Jvc-UXJ-60-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.No.220292003/03UX-J60MICRO COMPONENT SYSTEM22029200303UX-J60TABLE OF CONTENTS1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-194 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25Area SuffixB - U.K.E - Continental EuropeEN - Northern EuropeSP-UXJ60CA-UXJ60RM-SUXJ60R REMOTE CONTROLSP-UXJ60UX-J601-2 (No.22029)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 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 alterations 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 often 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. Electrical 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 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 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 (antennaterminals, 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 a“Leakage Current Tester“, measure 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 outlet. 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 µF 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 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 corresponds 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 standards.(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 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 criticalfor safety. When replacing them, be sure to use the parts of the same typeand rating as specified by the manufacturer. (Except the JC version)UX-J60(No.22029)1-31.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits 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 will void the manufacturer's 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 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 same 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 temperature 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.1.5.1 Warning(1) Service should be performed 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 standards.(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 preforming repair of this system.UX-J601-4 (No.22029)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 performing 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 workbench 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 maintain 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 optical pickup. The tester's 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, 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 break 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 before 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 flexible wire.CN601 onmechanismboardShorting roundShorting roundFlexible wireUX-J60(No.22029)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 serviceable 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 interlocks 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 exposure.CAUTIONPlease use enough caution not to see the beam directlyor touch it in case of anadjustment or operation check.VARNINGOsynlig laserstrålning är denna del är öppnad och spårren ärurkopplad. Betrakta ej strålen.VAROAvattaessa ja suojalukitus ohitettaessa olet alttiina näkymät-tömälle lasersäteilylle. Älä katso säteeseen.ADVARSELUsynlig laserstråling ved åbning, når sikkerhedsafbrydere erude af funktion. Undgå udsasttelse for stråling.ADVARSELUsynlig laserstråling ved åpning, når sikkerhetsbryteren er avs-lott. unngå utsettelse for stråling.REPRODUCTION AND POSITION OF LABELSCaution labelUX-J601-6 (No.22029)SECTION 2Disassembly method2.1 Main body2.1.1 Removing 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-J60(No.22029)1-72.1.2 Removing the rear cover (See Fig.4)(1) Remove the two screws C attaching the rear cover.Fig.42.1.3 Removing 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 eleven screws D attaching the rear panel. Re-lease the two joints 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 assemblyDDDDDEEccab bMain boardCN916UX-J601-8 (No.22029)2.1.4 Removing 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.72.1.5 Removing the CD-R/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 remove theCD-R/RW mechanism assembly backward while releasingthe joint e .Fig.8Tuner boardCN1FGCN902CN904CN903CD-R/RW mechanism assemblyMain boardddeUX-J60(No.22029)1-92.1.6 Removing the main board / the heat sink board / thespeaker jack board (See Fig.912) Prior to performing the following procedure, remove 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 connector CN900,CN901, CN930, CN931 and CN932, and disconnect theflat wire from the connector CN913, CN917 and CN918 onthe 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 / thespeaker jack board from the body.(4) Release the two joints f of the main board and disconnectthe connector CN944 and CN945 of the heat sink boardfrom the connector CN912 and CN911 of the main boardrespectively, and disconnect the flat wire from the connec-tor CN914 and CN915, and remove.(5) Remove the screw I attaching the speaker jack board anddisconnect the flat wire from the connector CN946 andCN947 on the heat sink board, and then remove the speak-er jack board.Fig.9Fig.10Fig.11Fig.12HfPower transformer assemblyCN951CN930CN917CN900CN901CN918CN931CN913CN932BandMain boardCN944CN945CN912CN911CN915CN914ICN946CN947Speaker jack boardHeat sink boardMain boardSpeaker jack boardUX-J601-10 (No.22029)2.1.7 Removing the power transformer assembly (See Fig.13) 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.132.1.8 Removing the front panel assembly (See Fig.14,15) Prior to performing the following procedure, remove the metalcover.(1) Remove the two screws K on eac