JVC-XVSA72SL-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALDVD AUDIO/VIDEO PLAYERNo.A0022Oct. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.XV-SA70BK / XV-SA72SLXV-SA70BK/XV-SA72SLArea Suffix(XV-SA70BK)EN - Northern EuropeUJ - USA MilitaryArea Suffix(XV-SA72SL)B - U.K.E - Continental EuropeEN - Northern EuropeEE - Russian FederationUS - Sing

2、aporeUW - Brazil,Mexico,PeruThis service manual is printed on 100% recycled paper.ModelXV-SA70BKXV-SA72SLBody colorBlackSilverEach difference point VIDEO CD(For only Europe)(For only Asia)(This illustration is version EN)ContentsSafety precautions - 1-2Preventing static electricity - 1-3Precautions

3、for service - 1-4Important for laser products - 1-5Disassembly method - 1-6Adjustment method - 1-15Troubleshooting - 1-19Description of major ICs - 1-23Glossary of term and abbreviations - 1-44RadioFans.CN 收音机爱 好者资料库XV-SA70BK/XV-SA72SL1-21. This design of this product contains special hardware and m

4、any 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 qualifie

5、d 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 inj

6、ury 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 comp

7、onents 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 Manu

8、al. 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

9、 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 no

10、rmal, 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

11、 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 expos

12、ed 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.

13、 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 r

14、eturn 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

15、 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 main

16、s 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 attenti

17、on 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

18、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-SA72SL1-3Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity s

19、tored 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) i

20、n 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

21、 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

22、. 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

23、)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-

24、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

25、turn itConductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapXV-SA70BK/XV-SA72SL1-4Precautions for Service Handling of Traverse Unit and Laser Pickup 1. Do not touch any peripheral element of the pickup or the actuator.2. The traverse unit and the pickup are precision d

26、evices 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 th

27、e 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 th

28、e 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 electricity charged on clothingor the human body. Before repairing peripheral elements of the traverseunit or pickup, be

29、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 pick up is to be repaired, ground the sheet or the plate.3. After removing the flexible wire from the connector (CN101),

30、 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. After completing the repair, remove the solder to open the circuit.Please refer to Fig.5 of Disassemblymethod for details. Se

31、rvo controlboardShort circuitShort circuitXV-SA70BK/XV-SA72SL1-5Important 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 d

32、isassemble 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 de feated. It

33、 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 LABEL

34、and PRINTWARNING LABEL and PRINT!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTCAUTION: Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)ADVARSEL: Usynlig laser-s

35、trling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udst-telse for strling (d)VARNING: Osynlig laser- strlning nr denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s)VARO: Avattaessa ja suo-jalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. (

36、f)VIDEO OUTDIGITAL OUTVIDEORIGHTCOMPONENTS-VIDEOYPBPRPCM / STREAMCOAXIALOPTICALAV COMPU LINKLEFTFRONTREARRIGHTLEFTSUBWOOFERCENTERAUDIO OUTNTSCPALVIDEO OUTSELECTAC INXV-SA70BK/XV-SA72SL1-6Disassembly methodRemoving the top cover (see Fig.1)1.Remove the two screws A attaching the top coveron both side

37、s of the body.2.Remove the three screws B attaching the top coveron the back of body.3.Remove the top cover from the body by lifting therear panel of top cover.ATTENTION: Do not break the front panel tabfitted to the top cover.Removing the mechanism assembly (see Fig.3,4)*Prior to performing the fol

38、lowing procedure, removethe top cover.*There is no need to remove the front panel assembly.1.Remove the three screws D attaching the mechanismassembly on the bottom chassis.2.The servo control board is removed from the connectorCN512 and CN513 connected with the main boardrespectively.3.Remove the m

39、echanism assembly by lifting the rear partof the mechanism assembly.Removing the servo control board (see Fig.5)*Prior to performing the following procedure, removethe top cover and mechanism assembly.1.Disconnect the card wire from connector CN201 and CN202 on the servo control board respectively.2

40、.Disconnect the flexible wire from connector CN101on the servo control board from pick-up.ATTENTIONAt this time, please extract the wire after short-circuitedof two places on the wire in part a with solder. Please remove the solder two places of part a afterconnecting the wire with CN101 when reasse

41、mbling. 3.Two places in hook b are removed, the servo controlboard is lifted, and it is removed. Removing the surround audio board (see Fig.1,2)*Prior to performing the following procedure, removethe top cover.1.Disconnect the card wire from connector CN711 on the surround audio board.2.Remove the t

42、hree screws C attaching the surround audio board on the rear panel.3.The surround audio board is removed while picking up the point of the fastener in two places.DDDDFig.3CN513CN512Fig.4MechanismassemblyHook bMain boardServo controlboardHook bServo controlboardCN201Fig.5D DCN711CN711CN711CN3CN3CN3CN

43、3CN3CN3JT202JT202JT102JT102JT202JT202JT102JT102Fig.2FastenerFastenerSurroundSurroundaudio boardaudio boardSurroundaudio boardA x 2BFig.1BBCCCCN101CN202Part aPart aPart aXV-SA70BK/XV-SA72SL1-7Removing the rear panel (see Fig.6)Removing the front panel assembly (see Fig.7,8)Removing the main board (se

44、e Fig.9)*Prior to performing the following 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 attach

45、ing the front panel assembly on the bottom 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 performin

46、g the following procedure, remove 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.EEEEEEEEEEFig.6FGGHook cHook dHook dFi

47、g.7CN3JT202JT102CN3JT202JT102Fig.8CN3CN3Fig.9HHHHFootFootJT102JT202JT102JT202for Asiafor EuropeXV-SA70BK/XV-SA72SL1-8Remove 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

48、 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 front.1.2.Removing the tray (See Fig.2 and 3)When reattaching, fit the clamper to the two joints a.AT

49、TENTION: Before reattaching the tray, slide the part c of the slide cam to the right as shown in Fig.3.ATTENTION: Joint aJoint aAAAAFig.1Fig.2Fig.3PushbTrayClamper basePart cSlide camXV-SA70BK/XV-SA72SL1-9Prior to performing the following procedure, remove the clamper assembly and the tray.Remove th

50、e four screws B attaching the traverse mechanism assembly.1.Removing the traverse mechanism assembly (See Fig.4 and 5)Before reattaching the traverse mechanism assembly, pass the card wire extending from the spindle motor board through the notch d of the elevator.ATTENTION: Prior to performing the f