Jvc-UXV-30-Service-Manual电路原理图.pdf

1-1UX-V30SERVICE MANUALMICRO COMPONENT SYSTEMNo.20888Dec. 2000COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.UX-V30UX-V30ContentsSafety precautionsImportant for laser productsDisassembly methodMain adjustmentFlow of functional operation until TOC readMaintenance of laser pickupReplacement of laser pickup Description of major ICs1-21-31-41-141-181-191-191-20Area SuffixThis service manual is printed on 100% recycled paper.UF ChinaAUTO REVERSEAUT O TA PE SELECT O RT APEDOWN UPMULTI CONTROLTAPE FM/AM CDSTANDBY/ONPHONESMD/AUXRECREV.MODEAHBPROTIMERCLOCKVERTICAL DISCLOADING MECHANISMCOMPACTDIGITAL AUDIOVOLUMECDOPEN/CLOSEREMOTE CONTROL RM-RXUV5RDIMMER SLEEPDISPLAY FM MODE MD/AUXAHB PROAUTOPRESET CDPROGRAM RANDOM REPEATBASS TREBLE CANCELUPSETDOWNTUNERBANDTA P EVOLUMECDMICRO COMPONENT SYSTEM UX-V301-2UX-V30Safety Precautions1. 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 eachexposed 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.). Warning1. 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!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.1-3UX-V30Important 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.1-4UX-V30Remove the eight screws A attaching the rear cover on the back of the body.Remove the two screws B attaching the rear cover on the bottom of the body.Unlock the speaker terminal and the antenna terminal, then remove the rear cover backward with releasing the hooks.1.2.3.Disassembly methodRemoving the rear cover (See Fig.1 and 2)Prior to performing the following procedure, remove the rear cover.Move the side panels in the direction of the arrow and remove them backward.1.Removing the side panels (See Fig.3 and 4)Fig.1Fig.2Fig.3Fig.4Rear coverAAAAARear coverBBSide panel (L)Side panel (R)1-5UX-V30Prior to performing the following procedure, remove the rear cover and the side panels.Disconnect the card wires from connector CN304 and CN305 on the main board on the left side of the body.Disconnect the harness from connector CN309 on the Opt, Dig.out board on the right side of the body. Cut off the band fixing the harness.Remove the two screws C attaching the cassette mechanism assembly on both sides of the body and release the two joints a.Remove the cassette mechanism assembly in the direction of the arrow.1.2.3.4.Removing the cassette mechanism assembly (See Fig.5 and 6)Prior to performing the following procedure, remove the rear cover, the side panels and the cassette mechanism assembly.Disconnect the card wire from connector CN303 and the harness from CN306 and CN307 on the main board respectively.Disconnect the harness from connector CN902 on the power transformer.Remove the screw E attaching the main board on the right side of the body.Remove the screw F and the two screws G attaching the heat sink on the back of the body.1.2.3.4.Disconnect connector CN301 and CN302 on the main board from the main body. Remove the main board upward by releasing the two joints b in the lower part of the main board.5.Removing the main board / the heat sink(See Fig.7 to 9)The heat sink can be removed even if the main board is attached to the body.ATTENTION: Fig.5Fig.6Fig.7Fig.8CCCN304CN305Joint aMain boardCassette mechanism assemblyCassette mechanism assemblyCN309Opt, Dig.out boardBandJoint aCN303CN307CN306Transformer boardCN902Main boardHeat sinkJoint bMain boardCN302 CN301Joint bE1-6UX-V30Prior to performing the following procedure, remove the rear cover, the side panels, the cassette mechanism assembly and the main board.Disconnect the card wire from connector CN732 on the LCD board.Remove the two screws D attaching the front panel assembly on the bottom of the body.Release the two joints c on the lower right and left sides of the body. Pull out the front panel assembly toward the front.1.2.3.Removing the front panel assembly (See Fig.10 to 12)Prior to performing the following procedure, remove the rear cover, the side panels, the cassette mechanism assembly, the main board and the front panel assembly.Remove the plastic rivet attaching the head phone board and release the joint d.1.Removing the head phone board (See Fig.13)Fig.9Fig.10Fig.11Fig.12Fig.13Main boardHeat sinkGGFFront panel assemblyJoint cLCD boardCN732Front panel assemblyDDJoint cFront panel assemblyJoint dPlastic rivetTuner & function board1-7UX-V30Prior to performing the following procedure, remove the rear cover, the side panels and the cassette mechanism assembly.Disconnect the card wire from connector CN1 on the tuner & function board.Remove the screw H attaching the tuner & function board.Release the two joints e and the joint f of the tuner & function board.1.2.3.Removing the tuner & function board (See Fig.14)Prior to performing the following procedure, remove the rear cover, the side panels and the cassette mechanism assembly.Disconnect the harness from connector CN902 on the power transformer.Disconnect the harness from connector CN901 on the AC supply board.Remove the four screws I attaching the power transformer.1.2.3.Removing the power transformer (See Fig.15)*Prior to performing the following procedure, remove the rear cover, the side panels and the cassette mechanism assembly.Disconnect the harness from connector CN901 on the AC supply board.Remove the screw F attaching the heat sink on the back of the body (Refer to Fig.9).Remove the two screws J attaching the AC supply board.1.2.3.Removing the AC supply board(See Fig.15)To remove the AC supply board efficiently, remove the main board in advance.ATTENTION: Fig.14Fig.15Joint eJoint fTuner & function boardCN1HPower transformer boardMain boardHeat sinkAC supply boardCN902CN901I IJJ1-8UX-V30Remove the two screws K attaching the Opt.Dig.out board on the side of the cassette mechanism assembly.1.Removing the Opt.Dig.out board (See Fig.16)Prior to performing the following procedure, remove the Opt.Dig.out board.Press the eject button on the front side of the cassette mechanism assembly to open the cassette door.Remove the four screws L attaching the cassette mechanism assembly on the back of the assembly. 1.2.Removing the cassette mechanism assembly (See Fig.16 and 17)Prior to performing the following procedure, remove the rear cover, the side panels and the cassette mechanism assembly.Fig.16Fig.17Opt, Dig.out boardCassette doorKEject buttonCassette mechanismLLLL1-9UX-V30Disconnect the harness from connector CN721 and CN722, and the card wire from CN766 on the LCD board on the back of the front panel assembly.Remove the five screws M attaching the CD mechanism cover to the front panel. Remove the CD mechanism cover together with the CD mechanism assembly.Release the harness from each hook on the CD mechanism cover.Remove the five screws N attaching the CD mechanism cover and the CD mechanism case. Release the three joints g of the CD mechanism cover and the CD mechanism case by pushing the joint hooks inward.Disconnect the card wire from connector CN603 and the harness from CN605 on the CD servo control board.Remove the CD mechanism assembly from the CD mechanism cover by pulling out it from the three bosses h.1.2.3.4.5.6.Removing the CD mechanism assembly (See Fig.18 to 21)Remove the screw O attaching the LED board (A).1.Removing the LED board (A) (See Fig.21)Prior to performing the following procedure, remove the rear cover, the side panels, the cassette mechanism assembly, the main board and the front panel assembly.Fig.18Fig.19Fig.20Fig.21MMMRCD mechanism cover (CD mechanism assembly)LCD boardCN766CN721CN722Loading motorBeltJoint gCD mechanismcaseLoading motorCD mechanism coverNJoint gJoint gNNNCD mechanism coverCD mechanism caseJoint gCD mechanism coverLCD board (A)CD servo control boardCN603CN6051-10UX-V30Prior to performing the following procedure, remove the CD mechanism assembly.Remove the screw P attaching the LED board (B).1.Removing the LED board (B) (See Fig.22)Prior to performing the following procedure, remove the LCD board assembly.Remove the eight screws T attaching the operation switch board.1.Removing the operation switch board (See Fig.24)Release the hook i fixing the CD door switch board to the CD mechanism cover.1.Removing the CD door switch board (See Fig.22)Prior to performing the following procedure, remove the CD mechanism assembly and the LED board (A) / (B).Remove the two screws Q attaching the CD servo control board.Pull out the CD servo control board in the direction of the arrow by releasing the two joints j.1.2.Removing the CD servo control board (See Fig.22)Remove the belt and the two screws R attaching the loading motor on the back of the front panel assembly.1.Removing the loading motor (See Fig.18)Prior to performing the following procedure, remove the CD mechanism cover (CD mechanism assembly).Remove the two screws S attaching the LCD board assembly.Disconnect connector CN781 on the LCD board assembly from the operation switch board.1.2.Removing the LCD board assembly (See Fig.23)Fig.18Fig.22Fig.23Fig.24Joint jLCD board (A)CD servo controlboardCD door switch board Hook iLCD board (B)PQOQMMMRCD mechanism cover (CD mechanism assembly)LCD boardCN766CN721CN722Loading motorBeltLCD board assemblyOperation switch boardSCN781TTTOperation switch board