Jvc-XLR-910-SL-Service-Manual电路原理图.pdf

SERVICE MANUALCOMPACT DISC RECORDERNo.A0009Apr. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.XL-R910SLXL-R910SLArea SuffixJ - U.S.A.C - CanadaB - U.K.E - Continental EuropeEN - Northern EuropeThis service manual is printed on 100% recycled paper.ContentsSafety precautions - 1-2Disassembly method - 1-3Troubleshooting - 1-6Description of major ICs - 1-11XL-R910SL1-21. 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 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 reassembling.5. Leakage current check (Electrical shock hazard testing)After reassembling 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 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 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.XL-R910SL1-3Disassembly methodRemoving the metal cover (See Fig.1)Removing the front panel assembly (See Fig.25)1.Remove the three screws A attaching the metal coveron the back of the body.2.Remove the four screws B attaching the metal coveron both sides of the body.3.Remove the metal cover from the body by lifting therear part of the cover.ATTENTION : Do not break the front panel tab fittedto the metal cover.* Prior to performing the following procedure, remove themetal cover.1.Remove the three screws C attaching the front panelassembly on the bottom of the body and both sides ofthe body.2.Disconnect the card wire from connector CN601 on theservo control board.3.Disconnect the 4pin wire from connector CN502 on theservo control board.4.Disconnect the 3pin wire and 8pin wire from connectorACW1 and RCW2 on the main board.Please remove a tie band if necessary. Please fix the wire again with a tie band when assembling. 5.Release the two joints a on the lower part of the sidesusing a screwdriver, and remove the front panel assemblytoward the front.Fig. 2Fig. 3Fig. 4CCMetal coverB x 2AAAFig. 1B x 2CFront panel assemblyjoint aJoint aFront panel assemblyFront panel assemblyFig. 5ACW1Main boardTie bandTie bandGNCW1CN502CN701CN601DFFRCW1RCW2MechanismassemblyXL-R910SL1-4Removing the power button arm (See Fig.6)* Prior to performing the following procedure,remove the metal cover and front panel assembly.The power button arm is lifted up while holding thepower switch(orange color part) and removes.Removing the mechanism assembly(See Fig.6)* Prior to performing the following procedure,remove the metal cover and front panelassembly.1.Disconnect the card wire from connector CN501on the servo control board.2.Disconnect the 6pin wire from connector CN701on the servo control board.3.Remove the four screws D attaching themechanism assembly.*Please fix two earth wires together when youinstall the mechanism assembly. Removing the main board (See Fig.5,7)* Prior to performing the following procedure,remove the metal cover.1.Remove the four screws E attaching the eachterminal on the rear panel.2.Disconnect the 9pin,8pin and 3pin wire fromconnector RCW1,RCW2 and ACW1 on the mainboard.3.Disconnect the card wire from connector NCW1on the main board.4.Disconnect the 6pin wire from connector CN701on the servo control board.5.Remove the screw D attaching the earth wire.6.Remove the two screws F and one screw Gattaching the main board.Please remove a tie band if necessary. Please fix the wire again with a tie bandwhen assembling. Fig. 6Main boardDDDDMechanismassemblyPowerbuttonarmOrangecolor partEarth wireCN501CN701Earth wireFig. 7EE E ECord bushingFig. 5ACW1Main boardTie bandTie bandGNCW1CN502CN701CN601DFFRCW1RCW2MechanismassemblyXL-R910SL1-5Removing the power transformer (See Fig.68)* Prior to performing the following procedure,remove the metal cover.1.Power button arm is removed from power switch2.Disconnect 9pin wire from connector RCW1 onthe main board.3.The code bushing is pulled out for above. 4.Remove the four screws H attaching the powertransformer.Please remove a tie band if necessary. Please fix the wire again with a tie band whenassembling.Fig. 6MechanismassemblyPowerbuttonarmOrangecolor partTie bandFig. 8Main boardPower transformer boardPower transformerHHRCW1Tie bandFig. 7Cord bushingXL-R910SL1-6TroubleshootingPower supply / VFD (FL display) sectionWhen trouble is found in the power supply and the FL display.Check voltagepin No13,14,18,46,72 ofUIC1 front PCB: 5V(VDD)Check voltageoutput of RIC1(7805):5V?Check voltageinput of RIC1(7805):8V?Check voltagepositive of RC7(6800uF/25V)at main PCB : 12V?Check connector (UCW1)front PCB to main PCBReplace RIC1Replace RQ4,RZD4,RR5Check for RC7,RD5,RD6,RD7,RD8,RFU3,RCW1,PFU1/PFU2Check oscillationof UX1(6MHz) at frontPCBCheck voltagepin No27(p.sense)of UIC1 : 5VCheck voltageoutput of RIC3(78L05) atmain PCB : 5V?Check voltagepositive of MC1(10uF/50V):15V?Replace UX1,SC4,SC5,UIC1Check for UCW1(8P),SR3,UC7,UD1,UQ1,UC6,UR2Replace RIC3Check for MC1,MR1,MD1,RCW1,RFU3,PFU1/PFU2Check voltagepin No46 of UIC1:-30V?Check voltagenegative of RC9(100uF/500V):-30V?Check voltagenegative of RC8(100uF/100V):-42V?Check for RC8,RD9,RR9RCW1,PFU1/PFU2Check connector(UCW1)from front PCB to main PCBCheck for RR6,RZD5,RZD6,RR7,RZD7Check voltagebetween 1 and 2, between48 and 49 of VFD1:AC4V?-Check connector of UCW1-Check for RCW1,PFU1/PFU2Replace micom ,VFD1No No No NoNo No NoNoNoNo NoNoYe s Ye s Ye s Ye sYe s Ye s Ye sYe sYe sYe s Ye sYe sXL-R910SL1-7Analog output (play mode)When trouble is found in the analog signal output.Check voltagepin No2,3 of DAC(NIC1,AK4324) at mainPCB : 5V?Check voltageoutput of RIC2(78L05):5V?Check voltageinput of RIC2(78L05):8V?Check voltagepositive of RC7(6800uF/25v)at main PCB : 12V?Check NL1(10uF)Replace RIC2Replace RQ3,RZD3,RR3Check for RC7,RD5,RD6,RD7,RD8,RFU3,RCW1,PFU1/PFU2Check voltage pinNo5 of MIC1(DAC,AK4324):5V?Check voltageoutput of RIC3(78L05):5V?Check voltagepositive of MC1(10uF/50V) :15V?Check for NC20,NR20Replace RIC3Check waveinput pin No 4(MCLK:16,9344MHz),6(BCK),7(DATA),8(LRCK), of NIC1(DAC,AK4324): normal?Check waveoutput pin No 1,2,3,4, ofNCW1(17P FPC):normal?Check NR1,2,3,4Check voltagepin No 9 of NIC1(DAC,AK4324) : 0V?-Check for mute micom and RCW2No No No NoNo No NoNoNoCheck solder of NIC1NoNoYe s Ye s Ye s Ye sYe s Ye s Ye sYe sYe sCheck analogwave output of AR1,2,3,4(10k)Ye sCheck for AIC1,AIC2(4560),OP amp 4560NoCheck analogwave output at pin No1,7of AIC2(4560)Ye s-Check solder of AJA1-Check analog wave of AJA1-Check connector of audio cableNoCheck voltagebase of MQ5,MQ6(C945):0.6VYe sYe sCheck voltageof RJW2 : -8V?RJW4 : +8V?Check voltageoutput ofRC6(2200uF/25) : +12V?RC7(2200uF/25V) : -12V?No NoYe sYe sCheck for MC1,MR1,MD1,RCW1,RFU3,PFU1/PFU2-Check connecting of NCW1(17P FPC)-Replace mechanismCheck for RD1,2,3,4(IN4002)RFU1,RFU2(1A),RCW1,PFU1,PFU2Check for RQ2,RZD2,RR2,RQ1,RZD1,RR1Check for micom mute line,MR6,MQ3,MQ4,MD4,MD5,MQ1XL-R910SL1-8Digital outputWhen trouble is found in the optical output and coaxial output.Check signal(digital) input pin No 1of NIC1(74HCN04)Check signal(digital) input pin No 15of NCW1(17P)Check for MR14,NC7Check signal(digital) output pin No 4,6of NIC1(74HCU04)Check voltageof NIC1(74HCU04)pin No14:5V?No7:0V?Check voltageinput of RIC2(78L05):8V?Replace NIC1Replace RIC2Check voltagepin No2 of NOM2(optical transmitter):5V?-Check for NEF1,NEF2,NR10,NR11,NR12-Replace NOM2-Check solder of between NOM2 and NJA1-Check for optical cable and coaxial cableNo NoNo No NoNoYe s Ye sCheck voltagepositive of RC7(6800uF/25v)at main PCB : 12V?Replace RQ3,RZD3,RR3Check for RC7,RD5,RD6,RD7,RD8,RFU3(2.5A),RCW1,PFU1/PFU2NoYe sYe s Ye s Ye sYe sCheck connector to NCW1(17P)Check mechanismXL-R910SL1-9Mechanism operationWhen trouble is found in the mechanism operating. (rotation,play,tray open/close,lead)Check voltagepin No 2 of RCW3(6P)at main PCB : 8V?Check voltagepositive of RC7(6800uF/25V) : 12V?Check for RQ3,RZD3,RR3Check voltagepin No 4,6 of RCW3(6P)at main PCB : 5V?Check voltageinput of RC1(7805):8V?Check voltagepositive of RC7(6800uF/25V) : 12V?Replace RIC1Check for RQ4,RZD4,RR5No NoNo NoYe s Ye sYe sYe sCheck wavepin No3(CDR-RCT) ofUCW2(9P) at front PCBwhen power ONNoYe sCheck wavepin No49 of UCW2(9P):interface wave ?NoYe sYe s Ye sReplace mechanismCheck for RC7,RD5,RD6,RD7,RD8RFU3(2.5A),RCW1,PFU1,PFU2-Check pin No 1 of micom(UIC1)-Check connecting of UCW2(9P)XL-R910SL1-10Digital recording (CD-R/CD-RW Disc, Unfinalize condition)When trouble is found in the digital recording (optical recording).Analog recording (CD-R/CD-RW Disc, Unfinalize condition)When trouble is found in the analog recording.Check selectingfor source at front panel:opticalCheck signal(digital) input pin No11of NCW1(17P)Check voltagepin No3 of NOM1(opticalreceiver) : 5V?-Check for NR13,NC13-Check solder of NOM1,NCW1NoNo NoYe sYe s Ye s-Check connector of NCW1(17P)-Check mechanismSelecting optical mode by source keyCheck selectingmode for source at frontpanel : analogNoYe sSelecting analog mode by source keyCheck locationVR(ana.rec) at front panel: 3o'clockNoYe sAdjust volume (analog rec.)Check signal(analog) input pin No1,3 of ACW1(3P)NoYe s-Check for AC6,AC7,AC22,AD23,AC24AC25,AR25,AR26,AR27,AR28-Check solder AJA1Check signal(analog) input pin No5,6 of UVR1 atfront PCBNoYe s-Check connector UCW3Check signal(analog) input pin No1,3 of connector(4P) from mecha. to front PCBNoYe s-Check signal of UVR1-Check connector (4P) of mechanismCheck voltage of RIC2(78L05)Replace mechanism