Jvc-THD-5-B-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2007 Victor Company of Japan, LimitedNo.MB6182007/7DVD DIGITAL CINEMA SYSTEMMB61820077SERVICE MANUALTH-D5B, TH-D5E, TH-D5EN, TH-D5EVCOPYRIGHT © 2007 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-195 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23XV-THD5SP-THD5WSP-THD5SSP-THD5CSP-THD5F1-2 (No.MB618)SPECIFICATIONCenter unit (XV-THD5)*1 Corresponding to Linear PCM Dolby Digital and DTS Digital Surround (with sampling frequency - 32 kHz 44.1 kHz 48 kHz)Output power Front 140 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Center 130 W RMS at 4 at 1 kHz with 10 % total harmonic distortion.Surround 130 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Subwoofer 140 W RMS at 4 at 100 Hz with 10 % total harmonic distortion.Audio section Digital Input*1 DIGITAL IN OPTICAL -21 dBm to -15 dBm (660 nm ±30 nm)Video section Video System PALHorizontal Resolution 500 linesSignal-to-Noise Ratio(Composite signal when “RGB” is selected)54 dBVideo Output Level (AV-Scart) Composite video 1.0 V(p-p)/75 YC1.0 V(p-p)/75 0.3 V(p-p)/75 RGB 0.7 V(p-p)/75 (VIDEO OUT) Component (Y): 1.0 V(p-p)/75 (PB/PR): 0.7V(p-p)/75Video Input Sensitivity/Impedance (VIDEO IN) Composite 1.0 V(p-p)/75 S-video (Y): 1.0 V(p-p)/75 (C): 0.3 V(p-p)/75 HDMI HDMI Output (MONITOR OUT) 576p/720p/1080iUSB storage USB Specification Compatible with USB 2.0 Full SpeedCompatible Device Mass Storage ClassCompatible File System FAT16, FAT32Bus Power Supply Max. 500 mATuner section Tuner Range FM 87.50 MHz to 108.00 MHzAM (MW) 522 kHz to 1 629 kHzGeneral Power Requirements AC 230 V , 50 HzPower Consumption 160 W (during operation)1.0 W (in standby mode)Dimensions (W × H × D) 435 mm × 115 mm × 270 mmMass 6.8 kg(No.MB618)1-3Subwoofer (SP-THD5W)Satellite speakersDesigns & specifications are subject to change without notice.Type Bass-Reflex TypeSpeaker 16 cm cone × 1Power Handling Capacity 140 WImpedance 4 Frequency Range 30 Hz to 200 HzSound Pressure Level 75 dB/WmDimensions (W × H × D) 353.5 mm × 351 mm × 174 mmMass 6.3 kgFront speakers (SP-THD5F)Type 1-Way Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone × 1Power Handling Capacity 140 WImpedance 4 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 80 dB/WmDimensions (W × H × D) 98.5 mm × 214.5 mm × 93.5 mmMass 1.0 kg eachCenter speaker (SP-THD5C)Type 1-Way 2-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone × 2Power Handling Capacity 140 WImpedance 4 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 84 dB/WmDimensions (W × H × D) 435 mm × 99 mm × 93.5 mmMass 2.0 kgSurround speakers (SP-THD5S)Type 1-Way Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone × 1Power Handling Capacity 140 WImpedance 4 Frequency Range 90 Hz to 20 000 HzSound Pressure Level 76 dB/WmDimensions (W × H × D) 98.5 mm × 214.5 mm × 93.5 mmMass 0.85 kg each1-4 (No.MB618)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.MB618)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 strapSolder short land section1-6 (No.MB618)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. WARNING LABEL and PRINT(No.MB618)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body3.1.1 Removing the METAL COVER (See Fig.1, 2)(1) Remove the four screws A attaching the METAL COVER.(See Fig.1)(2) Remove the one screw B attaching the METAL COVER byuse TORX driver. (See Fig.1)TROX driver: size T 10Parts number: DR-L70(3) Remove the two screws C attaching the both side of MET-AL COVER. (See Fig.2)Fig.1Fig.23.1.2 Removing the REAR PANEL (See Fig.3)(1) Remove the power cord from POWER BOARD assembly.(2) Remove the two screws D attaching the TUNER PACK andthen disconnect the card wire from connector CN205 of theMAIN BOARD assembly.(3) Remove the three screws E attaching the AMP BOARD as-sembly.(4) Remove the one screw F attaching the POWER BOARDassembly.(5) Remove the one screw G attaching the HDMI BOARD as-sembly.(6) Remove the six screws H attaching the each I/O jack.(7) Remove the one screw J attaching the REAR PANEL. Fig.3AABCEGFDCN205JH1-8 (No.MB618)3.1.3 Removing the AMP BOARD assembly (See Fig.4)(1) Disconnect the connector wire from POWER BOARD as-sembly connected to connector CN501 of the AMPBOARD assembly.(2) Remove the two screws K attaching the HEAT SINKBRACKET.(3) Remove the three screws L attaching the AMP BOARD as-sembly.(4) Disconnect the CONNECTION BOARD assembly con-nected connector CN504 of the AMP BOARD assembly.Fig.43.1.4 Removing the DVD MECHANISM assembly (See Fig.5)(1) Disconnect the connector wire from MAIN BOARD assem-bly connected to connector CN811 of the DVD BOARD as-sembly.(2) Disconnect the card wires from DVD BOARD assemblyconnected to connector CN201, CN202 and CN204 of theMAIN BOARD assembly.(3) Disconnect the card wire from DVD MECHANISM assem-bly connected to connector CN212 of the MAIN BOARDassembly.(4) Remove the one screw M attaching the DVD MECHANISMassembly.Fig.5KLCN504CN501CN201CN811CN212MCN204CN202(No.MB618)1-93.1.5 Removing the FRONT PANEL assembly (See Fig.6 to 8)(1) Disconnect the card wire from FRONT PANEL assemblyconnected to connector CN211 of the MAIN BOARD as-sembly. (See Fig.6)(2) Remove the one screw N attaching the EARTH WIRE fromFRONT PANEL assembly. (See Fig.6)(3) Remove the one screw P attaching the EARTH WIRE fromUSB BOARD assembly. (See Fig.6)(4) Remove the three screws Q attaching the FRONT PANELassembly. (See Fig.7).(5) Disengage hook a of bottom side and two hooks b of theboth side of FRONT PANEL assembly. (See Fig.7, 8)Fig.6Fig.7Fig.8CN211NPQhook ahook b1-10 (No.MB618)3.1.6 Removing the iPod BOARD assembly (See Fig.9)(1) Disconnect the card wire from iPod BOARD assembly con-nected to connector CN210 of the MAIN BOARD assem-bly.Fig.9CN210