JVC-XVD723GD-cd-sm 电路图 维修手册.pdf
1-1 XV-D721BK XV-D723GD SERVICE MANUAL DVD AUDIO/VIDEO PLAYER No.A0002 Nov. 2000 XV-D721BK XV-D723GD Contents Safety Precautions Preventing static electricity Important for laser products Importance Admistering point on the Safety Disassembly method Adjustment method Description of major ICs 1-2 1-3 1-4 1-5 1-6 1-11 1-18 COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD. This service manual is printed on 100% recycled paper. XV-D721BK XV-D723GD Area Suffix XV-D721BK J C EG ES EN EE Area Suffix XV-D723GD A J EG ES EN UF U.S.A Canada Germany Spain Northern Europe Russian Federation US Minitary Australia U.S.A Germany Singapore Northern Europe China Brazil,Mexico,Peru RadioFans.CN 收音机爱 好者资料库 1-2 XV-D721BK XV-D723GD 1. 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 currnet 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 method Plug 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 eachexposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre 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 ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 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. RadioFans.CN 收音机爱 好者资料库 1-3 XV-D721BK XV-D723GD Preventing static electricity Electrostatic 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 electricity Static 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 workbench 1. 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 yourself 1. Use an anti-static wrist strap to release any static electricity built up in your body. 1.1.3. Handling the optical pickup 1. 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 testers 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 it Conductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap RadioFans.CN 收音机爱 好者资料库 Important for Laser Products 1.CLASS 1 LASER PRODUCT 2.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 the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. 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 LABELS WARNING LABEL CLASS 1 LASER PRODUCT CLASS 1 LASER PRODUCT ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. CAUTION- - LASER RADIATION WHEN OPEN. DO NOT STARE INTO BEAM. ATTENTION RAYONNEMENT LASER EN CAS DOUVERTURE. NE PAS REGARDER DANS LE FAISCEAU. - VORSICHTLASERSTRAHLUNG, WENN ABDECKUNG GEFFENET. NICHT IN DEN STRAHL BLICKEN. - ADVARSELLASERSTR LING VED BNING. SE IKKE IND I STR LEN. - ADVARSELLASERSTR LING N R DEKSEL PNES. STIRR IKKE INN I STR LEN. - VARNINGLASERSTR LNING NR DENNA DEL R PPNAD. STRRA EJ IN I STR LEN. VARO!AVATTAESSA OLET ALTTIINA LASERSTEILYLLE. L TUIJOTA STEESEEN. - - ANALOG DIGITAL FRONTCENTER SUBWOOFER PCM/STREAM AUDIO OUTAV COMPU LINK LEFT RIGHT LEFT RIGHT OPTICAL COAXIAL VIDEOS-VIDEO YPBPR SCAN MODE COMPONENT VIDEO OUT 525p525i 1 AC IN REAR 1-4 XV-D721BK XV-D723GD 1-5 XV-D721BK XV-D723GD XV-D721BK/XV-D723GD C/J ONLY Full Fuse Replacement Marking Graphic symbol mark (This symbol means fast blow type fuse.) should be read as follows ; FUSE CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ; F901 : 1.6 A / 125 V F901 : 1.6 A / 125 V XV-721BK/XV-723GD C/J SEULEMENT Marquage Pour Le Remplacement Complet De Fusible PRECAUTIONS SUR LES FUSIBLES POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, 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 ; Note : Its means J for U.S.A. market model and C for canada market model. Importance Admistering point on the Safety 1-6 XV-D721BK XV-D723GD Remove the four screws A on each side of the body. Remove the two screws B on the back of the body. Remove the top cover from behind in the direction of the arrow while pulling the lower part of the sides. 1. 2. 3. Disassembly method Removing the top cover (See Fig.1) Prior to performing the following procedure, remove the top cover. Remove the sixteen screws C on the back of the body. 1. Removing the rear panel (See Fig.2) Prior to performing the following procedure, remove the top cover. Removing the fitting (See Fig.3 to 5) Lower the mechanism by moving the lever marked a in the direction of the arrow from the upside of the body (Refer to Fig.3). Manually eject the loading tray toward the front. Remove the fitting from the loading tray by releasing the joints b on the both sides of the fitting. Push and return the loading tray. 1. 2. 3. 4. To remove the front panel assembly and the DVD mechanism assembly, remove the fitting in advance. ATTENTION: Fig.1 Fig.2 Fig.3 Fig.4Fig.5 Top cover Rear panel Lever a Loading tray Loading tray B CC A 2 A 2 C CCC Loading tray Fitting Joint b Joint b 1-7 XV-D721BK XV-D723GD Prior to performing the following procedure, remove the top cover and the fitting. Disconnect the card wire from connector CN818 on the regulator board. Turn back the body and remove the three screws D fixing the front panel assembly. Release the two joints c on both sides of the body and remove the front panel assembly toward the front. 1. 2. 3. Removing the front panel assembly (See Fig.6 to 9) Fig.6 Fig.7 Fig.8 Fig.9 Regulator board CN818 Front panel assembly Front panel assembly Joint c Joint c (Bottom) DD 1-8 XV-D721BK XV-D723GD Prior to performing the following procedure, remove the top cover and the fitting. It is not necessary to remove the front panel assembly. Disconnect the card wire from connector CN816 and the harness from CN817 on the regulator board. Disconnect the card wire from connector CN701 on the video board. Disconnect the card wire from CN831 on the DSP board. Remove the four screws E and the DVD mechanism assembly by pulling out from the front panel assembly backward. 1. 2. 3. 4. Removing the DVD mechanism (See Fig.10) Prior to performing the following procedure, remove the top cover. It is not necessary to remove the rear panel. Disconnect the card wire from connector CN816 and CN818 and the harnesses from CN815,CN817 and CN711 on the regulator board. Remove the three screws F attaching the regulator board. Remove the two screws C on the rear panel. 1. 2. 3. Removing the regulator board (See Fig.11 and 12) Fig.10 Fig.11 Fig.12 Video board CN701 Regulator board CN816 Regulator board DSP board CN831 DVD mechanism assembly CN817 CN816 CN711CN815 CN817 CN818 Rear panel EE E F F F CC E 1-9 XV-D721BK XV-D723GD Prior to performing the following procedure, remove the top cover. Removing the video board (See Fig.13 and 14) Disconnect the harnesses from the connector CN711 on the regulator board. Disconnect the card wire from connector CN701 on the video board. Remove the five screws C on the rear panel. 1. 2. 3. Removing the Audio board 1,2 and 3 / the Audio board (See Fig.13,15 and 16) It is not necessary to remove the rear panel.Ref. : Prior to performing the following procedure, remove the top cover and rear panel. Remove the three screws C attaching the audio board 1,2 and 3. Disconnect the audio board 1,2 and 3 from the audio board respectively. Disconnect the harnesses from connector CN815 on the regulator board. Disconnect the card wire from connector CN831 on the audio board. Remove the two screws G attaching the audio board. 1. 2. 3. 4. 5. Fig.13 Fig.14 Fig.15 Fig.16 Regulator boardVideo boardAudio board 3 Audio board 2 Audio board 1 Audio board 1 Audio board 2 Audio board 3 Audio board Audio board CN831 CN815 Rear panel CN711CN701 C C C G C CN831 1-10 XV-D721BK XV-D723GD Prior to performing the following procedure, remove the top cover and the DVD mechanism assembly. Removing the DVD servo board (See Fig.17) Turn over the DVD mechanism assembly and disconnect the card wire from connector CN102 and CN103 on the DVD servo board. Remove the two screws H attaching the DVD servo board. Move the DVD servo board in the direction of the arrow to release the two corner joints d. 1. 2. Removing the FL board / the power switch board (See Fig.18 and 19) Prior to performing the following procedure, remove the top cover and the front panel assembly. Remove the eight screws I and three screws J on the back of the front panel assembly. Remove the FL board and the power switch board at the same time. Disconnect the harness from connector CN903 on the FL board. 1. 2. Fig.17 Fig.18 Fig.19 DVD mechanism board CN103 Joint dJoint d CN102 DVD servo board FL board Power switch board Power switch board CN903FL board H II II J J H 1-11 XV-D721BK XV-D723GD Laser current conversion table Adjustment method This model has the TEST mode for simple diagnosis of the internal function. Use the TEST mode for diagnosing and checking the set as mentioned below. Details of the TEST mode The TEST mode comprises the five modes of the following. FL indication (*: numeral) 1.DVD AUDIO copyright protection key serial indication * Indicates the content of the DVD AUDIO copyright at shipment. Use this mode for checking it. 2.Microcomputers version number indication *_*_* Indicates the initial version number of the microcomputer at shipment. Use this mode for checking it. 3.Servo signal system check mode CHECK Use this mode for checking the laser
