Jvc-RXDV-3-SL-Service-Manual电路原理图.pdf
SERVICE MANUALHOME THEATER DVD/CD RECEIVERNo.21124Jul. 2002COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.RX-DV3SLRX-DV3SLContentsSafety precautions -Importance administering point on the safety -Preventing static electricity -Disassembly method -Adjustment method -Description of major ICs -Area suffixJ - U.S.A.1-21-31-41-51-141-1626MASTER VOLUMEDVD/SUPER VCD/VCD/CDINPUT ATT. REC MODEINPUTANALOG/DIGITALCOMPACTSUPER VIDEOSETTING ADJUST MEMORYRX-DV3 HOME THEATER DVD/CD RECEIVERON/OFFSURROUNDMODEFM/AMTAPE/CDRSOURCE NAMETVVCRDBSDVDCONTROLSTANDBYSTANDBY/ON+231564897VFP10/0 +10100+ TV RETURNVCRDBS DVDTV/VIDEO REW/ TUNING /FFREPEAT SLEEPVCRDBS TV AUDIOTAPETV CDR FM/AMFM MODE STROBEEFFECT TV/DBS CH +ANALOG/DIGITAL TESTAUDIOINPUTSUBTITLECHOICEENTERON SCREENANGLEZOOMDIGEST TOP MENU MENURETURNSURR ON/OFFSURR MODEDIMMERMUTING TV VOL VOLUME SUBWOOFER +HOME THEATERDVD/CD RECEIVERSOUNDSTANDBY/ONCENTERREAR·LREAR·RREMOTE CONTROL RM-SRXDV3JPROGRESSIVERX-DV3SL1-21. 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.)RX-DV3SL1-3Caution: For continued protection against risk offire, replace only with same type 5A/125V forF101, 2A/125V for F202 and F203.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F101 comme le meme typeque 5A/125V, et 2A/125V pour F131 et F132.Ce sont des fusibles suretes qui functionnes rapide.Importance administering point on the safety Secondary partsPrimary partLVA10332-A2LVA10330-15A-125VF 1015A-125V2A-125VF 1312A-125VF 132RX-DV3SL1-4Preventing 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 In 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 it.Conductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapAttention when traverse unit is decomposedBecause the DVD/ CD mechanism assembly of this model is a unit component, the individual component parts consisting of the DVD / CD mechanism assembly are not supplied separately.If you need to decompose the traverse unit, short-circuit the connector of the flexible board by using a metal clip and the like prior to decomposing the traverse unit.DVD / CDholder mechanismDVD / CD unitPickup unitconnectorSolderingpointsCard wireFig.1Fig.2RX-DV3SL1-5Remove the four screws marked A attaching the top cover on both sides of the body.Remove the three screws marked B on the back of the body.Remove the top cover from behind in the direction of 1.2.3.Disassembly methodRemoving the top cover (See Fig.1)Prior to performing the following procedures, remove the top cover.Remove the power cord stopper from the rear panel by moving it in the direction of the arrow.Remove the twenty one screws marked D attaching each boards to the rear panel on the back of the body.Remove the three screws marked E attaching the rear panel on the back of the body.1.2.3.Removing the rear panel (See Fig.5)Prior to performing the following procedures, remove the top cover.Disconnect the card wire from the connector CN114 on the main board.Remove the five screws marked C attaching the front panel assembly on the bottom of the body. Detach the front panel assembly toward the front.Release the two joints marked a on both sides on the bottom of the body using a screwdriver. 1.2.3.Removing the front panel assembly (See Fig.2 to 4)Fig.1Fig.2Fig.3Fig.4A 2A 2BTop coverCPowersupply boardDSPboardMainboardTie bandDECord stopperCFront panel assemblyFront panel assemblyDRear panelCN114EEAmplifierboardPower/Fuse boardCN201Joint aFig.5DDRX-DV3SL1-6Prior to performing the following procedures, remove the top cover and rear panel.Cut off the tie band fixing the harness.Disconnect the DSP board from the connector CN612 on the main board,Disconnect the card wire frome the connecter CN614 on the main board.Disconnect the S-video board from the connector CN412 on the main board.1.2.3.4.Removing each board connected to the rear side of the main board(See Fig.6 to 10)Fig.6Fig.7Fig.8DSPboardAmplifierboardPower/FuseboardDSP boardCN412CN201CN612CN241CN212CN612TunerboardCN612CN602TiebandCN212F S-videoboardCN602Amplifier boardCN212G CN231CN241DSPboardS-videoboardAmplifier boardCN231Fig.9CN612CN212S-videoboardCN231CN241Fig.10CN231CN241MainboardCN212CN612CN412TunerboardAmplifier boardFront panel assemblyRX-DV3SL1-7Remove the six screws marked H attaching the heat sink.Unsolder the two power ICs solder points attaching the rear side of the amplifier board.Pull out the amplifier board from the bracket hooks on the heat sink. 1.2.3.Removing the power ICs (See Fig.13, 14)Prior to performing the following procedures, remove the top cover, and rear panel.Disconnect the amplifier board from the connector CN201.Disconnect the amplifier board from the connector CN212 on the main board.Disconnect the amplifier board from the wire connected to the connector CN231 and CN241 on the main board.Disconnect the screws marked F frome the ground wire attaching the amplifier board on the fan bracket.Disconnect the four screws G attaching the amplifier board on the body.1.2.3.4.5.Removing the amplifier board (See Fig.11, 12)Fig.11Fig.12Fig.14Fig.13Amplifier boardrear sideHeat sink H HPower ICs solder pointsHeat sinkFookFookAmplifier boardDSPboardAmplifierboardCN201CN612CN602TiebandCN212F G CN231CN241CN231CN241CN212MainboardRX-DV3SL1-8Prior to performing the following procedures, remove the top cover, rear cover and DSP board.Remove the DVD / CD unit dust proof cover attaching on the main board. Remove the three screws marked I attaching the DVD /CD unit.Disconnect the connectors CN512 and CN513 on the main board.1.2.3.Removing the DVD CD unit (See Fig.15)Prior to performing the following procedures, remove the top cover, rear cover, DSP board, amplifier board S-video board and fan bracket.If necessary, cut off the tie band fixing the harness.Disconnect the card wire from the connector CN115 on the power supply board.Disconnect the harness connected to the connector CN111 on the power supply board. Disconnect the harness connected to the connector CN121 on the main board.Remove the four screws marked K attaching the power supply board on the body.Unsolder the solder points at the three harnesses connected to the power supply board.1.2.3.4.5.6.Removing the power supply board (See Fig.17)Prior to performing the following procedures, remove the top cover, rear cover, DSP board, amplifier board and S-video board.If necessary, cut off the tie band fixing the harness.Remove the two screws marked J attaching the fan bracket on the body.Remove the harness bands fixing the harness on the fan bracket. Disconnect the connector CN111 on the power supply board.Disconnect the connector CN122 on the main board.1.2.3.4.5.Removing the fan bracket (See Fig.16)Fig.15Fig.16ICN512CN513Dust proof coverIDVD / CDunitMainboardTiebandPowersupplyboardFanbracketJHarness bandsCN122CN111Fig.17PowersupplyboardKKCN121CN111CN115CN121CN115CN122TiebandSolderpointsMainboardRX-DV3SL1-9Prior to performing the following procedure, remove the top cover and rear panel.Disconnect the harness connected to the connector CN101 on the power / fuse board (If necessary, cut off the band fixing the harness on the side of the base chassis).Unsolder the power cord and other harnesses connected to the power / fuse board.Remove the two screws marked M attaching the power / fuse board on the body.1.2.3.Removing the power / fuse board(See Fig.19)Prior to performing the following procedures, remove the top cover and rear panel.If necessary, cut off the tie band fixing the harness.Disconnect the harness from the connector CN101 on the power / fuse board.Disconnect the harness from the connectors CN111 andCN121 on the power supply board and main board.Unsolder the three harnesses connected to the power supply board.Remove the four screws marked L attaching the power transformer on the body.1.2.3.4.5.Removing the power transformer(See Fig.18, 19)Prior to performing the following procedures, remove the top cover, rear cover, front panel assembly and power supply board.Disconnect the harness connected to the connector CN291 on the main board (If necessary, remove the amplifier board and fan bracket).Remove the screw marked N attaching the headphones board on the body.1.2.Removing the headphones board(See Fig.20)Fig.18Fig.19LSolderpointsLPower / Fuse boardPower cordPower transformerPW102PW101Power / Fuse boardPower transformerCN101PW103PowersupplyboardCN121CN111CN115CN122TiebandS
