Jvc-THC-90-US-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2006 Victor Company of Japan, LimitedNo.MB5702006/9DVD DIGITAL CINEMA SYSTEMMB57020069TH-C90A,TH-C90US,TH-C90UX,TH-C90UG,TH-C60US,TH-C60UP,TH-C60UW,TH-C60UX,TH-C60UY,TH-C60UGLead 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-395 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43XV-THC90SP-PWC90SP-THC90F SP-THC90FSP-THC90CSP-THC90S SP-THC90SXV-THC60SP-PWC60SP-THC60F SP-THC60FSP-THC60CSP-THC60S1-2 (No.MB570)SPECIFICATIONCenter unit (XV-THC90/XV-THC60)*1: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz)*2: For the countries of the Middle EastSubwoofer (SP-PWC90)Subwoofer (SP-PWC60)Audio section Digital input*1 DIGITAL IN (DBS) (OPTICAL) -21 dBm to -15 dBm (660 nm ±30 nm)Analog input AUX IN (VCR)TAPE IN (Only for XV-THC90)Analog output TAPE OUT (Only for XV-THC90)Video section Video System PAL/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 For PAL: 0.3 V(p-p)/75 For NTSC: 0.286 V(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 For NTSC: 0.286 V(p-p)/75 USB storage USB specification Compatible with the USB 2.0 Full-SpeedCompatible device Mass Storage ClassCompatible file system FAT16, FAT32Bus power supply Max. 500 mATuner section Tuning Range FM 87.50 MHz to 108.00 MHzAM At 10 kHz intervals : 530 kHz to 1 710 kHz (1 600 kHz)*2At 9 kHz intervals : 531 kHz to 1 710 kHz (1 602 kHz)*2General Power Requirements AC 110 - 240 V , 50/60 Hz (For US, UG, UX)AC 240 V , 50 Hz (For A)AC 110-240 V , 50/60 Hz (For UW)Power Consumption 25 W (at operation), 1.2 W (in standby mode)Dimensions (W × H × D) 400 mm × 85 mm × 316 mmMass 3.8 kgAmplifier section Front/Center/Surround 140 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion.Subwoofer 300 W, RMS at 4 at 40 Hz, with 10 % total harmonic distortion.Speaker section Speaker unit 25 cm Bass-reflexPower Handling Capacity 300 WImpedance 4 Frequency Range 25 Hz to 200 HzSound Pressure Level 74 dB/W·mGeneral Power Requirements AC 110 V/ AC 127 V/ AC 220 - 240 V , 50/60 HzPower Consumption 110 W (at operation), 0 W (in standby mode)Dimensions (W × H × D) 264 mm × 481 mm × 459 mmMass 17.6 kgAmplifier section Front/Center/Surround 135 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion.Subwoofer 135 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.Speaker section Speaker unit 16 cm Bass-reflexPower Handling Capacity 140 WImpedance 4 Frequency Range 30 Hz to 200 HzSound Pressure Level 75 dB/W·mGeneral Power Requirements AC 110 V/ AC 127 V/ AC 220 - 240 V , 50/60 HzPower Consumption 135 W (at operation), 0 W (in standby mode)Dimensions (W × H × D) 171 mm × 411 mm × 458 mmMass 12.3 kg(No.MB570)1-3Satellite Speakers (SP-XTHC90)Satellite Speakers (SP-XTHC60)Designs & specifications are subject to change without notice.Front speakers (SP-THC90F) Type 2-way 3-speaker Bass reflex type (Magnetically shielded Type)Speaker 13.5 cm cone × 2, 6.0 cm cone × 1Power Handling Capacity 140 WImpedance 4 Frequency Range 60 Hz to 20 000 HzSound Pressure Level 89 dB/W·mDimensions (W × H × D) 270 mm × 1 027.5 mm × 320 mmMass 8.8 kg eachCenter speaker (SP-THC90C) Type 2-way 3-speaker Bass reflex type (Magnetically shielded Type)Speaker 10.5 cm cone × 2, 4.0 cm cone × 1Power Handling Capacity 140 WImpedance 4 Frequency Range 65 Hz to 20 000 HzSound Pressure Level 89 dB/W·mDimensions (W × H × D) 400 mm × 141 mm × 171.5 mmMass 3.8 kgSurround speakers (SP-THC90S) Type 2-way Bass reflex typeSpeaker 10.5 cm cone × 1, 4.0 cm cone × 1Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 81 dB/W·mDimensions (W × H × D) 140 mm × 228.5 mm × 174 mmMass 1.7 kg eachFront speakers (SP-THC60F) Type 1-way 2-speaker Bass reflex type (Magnetically shielded Type)Speaker 5.5 cm cone × 2Power Handling Capacity 140 WImpedance 4 Frequency Range 100 Hz to 20 000 HzSound Pressure Level 79 dB/W·mDimensions (W × H × D) 280 mm × 1 106 mm × 280 mmMass 3.3 kg eachCenter speaker (SP-THC60C) Type 1-way 2-speaker Bass reflex type (Magnetically shielded Type)Speaker 6.5 cm cone × 2Power Handling Capacity 140 WImpedance 4 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 82 dB/W·mDimensions (W × H × D) 250 mm × 85 mm × 91 mmMass 0.8 kgSurround speakers (SP-THC60S) Type 2-way 3-speaker Bass reflex typeSpeaker 5.5 cm cone × 2, 3.0 cm dome × 1Power Handling Capacity 140 WImpedance 4 Frequency Range 100 Hz to 20 000 HzSound Pressure Level 79 dB/W·mDimensions (W × H × D) 280 mm × 1 114 mm × 280 mmMass 3.4 kg each1-4 (No.MB570)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.MB570)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 card wire is disconnected from the connecto on the servo board. (If the card wireis 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 card wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapDouble Soldering pointMotorface tapeCard wire1-6 (No.MB570)1.8 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. Do not stare into beam.(Others) Visible and/or invisible class 1M laser radiationwhen open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation whenopen and inter lock failed or defeated. Avoid directexposure to beam.4.CAUTION : This laser product uses visible and/or 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 safety switches.5.CAUTION : If safety switches malfunction, the laser is ableto 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 LABELS and PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck. CLASS 1LASER PRODUCTWARNING LABEL and PRINTCLASS 1LASER PRODUCT(No.MB570)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONS2.1 Extension cable for subwooferPlease use the extension cable described to Service Bulletin (No. MB-SB-00018-2) when you service.It is an extension cable for the subwoofer.Parts No. Parts name Amount usedEXTPWC5-14P Extension cable 2EXTPWM505-09P Extension cable 1Amp. boardMother board1-8 (No.MB570)SECTION 3DISASSEMBLY3.1 Main body3.1.1 Removing the Metal cover (See Fig. 1, 2)(1) Remove the three screws A attaching the Metal cove fromback side. (See fig. 1)(2) Remove the four screws B attaching the Metal cover fromboth side. (See Fig. 2)Fig.1Fig.2ABB(No.MB570)1-93.1.2 Removing the Front panel assembly (See Fig. 3 to 5)(1) Disconnect the card wires from Front panel assembly con-nected to connectors CN450, CN457, CN455 and CN451of the main board assembly. (See Fig. 3)(2) Remove the one screw C attaching the earth wire to Mainboard assembly. (See Fig. 3)(3) Remove the two screws D attaching the Front panel as-sembly from bottom side. (See Fig. 4)(4) Disengage the hook a from the bottom chassis. (See Fig.4)(5) Disengage the hook b and c from the both side of the bot-tom chassis. (See Fig. 5)Fig.3Fig.4Fig.5CN450CN457CN455CN451CDabc1-10 (No.MB570)3.1.3 Removing the Audio & Digital input board assemb