Jvc-XVD-9000-Service-Manual电路原理图.pdf

SERVICE MANUALDVD AUDIO/VIDEO PLAYERNo.A0004Mar. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.XV-D9000XV-D9000Area SuffixJ - U.S.A.This service manual is printed on 100% recycled paper.ContentsSafety precautions - 1-2Preventing static electricity - 1-3Dismantling and assemblingthe traverse unit - 1-4Important for laser products - 1-5Importance admistering pointon the safety - 1-6Disassembly method - 1-7Method of initializing EEPROMand display of jitter value - 1-18Description of major ICs - 1-19XV-D90001-21. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual 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 is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassembling.5. Leakage current check (Electrical shock hazard testing)After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use 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 current from each exposed metal parts of the cabinet , particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.)Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.3. Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for local voltage.Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!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.XV-D90001-3Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.1. Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed. 1.1.1. Ground the workbench1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.1.1.2. Ground yourself1. Use an anti-static wrist strap to release any static electricity built up in your body. 1.1.3. Handling the optical pickup1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode. 1.2. 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 the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. 3. Handle the flexible cable carefully as it may break when subjected to strong force. 4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn itConductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapXV-D90001-4Short circuit landLaser pick-up unitFlexible cableShot with the clipShortingDismantling and assembling the traverse unit1. Notice regarding replacement of optical pickupElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs to the optical pickup or connected devices. (Refer to the section regarding anti-static measures.)1. Do not touch the area around the laser diode and actuator.2. Do not check the laser diode using a tester, as the diode may easily be destroyed.3. It is recommended that you use a grounded soldering iron when shorting or removing the laser diode. Recommended soldering iron: HAKKO ESD-compatible product4. Solder the land on the optical pickup's flexible cable.Note : Short the land after shorting the terminal on the flexible cable using a clip, etc., when using an ungrounded soldering iron. Note : After shorting the laser diode according to the procedure above, remove the solder according to the text explanation. XV-D90001-5Important for Laser Products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.3.CAUTION : There are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses 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 herein may result in hazardous radiation exposure.REPRODUCTION AND POSITION OF LABELSWARNING LABEL!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.XV-D90001-6Full Fuse Replacement MarkingGraphic symbol mark (This symbol means fast blow type fuse.)should be read as follows ;FUSE CAUTIONFOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;F9991 : 1.6 A / 250 VF9991 : 1.6 A / 250 VMarquage Pour Le Remplacement Complet De FusiblePRECAUTIONS SUR LES FUSIBLESPOUR UNE PROTECTION CONTINUE CONTRE DES RISQUES D'INCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.)doit etre interprete comme suit ;Importance Admistering point on the Safety XV-D90001-7CDisassembly methodRemoving the top panel(See Fig.1)1.Remove the eight screws A by hexagonal driverattaching the top panel.2.A top panel is lifted up and it is removed. Removing the side panel(See Fig.1)1.Remove the four screws B by hexagonal driverattaching the side panel.2.The left side also similarly removes the side panel. Removing the front panel assembly(See Fig.15)*Prior to performing the following procedure, removethe top panel.1.The bottom of the main body is done up. 2.A minus driver is inserted in the incision part at thecenter of the bottom, the bar in the interior of theincision part is moved in the direction of the arrow ofFigure 2, and the tray is drawn out forward. 3.Hook a which connects the tray covers to the tray isremoved by a minus driver etc. , the tray cover ispushed downward, and removes. 4.Remove the six screws C attaching the front panelassembly.5.The top of the main body is done up.6.Remove the eight screws D attaching the front panelassembly from the upper side of main body.7.Disconnect the wire from connector CN507 on the mainboard and CN981 on the power supply board.8.It comes off when the front panel assembly is drawn outforward. AABBTop panelSide panelFig.1Fig.4Incision partTrayFront panel assemblyFig.2Bottom plateBottom plateFig.3Hook aTray coverFront panel assemblyDCN507CN981Fig.5Power supplyboardMain boardXV-D90001-8Removing the rear cover(See Fig.68)*Prior to performing the following procedure,remove the top panel.1.Remove the eighteen screws E attaching therear cover from back of the main body.2.Remove the three screws F attaching thebottom plate from back of the main body.3.Solder on the power supply board is removedby three places.(See Fig.8) 4.Remove the two screws G attaching theAC socket and one screw G' attaching thepower supply board.Removing the main board(See Fig.8)*Prior to performing the following procedure,remove the top panel.1.Remove the four screws H attaching themain board.2.Disconnect the connector from CN101,CN103CN504,CN505,CN501,CN502,CN503,CN506CN507 on the main board.EEEEEEGG'Rear coverFig.6FBottom plateFig.7HCN103CN101CN504CN505CN501CN507CN509CN503CN502CN506Main boardFig.8Solder partsRear coverXV-D90001-9IIJKDVD Mechanismassembly coverFig.9Fig.10Fig.11DVD Mechanism assemblyRemoving the DVD mechanism assembly(See Fig.911)*Prior to performing the following procedure, removethe top panel and main board.1.Remove the four screws I attaching the DVDmechanism assembly cover, and DVD mechanismassembly cover lifted up and it is removed.2.The bottom of the main body is done up.3.Remove the four nut J attaching the DVD mechanismassembly 4.The top of the main body is done up.5.Remove the four screws K attaching the DVDmechanism assembly.6.It is removed while lifting the DVD mechanismassembly backward while noting the card wire. XV-D90001-10LCN722CN741CN751CN761 CN697CN721CN696CN695MNOAudio-analog(rear L/R)boardAudio-analog(front L/R)boardFig.12Fig.13Fig.14Signal processing boardRemoving the audio(rear L/R) board(See Fig.1213)*Prior to performing the following procedure, removethe top panel and rear cover.1.Remove the three screws L attaching theaudio(rear L/R) board.2.Remove the four screws M attaching theaudio(rear L/R) board from back of the body.3.Disconnect the card wire from CN761 andconnector from CN751 on the audio(rear L/R)board.4.Disconnect the connector from CN697 on theaudio power board.Removing the audio(front L/R) board(See Fig.14)*Prior to performing the following procedure, remove the top panel and rear cover.1.Remove the audio(rear L/R) board(upper step).2.Remove the two screws N of the pillar whichsupports audio(rear L/R) board(upper step).3.Remove the two screws O attaching theaudio(front L/R)board(lower step).4.Disconnect the connector from CN721 andCN722 on the audio signal(front) outputterminal.5.Disconnect the connector from CN695 andCN696 on the DVD audio power board.6.Disconnect the connector from CN741 on thesignal processing board.