Jvc-UXL-46-V-Service-Manual电路原理图.pdf

1-1UX-L46V/UX-L36VSERVICE MANUALCOMPACT COMPONENT SYSTEMNo.21143Sep. 2002COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.UX-L46V/UX-L36VUX-L46V/UX-L36VSafety precautionsPreventing static electricityImportant for laser productsDisassembly methodAdjustment methodContentsFlow of functional operation until TOC read (CD)Maintenance of laser pickupReplacement of laser pickup Description of major ICs1-21-31-41-51-211-251-261-261-2746US - SingaporeUN - AseanUX - Saudi ArabiaUF - ChinaArea Suffix UX-L46V/UX-L36VSP-UXL36V SP-UXL36VCA-UXL36VSTANDBY/ONDISPLAYCLOCK/TIMERSLEEPBASS TREBLEDOWN CANCELSETCDRETURN PRGM RANDOM REPEATVIDEOINTROONSCREEN AHB PRODIGITALECHO DIMMERVOLUMEREV.MODE FM MODE AUTOPRESET14710258369+10RM-SUXL36V REMOTE CONTROLUPCD / TAPE FM/AM AUX/MDKARAOKEPBCSTILLREC REV. MODE AHB PRO.VOLUMERETURN VCD NUMBERPHONESAUTO REVERSECD TAPE FM/AMMICRO COMPONENT SYSTEM UX-L36VCLOCK/TIMER AUX/MDDOWN UPSTANDBY / ON+PUSHOPEN NEXTPREVNEXTPREVMPXSELECTSP-UXL46V SP-UXL46VCA-UXL46VSTANDBY/ONDISPLAYCLOCK/TIMERSLEEPBASS TREBLEDOWN CANCELSETCD/SELECTRETURN PRGM RANDOM REPEATVIDEOINTROONSCREEN SURROUND AHB PRODIGITALECHO DIMMERVOLUMEREV.MODE FM MODE AUTOPRESET14710258369+10RM-SUXL46V REMOTE CONTROLUPKARAOKEPBCSTILLREC SURROUND AHB PRO.VOLUMERETURN VCD NUMBERPHONESAUTO REVERSECD TAPE FM/AMMICRO COMPONENT SYSTEM UX-L46VCLOCK/TIMER AUX/MDDOWN UPSTANDBY / ON+PUSHOPEN NEXTPREVNEXTPREVMPXAUX/MDFM/AMTAPE/ CDSELECTCOMPACTDIGITAL VIDEO1-2UX-L46V/UX-L36V1. 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 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, 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.). 1. 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!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 component 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.)1-3UX-L46V/UX-L36VPreventing 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 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 repairs are being performed. 2-1 Ground the workbenchGround 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 yourselfUse 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 tester's 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 itAttention when traverse unit is decomposed1.Solder is put up before the card wire is removed from connector onthe CD substrate as shown in Figure. (When the wire is removed without putting up solder, the CD pick-upassembly 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 pick-up and how todetach the substrate. (caption)Anti-static wrist strapConductive material (conductive sheet) or iron plateCD pickupPickup boardShorting round(Soldering)1-4UX-L46V/UX-L36VImportant 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 defeated. 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 laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen.VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.ADVARSEL : Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.ADVARSEL : Usynlig laserstråling ved åpning,når sikkerhetsbryteren er avslott. unngå utsettelse for stråling.REPRODUCTION AND POSITION OF LABELSWARNING LABEL!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.DANGER : Invisibie laser radiation when open and interlock or defeated.AVOID DIRECT EXPOSURE TO BEAM (e)VARNING : Osynlig laserstrålning är denna del är öppnad och spårren ärurkopplad. Betrakta ej strålen. (s)VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen. (d)ADVARSEL :Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. (f)CLASS 1LASER PRODUCT1-5UX-L46V/UX-L36VPull out the microphone volume knob on the rear top of the body.Remove 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.1.2.3.Disassembly methodRemoving the Metal cover(See Fig.14)Fig.2Fig.1Fig.3 Fig.4BBAAAMicrophone volume knobMetal coverMetal coverMetal cover1-6UX-L46V/UX-L36VRemove the metal cover.Remove the two screws C retaining the rear cover.1.Removing the Rear cover(See Fig.5)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 and the joint b on each side.Disconnect the wire from connector CN919 on the main board of the body.The rear panel comes off with the microphone volume board.1.2.Removing the Rear panel(See Fig.6,7)Prior to performing the following procedure, remove the metal cover, rear cover and the rear panel.Remove the two screws E retaining the mic volume board on the back of the rear panel.Disconnect the wire from connector CN919 on the main board.1.2.Removing the mic volume board(See Fig.7) Fig.6Fig.7DDDD DEDaabbFig.5CCMain boardCN919Microphne volume board1-7UX-L46V/UX-L36VRemove the metal cover.Disconnect the card wire from connector CN1 on the tuner board.Remove the two screws F on the rear side and the screw G on the side.1.2.Removing the Tuner board(See Fig.8)Remove the metal cover.Disconnect the shield wire from connector CN905 on the optical digital board.Remove the screw H on the rear side and the screw I on the upper side.1.2.Removing the Optical digital board(See Fig.9)Remove the 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.Removing the CD-R/RW mechanism assembly(See Fig.10)Fig.8Fig.9CN1CN905Tuner boardOptical digital boardF GHIFig.10CD-R/RW mechanismassemblyMain board CN904 CN903cd1-8UX-L46V/UX-L36VRemove 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 assembly.1.Removing the Main board/ the Heat sink board (See Fig.1113)Disconnect the vocal board from connector CN920 on the main board.Remove the two screws I attaching 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 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.Remove the two screws J attaching the heat sink bracket and heat sink board.2.3.4.5.6.7.Refer to the method of removing the CD-R/RW mechanism assembly and Fig.8.REFERENCE: The vocal board can be detached without removing the main board.REFERENCE: Fig.11Fig.12CN916Optical digital boardCN905CN902 CN904CD-R/RW mechanism assemblyCN903CN915Main boardCN920Fig.14CN945CN944Main boardMain boardVocal boardHeat sink boardHeat sink I IeCN900CN901CN913CN934CN933CN935CN917CN951Fig.13fMain boardHeat sinkPower transformerassemblyCN931J1-9UX-L46V/UX-L36VRemove the metal 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 K.1.2.Removing the Power transformer assembly (See Fig.15)J1000Power transformer assemblyFig.15KKK1-10UX-L46V/UX-L36VRemove the metal cover.Remove the screw L 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 mechanism board.1.2.3.Removing the Front panel assembly(See Fig.1619)Fig.16Fig.17Fig.18Fig.19Main boardFront panelassemblyFront panelassemblyCN935CN931CN933CN934CN34 CN33Cassette mechanism boardCassette mechanism assemblyLLhhhgghg