Jvc-MXDVA-5-UW-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COMPACT COMPONENT SYSTEM No.20966 Jun. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. MX-DVA5 MX-DVA5 Area Suffix Contents Safety Precautions Important for laser products Preventing static electricity Disassembly method Wiring connection Adjustment method Troubleshooting Descriptio

2、n of major ICs 1-2 1-3 1-4 1-5 1-17 1-18 1-22 1-25 35 UG US UW UY Turkey, South Africa, Egypt Singapore Brazil, Mexico, Peru Argentina CD/ DVD Mechanism is exchanged by a unit (contain CPC cords). SP-MXDVA5CA-MXDVA5SP-MXDVA5 PlayBack Control VIDEO CD CLOCK /TIMERDISPLAY PHONES REPEAT SELECT REC STAR

3、T /STOP CD REC STARTDUBBING TUNING TAPE B DISC CHANGE SOUND MODE SUBWOOFER LEVEL TAPE A STANDBY/ON STANDBY (No MIC jack and MIC LEVEL volume for UY ver. ) RadioFans.CN 收音机爱 好者资料库 MX-DVA5 1-2 1. This design of this product contains special hardware and many circuits and components specially for safet

4、y 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

5、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.

6、 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

7、. 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

8、 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 part

9、s, 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 currne

10、t 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

11、 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 th

12、e 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 parallel

13、ed 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 chassis, and meausr

14、e 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. I

15、t 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, c

16、heck 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

17、 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 safety. W

18、hen 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 MX-DVA5 1-3 Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or def

19、eated. 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 whichp

20、revent 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

21、 other than those specified herein may result in hazardous radiation exposure. POSITION OF LABELS LASER CAUTION LABEL !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. CLASS 1 LASER PRODUCT RadioFans.CN 收音机爱 好者资料库 MX-DVA5 1-4 Pre

22、venting static electricity 1. Grounding to prevent damage by 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 perfor

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

24、 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 before 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 i

25、n your body. 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 u

26、se 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. 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.

27、 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 th

28、e 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 Attention w

29、hen traverse unit is decomposed Because the CD mechanism assembly of this model is a unit component, the individual component parts consisting of the CD mechanism assembly are not supplied separately. If you need to decompose the traverse unit, short-circuit the connector of the flexible board by us

30、ing a metal clip and the like prior to decomposing the traverse unit. CD travers unit Flexible board Metal clip CD mechanism assembly MX-DVA5 1-5 Remove the three screws A attaching the metal cover on the back of the body. Remove the six screws B attaching the metal cover on both sides of the body.

31、Remove the metal cover from the body by lifting the rear part of the cover. 1. 2. 3. Disassembly method Removing the metal cover (See Fig.1 and 2) Do not break the front panel tab fitted to the metal cover. ATTENTION: Prior to performing the following procedure, remove the metal cover. Disconnect th

32、e card wire which is attached with adhesive to the left side of the CD/ DVD changer unit. Disconnect the harness from connector ACW4 and DCW1 of the CD/ DVD servo board on the back of the CD/ DVD changer unit. Disconnect the harness from connector LCW2 and LCW6 on the DVD power board. Disconnect the

33、 card wire from connector UCW3 on the FLdispaly & 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 both side of the body. Draw the CD changer unit upward from behind while pulli

34、ng the rear panel outward. 1. 2. 3. 4. 5. 6. 7. Removing the CD/ DVD changer unit (See Fig.3 to 6) Fig.1 Fig.2 Fig.3 Metal coverA AA Metal coverB B Rear panel Front panel assembly (Bottom side)(Bottom side)(Bottom side) CD/ DVD servo board CD/ DVD changer unit LCW6 LCW2 ACW4/ DCW1 DVD power board MX

35、-DVA5 1-6 Prior 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 ECW1 and HCW3 on the inner side of the main board in the body. Remove the two screws E attaching the fron

36、t 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 body. Release t

37、he 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 panel C DD Rear panel Rear panel Front panel assembly Adhesive card wire strap CD/ DVD changer unit CD/ DVD changer unit Fig.7 Main

38、 boardFCW3 JCW2 JCW1 HCW3 Front panel assembly Joint a earth wire E F ECW1 Fig.4 Fig.5 Fig.6a Fig.6b UCW3 Front panel assembly FLdispaly & system control board MX-DVA5 1-7 Prior to performing the following procedure, remove the metal cover and the CD/ DVD changer unit. Remove the four screws I attac

39、hing the heat sink cover 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. D

40、isconnect the card wire 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.

41、3. 4. 5. 6. Removing the heat sink, AMP board and DVD power board (See Fig.10 to 12) Fig.8 Fig.9 Front panel assembly G E Main board H Joint bJoint b Joint c Bottom side Fig.10 Fig.11 Rear panel Heat sink cover Heat sink Speaker terminal Tuner terminal K L I I J J Fig.12 ACW1 Rear panel AMP board AC

42、W2 LCW5 LCW4 DVD power board MX-DVA5 1-8 Prior to performing 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 1

43、3) Prior to performing the following procedure, remove the metal cover, CD/ DVD changer unit, heat sink & AMP board and tuner pack. Remove the one screw M (Except UY), three screws N and five screws N attaching the rear panel. Removing the rear panel (See Fig.14) 1. Prior to performing the following

44、 procedure, remove the metal cover, CD/ DVD changer unit, heat sink & AMP board tuner pack and rear cover. Disconnect the card wire from connector FCW3 and the harness from connector JCW1, JCW2, ECW1 and HCW3 on the main board. Disconnect the harness from connector PCW1 on the power transformer boar

45、d. Remove the screw G attaching the main board holder. (See Fig.8) Remove the two screws O attaching the heat sink and bottom chassis. 1. 2. 3. 4. Removing the main Board (See Fig. 15) Main board Tuner board CON01 N M Fig.14 Rear panel Fig.13 N Fig.15 Transformer board O FCW3 JCW2 JCW1 HCW3 PCW1 Mai

46、n board ECW1 Rear panel (Except UY) MX-DVA5 1-9 Prior to performing the following procedure, remove the metal cover, CD/ DVD changer 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 thre

47、e 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 Fig.16 and 17) Prior to performing the following procedure, remove the metal cover, CD/ DVD changer unit, heat sink & AMP board, tuner pack and rear cover. Disconnec

48、t the power cord from connector RCW2 of the power transformer board. Disconnect the harness from connector PCW1 of the power transformer board. Remove the four screws S attaching the power transformer. 1. 2. 3. Removing the power transformer (See Fig .18) Fig.17 Fig.16a P Heat sink AMP board Heat si

49、nk Power ICs solder point Fig.18 S Q Power cord RCW2 PCW1 Power transformer DVD power board Fig.16b DVD power board AMP board R S Heat sink MX-DVA5 1-10 Disconnect the card wire from the connector UCW3, UCW4,UCW5 and UCW6 on the FL & system control board. Remove the five screws U attaching the FL & system board. Disconnect the card wire from the connector UCW2 on the FL & system control board. 1. 2. 3. Removing the FL display & system control board (See Fig.19) Disconnect the