JVC-MXJ150R-cs-sm 维修电路原理图.pdf

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1、COMPACT COMPONENT SYSTEMNo.20858Oct. 2000COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.MX-J150RMX-J150RArea SuffixEENEVContinental EuropeNorthern EuropeEastern EuropeCOMPACTDIGITAL AUDIOOPEN / CLOSESTANDBYDISC CHANGECOMPACTDIGITAL AUDIOPLAYREC/PLAYCD SYNCHRO RECORDINGEJECTEJECTPROGRAM/SETCOUNTERRESETD

2、ISPLAYMODEPTY/EONCLOCK/TIMERREPEATAUXFM/AM- TUNINGTUNING +CDTAPETAPE A/BCD RECSTARTA BDUBBINGREC/PAUSEFULL-LOGIC CONTROLDEMOVOLUMECD1CD2CD3+PLAY & EXCHANGERPHONESCOMPUPLAYCONTROL PRESET+ACTIVE BASS EX.SOUND MODE SELECT +CDPROGRAM/SETREPEAT ON/OFFSLEEPTIMERSOUNDMODEACTIVE BASS EX.TAPEA/BTUNING MODE F

3、M MODETAPEDISC SKIPVOL.VOL.FM/AMAUXFADEMUTING+RMSMXJ100E REMOTE CONTROLCDSP-MXJ150RSP-MXJ150RCA-MXJ150RSafety precautionsImportant for laser productsPreventing static electricityDisassembly methodAdjustment method1-21-31-41-51-19Flow of functional operation until TOC readMaintenance of laser pickupR

4、eplacement of laser pickupDescription of major ICs 1-231-241-241-25ContentsSERVICE MANUALRadioFans.CN 收音机爱 好者资料库MX-J150R1-2Safety Precautions1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes s

5、hould 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

6、 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 product

7、s 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

8、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 th

9、e 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

10、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 current check (Electrical shock hazard testing)After re-asse

11、mbling 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 transf

12、ormer 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 cur

13、rent 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 pa

14、rt 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 measure the AC voltage across the resistor. Now, reverse the plug i

15、n 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

16、 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

17、 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

18、者资料库MX-J150R1-3Important 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 L

19、aser 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.CAUTI

20、ON : 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 e

21、j 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 avslot

22、t. unng utsettelse for strling.REPRODUCTION OF LABELS!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASSIFICATION LABEL, PLACED ON REAR ENCLOSUREWARNING LABEL, PLACED INSIDE THE UNITCLASS 1LASER PRODUCTDANGER: Invisible laser ra

23、diation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)ADVARSEL: Usynlig laser-strling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udst-telse for strling (d)VARNING: Osynlig laser- strlning nr denna del r ppnad och sprren r urkopplad. Betrakta ej strlen.

24、(s)VARO: Avattaessa ja suo-jalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. (f)MX-J150R1-4Preventing static electricity1. Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric,

25、 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 d

26、estroyed 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 u

27、nit (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 pick

28、up 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 (op

29、tical 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. Remo

30、ve 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 po

31、wer. Do not turn itConductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapAttention when CD mechanism assembly is decomposed1. Remove the CD changer unit. 2. Remove the CD changer mechanism. 3. Solder is put up before the card wire is removed from the pickup unit connect

32、or on the CD mechanism assembly. (When the card wire is removed without putting up solder, the CD pick-up assembly might destroy.) 4. Please remove solder after connecting the card wire with the pickup unit connector when you install picking up in the substrate.*Please refer to Disassembly method in

33、 the text for pick-up and how to detach the CD mechanism assembly. SolderingFig.1Fig.2Card wireCard wirePickup unitconnectorPickup unitconnectorCD changer unitCD changer mechanismMX-J150R1-5Remove the three screws A on the back of the body and the two screws B on both sides of the body. Remove the t

34、op cover upward from behind.Remove the two screws C attaching the side covers on the back of the body and the six screws D on both sides.Slide the right and left covers backward and unhook the two hooks a in the lower part of the side covers as shown in Fig.2-2. 1.2.3.4.Removing the top cover & the

35、side covers (See Fig.1 to 3) Disassembly methodFig.1Fig.2Fig.2-2Fig.3Top coverAAACCSide cover (L)Side cover (R)Side cover (R)BDDDTop coverHooks aTop coverHooks aBDDDSide cover (L)HookHookMX-J150R1-6Prior to performing the following procedure, remove the top cover and the side covers.Press the POWER

36、button. Press the OPEN/CLOSE button to eject the CD tray. Move the CD tray fitting upward and release the joint b.Press the OPEN/CLOSE button to insert the CD tray.1.2.3.Removing the CD tray fitting (See Fig.4 to 6)Be sure to remove the CD tray fitting before removing the CD changer unit. ATTENTION:

37、 Turn the black loading pulley gear marked c from the back of the CD changer unit as shown in Fig.7 and draw the CD tray toward the front. Move the CD tray fitting upward and release the joint b. Push and insert the CD tray manually. 1.2.3.Removing the CD tray fitting (See Fig.5 to 7)- How to eject

38、the CD tray without turning on power -Fig.4Fig.5Fig.6Fig.7POWER buttonOPEN/CLOSE buttonCD trayJoint bJoint bCD tray fittingCD trayMarked cLoading pulley gearMX-J150R1-7Prior to performing the following procedure, remove the top cover, the side covers and the CD tray fitting.Disconnect the card wire

39、from connector SCW1 of the CD servo board on the back of the CD changer unit.Disconnect the harness from connector FW2 on the inner side of the main board in the body.Remove the two screws E attaching the CD changer unit on the back of the body. Draw the CD changer unit upward from behind while pull

40、ing the rear panel outward. 1.2.3.4.Removing the CD changer unit (See Fig.8 to 10)Fig.8Fig.9Fig.10SCW1CD servo boardCD changer unitMain boardFW2Rear panelERear panelFront panel assemblyCD changer unitMX-J150R1-8Prior to performing the following procedure, remove the top cover, the side covers, the C

41、D tray fitting and the CD changer unit.There is no need to remove the rear panel. Disconnect the harness from head wire connector DW1 and DW2 on the inner side of the main board in the body.Disconnect the harness from connector HCW1 of the headphone board on the right side of the body. Remove the sc

42、rew F and the two screws G attaching the front panel assembly on both sides of the body.Remove the screw V attaching the earth terminal extending from the front compartment. Remove the screw H attaching the front panel assembly on the bottom of the body.Release the two joints d on both sides and two

43、 joints e on the bottom of the body using a screwdriver. At the same time, disconnect the front compartment from connector CCW1 and CCW2 of the main board. 1.2.3.4.5.Removing the front panel assembly (See Fig.11 to 13)Fig.11Fig.12Fig.13Main boardDW2DW1CCW1CCW2Front panel assemblyJoint dearth wireGVF

44、ront panel assemblyFGMain boardHeadphone boardHCW1HJoint eJoint eJoint dMX-J150R1-9Prior to performing the following procedure, remove the top cover, the side covers, the CD tray fitting and the CD changer unit.There is no need to remove the front panel assembly. Remove the seven screws I attaching

45、the main board and the tuner board to the rear panel on the back of the body.Remove the three screws J attaching the heat sink to the rear panel on the back of the body. Remove the three screws K attaching the rear panel on the back of the body. 1.2.3.Removing the rear panel (See Fig.14)Prior to per

46、forming the following procedure, remove the rear panel.Disconnect the harness from connector HCW1 of the headphone board on the right side of the body. Release the harness from the clamp in the body. Disconnect the harness from head wire connector DW1 and DW2 extending to the main board in the body.

47、 Disconnect the harness from connector RCW1 of the power transformer.Remove the screw L attaching the earth terminal to the base chassis.Remove the screw F attaching the front panel assembly.Disconnect connector CCW1 and CCW2 connected to the main board. 1.2.3.4.5.6.Removing the main board(See Fig.1

48、5 and 16) Fig.14Fig.15Fig.16IRear panelIIKKJFront panel assemblyMain boardHeadphone boardHCW1Main boardHeat sinkTuner boardDW2DW1CCW2CCW1Power transformerRCW1LClampFMX-J150R1-10Prior to performing the following procedure, remove the main board.Remove the three screws M attaching the heat sink cover

49、plate.Remove the two screws N attaching the power IC to the heat sink and the three screws O attaching the heat sink to the main board. 1.2.Removing the heat sink (See Fig.17 and 18)The tuner board can be removed even if the main board is attached.Release the joint tab f of the tuner board holder an

50、d the main board, and disconnect connector FW1 connected to the main board. Remove the tuner board assembly (Refer to Fig.18).Remove the screw P attaching the tuner board holder. Release the two tabs g outward and remove the tuner board from the holder. 1.2.Removing the tuner board (See Fig.18 to 20