JVC-UXG70-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2006 Victor Company of Japan, LimitedNo.MB5052006/6MICRO COMPONENT SYSTEMMB50520066UX-G70J,UX-G70C,UX-G70B,UX-G70E,UX-G70EN,UX-G70EV,UX-G70EELead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-94ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-325TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37CA-UXG70SUPER VIDEOSP-UXG70SP-UXG70RadioFans.CN 收音机爱 好者资料库1-2 (No.MB505)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier sectionOutput Power Northern america120 W per channel, min. RMS, driven into 6 at 1kHz with no more than 10% total harmonic distortion. (for northern america)Europe160 W (80 W+80 W) at 6 (10% THD) for europeAudio InputLINE IN500 mV/49 k (at L.IN LVL1)250 mV/49 k (at L.IN LVL2)125 mV/49 k (at L.IN LVL3)GAME IN (northern america)500 mV/49 kTV SOUND IN500 mV/49 kAudio Output LINE OUT1.0 Vrms (3 k) (at L.OUT LVL1)500 mVrms (1.5 k) (at L.OUT LVL2)SUBWOOFER OUT260 mVrms/3.9 kHEADPHONES OUT17 mW/32 Digital output DVD OPTICAL DIGITAL OUT -21 dBm to -15 dBm (660 nm 30 nm)USB inputUSB AUDIOVideo Output Color systemNTSC (interlaced/progressive) for northern americaPAL (interlaced/progressive) for europeVIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance) : 1 V(p-p)/75 C (chrominance, burst) : 0.286 V(p-p)/75 for northern americaC (chrominance, burst) : 0.3 V(p-p)/75 for europeRGB0.7 V(p-p)/75 for europeCOMPONENT(Y) : 1 V(p-p)/75 (PB/PR) : 0.75 V(p-p)/75 for northern america(PB/PR) : 0.7 V(p-p)/75 for europeSpeaker impedance6 - 16 Headphone impedance16 - 1 kTuner sectionFM tuning range87.5 MHz - 108.0 MHzAM tuning range530 kHz - 1 710 kHz for northern america522 kHz - 1 629 kHz fro europeDisc player section Playable discDVD Video/DVD Audio/CD/VCD/SVCDCD-R/CD-RW (CD/SVCD/VCD/MP3/WMA/JPEG format)DVD-R/-RW (DVD-VR/DVD Video/MP3/WMA/JPEG format)+R/+RW (DVD Video format)DVD-ROM (DVD Video format)Dynamic range80 dBHorizontal resolution500 linesWow and flutterImmeasurableGeneralPower requirementAC 120 V , 60 Hz for northern americaAC 230 V , 50 Hz for europePower consumption90 W (at operation) for northern america95 W (at operation) for europe14 W (at standby)1.0 W (at standby display OFF mode)Dimensions (approx.)(W/H/D)175 mm 250 mm 411 mm (6-9/10 inch 9-7/8 inch 16-1/5 inch)SpeakersSpeaker units Tweeter1.5 cm (5/8 inch) dome 1Squawker4 cm (1-5/8 inch) cone 1Woofer13.5 cm (5-3/8 inch) cone 1Impedance6 Dimensions (approx.) (W/H/D)166 mm 250 mm 232 mm (6-9/16 inch 9-7/8 inch 9-3/16 inch)Mass (approx.)2.8 kg (6.2 lbs) eachRadioFans.CN 收音机爱 好者资料库(No.MB505)1-3SECTION 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 TYPE1-4 (No.MB505)1.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in the original circuits.(2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must neverbe replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts inthe product have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother than specified by the manufacturer may not have the same safety characteristics as the recommended replacement partsshown in the Parts List of the Service Manual and may create shock, fire, or other hazards.(4) The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts,high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service isrequired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned tonormal, after re-assembling.1.5.1Warning(1) Service should be performed by qualified personnel only.(2) This equipment has been designed and manufactured to meet international safety standards.(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.(4) Repairs must be made in accordance with the relevant safety standards.(5) It is essential that safety critical components are replaced by approved parts.(6) If mains voltage selector is provided, check setting for local voltage.Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.(No.MB505)1-51.6Preventing 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.1.6.1 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. 1.7Handling 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.1.8Attention 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 strapCard wireDVD pickupDVD changer mechanism assemblyConnectorShort land section1-6 (No.MB505)1.9Importance administering point on the safetyD9013D9004D9022D9003D9014D9011D9023D9001C9023CN903D9002D9024C9005S9001C9013D9021C9003CN905C9011C9014D9012D9025C9024CN904C9002C9021C9012B9201C9004C9022T9000B9200C9001C9015C9025Q9031D9031C9031R9032D9032R9033R9031LF901CN901C9044D9040D9043D9044RY901R9046R9045R9044C9042Q9044D9042B9204D9045D9046D9047IC901D9048C9041C9045C9051B9106FT906FT908FT912FT910FT914FT902FT904FT903FT901B9950B9304B9500B9305FT911B9700FT909FT905FT907FT913B9203B9205Q9043B9303HS901B9600B9202B9502B9501B9302B9101B9100B9301B9300HS902B9104B9105B9900B9102B9103R9050C9052EP901C9043CN906Graphic symbol mark (This symbol means fast blow type fuse.)FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;should be read as follows ;F9001 : 6.3A 125VF9002 : 6.3A 125V F9003 : 3.15A 125VF9004 : 3.15A 125VF9006 : 2.5A 125VF9001 : 6.3A 125VF9002 : 6.3A 125V F9003 : 3.15A 125VF9004 : 3.15A 125VF9006 : 2.5A 125VFull Fuse Replacement MarkingFUSE CAUTIONLe symbole graphique (Ce symbole signifiefusible de type a fusion rapide.)POUR UNE PROTECTION CONTINUE CONTREDES RISQUES DINCENDIE, REMPLACERSEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Marquage Pour Le RemplacementComplet De FusiblePRECAUTIONS SUR LES FUSIBLESdoit etre interprete comme suit ;(No.MB505)1-71.10 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when open. Do not stare into beam. (Others) Visible and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure 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 able to 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 PRINT1-8 (No.MB505)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE IN