JVC-XVSA72SL-cd-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL DVD AUDIO/VIDEO PLAYER No.A0022 Oct. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. XV-SA70BK / XV-SA72SL XV-SA70BK/XV-SA72SL Area Suffix (XV-SA70BK) EN - Northern Europe UJ - USA Military Area Suffix (XV-SA72SL) B - U.K. E - Continental Europe EN - Northern Europe EE - Russian Fed

2、eration US - Singapore UW - Brazil,Mexico,Peru This service manual is printed on 100% recycled paper. Model XV-SA70BK XV-SA72SL Body color Black Silver Each difference point VIDEO CD (For only Europe) (For only Asia) (This illustration is version EN) Contents Safety precautions - 1-2 Preventing stat

3、ic electricity - 1-3 Precautions for service - 1-4 Important for laser products - 1-5 Disassembly method - 1-6 Adjustment method - 1-15 Troubleshooting - 1-19 Description of major ICs - 1-23 Glossary of term and abbreviations - 1-44 RadioFans.CN 收音机爱 好者资料库 XV-SA70BK/XV-SA72SL 1-2 1. This design of t

4、his 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 circuit

5、s. 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 ma

6、nufacture 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 nece

7、ssarily 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

8、 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 an

9、d 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 b

10、e 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, head

11、phone 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

12、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 p

13、er 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

14、 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

15、 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 criti

16、cal 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 ma

17、y 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 resis

18、tor ( ), 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) RadioFans.CN 收音机爱 好者资料库 XV-SA70BK/XV-SA72SL 1-3 Preventing static electric

19、ity 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

20、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) o

21、r 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 installati

22、on, 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

23、 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 s

24、pecific 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

25、 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 XV-SA70BK/XV-SA72SL 1-4 Precautions for Service Handling of Traverse Unit and Laser Pickup 1. Do not

26、 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

27、.) 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 po

28、wer 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 Electricity Laser diodes are easily destroyed by static elec

29、tricity charged on clothing or the human body. Before repairing peripheral elements of the traverse unit 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 which the traverse unit or the

30、 pick up is to be repaired, ground the sheet or 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 provided at the center of the flexible wire for the pickup. Af

31、ter completing the repair, remove the solder to open the circuit. Please refer to Fig.5 of Disassembly method for details. Servo control board Short circuit Short circuit XV-SA70BK/XV-SA72SL 1-5 Important for Laser Products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and i

32、nter 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 laser radiation and is equipped wit

33、h safety switches which prevent 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

34、performance of procedures other than those specified herein may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABEL and PRINT WARNING LABEL and PRINT ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. CLASS 1 LASER

35、 PRODUCT CAUTION: Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) ADVARSEL: Usynlig laser- strling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udst- telse for strling (d) VARNING: Osynlig laser- strlning nr denna del r ppnad och

36、 sprren r urkopplad. Betrakta ej strlen. (s) VARO: Avattaessa ja suo- jalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. (f) VIDEO OUTDIGITAL OUT VIDEO RIGHT COMPONENT S-VIDEO YPBPR PCM / STREAM COAXIALOPTICAL AV COMPU LINK LEFT FRONT REAR RIGHTLEFTSUBWOOFERCENTER AUDI

37、O OUT NTSCPAL VIDEO OUT SELECT AC IN XV-SA70BK/XV-SA72SL 1-6 Disassembly method Removing the top cover (see Fig.1) 1.Remove the two screws A attaching the top cover on both sides of the body. 2.Remove the three screws B attaching the top cover on the back of body. 3.Remove the top cover from the bod

38、y by lifting the rear panel of top cover. ATTENTION: Do not break the front panel tab fitted to the top cover. Removing the mechanism assembly (see Fig.3,4) *Prior to performing the following procedure, remove the top cover. *There is no need to remove the front panel assembly. 1.Remove the three sc

39、rews D attaching the mechanism assembly on the bottom chassis. 2.The servo control board is removed from the connector CN512 and CN513 connected with the main board respectively. 3.Remove the mechanism assembly by lifting the rear part of the mechanism assembly. Removing the servo control board (see

40、 Fig.5) *Prior to performing the following procedure, remove the top cover and mechanism assembly. 1.Disconnect the card wire from connector CN201 and CN202 on the servo control board respectively. 2.Disconnect the flexible wire from connector CN101 on the servo control board from pick-up. ATTENTION

41、 At this time, please extract the wire after short-circuited of two places on the wire in part a with solder. Please remove the solder two places of part a after connecting the wire with CN101 when reassembling. 3.Two places in hook b are removed, the servo control board is lifted, and it is removed

42、. Removing the surround audio board (see Fig.1,2) *Prior to performing the following procedure, remove the top cover. 1.Disconnect the card wire from connector CN711 on the surround audio board. 2.Remove the three screws C attaching the surround audio board on the rear panel. 3.The surround audio bo

43、ard is removed while picking up the point of the fastener in two places. D D D D Fig.3 CN513 CN512 Fig.4 Mechanism assembly Hook b Main boardServo control board Hook b Servo control board CN201 Fig.5 D D CN711CN711CN711 CN3CN3CN3 CN3CN3CN3 JT202JT202 JT102JT102 JT202JT202 JT102JT102 Fig.2 FastenerFa

44、stener SurroundSurround audio boardaudio board Surround audio board A x 2 B Fig.1 B B C C C CN101 CN202 Part aPart aPart a XV-SA70BK/XV-SA72SL 1-7 Removing the rear panel (see Fig.6) Removing the front panel assembly (see Fig.7,8) Removing the main board (see Fig.9) *Prior to performing the followin

45、g procedure, remove the top cover. 1.Remove the twelve screws E attaching the rear panel on the back of body. * Prior to performing the following procedure, remove the top cover. * There is no need to remove the mechanism assembly. 1.Remove the one screw F attaching the front panel assembly on the b

46、ottom chassis. 2.Remove the four screws G attaching the foot on the bottom chassis. 3.Disconnect the wire from CN3, JT102 and JT202 on the main board respectively. 4.Hook c and d are removed respectively, and the front panel assembly is removed. * Prior to performing the following procedure, remove

47、the top cover, surround audio board, mechanism assembly and rear panel. 1.Disconnect the wire from CN3, JT102 and JT202 and on the main board respectively. 2.Remove the four screws H attaching the main board on the bottom chassis. E E E E E E E EE E Fig.6 F G G Hook c Hook d Hook d Fig.7 CN3 JT202 J

48、T102 CN3 JT202 JT102 Fig.8 CN3CN3 Fig.9 H H H H Foot Foot JT102 JT202 JT102 JT202 for Asia for Europe XV-SA70BK/XV-SA72SL 1-8 Remove the four screws A attaching the clamper assembly. Move the clamper in the direction of the arrow to release the two joints a on both sides. 1. 2. Removing the clamper assembly (See Fig.1) Prior to performing the following procedure, remove the clamper assembly. Push b of the slide cam into the slot on the left side of the loading base until it stops. Draw out the tray toward the