JVC-MXDVB10-cs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOMPACT COMPONENT SYSTEM No.21120Sep. 2002COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.MX-DVB10MX-DVB10Safety precautionsPreventing static electricityPrecautions for serviceImportant for laser productsDisassembly methodAdjustment method1-21-31-41-51-61-26Maintenance of laser pickupRepla

2、cement of laser pickupFlow of functional operation until TOC readDescription of major ICs 1-341-341-351-3670Contents Area suffixUS - SingaporeUX - Saudi ArabiaUN -Asean(SP-XCDVB10)(SP-XSDVB10)(CA-MXDVB10)(SP-WDVB10)(SP-XDVB10)(SP-XDVB10)(SP-WDVB10)(SP-XSDVB10)MAINMAINSUBWOOFERREARREARCENTERSUBWOOFER

3、RadioFans.CN 收音机爱 好者资料库MX-DVB101-21. 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 unless authorized in writing by the manufacturer. Replacement parts mu

4、st 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 should not be made. Any design alterations or additions will void the ma

5、nufacturers 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 characteristics. These characteristics are often not evident from visual insp

6、ection 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 Parts List of Service Manual. Electrical components having such featu

7、res 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 in the Parts List of Service Manual may create shock, fire, or other

8、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 shock and fire hazard. When service is required, the original lead rou

9、ting and dress should be observed, and it should be 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 te

10、rminals, 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 line cord directly into the AC outlet. Using a Leakage Current Tester,

11、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.).Alternate check methodPlug the AC line cord directly into the AC outl

12、et. 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.Measure the AC voltage across the resistor with the AC voltmeter. Move th

13、e resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This cor

14、responds 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.3. Repairs must be made in accordance with the relevant safety standards.

15、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 VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!Burrs

16、 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 side (parts side) of the PWB diagrams, the parts that are printed over with

17、 black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. (This regulation does not correspond to J and C version.)RadioFans.CN 收音机爱 好者资料库MX-DVB101-3Preventing static electricity1. Grounding to prevent damage by static electricity Electrostatic

18、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.2. About the earth processing for the destruction prevention by static electricit

19、y 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 being performed. 2-1 Ground the workbench Ground the workbench by laying conductive material (s

20、uch 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 in your body. 3. Handling the optical pickup1. In order to maintain quality during transport and b

21、efore 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 use a tester to check the condition of the laser diode in the optical pickup. The testers internal p

22、ower 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. 2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical p

23、ickup. 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 the connector. 3. Handle the flexible cable carefully as it may break when subjected to strong force.

24、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 strapMX-DVB101-4Precautions for service Handling of Traverse Unit and Laser Pickup 1. Do not touch any peripheral elemen

25、t 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.) 4. When replacing the pic

26、kup, 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. 5. 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 se

27、tting 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 clothing or the human body. Before repairing peripheral elements of the traverse unit or pickup, be s

28、ure 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.When you remove the traverse mechanism from the servo control

29、substrateThe laser diode of pick-up might be destroyed by static electricity and set switch (S11) on the pick-up boardon SHORT side, please before removing the card wire from connector (CN10). Moreover, please set switch (S11) on OPEN side after assembling and inserting the card wire inconnector (CN

30、10) without fail at times. When you remove the pick-up from the traverse mechanismThe laser diode of the pick-up might be destroyed by static electricity. Before extractingthe flexible wire from connector (CN12), please solder point A as shown below. Moreover, please remove solder in point A after i

31、nserting a flexible wire in connector (CN12). CN12CN10Soldering points ATraversemechanismTraversemechanismPick-upOPENSHORTSWITCH S11MX-DVB101-5Important for laser products 1. CLASS 1 LASER PRODUCT 2. DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposur

32、e 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 with safety switches which prevent emission of radiat

33、ion when the drawer is open and the safety interlocks have failed or are defeated. 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 other than those specified

34、herein may result in hazardous radiation exposure.VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen.VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen.ADVARSEL : Usynlig laserstrling ved bning , nr sikk

35、erhedsafbrydere er ude af funktion. Undg udsttelse for strling.ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling.REPRODUCTION AND POSITION OF LABELSWARNING LABEL! CAUTIONPlease use enough caution not to see the beam directly or touch it in case o

36、f an adjustment or operationcheck.DANGER : Invisibie laser radiation when open and interlock or defeated.AVOID DIRECT EXPOSURE TO BEAM (e)VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s)VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nk

37、ymttmlle lasersteilylle.l katso steeseen. (d)ADVARSEL :Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. (f)CLASS 1LASER PRODUCTMX-DVB101-6Remove the six screws marked A on the back of the body.Remove the two screws marked B on both sides of the

38、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 to 3)Do not break the front panel tab fitted to the metal cover.CAUTION: Prior to performing the following procedures, remove the metal cover.Disconnect the car

39、d wire from connector CN1 on the tuner board.Remove the plastic rivet fixing the tuner board.Remove the two screws marked C on the back of the body.1.2.3.Removing the tuner board (See Fig.4)Fig.1Fig.2Fig.3AAAMetal coverMetal coverBMetal coverBFig.4DVD changer mechanism assemblyCN1Front panelassembly

40、Plastic rivetRear panelCTuner boardMX-DVB101-7Prior to performing the following procedures, remove the metal cover and the tuner board.Disconnect the card wire from the connectors CN540, CN541 and CN542 on the main board.Remove the two screws marked D on the upper side of the body and two screws mar

41、ked F on the back of rear panel.Remove the plastic rivet attaching the main board.Pull both the rear panel and the front panel assemblyto the outside, then remove the DVD changer mechanism assembly by lifting the rear part of the assembly. 1.2.3.4.Removing the DVD changer mechanism assembly (See Fig

42、.5 to 6)To prevent damage to the DVD fitting, be sure to pull both the rear panel and the front panel assembly enough to remove the DVD changer mechanism assembly.CAUTION: Fig.5Fig.6Front panel assemblyDDDVD changer mechanism assemblyRear panelCN542DVD changer mechanism assemblyFFront panel assembly

43、Plastic rivetRear panelCN541CN540Main boardMain boardMX-DVB101-8Prior to performing the following procedures, remove the metal cover, the tuner board and the DVD changer mechanism assembly.Remove the plastic rivet attaching the main board.Disconnect the card wires from the connector CN500, CN505 and

44、 CN510 on the main board respectively.Remove the tie band and disconnect the wire from the connector CN513 on the main board.Disconnect the wire from the connector CN220 on the transformer board.Remove the two screws marked G on the bottom of the body.Release the two joints marked a on the lower rig

45、ht and left sides of the body using a screwdriver, and remove the front panel assembly toward the front.1.2.3.4.5.6.Removing the front panel assembly (See Fig.7 to 11)Fig.9Fig.10Fig.11G(Bottom)Front panel assemblyJoint aJoint aFront panel assemblyFront panel assemblyFig.7Fig.8Tie bandCN500CN505CN510

46、Transformer boardCN220Front panel assemblyFront panel assemblyMain boardPlastic rivetCN513Main boardMX-DVB101-9Prior to performing the following procedures, remove the metal cover, the tuner board and the DVD changer mechanism assembly.Remove the screw marked H attaching the rear cover on the back o

47、f the body.Push each tab of the four joints marked b in the direction of the arrow and release.Remove the seventeen screws marked I attaching the rear panel.Release the joints marked c on each lower side of the rear panel using a screwdriver and remove the rear panel backward.1. 2.3.4.Removing the r

48、ear cover / rear panel(See Fig.12 to 15)Prior to performing the following procedures, remove the metal cover, the tuner board the DVD changer mechanism assembly and rear panel.Move the power cord stopper upward and pull out it from the base chassis.Disconnect the power cord from connector CN250 on t

49、he power supply board.Remove the tie band from the power supply board.1.2.3.Fig.12Fig.13Fig.14Fig.15Rear panelHJoint bJoint bRear coverRear panelIIIJoint cJoint cRear panelRear panelIRemoving the power cord (See Fig.16)Fig.16Front panel assemblyTie bandPower supply boardPower cordPower cord stopperC

50、N250MX-DVB101-10Prior to performing the following procedures, remove the metal cover, the tuner board, the DVD changer mechanism assembly, the power supply board and the rear panel. Removing the amplifier board (1, 2), AV output board & speaker terminal board (See Fig.18 to 21)Remove the tie band ma