Jvc-UXG-68-EV-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2007 Victor Company of Japan, LimitedNo.MB5952007/2MICRO COMPONENT SYSTEMMB59520072SERVICE MANUALUX-G68E,UX-G68EN,UX-G68EVCOPYRIGHT © 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-205 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21CA-UXG68SUPER VIDEOSP-UXG68SP-UXG681-2 (No.MB595)SPECIFICATIONCA-UXG68SP-UXG68 Design and specifications are subject to change without notice. Manufactured under license from Dolby Laboratories. “Dolby“, “Pro Logic“, “MLP lossless“, and the double-D symbol are trademarks of DolbyLaboratories. DTS and “DTS 2.0+ Digital Out“ are trademarks of Digital Theater Systems, Inc. Official DivX® Ultra Certified product “Plays all versions of DivX® video (including DivX® 6) with enhanced playback of DivX® media files and theDivX® Media Format“ “DivX, DivX Ultra Certified, and associated logos are trademarks of DivX, Inc. and are used under licence.“ USE OF THIS PRODUCT IN ANY MANNER THAT COMPLIES WITH THE MPEG-4 VISUAL STANDARD IS PROHIBITED, EXCEPT FOR USEBY A CONSUMER ENGAGING IN PERSONAL AND NON-COMMERCIAL ACTIVITIES. This product incorporates copyright protection technology that is protected by U.S. patents and other intellectual property rights. Use of this copy-right protection technology must be authorized by Macrovision, and is intended for home and other limited viewing uses only unless otherwiseauthorized by Macrovision. Reverse engineering or disassembly is prohibited.CONSUMERS SHOULD NOTE THAT NOT ALL HIGH DEFINITION TELEVISION SETS ARE FULLY COMPATIBLE WITH THIS PRODUCT.ANDMAY CAUSE ARTIFACTS TO BE DISPLAYED IN THE PICTURE. IN CASE OF 525 OR 625 PROGRESSIVE SCAN PICTURE PROBLEMS,.IT ISRECOMMENDED THAT THE USER SWITCH THE CONNECTION TO THE STANDARD DEFINITION“ OUTPUT. IF THERE ARE QUESTIONSREGARDING OUR TV SET COMPATIBILITY WITH THIS MODEL 525p AND 625p DVD PLAYER, PLEASE CONTACT OUR CUSTOMER SER-VICE CENTER.“Amplifier Output Power 120 W (60 W + 60 W) at 6 (10% THD)Audio Input AUX 500 mV/50 k (at “AUX LVL1“)250 mV/50 k (at “AUX LVL2“)125 mV/50 k (at “AUX LVL3“)Digital output DVD OPTICAL DIGITAL OUT : -21 dBm to -15 dBm (660 nm ±30 nm)Digital input USB MEMORYVideo Out Color system PAL (interlaced/progressive)Composite video 1 V(p-p)/75S-VIDEO Y (luminance) : 1 V(p-p)/75C (chrominance, burst) : 0.3 V(p-p)/75RGB 0.7 V(p-p)/75COMPONENT (Y) : 1 V(p-p)/75(PB/PR) : 0.7 V(p-p)/75Speaker impedance 6 - 16Tuner FM tuning range 87.50 MHz - 108.00 MHzAM (MW) tuning range 522 kHz - 1 629 kHzDisc/file player Playable disc DVD Video/DVD Audio/CD/VCD/SVCD/CD-R/CD-RW(CD/SVCD/VCD/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)DVD-R/-RW(DVD-VR/DVD Video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)+R/+RW (DVD Video/MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)DVD-ROM(MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX format)Playable file MP3/WMA/WAV/JPEG/MPEG-1/MPEG-2/ASF/DivX formatDynamic range 80 dBHorizontal resolution 500 linesWow and flutter ImmeasurableGeneral Power requirement AC 230 V , 50 HzPower consumption 125 W (at operation)13 W (at standby)1 W (at standby dimmer OFF mode)Dimensions (approx.) 170 mm × 250 mm × 342 mm (W/H/D)Mass (approx.) 5 kgSpeakers Speaker units Tweeter 4 cm cone × 1Woofer 12 cm cone × 1Impedance 6Dimensions (approx.) 145 mm × 250 mm × 195 mm (W/H/D)Mass (approx.) 2.2 kg each(No.MB595)1-3SECTION 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 TYPE1-4 (No.MB595)1.5 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 section(No.MB595)1-51.8 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 PRINT1-6 (No.MB595)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB595)1-7SECTION 3DISASSEMBLY3.1 Main body3.1.1 Removing the Metal cover (See Fig.1 and 2)(1) Remove the four screws A (both side) attaching the Metalcover. (See Fig.1)(2) Remove the two screws B attaching the Rear cover. (SeeFig.2)(3) Remove the five screws C attaching the Metal cover. (SeeFig.2)Fig.1Fig.2ABCCC1-8 (No.MB595)3.1.2 Removing the Front panel assembly (See Fig.3 to 5)(1) Disconnect the card wire from the FL board assembly con-nected to connector CN205 of the Micon board assembly.(See Fig.3)(2) Remove the two screws D attaching the Front panel as-sembly. (See Fig.4)(3) Disengage the hook a (Fig.4) and hook b (Fig.5) from thebottom chassis. (See Fig.4, 5)Fig.3Fig.4Fig.5CN205FL boardassemblyMicon boardassemblyHook aDDHook b(No.MB595)1-93.1.3 Removing the Fan (See Fig.6, 7)(1) Disconnect the connector wire from the Fan connected toconnector CN602 of the Audio board assembly. (See Fig.6)(2) Remove the two screws E attaching the Fan. (See Fig.7)3.1.4 Removing the Tuner pack (See Fig.7, 8)(1) Disconnect the card wire from the Tuner pack connected toconnector CN11 of the Micon board assembly. (See Fig.8)(2) Remove the two screws F attaching the Tuner pack. (SeeFig.7)Fig.6Fig.7Fig.8CN602EFTuner packCN111-10 (No.MB595)3.1.5 Removing the Audio board assembly (See Fig.9 to 11)(1) Disconnect the connector wire from the Power transformerconnected to connector CN601 of the Audio board assem-bly. (See Fig.9)(2) Disconnect the card wire from the USB jack board assem-bly connected to connector CN811 of the Audio board as-sembly. (See Fig.9)(3) Disconnect the card wire from the Audio board assemblyconnected to connector CN203 of the Micon board assem-bly. (See Fig.9)(4) Disconnect the card wire from Micon board assembly con-nected to connector CN217 of the Audio board assembly.(See Fig.9)(5) Disconnect the card wire from DVD mechanism assemblyconnected to connector CN722 of the Audio board assem-bly. (See Fig.9)(6) Disconnect the card wire from USB jack board assemblyconnected to connector CN810 of the Audio board assem-bly. (See Fig.9)(7) Disconnect the card wire from Micon board assembly con-nected to connector CN219 and CN220 of the Audio boardassembly. (See Fig.9)(8) Remove the two screws G attaching the Audio board as-sembly. (See Fig.9)(9) Remove the two screws H attaching the Power amplifierIC. (See Fig.10)(10) Remove the three screws J attaching the Amplifier boardassembly. (See Fig.11)Fig.9Fig.10Fig.11CN601CN811CN203CN217CN722CN810CN219CN220GGHJ