JVC-UXL40-cs-sm 维修电路原理图.pdf

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1、1-1UX-L40/UX-L30SERVICE MANUALMICRO COMPONENT SYSTEMNo.21105Jul. 2002COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.UX-L40/UX-L30UX-L40/UX-L30Safety precautionsPreventing static electricityImportant for laser productsDisassembly methodAdjustment methodContentsFlow of functional operation until TOC read

2、 (CD)Maintenance of laser pickupReplacement of laser pickup Description of major ICs1-21-31-41-51-191-241-251-251-2635STANDBY/ONDISPLAYCLOCK/TIMERSLEEPBASSTREBLEUPDOWNCANCELSETCDTAPEFM/AMAUX/MDCDPRGMRANDOMREPEATSURROUND AHB PRODIMMERVOLUMEREV.MODE FM MODEAUTOPRESETRM-SUXL40U REMOTE CONTROLCOMPACTDIG

3、ITAL AUDIOCD-R/RW PLAYBACKRECSURRONDAHB PROVOLUMEBASSTREBLEPHONESA UT O REVERSECDTAPEFM/AMMICRO COMPONENT SYSTEM UX-L40CLOCK/TIMERAUX/MDDOWNUPSTANDBY / ON+PUSHOPENSP-UXL40SP-UXL40CA-UXL40SP-UXL30SP-UXL30CA-UXL30STANDBY/ONDISPLAYCLOCK/TIMERSLEEPBASSTREBLEDOWNCANCELSETCDPRGMRANDOMREPEATAHB PRODIMMERVO

4、LUMEREV.MODE FM MODEAUTOPRESET14710258369+10RM-SUXL30U REMOTE CONTROLUPCD/TAPEFM/AMAUX/MDCOMPACTDIGITAL AUDIOCD-R/RW PLAYBACKRECREV. MODEAHB PROVOLUMEBASSTREBLEPHONESA UT O R E V E R S ECDTAPEFM/AMMICRO COMPONENT SYSTEM UX-L30CLOCK/TIMERAUX/MDDOWNUPSTANDBY / ON+PUSHOPENUS - SingaporeUP - KoreaUW - B

5、razil,Mexico,PeruUJ - U.S.MilitaryArea Suffix UX-L30US - SingaporeUP - KoreaUW - Brazil,Mexico,PeruArea Suffix UX-L40RadioFans.CN 收音机爱 好者资料库1-2UX-L40/UX-L301. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protectio

6、n, 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 n

7、ot 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

8、 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

9、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 charac

10、teristics 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 part

11、s 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 testin

12、g)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 i

13、solation 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. A

14、ny 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

15、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 meausre the AC voltage across the resistor. Now, re

16、verse 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. It is the legal responsibility of the repairer

17、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 groundP

18、lace this probe on each exposedmetal part.AC VOLTMETER(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 co

19、mponent 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. (This regulation does not correspond to J and C version.)Radi

20、oFans.CN 收音机爱 好者资料库1-3UX-L40/UX-L30Preventing static electricity1.Grounding to prevent damage by static electricityElectrostatic 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). Ta

21、ke care to prevent this when performing repairs.2.About the earth processing for the destruction prevention by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repai

22、rs 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

23、 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 no

24、t 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

25、. 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 t

26、he 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 itAttention when traverse unit is decomposed1.Solder is put up before the card wire is removed from c

27、onnector on the CD substrate as shown in Figure. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.)2.Please remove solder after connecting the card wire with when you install picking up in the substrate.*Please refer to Disassembly method in the text for pic

28、k-up and how to detach the substrate. (caption)Anti-static wrist strapConductive material (conductive sheet) or iron plateCN601 onmechanismboardShorting roundShorting roundFlexible wire1-4UX-L40/UX-L30Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open a

29、nd 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 wit

30、h 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 per

31、formance 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.A

32、DVARSEL : 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 LABELCLASS 1LASER PRODUCT!CAUTIONPlease

33、use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.1-5UX-L40/UX-L30Remove the six screws A on the back of the main body.Remove the screw B on each side and remove the cover in the direction of the arrow.1.2.Disassembly methodRemoving the Metal cove

34、r (See Fig.1 to 3)Fig.1Fig.2Fig.3AAABB1-6UX-L40/UX-L30Remove the metal cover.Remove the two screws C retaining the rear cover.1.Removing the Rear cover (See Fig.4)Remove the metal cover and the rear cover.Remove the twelve screws D retaining the rear panel. Release the two joints a on the rear side

35、and the joint b on each side.1.Removing the Rear panel (See Fig.5)Fig.4Fig.5CCDDDDDDabb1-7UX-L40/UX-L30Remove the metal cover.Disconnect the card wire from connector CN1 on the tuner board.Remove the two screws E on the rear side and the screw F on the side.1.2.Removing the Tuner board (See Fig.6)Re

36、move the metal cover.Disconnect the shield wire from connector CN905 on the optical digital board.Remove the screw G on the rear side and the screw H on the upper side.1.2. Removing the Optical digital board (See Fig.7)Fig.6Fig.7EFGHCN1CN905Tuner boardOptical digital board1-8UX-L40/UX-L30Remove the

37、metal cover, the rear cover, the rear panel, the tuner board and the optical digital board.Disconnect the card wire from connector CN903 and CN904 on the main board.Pull the joint c in the direction of the arrow and remove the CD-R/RW mechanism assembly backward while releasing the joint d.1.2.Remov

38、ing the CD-R/RW mechanism assembly (See Fig.8)Fig.8cdCD-R/RW mechanism assemblyMain boardCN904CN9031-9UX-L40/UX-L30Remove the metal cover, the rear cover and the rear panel.Disconnect the card wire from connector CN902, CN903, CN904 and CN905 on the main board and remove the CD-R/RW mechanism assemb

39、ly.1.Removing the Main board/ the Heat sink board (See Fig.9 to 11)Remove the two screws I to remove the main board.Disconnect the card wire from connector CN931, CN935, CN933, CN934, CN913, CN901, CN900 and CN917 on the main board.Remove the band f and disconnect the card wire from connector CN951

40、on the power transformer assembly. Remove the main board / the heat sink board from the body.Release the joint e of the main board and disconnect connector CN944 and CN945 of the heat sink board from connector CN915 and CN916 of the main board respectively.2.3.4.5.Refer to the method of removing the

41、 CD-R/RW mechanism assembly and Fig.8.REFERENCE: Fig.9CN916CN900CN901CN913CN934CN933CN935CN917CN951CN905CN902CN904CD-R/RW mechanism assemblyCN903CN915Fig.10Fig.11CN945CN944IfIeMain boardMain boardMain boardHeat sink boardHeat sink boardPower transformer assemblyCN9311-10UX-L40/UX-L30Remove the metal

42、 cover, the rear cover, the rear panel, the CD-R/RW mechanism assembly and the main board.Disconnect the power cord from connector J1000 on the power transformer assembly.Remove the four screws J.1.2.Removing the Power transformer assembly (See Fig.12)JJJJ1000Power transformer assemblyFig.121-11UX-L

43、40/UX-L30Remove the metal cover.Remove the screw K on each side. Pull the joint h on both sides and lift the front panel assembly to release the joint g.Disconnect connector CN931, CN935, CN933 and CN934 on the main board.Disconnect the card wire from connector CN33 and CN34 on the cassette mechanis

44、m board.1.2.3.Removing the Front panel assembly (See Fig.13 to 16)Fig.13Fig.14Fig.15Fig.16KKhhhgghgMain boardFront panel assemblyFront panel assemblyCN935CN931CN933CN934CN34 CN33Cassette mechanism boardCassette mechanism assembly1-12UX-L40/UX-L30Prior to performing the following procedure, remove th

45、e metal cover and the front panel assembly.Disconnect connector CN913 on the main board.1.Removing the Phones board (See Fig.17)Prior to performing the following procedure, remove the metal cover and the front panel assembly.Remove the four screws L retaining the cassette mechanism assembly.1.Removi

46、ng the Cassette mechanism assembly (See Fig.18)Main boardCN913Phones boardFig.17Fig.18LLCassette mechanism assembly1-13UX-L40/UX-L30Prior to performing the following procedure, remove the metal cover and the front panel assembly.Remove the seven screws M to remove the control board.1.Removing the Co

47、ntrol board (See Fig.19)Prior to performing the following procedure, remove the metal cover and the front panel assembly.Remove the four screws N attaching the volume panel on the front panel assembly.Remove the six screws O attaching the volume board on the volume panel, and remove the volume board

48、.1.2.Removing the Volume board (See Fig.20 and 21)Control boardFig.19Fig.20Fig.21MMNNOOVolume boardVolume panelO1-14UX-L40/UX-L30Remove the two screws A on the bottom of the loading base.Disconnect the card wire from connector CN606 on the CD servo board. Turn over the CD servo board as shown in Fig

49、.2 and put aside temporarily.Solder the shorting round on the pickup board in the CD pickup section.Disconnect the card wire from connector CN601 and the wire from CN801 on the CD servo board.1.2.3.4.Removing the CD servo board (See Fig.1, 2)Solder the shorting round before disconnecting the card wi

50、re extending from the pickup. If you do not follow this instruction, the pickup may be damaged.CAUTION: When reassembling, make sure to unsolder the shorting round after connecting the card wire from the pickup to the connector.CAUTION: Fig.1Fig.2CD servo boardCN801ACN606CN601CD servo boardCN601CN80