JVC-MXJ200-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOMPACT COMPONENT SYSTEMNo.20860Aug. 2000COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.Printed in Japan200008(V)VICTOR COMPANY OF JAPAN, LIMITEDAUDIO & COMMUNICATION BUSINESS DIVISIONPERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,JapanMX-J200 No.20860MX-J200MX-J200ContentsSafety PrecautionsImportant for laser productsPreventing static electricityDisassembly methodAdjustment methodFlow of functional operation until TOC readMaintenance of laser pickupReplacement of laser pickupDescription of major ICs1-21-31-41-51-211-241-251-251-26Area SuffixBEENEEEVU.K.Continental EuropeNorthern EuropeRussiaEastern EuropeCOMPACTDIGITAL AUDIOCD3CD2CD1STANDBYVOLUMECD1CD2CD3PLAY & EXCHANGEFM /AM CDPLAYREC/PLAYAUTO REVERSEEJECTCOMPACTDIGITAL AUDIOTAPECOMPUPLAYCONTROLFULL LOGIC CONTROL1 BITDUAL D/A CONVERTERAUXPHONESMX-J200+EJECTRECSTART/STOPCLOCK/TIMERDISPLAYSETCANCELDEMODUBBINGCD REC STARTPROGRAMRANDOMREPEATPRESETTUNNERREVERSE MODETAPE A/BSOUND MODEACTIVE BASS EX1/CLEARC DTAPECLOCKTIMERSLEEPSELECT +RM-SMXJ300V REMOTE CONTROL23456AUXFM/AMFM MODEPLAY MODECD3CD2CD1A TAPE - BREC PAUSESOUNDMODEVOLUMEACTIVE BASS EX.SHIFT78910+10 SETRadioFans.CN 收音机爱 好者资料库MX-J2001-2Safety Precautions1. 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 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 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. 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. 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 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 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-assembling.5. Leakage currnet 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 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 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 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 eachexposed 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 measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). Warning1. 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.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!CAUTIONBurrs 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.RadioFans.CN 收音机爱 好者资料库MX-J2001-3Important 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 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 whichprevent 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 other than those specified 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 sikkerhedsafbrydere 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 LABELDANGER : 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 nkymttmlle lasersteilylle.l katso steeseen. (d)ADVARSEL :Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. (f)CLASS 1LASER PRODUCT!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.MX-J2001-4Preventing static electricity1. 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 performing 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 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 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 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. 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 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 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 sheet) or iron plate(caption)Anti-static wrist strapAttention when traverse unit is decomposed1. Remove the disk stopper and T. bracket on the CD changer mechanism assembly. 2. Disconnect the harness from connector on the CD motor board.3. CD traverse unit is put up as shown in Fig.1. 4. Solder is put up before the card wire is removed from connector CN601 on the CD servo control board as shown in Fig. 2. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.) 5. Please remove solder after connecting the card wire with CN601 when you install picking up in the substrate.*Please refer to Disassembly method in the text for pick-up and how to detach the CD traverse mechanism. SolderingFig.1Fig.2CD changermechanism assemblyCD traverse unitFlexible cableMX-J2001-5Remove the six screws A attaching the metal cover on the back of the body.Remove the two screws B on both sides of the body.Remove the metal cover from the body while lifting up the rear part of the cover.1.2.3.Removing the metal cover (See Fig.1 to 3)Disassembly methodFig.3Fig.2Fig.1Metal coverAAAMetal coverBMetal coverBMX-J2001-6Prior to performing the following procedures, remove the metal cover.Remove the two screws C attaching the CD changer mechanism assembly on the top of the body.Disconnect the card wire from connector CN303 on top of the main board.Rlease the harness from the clamp on the lower part of the CD changer mechanism assembly.Remove the plastic rivet a fixing the main board to the front assembly on the left side of the body.Remove the two screws D from the rear panel.Detach backward the front part of the CD changer mechanism assembly while pulling the front panel assembly and the rear panel outward, then pull out the upward the rear part of the CD changer mechanism assembly.1.2.3.4.5.6.Removing the CD changer mechanism assembly (See Fig.4 to 7)Fig.6Fig.5Fig.4Fig.7Pull outwardCMain boardCN303Plastic rivet a CN303CD changer mechanism assemblyRear panelFront panelDRear panelCD changer mechanism assemblyCD changer mechanism assemblyRear panelFront panel assemblyPull outwardMain boardMain boardMX-J2001-7Removing the front panel assembly (See Fig.8 to 13)Prior to performing the following procedures, remove the metal cover and the CD changer mechanism assembly.Disconnect the card wires from connector CN301, CN304, CN305 and the harness from CN302 on the inside of the main board.Remove the screw E attaching the earth wire.Turn over the body and remove the two screws E.Release the joint b on the bottom and the joint c and d on both sides of the body using a screwdriver, and detach the front panel assembly toward the front.1.2.3.4.Fig.10Fig.9Fig.8Fig.12Fig.13Main boardFront panel assemblyMain boardCN301CN304CN305CN302CN901A,CN901BEFront panel assemblyJoint bFront panel assemblyJoint cFront panel assemblyJoint d(Bottom)Fig.11Eath wireEMX-J2001-8Prior to performing the following procedures, remove the metal cover and the CD changer mechanism assembly.It is not necessary to remove the front panel assembly.Remove the two screws F and the rear cover on the back of the body.Remove the four screws G and the six screws H attaching the main board and the heat sink to the rear panel.Remove the screw I attaching the rear panel to the chassis base.Release the lower two joints e and f on both sides of the rear panel using a screwdriver and detach the rear panel backwards.1.2.3.4.Removing the heat sink cover and the rear panel (See Fig.14 to 17)Fig.14Fig.15Fig.16Fig.17IRear panelHGRear panelFFRear coverG (To Earth bracket)GHRear panelJoint eRear panelJoint fMX-J2001-9Prior to performing the following procedures, remove the metal cover, the CD changer mechanism assembly and the rear cover and the rear panel.It is not necessary to remove the front panel assembly.Disconnect the card wires from connector CN301, CN304, CN305 and the harnesses from CN302, CN901A and CN901B on the inside of the main board.From the left side of the body, remove the screw L attaching the main board to the chassis base.Remove the main board from the body1.2.3.Removing the main board (See Fig.18 and 19)Prior to performing the following procedure, remove the main board.Remove the two screws J and the screw K attaching the heat sink to the main board. Remove the IC304 and IC bracket on the back of the heat sink.1.Removing the heat sink (See Fig.20 and 21)Fig.18Fig.19LRear panelMain boardMain boardCN301CN304CN305CN302CN901A,CN901BFig.20Fig.21Heat sinkJKMain boardHeat sinkIC304IC bracketMX-J2001-10Prior to performing the following procedure, remove the metal cover and the CD changer mechanism assembly.Disconnect the harness from connector CN901A and CN901B on the inside of the main board.Cut off the tie band g of the power transformer assembly and unsolder the power cord.(Make sure to bundle the wires after repair.)Remove the four screws M attaching the power transformer assembly.When removing the power transformer assembly with the power cord, remove the rear panel and pull out the power cord stopper from the bottom chassis upward.1.2.3.Removing the power transformer assembly (See Fig.22 to 24)Fig.22Fig.23Fig.24MPower transformer assemblyTie band gCN901A,CN901BMPower transformer assemblyTie band gTie band gPower transformer assemblyPower cord stopperRear panelMX-J2001-11Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the front panel assembly.Disconnect the card wire from connector CN352 on the cassette amplifier board.Remove the six screws N attaching the cassette mechanism assembly. 1.2.Prior to performing the following procedure, remove the cassette mechanism assembly.Disconnect the card wire from connector CN353 on the cassette amplifier board. 1.Removing the cassette mechanism assembly (See Fig.25)Removing the ca