JVC-UXJ50-cs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.No.220322003/03UX-J50MICRO COMPONENT SYSTEM22032200303UX-J50TABLE OF CONTENTS1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22Disassembly m

2、ethod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、1-194Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25SP-UXJ50CA-UXJ50RM-SUXJ50R REMOTE CONTROLSP-UXJ50Area SuffixB - U.K.E - Continental EuropeEN - Northern EuropeRadioFans.CN 收音机爱 好者资料库UX-J501-

4、2 (No.22032)SECTION 1Important Safety Precautions1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purposes.For continued protection, no changes should be made to theoriginal design unless authorized in writing by the

5、 man-ufacturer. Replacement parts must be identical to thoseused in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design altera

6、tions or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are o

7、ften not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these special safetycharacteristics are identified in the Parts List of Service Manu-al. Elect

8、rical components having such features are iden-tified by shading on the schematics and by () on theParts List in the Service Manual. The use of a substitute re-placement which does not have the same safety character-istics as the recommended replacement parts shown in theParts List of Service Manual

9、 may create shock, fire, or oth-er hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is

10、 required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassembling.(5) Leakage shock hazard testing)After reassembling the product, always perform an isolationcheck on the exposed metal parts of the product (antennat

11、erminals, knobs, metal cabinet, screw heads, headphonejack, control shafts, etc.) to be sure the product is safe tooperate 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 aLeakage Current Tester, m

12、easure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outl

13、et. Use an ACvoltmeter having, 1,000 ohms per volt or more sensitivity inthe following manner. Connect a 1,500 ohm 10W resistorparalleled by a 0.15 F AC-type capacitor between anexposed metal part and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the

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

15、sponds to 0.5 mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety s

16、tandards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case

17、 of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the mark nearby are c

18、riticalfor safety. When replacing them, be sure to use the parts of the same typeand rating as specified by the manufacturer. (Except the JC version)RadioFans.CN 收音机爱 好者资料库UX-J50(No.22032)1-31.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits

19、and components specially for safety purposes. For con-tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in the original circuits.(2) Any unauthorised design alterations or additions

20、 will void the manufacturers guarantee; furthermore the manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must neverbe replaced by

21、parts other than those listed in the manual. Please note however that many electrical and mechanical parts inthe product have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother than specified by the manufacturer may not have the sam

22、e safety characteristics as the recommended replacement partsshown in the Parts List of the Service Manual and 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 temperat

23、ure parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service isrequired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned tonormal, after re-assembling.1.5.1Warning(1) Service should be pe

24、rformed by qualified personnel only.(2) This equipment has been designed and manufactured to meet international safety standards.(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.(4) Repairs must be made in accordance with the relevant safety sta

25、ndards.(5) It is essential that safety critical components are replaced by approved parts.(6) If mains voltage selector is provided, check setting for local voltage.Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of prefor

26、ming repair of this system.UX-J501-4 (No.22032)1.6 Preventing 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). Take care to prevent this when perfor

27、ming repairs.1.6.1 Grounding to prevent damage by static electricityStatic 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 repairs are being performed. (1) Ground the workbenchGround the wor

28、kbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfUse an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to mai

29、ntain quality during transport and before installation, both sides of the laser diode on the replacement opticalpickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optic

30、al pickup. The testers internal power source can easilydestroy the laser diode. 1.7 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,

31、 etc. after replacing the optical pickup. For specific details, refer to the replace-ment procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a timewhen attaching it to the connector. (3) Handle the flexible cable carefully as it may br

32、eak when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.8 Attention when traverse unit is decomposed*Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land sections bef

33、ore the flexible wire is disconnected from the connector CN101 on the CD servo board. (If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the flex

34、ible wire.CN601 onmechanismboardShorting roundShorting roundFlexible wireUX-J50(No.22032)1-51.9 Important for laser products (1) CLASS 1 LASER PRODUCT(2) DANGER : Invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam.(3) CAUTION : There are no serviceabl

35、e parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace thecomplete Laser Unit if it malfunctions.(4) CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches which prevent emission of radiation when the drawer is open andthe safety inter

36、locks have failed or are de feated. It is dangerous to defeat the safety switches.(5) CAUTION : If safety switches malfunction, the laser is ableto function.(6) CAUTION : Use of controls, adjustments or performance ofprocedures other than those specified herein may result inhazardous radiation expos

37、ure.CAUTIONPlease use enough caution not to see the beam directlyor touch it in case of anadjustment or operation check.VARNINGOsynlig laserstrlning r denna del r ppnad och sprren rurkopplad. Betrakta ej strlen.VAROAvattaessa ja suojalukitus ohitettaessa olet alttiina nkymt-tmlle lasersteilylle. l k

38、atso steeseen.ADVARSELUsynlig laserstrling ved bning, nr sikkerhedsafbrydere erude af funktion. Undg udsasttelse for strling.ADVARSELUsynlig laserstrling ved pning, nr sikkerhetsbryteren er avs-lott. unng utsettelse for strling.REPRODUCTION AND POSITION OF LABELSCaution labelUX-J501-6 (No.22032)SECT

39、ION 2Disassembly method2.1 Main body2.1.1Removing the metal cover (See Fig.13)(1) Remove the six screws A on the back of the main body.(2) Remove the two screws B on each side and remove themetal cover in the direction of the arrow.Fig.1Fig.2Fig.3Metal coverAAABBUX-J50(No.22032)1-72.1.2Removing the

40、rear cover (See Fig.4)(1) Remove the two screws C attaching the rear cover.Fig.42.1.3Removing the rear panel / fan assembly (See Fig.5,6) Prior to performing the following procedure, remove the metalcover and the rear cover.(1) Remove the nine screws D attaching the rear panel. Re-lease the two join

41、ts a on the rear side and the two jointsb on each side.(2) Remove the two screws E attaching the fan bracket andrelease the two joints c on the rear panel, and remove.(3) Disconnect the wire from the connector CN916 on the mainboard.Fig.5Fig.6CRear coverRear panelFan assemblyDDDDEEccabbMain boardCN9

42、16UX-J501-8 (No.22032)2.1.4Removing the tuner board (See Fig.7) Prior to performing the following procedure, remove the metalcover.(1) Disconnect the card wire from the connector CN1 on thetuner board.(2) Remove the two screws F on the rear side and the screwG in the side.Fig.72.1.5Removing the CD-R

43、/RW mechanism assembly (See Fig.8) Prior to performing the following procedure, remove the metalcover, the rear cover, the rear panel and the tuner board.(1) Disconnect the card wire from the connector CN903,CN902 and CN904 on the main board.(2) Pull the joint d in the direction of the arrow and rem

44、ove theCD-R/RW mechanism assembly backward while releasingthe joint e .Fig.8Tuner boardCN1FGCN902CN904CN903CD-R/RW mechanism assemblyMain boardddeUX-J50(No.22032)1-92.1.6Removing the main board / the heat sink board / thespeaker jack board (See Fig.911) Prior to performing the following procedure, r

45、emove the metalcover, the rear cover, the rear panel, the tuner board and theCD-R/RW mechanism assembly.(1) Remove the two screws H attaching the main board.(2) Disconnect the card wire from the connectorCN900,CN901,CN930,CN931 and CN932, and disconnectthe flat wire from the connector CN913,CN917 an

46、d CN918on the main board.(3) Remove the band and disconnect the flat wire from theconnector CN951 on the power transformer assembly, andthen remove the main board / the heat sink board from thebody.(4) Release the two joints f of the main board and disconnectthe connector CN944 and CN945 of the heat

47、 sink boardfrom the connector CN912 and CN911 of the main boardrespectively, and remove.Fig.9Fig.10Fig.11HfMain boardPower transformer assemblyCN951CN930CN917CN900CN901CN918CN931CN913CN932BandMain boardCN944CN945CN912CN911Heat sink boardMain boardUX-J501-10 (No.22032)2.1.7Removing the power transfor

48、mer assembly (See Fig.12) Prior to performing the following procedure, remove the metalcover, the rear cover, the rear panel, the CD-R/RW mecha-nism assembly and the main board.(1) Disconnect the power cord from the connector J1000 onthe power transformer assembly.(2) Remove the four screws J .Fig.1

49、22.1.8Removing the front panel assembly (See Fig.13,14) Prior to performing the following procedure, remove the metalcover.(1) Remove the two screws K on each side. Release the twojoints g on the both sides and lift the front panel assemblyto release the joint h .(2) Disconnect the card wire from th

50、e connector CN900,CN901, CN930, CN931 and CN932 on the main board.Fig.13Fig.14Power transformer assemblyJ1000JJKgFront panel assemblyKghFront panel assemblyCN932CN931CN930CN900CN901Main boardUX-J50(No.22032)1-112.1.9Removing the phones board (See Fig.15) Prior to performing procedure, remove the met