JVC-DXT77-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2006 Victor Company of Japan, LimitedNo.MB5312006/6COMPACT COMPONENT SYSTEMMB53120066DX-T99A,DX-T99EE,DX-T99US,DX-T99UW,DX-T99UX,DX-T99UG,DX-T99UN,DX-T77EE,DX-T77US,DX-T77UW,DX-T77UX,DX-T77UY,DX-T77UG,DX-T77UN,DX-T66EE,DX-T66US,DX-T66UW,DX-T66UX,DX-T66UY,DX-T66UG,DX-T66UNLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-93DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-625TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65SUPER VIDEOCA-DXT66SP-DXT99WSP-DXT66FSP-DXT66FCA-DXT77SP-DXT77SSP-DXT77SSP-DXT99WSP-DXT99FSP-DXT99FSP-DXT77CSUPER VIDEOCA-DXT99SP-DXT99SSP-DXT99SSP-DXT99WSP-DXT99WSP-DXT99FSP-DXT99FSP-DXT99CSUPER VIDEORadioFans.CN 收音机爱 好者资料库1-2 (No.MB531)SPECIFICATIONDX-T99Amplifier sectionOutput PowerFRONT SPEAKERS150 W per channel, min. RMS, driven into 4 at 1 kHz with no more than 10% total harmonic distortion.CENTER SPEAKER140 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion.SURROUND SPEAKERS130 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion. (for austraria and russia)140 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion. (for asia)SUBWOOFERS150 W per channel, min. RMS, driven into 4 at 63 Hz with no more than 10% total harmonic distortion. (for austraria and russia)150 W per channel, min. RMS, driven into 4 at 1 kHz with no more than 10% total harmonic distortion. (for asia)Digital outputOPTICAL DIGITAL OUTPUT-21 dBm to -15 dBm (660 nm 30 nm)Audio input sensitivity/Impedance*AUX300 mV/47 kMIC 1/23.0 mV/50 kVIDEO OUTColor systemNTSC/PAL selectableVIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance)1 V(p-p)/75 C (chrominance, burst)NTSC : 0.286 V(p-p)/75 PAL : 0.3 V(p-p)/75 COMPONENT(Interlace/Progressive)(Y)1 V(p-p)/75 (PB/PR)0.7 V(p-p)/75 Speaker Terminals4 - 16 (front speakers/subwoofers)6 - 16 (surround/center speakers)Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM (MW) tuning range531 kHz - 1 710 kHz (for austraria)531 kHz - 1 710 kHz (at 9 kHz) (for asia)530 kHz - 1 710 kHz (at 10 kHz) (for asia)522 kHz - 1 629 kHz (for russia)Disc player sectionPlayable discDVD Video/DVD Audio/CD/VCD/SVCDCD-R/CD-RW (recorded in Audio CD/Video CD/Super Video CD for-mats and MP3/WMA/JPEG/MPEG-1/MPEG-2/ASF/DivX files)DVD-R (recorded in DVD Video format)DVD-RW (recorded in DVD Video format or DVD-VR format)Dynamic range80 dBHorizontal resolution500 linesWow and flutterImmeasurableCassette deck section Frequency response Normal (type I)50 Hz - 14 000 HzWow and flutter0.15% (WRMS)GeneralPower requirementAC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V , (adjustable with the voltage selector), 50 Hz / 60 HzPower consumption335 W (at operation)29 W (on standby)Dimensions (W/H/D) (approx.)185 mm 460 mm 361 mmMass (approx.)11.4 kgRadioFans.CN 收音机爱 好者资料库(No.MB531)1-3DX-T77Amplifier sectionOutput PowerFRONT SPEAKERS150 W per channel, min. RMS, driven into 4 at 1 kHz with no more than 10% total harmonic distortion.CENTER SPEAKER50 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion.SURROUND SPEAKERS50 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic distortion.SUBWOOFERS150 W per channel, min. RMS, driven into 4 at 1kHz with no more than 10% total harmonic distortion. (for asia)150 W per channel, min. RMS, driven into 4 at 63 Hz with no more than 10% total harmonic distortion. (for russia)Digital outputOPTICAL DIGITAL OUTPUT-21 dBm to -15 dBm (660 nm 30 nm)Audio input sensitivity/Impedance*AUX300 mV/47 kMIC 1/23.0 mV/50 kVIDEO OUTColor systemNTSC/PAL selectableVIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance)1 V(p-p)/75 C (chrominance, burst)NTSC : 0.286 V(p-p)/75 PAL : 0.3 V(p-p)/75 COMPONENT(Interlace/Progressive)(Y)1 V(p-p)/75 (PB/PR)0.7 V(p-p)/75 Speaker Terminals4 - 16 (front speakers/subwoofers)6 - 16 (surround/center speakers)Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM (MW) tuning range531 kHz - 1 710 kHz (at 9 kHz) (for asia)530 kHz - 1 710 kHz (at 10 kHz) (for asia)522 kHz - 1 629 kHz (for russia)Disc player sectionPlayable discDVD Video/DVD Audio/CD/VCD/SVCDCD-R/CD-RW (recorded in Audio CD/Video CD/Super Video CD for-mats and MP3/WMA/JPEG/MPEG-1/MPEG-2/ASF/DivX files)DVD-R (recorded in DVD Video format)DVD-RW (recorded in DVD Video format or DVD-VR format)Dynamic range80 dBHorizontal resolution500 linesWow and flutterImmeasurableCassette deck section Frequency response Normal (type I)50 Hz - 14 000 HzWow and flutter0.15% (WRMS)GeneralPower requirementAC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V , (adjustable with the voltage selector), 50 Hz / 60 HzPower consumption270 W (at operation)25 W (on standby)Dimensions (W/H/D) (approx.)185 mm 460 mm 361 mmMass (approx.)11.4 kg1-4 (No.MB531)DX-T66Amplifier sectionOutput PowerFRONT SPEAKERS150 W per channel, min. RMS, driven into 4 at 1 kHz with no more than 10% total harmonic distortion.SUBWOOFERS150 W per channel, min. RMS, driven into 4 at 1kHz with no more than 10% total harmonic distortion. (for asia)150 W per channel, min. RMS, driven into 4 at 63 Hz with no more than 10% total harmonic distortion. (for russia)Digital outputOPTICAL DIGITAL OUTPUT-21 dBm to -15 dBm (660 nm 30 nm)Audio input sensitivity/Impedance*AUX300 mV/47 kMIC 1/23.0 mV/50 kVIDEO OUTColor systemNTSC/PAL selectableVIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance)1 V(p-p)/75 C (chrominance, burst)NTSC : 0.286 V(p-p)/75 PAL : 0.3 V(p-p)/75 COMPONENT(Interlace/Progressive)(Y)1 V(p-p)/75 (PB/PR)0.7 V(p-p)/75 Speaker Terminals4 - 16 (front speakers/subwoofers)6 - 16 (surround/center speakers)Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM (MW) tuning range531 kHz - 1 710 kHz (at 9 kHz) (for asia)530 kHz - 1 710 kHz (at 10 kHz) (for asia)522 kHz - 1 629 kHz (for russia)Disc player sectionPlayable discDVD Video/DVD Audio/CD/VCD/SVCDCD-R/CD-RW (recorded in Audio CD/Video CD/Super Video CD for-mats and MP3/WMA/JPEG/MPEG-1/MPEG-2/ASF/DivX files)DVD-R (recorded in DVD Video format)DVD-RW (recorded in DVD Video format or DVD-VR format)Dynamic range80 dBHorizontal resolution500 linesWow and flutterImmeasurableCassette deck section Frequency response Normal (type I)50 Hz - 14 000 HzWow and flutter0.15% (WRMS)GeneralPower requirementAC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V , (adjustable with the voltage selector), 50 Hz / 60 HzPower consumption205 W (at operation)23 W (on standby)Dimensions (W/H/D) (approx.)185 mm 460 mm 361 mmMass (approx.)10.8 kg(No.MB531)1-5Speaker section* Measured at 1 kHz, with tape recording signal 300 mVDesign and specifications are subject to change without notice.Main SpeakersType3-Way 3-Speaker Bass Reflex (Magnetically-Shielded Type)Speaker systemsWoofer18 cm cone 1Mid6.5 cm cone 1Tweeter2 cm dome 1Power handling capacity150 WImpedance4 Frequency range35 Hz - 25 000 HzSound pressure level85 dB/WmDimensions (W/H/D) (approx.)204 mm 460 mm 273 mmMass (approx.)5.2 kg eachSubwooferType1-Way Bass-Reflex (Magnetically-Shielded Type)Speaker systems20 cm cone 1Power handling capacity150 WImpedance4 Frequency range35 Hz - 5 000 HzSound pressure level88 dB/WmDimensions (W/H/D) (approx.)238 mm 460 mm 273 mmMass (approx.)7.1 kg1-6 (No.MB531)SECTION 1PRECAUTION1.1Safety 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 aLeakage 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 0.15F 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 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.). 1.2Warning(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.1.3CautionBurrs 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-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.MB531)1-71.5Preventing 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 testers internal power source can easilydestroy the laser diode. 1.6Handling 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.1.7Attention 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 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 strapDVD changer mechanism assemblySwitch boardDVD traverse mechanism assemblyDVD servo board1-8 (No.MB531)1.8Importa