Jvc-XVFA-90-BK-Service-Manual电路原理图.pdf

SERVICE MANUALDVD AUDIO/VIDEO PLAYERNo.A0021Oct. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.XV-FA90BK / XV-FA92SLXV-FA95GDXV-FA90BK/XV-FA92SLXV-FA95GDArea Suffix (XV-FA90BK)J - U.S.A.C - CanadaArea Suffix (XV-FA92SL)C - CanadaArea Suffix (XV-FA95GD)J - U.S.A.This service manual is printed on 100% recycled paper.ModelXV-FA90BKXV-FA92SLXV-FA95GDBody colorBlackSilverGoldEach difference pointPlease pull out the AC plug code after the standby indicator lights pushing thepower supply button without fail after completing the repair. The mechanism becomes initialed position. There is a possibility to break when carrying in not initialed position the mechanismbut the state. ContentsSafety precautions - 1-2Preventing static electricity - 1-3Importance admisteringpoint on the safety - 1-4Precautions for service - 1-5Disassembly method - 1-6Adjustment method - 1-24Troubleshooting - 1-28Description of major ICs - 1-32Glossary of term and abbreviations - 1-53XV-FA90BK/XV-FA92SL/XV-FA95GD1-21. 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 manufacturers 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 re-assembling.5. Leakage current check (Electrical shock hazard testing)After re-assembling 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 mA AC (r.m.s.). 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.In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the “ “ mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J and C version)XV-FA90BK/XV-FA92SL/XV-FA95GD1-3Preventing 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-FA90BK/XV-FA92SL/XV-FA95GD1-4Full 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 ;F901 : 1.6 A / 125 V F901 : 1.6 A / 125 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 F901C902 C903C905 C906C907C908C909C910C913C914C915C917C918C919C951C960C961C962C963C964C965C966C967C968C969C970C971C972C973C978C979C981C982C984C987C989C992C993C994C995C996C997CN951CN952CP951D901D902D903D904D908D910D911B104B106D950D951D952D953D954D956 D957D958D960D972D973D974D991FC901FC902IC901IC951IC952J901K902L901L951L952L955L957L959PC901 PC902Q951Q952Q953Q991R900R901R902R903R904R905R906R907R908R910R911R952R953R955R956R960R961R963R965R969R973R974R975R976T901HS901HS952B701B320B101 B102B301B303B302B501B801B201B803 B804B305B304B802B306B307B308B309B503B311B504B310B502B205B314B202B313B203B312B316B103B341B204XV-FA90BK/XV-FA92SL/XV-FA95GD1-5Precautions for ServiceHandling of Traverse Unit and Laser Pickup1. Do not touch any peripheral element of the pickup or the actuator.2. The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.3. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.)4. To replace the traverse unit, pull out the metal short pin for protection from charging.5. When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center of the flexible wire to open the circuit.6. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.Do not change the setting of these half-fixed resistors for laser power adjustment.Destruction of Traverse Unit and Laser Pickup by Static ElectricityLaser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements of the traverseunit or pickup, be sure to take the following electrostatic protection:1. Wear an antistatic wrist wrap.2. With a conductive sheet or a steel plate on the workbench on whichthe traverse unit or the pick up is to be repaired, ground the sheetor the plate.3. After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.4. Short-circuit the laser diode by soldering the land which is providedat the two places of the flexible board for the pickup.After completing the repair, remove at the two places of the solder to open the circuit.Pickup unitFlexible boardLand (Soldering two places)Traverse mechanism unitFlexible wireMetal clipXV-FA90BK/XV-FA92SL/XV-FA95GD1-6Remove the four screws A on each side of the body.Remove the two screws B on the back of the body.Lift the rear part of the top cover and remove in the direction of the arrow while pulling both sides of the top cover outward.1.2.3.Disassembly methodRemoving the top cover (See Fig.1)Prior to performing the following procedure, remove the top cover.Disconnect the card wire from connector CN801 and CN803 on the servo control board, and CN951 on the power board respectively.Remove the three screws C on the upper side of the body.Remove the three screws D on the bottom of the body.Remove the front panel assembly toward the front.1.2.3.Removing the front panel assembly (See Fig.2 and 3)(Bottom)Top coverBFig.1A 2A 2Servo control boardCN801Front panel assemblyCPower boardCN951CN803DFront panel assemblyFig.2Fig.3XV-FA90BK/XV-FA92SL/XV-FA95GD1-7Prior to performing the following procedure, remove the top cover and the front panel assembly.Turn over the body and insert a screwdriver into the slot of the bottom chassis, then move it in the direction of the arrow in Fig.4. The main tray assembly will move forward.Draw the main tray assembly toward the front manually.Bring up the joint a over the boss of the loading base assembly, and remove the main tray assembly toward the front.Disconnect the card wire, on the back of the main tray assembly, from connector CN841 on the relay board 1.1.2.3.4.Removing the main tray assembly (See Fig.4 to 7)Main tray assemblyFig.4Fig.5Fig.6Fig.7Bottom chassis (slot)Bottom chassisMain tray assemblyMain tray assemblyLoading base assemblyRelay board 1CN841Joint aCard wireJoint aLoading base assemblyBossRelay board 1XV-FA90BK/XV-FA92SL/XV-FA95GD1-8Turn over the main tray assembly and pass the card wire extending from the photo sensor board through the notch b, in advance (Fig.8).From above the loading base assembly, turn the load base counterclockwise until the slide gear stops at the back end (Bring down the traverse mechanism assembly).Reattach the main tray assembly to the loading base assembly while fitting to the groove on the right and left sides of the loading base assembly.Connect the card wire through the notch b to connector CN841 on the relay board 1.Reattach the main tray assembly while fitting the slot c to the shaft.1.2.3.4.5.Reattaching the main tray assembly (See Fig.8 to 10)Main tray assemblyFig.8Fig.9Fig.10Loading base assemblyRelay board 1CN841Photo sensor boardNotch bSlide gearSlot cJoint aBossShaftLoad basePrior to performing the following procedure, remove the top cover, the front panel assembly and the main tray assembly.Disconnect the wire from connector CN808, CN809 and the card wire from CN210 on the servo control board respectively.Remove the seven screws E attaching the loading base assembly.1.2.Removing the loading base assembly(See Fig.11)Loading base assemblyEEEEServo control boardCN210CN808CN809EFig.11XV-FA90BK/XV-FA92SL/XV-FA95GD1-9Pull out the relay board 2 on the upper side of the body.Disconnect the wire from connector CN807, CN810 and CN901 on the servo control board respectively.Remove the screw I attaching the lug wire.Remove the three screws H attaching the servo control board.1.2.3.4.Servo control board Prior to performing the following procedure, remove the top cover.Remove the fourteen screws F attaching the rear panel.1.Removing the rear panel (See Fig.12)Prior to performing the following procedure, remove the top cover, the front panel assembly, the main tray assembly, rear panel and the loading base assembly.Removing each board (See Fig.13,14)Pull out the surround audio terminal board from connector CN763.Remove the screw G attaching the surround audio board.Pull out the surround audio board from connector CN754 and CN603.1.2.3.Surround audio board Pull out the relay board 2 on the upper side of the body.Remove the four screws J attaching the A/V output board.1.2.A/V output boardDisconnect the wire from connector CN952 and CN953 on the power board.Remove the four screws K on the upper side of the body.1.2.Power board Disconnect the wire from connector CN842 on the relay board 1.Remove the two screws I attaching the relay board.1.2.Relay board 1Fig.14Power boardKJJA/V output boardKRelay board 2Servo control