Jvc-THS-33-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB4452005/7DVD DIGITAL CINEMA SYSTEMMB44520057TH-S33Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-235 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25Area suffixA - Australia(XV-THS33)(SP-THS33C)(SP-THS33S)(SP-THS33F)(SP-WS33)1-2 (No.MB445)SPECIFICATIONCenter unit (XV-THS33)*1: For the countries of the Middle EastFront speakers (SP-THS33F) Center speake

5、r (SP-THS33C)Surround speakers (SP-THS33S)Audio section Front/Center/Surround 33 W per channel, RMS at 6 at 1 kHz,with 10 % total harmonic distortion.Subwoofer 40 W, RMS at 4 at 100 Hz, with 10% total harmonic distortion.Video section Video System PAL/NTSCHorizontal Resolution 500 linesSignal-to-Noi

6、se Ratio 64 dBVideo output level 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 For NTSC 0.286 V(p-p)/75 Component(Interlace/Progressive)Y: 1.0 V(p-p)/75 PB/PR: 0.7 V(p-p)/75 Tuner section Tuning Range FM 87.50 MHz to 108.00 MHzAM At 10 kHz intervals530 kHz to 1 710

7、kHz (*1:600 kHz)At 9 kHz intervals531 kHz to 1 710 kHz (*1:602 kHz)Speaker impedance Front/Center/Surround 6 to 16 Subwoofer 4 to 16 General Power Requirements AC 110 V/AC 127 V/AC 220 V/AC 230 - 240 V , 50/60 HzAC 240 V , 50 HzPower Consumption 100 W (at operation)4.8 W (in standby mode)Dimensions

8、(W H D) 360 mm 65 mm 370 mmMass 5.3 kgType 1-Way Bass-Reflex Type (Magnetically-shielded Type)Speaker 5.5 cm cone 1Power Handling Capacity 35 WImpedance 6 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 75 dB/WmDimensions (W H D) 230 mm 1 102 mm 260 mmMass 3.2 kg eachType 1-Way Bass-Reflex Ty

9、pe (Magnetically-shielded Type)Speaker 5.5 cm cone 2Power Handling Capacity 35 WImpedance 6 Frequency Range 95 Hz to 20 000 HzSound Pressure Level 81 dB/WmDimensions (W H D) 220 mm 84 mm 88.5 mmMass 0.97 kgType 1-Way Bass-Reflex Type(No.MB445)1-3Subwoofer (SP-WS33)Design and specifications are subje

10、ct to change without notice.Speaker 5.5 cm cone 1Power Handling Capacity 35 WImpedance 6 Frequency Range 105 Hz to 20 000 HzSound Pressure Level 75 dB/WmDimensions (W H D) 83 mm 131 mm 93.5 mmMass 0.50 kg eachType 1-Way Bass-Reflex TypeSpeaker 16.0 cm cone 1Power Handling Capacity 40 WImpedance 4 Fr

11、equency Range 30 Hz to 150 HzSound Pressure Level 75 dB/WmDimensions (W H D) 129 mm 284 mm 337 mmMass 3.3 kg1-4 (No.MB445)SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued p

12、rotection, 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-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product s

13、houldnot 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 personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical pa

14、rts 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 replacement components rated for higher voltage, watt-age, etc. Replacement parts which have th

15、ese 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 Service Manual. The use of a substitutereplacement which does not have the same safety chara

16、c-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, barriers and the like to be separated fromlive parts, high temperature parts, moving parts

17、 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 to normal, after reassem-bling.(5) Leakage shock hazard testingAfter reassembling the produc

18、t, always perform an isola-tion check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw he ads,headphone jack, control shafts, etc.) to be sure the productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this

19、 check. Plug the AC line cord directly into the AC outlet. Using a“Leakage Current Tester“, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not ex

20、ceed 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 resistorparalleled by a 0.1 5F AC-type capacitor between anexposed metal part and a known good ea

21、rth 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 measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat

22、each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standa

23、rds 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 provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left o

24、ver on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black su

25、ch 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. (This regulation dose not Except the J and C version)Good earth groundPlace this probe

26、on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE(No.MB445)1-51.5 Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the

27、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 (laser diode) in devices such as laser products. Be careful to use proper grounding in the area

28、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 electrici

29、ty 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.) D

30、o 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. 1.6 Handling the traverse unit (optical pickup)(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, comple

31、x 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

32、 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.1.7 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the

33、 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 solde

34、r from the short land sections after connecting the flexible wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapShort land sectionCard wireTraverse mechanism assemblypickup1-6 (No.MB445)1.8 Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisibl

35、e 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 lase

36、r 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

37、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

38、: Synlig ochosynling laserstrlning nr den ppnas och sprren rurkopplad. Betrakta ejstrlen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmllelasersteilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstrling nr maskinen e

39、rben 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 PRODUCTCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID

40、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 nkymttmllelasersteilylle. Vlt steenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig

41、og usynliglaserstrling nr maskinen erben eller interlocken fejeler.Undg direkte eksponering til strling. (d)WARNING LABEL(No.MB445)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-8 (No.MB445)SECTION 3DISASSEMBLY3.1 Main body section3.1.1

42、 Removing 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, remove the fivescrews B attaching the metal cover. (See Fig.3.)(3) Lift the rear section of the metal co

43、ver in the direction of thearrow while extending the lower sections of the metal cov-er, release the claws a using a longer screwdriver from theinside as required. (See Fig.4.)Note:Do not damage any parts and boards inside the main bodywhen releasing the claws a using the longer screwdriver. (SeeFig

44、.4.)Fig.1Fig.2Fig.3Fig.4AMetal coverAMetal coverB BBMetal coveraMetal covera(No.MB445)1-93.1.2 Removing the front panel assembly (See Figs.5 to 7) Remove the metal cover.(1) From the right side of the DVD mechanism assembly, pushthe slide cam and pull the tray assembly out of the mainbody in the dir

45、ection of the arrow. (See Fig.5.)(2) From the front side of the main body, remove the CD fittingassembly from the tray assembly in the direction of the ar-row and push in the tray assembly as before. (See Fig.6.)(3) From the top side of the main body, disconnect the cardwire from the connector CN400

46、 on the main board. (SeeFig.5.)(4) Disconnect the card wire from the connector CN510 on theHP terminal board. (See Fig.5.)(5) From the bottom side of the main body, remove the threescrews C attaching the front panel assembly. (See Fig.7.)(6) From both sides and back side of the main body, removethe

47、front panel assembly in the direction of the arrow whilereleasing the joints b. (See Fig.7.)Fig.5Fig.6Fig.7Slide camDVD mechanismassemblyTray assemblyFront panel assemblyCN510HP terminal boardCN400Main boardDVD mechanism assemblyFront panel assemblyCD fitting assemblyb bCFront panel assembly1-10 (No

48、.MB445)3.1.3 Removing the DVD mechanism assembly (See Figs.5,6 and 8) Remove the metal cover.(1) From the right side of the DVD mechanism assembly, pushthe slide cam and pull the tray assembly out of the mainbody in the direction of the arrow. (See Fig.5.)(2) From the front side of the main body, remove the CD fittingfrom the tray assembly in the direction of the arrow andpush in the tray assembly as before. (See Fig.6.)(3) From the top side of the main body, disconnect the cardwires from the connectors CN403 to CN405 on the mainboard. (See Fig.8.