Jvc-RVB-550-Service-Manual电路原理图.pdf
SERVICE MANUALCD PORTABLE SYSTEMNo.20826CJan. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.RV-B550BURV-B550BUArea SuffixContentsSafety precautions .1-2Importance administering point on the safety . 1-3 Important for laser products . 1-4Preventing static electricity . 1-5Disassembly method . 1-6Adjustment method . 1-15Flow of functional operation until TOC read . 1-19Maintenance of laser pickup . 1-20Replacement of laser pickup .1-20Description of major ICs . 1-2129UY . ArgentinaThis service manual adds UY version to the service manual(RV-B550BU No.20826) previously issued.This service manual is made from 100% recycled paper.SLEEPCLOCK TIMERTIMERON/OFFPROGRAMRANDOMREPEATAUTOPRESETDISPLAYREVERSE MODE MULTI CONTROLREW FFRM-RXVB55REMOTE CONTROLTAPE TUNER BANDFM MODEC DDOWN UP SETAUXVOLUMEAHB PROSOUND ACSSupplementRV-B550BU1-2Safety 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 current 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 exposedmetal 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 measure 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.RV-B550BU1-3Importance administering point on the safety RV-B550J ONLYFull Fuse Replacement MarkingGraphic symbol mark (This symbol means fast blow type fuse.)should be read as follows ;FUSE CAUTIONFOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;F1901 : 1.0-A, 250-VF1902 : 6.3-A, 125-VF1903 : 6.3-A, 125-VF1904 : 6.3-A, 125-VF1901 : 1.0-A, 250-VF1902 : 6.3-A, 125-VF1903 : 6.3-A, 125-VF1904 : 6.3-A, 125-VRV-B550J SEULEMENTMarquage Pour Le Remplacement Complet De FusiblePRECAUTIONS SUR LES FUSIBLESPOUR UNE PROTECTION CONTINUE CONTRE DES RISQUES D'INCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.)doit etre interprete comme suit ;Note : It's means “J“ for U.S.A. and Canada market model. RV-B550BU1-4Important 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. Undgåudsættelse for stråling.ADVARSEL : Usynlig laserstråling ved åpning,nårsikkerhetsbryteren er avslott. unngå utsettelse for stråling.REPRODUCTION AND POSITION OF LABELSWARNING LABEL 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 alttiinanäkymättömälle lasersäteilylle.Älä katso säteeseen. (d)ADVARSEL :Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. (f)CLASS 1LASER PRODUCT!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.RV-B550BU1-5Preventing 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 electricityIn the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of the work environment.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 itConductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapAttention when CD mecanism assembly is decomposed1. Remove CD mechanism assembly. 2. Remove the four screws on the microcomputer board.3. Disconnect the connector CN907 and CN602 on the microcomputer board. 4. The microcomputer board is put up as shown in Fig.1. 5. Solder is put up before the card wire is removed from connector CN601on the maicroconputer board as shown in Fig. 2. (When the wire is removed without putting up solder, the CD pick-upassembly might destroy.) 6. Please remove solder after connecting the card wire with CN601 whenyou install picking up in the substrate.*Please refer to “Disassembly method“ in the text for pick-up and how to detach the CD mechanism. SolderingFig.1Fig.2CD changermechanismassemblyMicrocomputerboardCard wireFlexible cableRV-B550BU1-6Remove the six screws A attaching the side grille on the left side of the body and pull out the side grille from the body.Similarly, remove the side grille on the right side.1.2.When reassembling, make sure that connector CN633 on the rear cabinet is connected to the speaker terminal on the front cabinet.Attention: Disassembly methodRemoving the side grilles (See Fig.1 and 2)Prior to performing the following procedure, remove the right and left side grilles.Remove the battery cover on the back of the body.Remove the eight screws B on the back of the body and detach the front cabinet assembly and the rear cabinet assembly. Disconnect the connector CN904 on the LED (Illumination) board.1.2.Removing the front cabinet assembly and the rear cabinet assembly (See Fig.3 and 3a)Fig.1Fig.2Fig.3Fig.3aSide grille (left)A ASide grille (right)A ABBBBPush PushBattery coverCN904LED (Illumination) boardRV-B550BU1-7The CD unit assembly cannot be removed if the cassette mechanism assembly has not been removed.Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly and the cassette mechanism assembly.Remove the cassette chassis (See Fig.6).Disconnect the card wires from connector CN631 and CN632 on the amplifier board.Disconnect the card wires from connector CN403 on the microcomputer board.Remove the two screws D attaching the CD mechanism assembly on the back of the rear cabinet(See Fig.8).Pull out the CD unit assembly toward the front.1.2.3.4.5.Removing the CD unit assembly (See Fig.6 to 8)Prior to performing the following procedure, remove the right and left side grilles and the front cabinet assembly.Disconnect the card wires from connector CN405 and CN406 on the microcomputer board located on the underside of the CD unit of the rear cabinet assembly.Remove the four screws C attaching head shield and the cassette mechanism assembly.1.2.Removing the cassette mechanism assembly (See Fig.4 and 5)Fig.4Fig.5CN406CN405Microcomputer boardCassette mechanism assemblyCassette chassisCassette mechanism assemblyCCCD unit assemblyCN403Microcomputer boardCN632CN631amplifier boardCassette chassisRear cabinet DCD unit assemblyFig.6Fig.8Fig.7Head shieldRV-B550BU1-8Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly, the cassette mechanism assembly and the cassette chassis.Disconnect the harness from connector CN192 and CN193 on the power supply board respectively.Remove the four screws F attaching the power transformer assembly.1.2.Remove the power transformer assembly(See Fig.10)Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly, the cassette mechanism assembly, the cassette chassis and the CD unit assembly.Disconnect the 5pin harness from connector CN191 on the power supply board.Remove the two screws G and the one screw Hattaching the amplifier board.Disconnect the harness from connector CN192 and CN193 on the power supply board respectively.Remove the two screws I attaching the power supply board.Pull out the battery board.1.2.3.4.5.Remove the amplifier board, the power supply board and the battery board (See Fig.11)Prior to performing the following procedure, remove the right and left side grilles, the front cabinet assembly.Disconnect the card wire from connector CN403 on the microcomputer board.Remove the screw E attaching the tuner board holder and pull out the tuner board holder together with the tuner board. Disconnect the antenna wire from TP1.1.2.Removi
