Jvc-THS-11-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2005 Victor Company of Japan, LimitedNo.MB4132005/6DVD DIGITAL THEATER SYSTEMMB41320056TH-S11Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-235 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25Area suffixC - Canada(SP-THS11F)(SP-THS11C)(SP-THS11S) (SP-WS11)(XV-THS11)1-2 (No.MB413)SPECIFICATIONCenter unit (XV-THS11)Front speakers (SP-THS11F)Center speaker (SP-THS11C)Audio section Front/Center/Surround 33 W per channel, RMS at 6 at 1 kHz,with 10% total harmonic dis-tortion.Subwoofer 40 W, RMS at 4 at 100 Hz, with 10% total harmonic distortion.Video section Video System NTSCHorizontal Resolution 500 linesSignal-to-Noise Ratio 64 dBVideo output level Composite 1.0 V(p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C 0.286 V(p-p)/75 Component(Interlace/Progressive)Y: 1.0 V(p-p)/75 PB/PR: 0.7 V(p-p)/75 CTuner section Tuning Range FM 87.5 MHz to 108.0 MHzAM 530 kHz to 1 710 kHzSpeaker impedance Front/Center/Surround 6 to 16 Subwoofer 4 to 16 General Power Requirements AC 120 V , 60 HzPower Consumption 135 W (at operation)1.3 W (in standby mode)Dimensions (W × H × D) 360 mm × 65 mm × 370 mmMass 5.3 kgType 1-Way Bass-Reflex Type(Magnetically-shielded Type)Speaker 8.0 cm cone × 1Power Handling Capacity 33 WImpedance 6 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 84 dB/W·mDimensions (W × H × D) 92 mm × 101 mm × 95 mmMass 0.58 kg eachType 1-Way Bass-Reflex Type(Magnetically-shielded Type)Speaker 8.0 cm cone × 1Power Handling Capacity 33 WImpedance 6 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 85 dB/W·mDimensions (W × H × D) 92 mm × 101 mm × 95 mmMass 0.65 kg(No.MB413)1-3Surround speakers (SP-THS11S)Subwoofer (SP-WS11)Designs & specifications are subject to change without notice.Type 1-Way Bass-Reflex TypeSpeaker 8.0 cm cone × 1Power Handling Capacity 33 WImpedance 6 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 82 dB/W·mDimensions (W × H × D) 92 mm × 101 mm × 95 mmMass 0.56 kg eachType 1-Way Bass-Reflex TypeSpeaker 15.0 cm cone × 1Power Handling Capacity 40 WImpedance 4 Frequency Range 40 Hz to 1 800 HzSound Pressure Level 84 dB/W·mDimensions (W × H × D) 129 mm × 284 mm × 337 mmMass 3.0 kg1-4 (No.MB413)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 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-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 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 necessarily 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 ( ) 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 dressed 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 confirmedthat 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 sure 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 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 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 resistorparalleled by a 0.15µF 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 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.). 1.2 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 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 provided, check setting for localvoltage.1.3 CautionBurrs 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.1.4 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 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. (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.MB413)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 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 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 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. 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 tester's 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, 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 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 adjusts the laser power. Do not turn it.1.7 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 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 mechanism assemblyDVD pickup1-6 (No.MB413)1.8 Importance administering point on the safetyCaution: For continued protection against risk offire, replace only with same type 3A/125V for F950.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F950 comme le meme type que 3A/125V.Ce sont des fusibles suretes qui functionnes rapide.3A-125VF950R990B955B952CN952B953CN951B950B954B951D957B957R952C950CN950B956D951C951B959EP950B965Q950Q951D956RY950S950T950B961D955B960Z952Z953C959C960C961C958B964B966FW953D958B969B967 B968B970D959B963HS950B971B972B973B974(No.MB413)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-8 (No.MB413)SECTION 3DISASSEMBLY3.1 Main body section3.1.1 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 cover 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.4.)Fig.1Fig.2Fig.3Fig.4AMetal coverAMetal coverB BBMetal coveraMetal covera(No.MB413)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 direction 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 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 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.MB413)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.)(4) Remove the three screws D attaching the DVD mechanismassembly to the chassis base. (See Fig.8.)3.1.4 Removing the HP terminal board (See Fig.8) Remove the metal cover.Reference:Remove the front panel assembly as required. (See 3.1.2 “Re-moving the front panel assembly“.)(1) From the top side of the main body, remove the screw E at-taching the HP terminal board to the chassis base.(2) Disconnect the card wires from the connectors CN510 onthe HP terminal board. (See Fig.8.)(3) Take out the HP terminal board from the main body.Reference:When attaching the HP terminal board, align the hole on theHP terminal board to the projection c of the chassis base be-fore attaching the screw E.Fig.83.1.5 Removing the rear panel (See Fig.9) Remove the metal cover.(1) From the back side of the main body, remove the strain re-lief attaching the power cord in the direction of the arrow.(2) Remove the eight screws F attaching the rear panel to themain body.(3) Release the joints d, and remove the rear panel from themain body.Fig.9HP terminal boardChassis baseCN405CN510CN403CN404Card wiresDVD mechanism assemblyEDcRear panelFFStrain reliefPower cordd d