltage selector, 50 Hz/60 HzPower Consumption150

10、W (at operation) 0 W (in standby mode)Dimensions (W H D)235 mm 355 mm 492 mmMass13.0 kgSatellite Speakers (SP-THM65F)Speakers5.5 cm 2 Bass-reflex, Magnetically ShieldedPower Handling Capacity80 WImpedance6 Frequency Range90 Hz to 20 kHzDimensions (W H D)250 mm 1 103 mm 250 mmMass3.77 kgCenter Speake

11、r (SP-THM65C)Speakers5.5 cm 2 Bass-reflex, Magnetically ShieldedPower Handling Capacity80 WImpedance6 Frequency Range90 Hz to 20 kHzDimensions (W H D)258 mm 75 mm 81 mmMass0.95 kgRadioFans.CN 收音机爱 好者资料库(No.MB112)1-3SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product contains spec

12、ial 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. Services should be per-fo

13、rmed 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 themanufacture of responsibility for

14、 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 necessarily be obtained by us-ing rep

15、lacement 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 ( ) onthe Parts List in the

16、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 dressed with ties,clamps, tubings

17、, 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 confirmedthat they have been returned

18、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 sure the productis safe to op

19、erate 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 exposed metal part having a

20、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. Connect a 1,500 10W resistor

21、paralleled 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 returnpath to the chassis, and me

22、asure 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 international safety stand

23、ards.(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 mains voltage selector is prov

24、ided, 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 appearing on the silk-screenprin

25、ted 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 specified by the manufacturer. (Thi

26、s 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 TYPE1-4 (No.MB112)1.5Preventing static electricity1.5.1Grounding to prevent damage by static electricityElectrostatic

27、 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.1.5.2About the earth processing for the destruction prevention by static electric

28、ityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.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)

29、 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.1.5.3Handling the optical pickup(1) In order to maintain quality during transport and before installation, both s

30、ides of the laser diode on the replacement optical pick-up are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)(2) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easilyde

31、stroy the laser diode.1.5.4Handling 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) Remove solder of the short lands on the flexible wire after replacing the optical pickup. For specific details, refer t

32、o the replace-ment procedure in the text. Remove the anti-static pin when replacing the traverse unit.Be careful not to take too long a time when attaching it to the connector.(3) Handle the flexible wire carefully as it may break when subjected to strong force.(4) It is not possible to adjust the s

33、emi-fixed resistor that adjusts the laser power. Do not turn it.1.5.5Attention when traverse unit is decomposed*Please refer to Disassembly method in the text for the DVD pickup. Apply solder to the short circuit points before the flexible wire is disconnected from the connector on the DVD pickup. (

34、If the flexible wire is disconnected without applying solder, the DVD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short circuit points after connecting the flexible wire.Conductive material (conductive sheet) or iron plate(caption)Anti-static wr

35、ist strapDVD pickupDVD changer mechanism assemblyShort circuit points(No.MB112)1-51.6Important 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 th

36、eLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed o

37、r are de feated. 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 herein may result in hazardous radiation exposure.!Please use enou

38、gh caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTCLASS 1 LASER PRODUCT LABEL REPRODUCTION AND POSITION OF LABELSWARNING LABEL(Inside)1-6 (No.MB112)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SE

39、RVICE INSTRUCTIONS.(No.MB112)1-7SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the metal cover (See Figs.1 to 4)(1) From the right and left sides of the main body, remove thefour screws A attaching the metal cover. (See Figs.1 and2.)(2) From the back side of the main body, remove the threescr

40、ews B attaching the metal cover. (See Fig.3.)(3) Lift the rear section of the metal cover in the direction of thearrow while extending the lower sections of the metalcover, release the claws a using a longer screwdriver fromthe inside as required. (See Fig.4.)Note:Do not damage any parts and boards

41、inside the main bodywhen releasing the joints a using a longer screwdriver.Fig.1Fig.2Fig.3Fig.4Metal coverAMetal coverAMetal coverRear panelBMetal coverClaws aClaws a1-8 (No.MB112)3.1.2Removing the front panel assembly (See Figs.5 and 6) Prior to performing the following procedures, remove the metal

42、cover.(1) From the top side of the main body, disconnect the parallelwires from the connectors (CN408,CN409) on the mainboard. (See Fig.5.)(2) Disconnect the card wires from the connectors (CN407,CN413) on the main board. (See Fig.5.) US/UW/UGversion(3) Disconnect the card wires from the connectors

43、(CN407,CN412) on the main board. (See Fig.5.) UJ version(4) Remove the screw C attaching the earth wire to the mainboard. (See Fig.5.)(5) From the bottom side of the main body, remove the threescrews D attaching the front panel assembly. (See Fig.6.)(6) Release the two hooks b and hook c from the bo

44、th andbottom sides of the main body, and remove the front panelassembly in the direction of the arrow. (See Figs.5 and 6.)Fig.5Fig.6CN407CN413CN409CN408Hook bHook bMain boardCCard wireEarth wireParallel wiresFront panel assemblyCard wireCN412Card wireHook cFront panelassemblyD(No.MB112)1-93.1.3Remov

45、ing the DVD changer mechanism assembly (See Fig.7) Prior to performing the following procedures, remove the metalcover and front panel assembly.(1) From the top side of the main body, disconnect the cardwires from the connectors (CN405,CN415) on the mainboard.(2) Remove the four screws E attaching t

46、he DVD changermechanism assembly to the bottom chassis.(3) Take out the DVD changer mechanism assembly in anupward direction.Note:When attaching the screw E, fit the hole of the DVD changermechanism assembly to the bosses d on the bottom chassis.Fig.73.1.4Removing the rear panel (See Fig.8) Prior to

47、 performing the following procedure, remove the metalcover.(1) From the back side of the main body, remove the screw F,ten screws G and three screws H attaching the rear panel.Fig.8Main boardBoss dBoss dCN405CN415Bottom chassisDVD changer mechanismassemblyCard wiresEEEFGGHHHRear panel1-10 (No.MB112)

48、3.1.5Removing the audio & digital input board (See Figs.9 and 10) Prior to performing the following procedures, remove the metalcover.(1) From the top side of the main body, disconnect the cardwire from the connector CN401 on the audio & digital inputboard. (See Fig.9.)(2) Remove the screw J attachi

49、ng the audio & digital inputboard. (See Fig.9.)(3) From the back side of the main body, remove the screw Kand three screws L attaching the audio & digital input boardto the rear panel. (See Fig.10.)(4) Take out the audio & digital input board from the mainbody.3.1.6Removing the tuner (See Figs.9 and

50、 10) Prior to performing the following procedures, remove the metalcover.(1) From the top side of the main body, disconnect the cardwire from the connector CN1 on the tuner. (See Fig.9.)(2) From the back side of the main body, remove the twoscrews M attaching the tuner to the rear panel. (SeeFig.10.