JVC-THC6-ddcs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB4282005/7DVD DIGITAL CINEMA SYSTEMMB42820057TH-C6Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-305TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35Area suffixA - AustraliaUW - Brazil,Mexico,PeruUY - ArgentinaUJ - U.S.MilitaryUG - Turkey,South Africa,Egypt(XV-THC6)(SP-PWC6)(SP-THC6F)(SP-THC6F) (SP-THC6C)(SP-THC6S)RadioFans.CN 收音机爱 好者资料库1-2 (No.MB428)SPECIFIC

5、ATIONCenter unit (XV-THC9/XV-THC6/XV-THC3)*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)Subwoofer (SP-PWC6/SP-PWC3)Audio section Total Harmonic Distortion *

6、10.02%Digital input*2 DIGITAL IN (DBS)(OPTICAL)-21 dBm to -15 dBm(660 nm 30 nm)Video section Video SystemPAL/NTSCHorizontal Resolution500 linesSignal-to-Noise Ratio64 dBVideo output levelComposite: 1.0 V(p-p)/75 S-video-Y: 1.0 V(p-p)/75 S-video-C: For PAL: 0.3 V(p-p)/75 S-video-C: For NTSC: 0.286 V(

7、p-p)/75 Component-Y: 1.0 V(p-p)/75 Component-PB/PR: 0.7 V(p-p)/75 Video input sensitivity/Impedance (VCR IN) Composite: 1.0 V(p-p)/75 S-video-Y: 1.0 V(p-p)/75 S-video-C: For PAL: 0.3 V(p-p)/75 S-video-C: For NTSC: 0.286 V(p-p)/75 Tuner section Tuning Range FM87.5 MHz to 108.0 MHzAM (Except for Middl

8、e East) 531 kHz to 1 710 kHz (at 9 kHz channel spacing)530 kHz to 1 710 kHz (at 10 kHz channel spacing)AM (For Middle East)531 kHz to 1 602 kHz (at 9 kHz channel spacing)530 kHz to 1 600 kHz (at 10 kHz channel spacing)GeneralPower RequirementsAC 110-240 V , 50/60 HzPower Consumption19 W (at operatio

9、n)1.9 W (in standby mode)Dimensions (W H D)400 mm 85 mm 399 mmMass4.2 kgAmplifier section Front140W per channel, RMS at 4 at 1 kHz, with 10% total harmonic dis-tortion.Center/Surround130W per channel, RMS at 4 at 1 kHz, with 10% total harmonic dis-tortion.Subwoofer140 W, RMS at 4 at 100 Hz, with 10%

10、 total harmonic distortion.Speaker section Speaker unit16 cm Bass-reflexPower Handling Capacity140 WImpedance4 Frequency Range30 Hz to 200 HzGeneralPower Requirements Except for Australia AC 110 V/ AC 127 V/AC 220-240 V , 50/60 HzFor Australia onlyAC 240 V , 50 HzPower Consumption135 W (at operation

11、)0 W (in standby mode)Dimensions (W H D)169 mm 411 mm 459 mmMass11.3 kgRadioFans.CN 收音机爱 好者资料库(No.MB428)1-3Satellite Speakers (SP-XTHC6)Designs & specifications are subject to change without notice.Front speakers (SP-THC6F)Speaker unit5.5 cm 2, 1.5 cm, Bass-reflex, Magnetically ShieldedPower Handlin

12、g Capacity 140 WImpedance4 Frequency Range90 Hz to 20 kHzDimensions (W H D)250 mm 1 104 mm 250 mmMass2.6 kg eachCenter speaker (SP-THC6C)Speaker unit5.5 cm 2, 1.5 cm, Bass-reflex, Magnetically ShieldedPower Handling Capacity 140 WImpedance4 Frequency Range90 Hz to 20 kHzDimensions (W H D)320 mm 75 m

13、m 92 mmMass0.9 kgSurround speakers (SP-THC6S) Speaker unit5.5 cm 2, 1.5 cm, Bass-reflexPower Handling Capacity 140 WImpedance4 Frequency Range90 Hz to 20 kHzDimensions (W H D)250 mm 1 142 mm 250 mmMass2.6 kg each1-4 (No.MB428)SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product co

14、ntains 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. Services shoul

15、d 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 themanufacture of respons

16、ibility 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 necessarily be obtained by

17、 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 ( ) onthe Parts L

18、ist 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 dressed with ties,clam

19、ps, 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 confirmedthat they have bee

20、n 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 sure the productis

21、 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 exposed metal par

22、t 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. Connect a 1,500 1

23、0W 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 returnpath to the chas

24、sis, 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 international s

25、afety 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 mains voltage selec

26、tor 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 appearing on the silk

27、-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 specified by the manufac

28、turer. (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.MB428)1-51.5Preventing static electricityElectrostatic discharge (ESD), which occurs when static e

29、lectricity 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.1.5.1 Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (la

30、ser 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 pi

31、ckup) 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. Af

32、ter 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. 1.6Handling the traverse unit (optical pickup)(1) Do n

33、ot 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 p

34、in 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 i

35、t.1.7Attention 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

36、 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 strapCard wireDVD pickupDVD changer mechanism assemblyConnectorS

37、hort land section1-6 (No.MB428)1.8Important 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. Rep

38、lace 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 sa

39、fety 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 Invisib

40、le 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 nkymttmllelaserstei

41、lylle. 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 1LASER

42、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 alt

43、tiina 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 LABEL(No.MB428)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does

44、 not describe SPECIFIC SERVICE INSTRUCTIONS.1-8 (No.MB428)SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the metal cover (See Figs. 1 to 4)(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,

45、remove the threescrews 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 metal cov-er, release the seven claws a using a longer screwdriverfrom the inside as required. (See Fig. 4.)Note:Do not

46、 damage any parts and boards inside the main bodywhen releasing the claws a using a longer screwdriver. Fig.1Fig.2Fig.3Fig.4Metal coverAMetal coverAMetal coverBMetal coverClaws aClaws a(No.MB428)1-93.1.2Removing the front panel assembly (See Figs. 5 and 6) Prior to performing the following procedure

47、s, remove the metalcover.(1) From the top side of the main body, disconnect the parallelwires from the connectors (CN456, CN457) on the mainboard. (See Fig. 5.)(2) Disconnect the card wires from the connectors (CN450,CN460) on the main board. (See Fig. 5.)(3) Remove the screw C attaching the earth w

48、ires to the mainboard. (See Fig. 5.)Reference:When attaching the screw C, attach the earth wires withit. (See Fig. 5.)(4) From the bottom side of the main body, remove the threescrews D attaching the front panel assembly. (See Fig. 6.)(5) From the both and bottom sides of the main body, removethe fr

49、ont panel assembly in the direction of the arrow whilereleasing the joints b and c. (See Fig. 6.)Fig.5Fig.6CN456Main boardCCard wireCN460EarthwiresFront panel assemblyCN457Parallel wiresCN450Card wireDJoint cJoint bJoint bFront panel assembly1-10 (No.MB428)3.1.3Removing the DVD changer mechanism ass

50、embly (See Fig. 7) Prior to performing the following procedures, remove metalcover and front panel assembly.(1) From the top side of the main body, remove the screw E at-taching the wire protection board to the main board.(2) Take out the wire protection board, and disconnect thecard wires from the