Jvc-XVSA-70-BK-Service-Manual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 pointVIDEO CD(For only Europe)(For only Asia)(This illustration is version EN)ContentsSafety precautions - 1-2Preventing static electricity - 1-3Precautions f

3、or 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 - 1-44XV-SA70BK/XV-SA72SL1-21. This design of this product contains special hardware and many circuits and compone

4、nts 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. Alte

5、rations 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 r

6、esulting 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

7、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 substit

8、ute 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 sepa

9、rated 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-assemblin

10、g.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 oper

11、ate 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

12、 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 r

13、esistor 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 chas

14、sis, 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

15、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

16、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 th

17、e 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 safet

18、y. 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-SA70BK/XV-SA72SL1-3Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discha

19、rged, 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

20、 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-

21、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 p

22、arts 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 (opt

23、ical 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 un

24、it. 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 sh

25、eet) or iron plate(caption)Anti-static wrist strapXV-SA70BK/XV-SA72SL1-4Precautions 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

26、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, remo

27、ve 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

28、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 prot

29、ection: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 c

30、lip.4. Short-circuit the laser diode by soldering the land which is providedat 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. Servo controlboardShort circuitShort circuitXV

31、-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 disassemble the Laser Unit. Replace the compl

32、ete 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

33、.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 and PRINTWARNING LABEL and PRINT!Please use e

34、nough 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-strling ved bning, nr sikkerhedsafbrydere er u

35、de 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. (f)VIDEO OUTDIGITAL OUTVIDEORIGHTCOMPONENTS-VI

36、DEOYPB PRPCM / STREAMCOAXIALOPTICALAV COMPU LINKLEFTFRONTREARRIGHT LEFTSUBWOOFER CENTERAUDIO OUTNTSC PALVIDEO OUTSELECTAC INXV-SA70BK/XV-SA72SL1-6Disassembly methodRemoving the top cover (see Fig.1)1. Remove the two screws A attaching the top coveron both sides of the body.2. Remove the three screws

37、 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 following procedure, removethe top cover

38、.*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 mechanism assembly by lifting the rear

39、 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 andCN202 on the servo control board respectively.2.Disconnect the flexible wire from con

40、nector 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 reassembling. 3.Two places in hook b are rem

41、oved, 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 three screws C attaching the surround

42、 audio board on the rear panel.3. The surround audio board is removed while picking up the point of the fastener in two places.DDFig.3CN513CN512Fig.4MechanismassemblyHook bMain board Servo controlboardHook bServo controlboardCN201Fig.5DCN711CN3CN3JT202JT102JT202JT102Fig.2FastenerFastenerSurroundaudi

43、o boardA x 2BFig.1BBCCCCN101CN202Part aXV-SA70BK/XV-SA72SL1-7Removing 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 following procedure, removethe top cover.1.Remove the twelve screws E attaching the rearpanel on t

44、he back of body.* Prior to performing the following procedure, removethe top cover.* There is no need to remove the mechanism assembly.1.Remove the one screw F attaching the front panelassembly on the bottom chassis.2.Remove the four screws G attaching the foot on the bottom chassis.3.Disconnect the

45、 wire from CN3, JT102 and JT202 onthe main board respectively.4.Hook c and d are removed respectively, and thefront panel assembly is removed. * Prior to performing the following procedure, removethe top cover, surround audio board, mechanismassembly and rear panel.1.Disconnect the wire from CN3, JT

46、102 and JT202 and on the main board respectively.2.Remove the four screws H attaching the main boardon the bottom chassis.EEEEEEEE EEFig.6FGGHook cHook dHook dFig.7CN3JT202JT102Fig.8CN3Fig.9HHHHFootFootJT102JT202for Asiafor EuropeXV-SA70BK/XV-SA72SL1-8Remove the four screws A attaching the clamper a

47、ssembly.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 s

48、tops.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.ATTENTION: Before reattaching the tray, slide the part c of the slide cam to the right as shown in Fig.3.ATTENTION: Joint aJoint aAAA AFig.1Fig.2Fig.3PushbTrayClamper basePart cSlide camXV-SA70BK/XV-SA72SL1-9Prior to performing the following procedure, remove the clamper assembly and the tray.Remove the four screws B attaching the traverse mechanism assembly.1.R