JVC-MXDVA5-cs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOMPACT COMPONENT SYSTEMNo.21032Sep. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.MX-DVA5MX-DVA5ContentsSafety PrecautionsImportant for laser productsPreventing static electricityImportance administering point on the safety ?Disassembly methodWiring connectionAdjustment methodTroubl

2、eshootingDescription of major ICs1-21-31-41-51-61-181-191-231-2639CD / DVD Mechanism is exchanged by a unit (contain CPC cords). Area suffix J - U.S.A.C - CanadaSP-MXDVA5SP-MXDVA5CA-MXDVA5CLOCK/TIMERDISPLAYPHONESREPEATSELECTREC START/STOPCDREC STARTDUBBINGTUNINGTAPE BDISC CHANGESOUNDMODESUBWOOFERLEV

3、ELTAPE ASTANDBY/ONSTANDBYCOMPACTDIGITAL VIDEOCD-R/RW PLAYBACK/TentativeRadioFans.CN 收音机爱 好者资料库MX-DVA51-21. 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

4、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 sh

5、ould 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 charact

6、eristics. 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

7、 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

8、 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

9、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

10、 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 l

11、ine 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.)

12、.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.Mea

13、sure 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 meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each meas

14、urement. 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

15、.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 VOLTMET

16、ER(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 s

17、ide (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. (Exce

18、pt the J and C version)RadioFans.CN 收音机爱 好者资料库MX-DVA51-3Important 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 disassemb

19、le 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 danger

20、ous 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 labelsWARNING LA

21、BEL!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTMX-DVA51-4Preventing static electricity1. Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity

22、 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.2. About the earth processing for the destruction prevention by static electricity In the equipment which uses optical pick-up (laser

23、diode), optical pick-up is destroyed by the static electricity of the work environment.Be careful to use proper grounding in the area where repairs are being performed. 2-1 Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it b

24、efore placing the traverse unit (optical pickup) on it.2-2 Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. 3. Handling the optical pickup1. In order to maintain quality during transport and before installation, both sides of the laser diode on

25、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. 4. Ha

26、ndling 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

27、 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 resist

28、or that adjusts the laser power. Do not turn it.Conductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapAttention when traverse unit is decomposedBecause the CD / DVD mechanism assembly of this model is a unit component, the individual component parts consisting of the CD

29、 / DVD mechanism assembly are not supplied separately.If you need to decompose the traverse unit, short-circuit the connector of the flexible board by using a metal clip and the like prior to decomposing the traverse unit.CD / DVD holder mechanismCD / DVD changer unitPickup unitconnectorSolderingpoi

30、ntsCard wireFig.1Fig.2MX-DVA51-5Caution: For continued protection against risk offire, replace only with same type 5A/125V forF001, 4A/125V for F101,F102,F103, and F104. This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F001 c

31、omme le meme typeque 5A/125V, et 4A/125V pour F101,F102,F103,et F104.Ce sont des fusibles suretes qui functionnes rapide.Importance administering point on the safety Secondary partsPrimary partF001F102F101F103F104MX-DVA51-6Remove the three screws A attaching the metal cover on the back of the body.

32、Remove the six screws B attaching the metal cover on both sides of the body.Remove the metal cover from the body by lifting the rear part of the cover.1.2.3.Disassembly methodRemoving the metal cover (See Fig.1 and 2)Do not break the front panel tab fitted to the metal cover.ATTENTION: Prior to perf

33、orming the following procedure, remove the metal cover.Disconnect the card wire which is attached with adhesive to the left side of the CD / DVD changer unit.Disconnect the harness from connector ACW1,DCW4 and VCW1 of the CD / DVD servo board on the back of the CD / DVD changer unit.Disconnect the h

34、arness from connector LCW2 and LCW6 on the DVD power board.Disconnect the card wire from connector UCW3 on the FL dispaly & System control board.Remove the two screws C attaching the CD / DVD changer unit on the back of the body. Remove the two screws D attaching the CD / DVD changer unit on the bot

35、h side of the body.Draw the CD / DVD changer unit upward from behind while pulling the rear panel outward. 1.2.3.4.5.6.7.Removing the CD / DVD changer unit (See Fig.3 to 6)Fig.1Fig.2Fig.3Metal coverAAAMetal coverBBRear panelFront panel assemblyCD / DVD servo boardCD / DVD changer unitLCW6LCW2DCW4 /

36、VCW1DVD power boardACW1MX-DVA51-7Prior to performing the following procedure, remove the metal cover and the CD / DVD changer unit.Disconnect the card wire from connector FCW3 and the harness from connector JCW1, JCW2 and HCW3 on the inner side of the main board in the body.Remove the two screws E a

37、ttaching the front panel assembly on both sides of the body.Remove the screw F attaching the earth terminal extending from the cassette mechanism assembly. Remove the screw G attaching the front panel assembly and main board.Remove the screw H attaching the front panel assembly on the bottom of the

38、body.Release the two joints a on both sides and two joints b on the bottom of the body using a screwdriver. 1.2.3.4.5.6.Removing the front panel assembly (See Fig.7 to 9 )Rear panelCDDRear panelRear panelFront panel assemblyAdhesive card wire strapCD / DVD changer unitCD / DVD changer unitFig.7Main

39、boardFCW3JCW2JCW1HCW3Front panel assemblyJoint aearth wireEFFig.4Fig.5Fig.6aFig.6bUCW3Front panel assemblyFL dispaly & system control boardMX-DVA51-8Prior to performing the following procedure, remove the metal cover and the CD / DVD changer unit.Remove the four screws I attaching the heat sink cove

40、r on the back of the body. Remove the heat sink cover.Remove the four screws J attaching the heat sink, amp. board and DVD power board to the rear panel on the back of the body. Remove the two screws K attaching the speaker terminal to the rear panel on the back of the body. Disconnect the card wire

41、 from connector ACW1 and the harness from connector ACW2 on the amp. board. Disconnect the harness from connector LCW5 and LCW4 on the DVD power board. After moving the heat sink upward, remove the claws. Then pull out the heat sink, amp. board and DVD power board inward.1.2.3.4.5.6.Removing the hea

42、t sink, amp. board and DVD power board (See Fig.10 to 12)Fig.8Fig.9Front panel assemblyGEMain boardHJoint bJoint bJoint cBottom sideFig.10Fig.11Rear panelHeat sink coverHeat sink Speaker terminal Tuner terminal KLIIJJFig.12ACW1Rear panelAmp. boardACW2LCW5LCW4DVD power boardMX-DVA51-9Prior to perform

43、ing the following procedure, remove the metal cover and CD / DVD changer unit.Disconnect the card wire from connector CON01 on the tuner board.Remove the two screws L attaching the tuner board. 1.2.Removing the tuner board(See Fig.11 and 13)Prior to performing the following procedure, remove the met

44、al cover, CD / DVD changer unit, heat sink & Amp. board and tuner board.Remove the three screws N and five screws M attaching the rear panel.Removing the rear panel (See Fig.14)1.Prior to performing the following procedure, remove the metal cover, CD / DVD changer unit, heat sink & Amp. board tuner

45、board and rear panel.Disconnect the card wire from connector FCW3 and the harness from connector JCW1, JCW2, and HCW3 on the main board. Disconnect the harness from connector PCW1 on the power transformer board.Remove the screw G attaching the main board holder. (See Fig.8)Remove the two screws O at

46、taching the heat sink and bottom chassis. 1.2.3.4.Removing the main Board (See Fig. 15)Main boardTuner boardCON01NFig.14Rear panelFig.13MFig.15Power transformer boardOFCW3JCW2 JCW1HCW3PCW1Main boardRear panelMX-DVA51-10Prior to performing the following procedure, remove the metal cover, CD / DVD cha

47、nger unit, heat sink, amp. board and DVD power board.Remove the four screws P attaching the power ICs to the heat sink.Unsolder the power ICs solder point.Remove the three screws Q and three screws R attaching the DVD power board to the heat sink.1.2.3.Removing the power ICs and DVD power board (See

48、 Fig.16 to 18)Prior to performing the following procedure, remove the metal cover, CD / DVD changer unit, heat sink & Amp. board, tuner board and rear panel.Disconnect the power cord from connector RCW2 of the power transformer board.Disconnect the harness from connector PCW1 of the power transforme

49、r board.Remove the four screws S attaching the power transformer.1.2.3.Removing the power transformer (See Fig .19)Fig.18Fig.16PHeat sinkAmp. boardHeat sinkPower ICs solder pointFig.19SQPower cordRCW2PCW1Power transformer DVD power boardFig.17DVD power boardAmp. boardRSHeat sinkMX-DVA51-11Disconnect

50、 the card wire from the connector UCW3, UCW4,UCW5 and UCW6 on the FL display & System control board.Remove the five screws U attaching the FL display & System board. Disconnect the card wire from the connector UCW2 on the FL display & System control board.1.2.3.Removing the FL display & System contr