NAD-C541-cd-sm 维修电路原理图.pdf

NADSERVICE MANUALC 541COMPACTDISC PLAYERC 541COMPACTDISC PLAYERRadioFans.CN 收音机爱 好者资料库2CATUION HGKJDHSGKJHGSJKADVARSEL HGKJDHSGKJHGSKBVNCLKNBCVLKNLKNVLKNCVNCLVK JKADVARSEL HGKLFH;L;HJMNMDHFKLJHJLDKLJLKDJLKFHJHSGMMKJHGSJKVARING HGKJDHSGKJHGKLGDJHKLHKFG;LKNG;LKJGF;LKJGF;LKJFL;SJKVARO! HGKJDHSGKJHJBJKBKJBJKGSKBVNCLKNBCVLKNLKNVLKNCVNCLVK JKVORSICT! HGKLFH;L;HHBHHJDJHFKLJHJLDKLJLKDJLKFHJHSGKJHGSJKSAFETY INFORMATIONCAUTIONCAUTION- INVISIBLE LASER RADIATION WHEN OPEN ANDINTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.ADVARSEL- USYNLIG LASERSTRLING NR DEKSELPNES OGSIKKERHEDSLS BRYTES. UNNG EKSPONERING FOR STRLEN.ADVARSEL- USYNLIG LASERSTRLING VED BNING, NRSIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGUDSTTELSE FOR STRLING.VARING- OSYNLING LASERSTRLNING NR DENNADELRPPNAD OCH SPRRAR R URKOPPLADE. STRLEN R FARLIG.VARO!- AVATTAESSAJASUOJALUKITUS OHITETTAESSAOLETALTTIINANKTMTNT LASERSTEILYLLE. L KAISOSTEESEEN.VORSICT!- UNSICHTBARE LASERSTRAHLUNG TRITTAUS, WENNDECKELGEFFNETUND WENN SICHERHEITSVERRIEGELUNGBERBRCKTIST. NICHTDEM STRAHLAUSSETZEN.THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:-(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIREDOPERATION.The lightning flash with arrowhead, within an equilateral tri-angle is intended to alert the user of the presence ofuninsulated dangerous voltage within the productsenclosure; that may be of sufficient magnitude to consti-tute a risk of electric shock to persons.The exclamation point within an equilateral triangle is intend-ed to alert the user of the presence of important operatingand maintenance (servicing) instructions in the literatureaccompanying the appliance.CLASS 1LASER PRODUCTRadioFans.CN 收音机爱 好者资料库3SERVICE SAFETY PRECAUTIONS1.Replacing the fusesCAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLYWITH SAME TYPE OF FUSE.Reference NoPart NumberDescriptionM507 *AH 5120-0052-0FUSE T1.6A 250V 5X20MMM512, M513 *AH 5120-0020-0FU T1A 250V UL/CSA 5X20M514 *AH 5120-0026-0FU T315MA L 250V UL/CSAM507 *C 5120-0050-0FUSE T1.6A 250V 5X20MMM512, M513 *C 5120-0018-0FU T1A 250V SEMKO/VDEM514 *C 5120-0027-0FU T315MAL 250VNOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY.2.Safety check out(Only U.S.A. model)Before returning the product to the customer, make leakage current or resistance measurementsto determine that exposed parts are acceptably insulated from the supply circuit.Parts marked with the symbol are critical with regard to the risk of fire and electric shock.Replace only with parts recommended by the manufacturer.CONTENTSDESCRIPTIONPAGESPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8RF PATTERN TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-19TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-26MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27MECHANISM EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28EXPLODED VIEW OF LASER CD11CA-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29EXPLODED VIEW PARTS LIST OF LASER CD11CA-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .334SPECIFICATIONSDisc Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . .One Disc, 120 or 80 mmDecoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BURR-BROWN Delta Sigma 24bitDigital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Times oversampleAnalog Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 pole activeFrequency Response . . . . . . . . . . . . . . . . . . . . . .+/- 0.5 dB, 5Hz - 20kHzDe-Emphasis Error . . . . . . . . . . . . . . . . . . . . . . . .+/- 0.3 dBTHD (at 0 dB, 1kHz) . . . . . . . . . . . . . . . . . . . . . . .0.007%Intermodulation Distortion . . . . . . . . . . . . . . . . . . .90 dB10 kHz . . . . . . . . . . . . . . . .80 dBWow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . .Unmeasurable (Quartz Crystal Accuracy)Output Impedance . . . . . . . . . . . . . . . . . . . . . . . .200 Output Level at 0 dB . . . . . . . . . . . . . . . . . . . . . . .2.2 V rmsDigital Error Correction . . . . . . . . . . . . . . . . . . . . .CIRC with double error correctionin C1 and C2Digital Code Output . . . . . . . . . . . . . . . . . . . . . . .Sony / Philips Serial data formatCONTROLSPlay / Pause, Stop, Random, Skip (), Scan (), Open, Time, Repeat.PHYSICAL SPECIFICATIONSDimensions435 x 80 x 285 mm(Width x Height x Depth)Net weight4 kg (8.8 lbs)Shipping weight5.1 kg (11.22 lbs)5REAR PANEL / FRONT PANELREAR PANELFRONT PANEL1. LINE OUT2. DIGITAL OUT3. NAD LINK4. AC LINE CORD1. POWER ON / OFF2. DISC DRAWER3. DISPLAY4. OPEN5. PLAY / PAUSE6. TIME7. STOP8. REPEAT9. RANDOM10. SCAN Back () / Forward ()11. SKIP Back () / Forward ()6DISASSEMBLY INSTRUCTIONS1. Remove machine screws M 4.0 x 6.0 ( 1 to 4 ) from the side panels.Remove tapping screw 3.0 x 8.5 5 from the back panel.Refer to Figure No.1.Figure No.12. Pull both sides of the TOP COVER slightly outwards 6 and tilt approx. 35 and then removein the direction as indicated by the arrow 7 . Refer to Figure No.2.Figure No.2.543127667BLOCK DIAGRAMU401 LC866008SYSTEM CONTROL CPU& VFL DISPLAY DRIVERQ401- Q403MUTE CIRCUIT Q301-Q304 MUTEJ317RCAJACK U302PCM1732M318RCA JACKDIGITALOUTPUTU402NAD LINKMICRO-CONTROLLERU40374HC00 NAND GATENAD LINKINM501VFL DISPLAYNAD LINKOUTM319RCA JACK41434448116415913121098116357581161924471216133424443232414133536333439406567243656LRLRCD AUDIOO/P1011303156353439404443163 62U301LC78621DIGITALSIGNALPROCESSOR15271629210510611202521263181328U101 LA9240ANALOG SIGNALPROCESSOR/SERVOTOFFTGLCLV-CLV+EFM U701 LB1641MOTOR DRIVERU201 LA6541FOCUS & TRACKINGMOTORDRIVERLOADINGMOTORLOADING MOTORLIMIT SWITCH SPINDLEMOTORSLEDMOTORPU-INLIMIT SWITCHPICKUPDISCKEYBOARDM113REMOTESENSORCD MECHANISM UNITPOWERTRANSFORMERAC POWER I / PM110M109REPEATM104M111M112RANDOMM106M101M103M102TIMEM108Q101DACU306U3054U501,U507DIGITALPOWERU502-3,U506ANALOGUEPOWER+8V+5V+12V5V-12VD514-D517RECTIFIERDIODESD501-D504RECTIFIERDIODESD510-D511ZENER DIODES-22VD506-D508RECTIFIERDIODESU40374HC00NAND GATEM303EMC FILTERL301DIGITAL COILM500188WIRING DIAGRAMMAIN BOARDKEYBOARDLIVE BOARDDISPLAY BOARDM505BM120AM505ABROWNBLACKREDM502M102 (15 PINS)M105 (6 PINS)M101 (5 PINS)CD MECHANISMTRANSFORMERTO CHASSISNEUTRALLIVENADIN/OUT9RF PATTERN TESTINGTesting PointR132TestingPointJ334NAD - C 541 PCB TESTING POINTS DIAGRAMTESTING PROCEDURE(1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode.(2) Connect the scope to R132 (Pin 41 of U101) and DGND (J334).Scope setting:Coupling: AC.Vertical sensitivity: 0.2 V/ div.Horizontal time base: 0.5 S/div.(3) Observe the waveform is 2.0V p-p +/-5% and the eye pattern is at its best shape (see FIG. 1).FIG. 1 (a)FIG. 1 (b) Poor eye patternFIG. 1 (C) Good eye pattern3T 4T5T 11T10IMPORTANT NOTESINSTRUCTION FOR HANDLING OPTICAL SYSTEM BLOCK PICK-UPElectrostatic breakdown of the laser diode in the optical system block may occur due to a poten-tial difference caused by electrostatic charge accumulated on clothing, human body, etc. A groundmust be provided as follows to prevent any electrostatic charge during unpacking or repair work.1. Ground for Human BodyBe sure to wear a ground band (1M ohm) that is properly to remove any static electricity that maybe charged on the body.2. Ground for Work BenchBe sure to place a conductive sheet (1M ohm) or copper plate with proper grounding on the workbench or other surface on which the pick-up is to be placed.3. Because the static electricity charge on the clothing does not discharge through the bodygrounding band, do not let clothing to get in contact with the pick-up unit. PRECAUTIONS FOR CHECKING BEAM EMISSIONThe laser beam of this unit is focused on the reflecting surface of the objective lens in the opticalsystem block. Therefore, keep your eyes at least 12 inches (30 cm) away from the objective lenswhen the laser diode is ON.(Operation Check Method for Laser Diode and Focus Search Function.)When the POWER switch is turned ON after the chucking plate is removed, observe the objectivelens and confirm that the following operations are performed properly.(The optical system should be at the lead-in area position when it is checked at this time.)(1) The laser should be at the innermost position after the chucking plate is removed.(2) The diffused light of the laser beam can be seen when the POWER switch is turned ON.(3) Vertical (up and down) movement of the ojective lens (2 or 3 times) will take place.INCORRECTCORRECTNOTE: Laser diodes are so susceptible to damage fromstatic electricity that even if a static discharge does notruin the diode, it can shorten its life or cause it to workimproperly.1.Grounding band1M ohm1M ohm2.Conducttive Sheetor Copper Plate11PRECAUTIONS WHEN CHANGING LASER PICK-UPWhen removing the pick-up assembly, short circuit the PCB tracks on the optical block as show inthe drawing in order to protect the pick-up before removal.NOTE: Replacement pick-up assemblies are supplied with the PCB pattern already protected.DO NOT REMOVE THE SHORT CIRCUITS UNTIL YOU HAVE FINISHED FITTING THE PICK-UP.Caution:Laser diodes are extremely susceptible to damage from static electricity. Even if a static dis-charge does not ruin the diode, it can shorten its life or cause it to work improperly. When replac-ing the pick-up, use a conductive mat, a grounded soldering iron, and so on, to protect the laserdiode from static damage.Ground ConductiveWrist Band for BodyGround LineLess than10 ohmConductive Gum MatSolderingIron withGroundwireProtective soldering placefor laser diode12PCB LAYOUTLIVE BOARDKEY BOARDDISPLAY BOARD1413MAIN BOARD1516SCHEMATIC DIAGRAMD+5VRXDGNDHDCDD+5VRXDGNDDGNDHDCDHDCDHDCDHDCD0V0V0V2.4V1.6V0V0V0V4.9V0V4.8V*0V4.8V*1.2V4.9V*0V5V0V4.3V2.2V5V0V0V0V5V5V2.4V0V1.1V*2.7V1.2V*2.7V*7.4V7.8V2.5V2.5V2.5V3.4V3.4V0V0V0V3.5V3.5V2.5V2.5V4.8V4.9V*7.4V 7.8V*5V 0V2.4V2.5V*3.3V3.5V*2.9V3.5V0V0V0V3.4V3.4V2.5V2.5V5V*7.4V7.8V0V0V5V5V5V5V4.9V4.9V4.9V4.9V0V4.8V2.6V2.4V4.9V#0V#4.9V0V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2V3.7V0V0V0V0V0V0V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V2.4V5V0V3.3V1.6V0V4.7V4.8V0V0V0V0V *1.8V5V5V0V4.9V4.9V5V2.3V2.2V0V0V2.4V2.3V4.9V4.9V4.9V0V0V2.4V2.4V3V *1.6V0V *1.8V0V0V0V0V0V0V0V0V0V0V0V0V0V0V2.4V2.4V5V0V0V*1.4V4.6V0V1.7V5V1.5V*0.3V 0V2.3V2.5V2.5V0V*0.4V 0V0V0V0V0V0V0V4.9V4.9V2.3V0.2V*0V 4.9V0V0.7V0.5V0V0V7.8V7.8V0.7V0.5V0.06V #4.2V*1.2V 3V2.4V2.4V2.1V2.3V2.3V0V0V2.4V2.5V0V5V5V0V5V0V4.9V0V2.3V0V0V2.4V2.5V5V5V5VHDCDR428560RDGNDRESISTORS: M- METAL FILMF- FUSIBLECARBON FILM UNLESS OTHERWISE SPECIFIED.NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/8W.2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V 10%.3. COMPONENTS MARKED “” ARE SAFETY CRITICAL PARTS.4. VOLTAGE SPECIFIED ON THE ICS PIN WHICH DOES NOT HAS MARKING IS IN STOP MODE,MARKED WITH “*” IS PLAY MODE, “#” IS TRAY OPEN MODE AND “ IS TRAY CLOSE MODE.64VCC163LDS62LDD61BH160PH159LF258VR57REFI56VCC255FSS54DRF53CE52DAT51CL50CLK49DEF48 NC47 TBC46 FSC45 DGND44 SLI43 SLC42 RFS41 RFSM40 CV+39 CV38 SLOF37 HFL36 TES35 TOFF34 TGL33 JP+32JP31SL+30SL29SLD28SLEQ27SPD26SP25SPG24SPI23SP22AGND21FE20FE19FA18FA17FD1FIN22FIN13E4F5TB6TE7TE8TESI9SCI10TH11TA12TD13TD14JP15TO16FDREFBALI/VTET.SERVO & T.LOGICF.SERVO & F.LOGICSPINDLE SERVOSLCAPCRF DETVCARF Amp - comINTER FACEVCASLED SERVO17IC BLOCK DIAGRAMU101: LA9240EFMODEFIEFMINLRSYC2FROMXADOUTASDACKASDFINASDFIRASLRCKDACKODFOLODFOROLRCKOFSEQCLV+CLVV/PPW,SBCKSBSY,SFSYWRQ,SQOUTCQCKCOINRWCDEMOFST,FOCSFZDHFL,RESTES,JP+TOFF,JPTHLD,TGLEMPHLASER16M4.2MCSCONTEFLGFSXXINXOUTXVDD,XVSSCK2RVDD,RVSSMUTERRCHPRCHNLVDD,LVSSLCHNLCHPTGLEFMOVVDDVVSSPDOISETPCKTAITST11TST10TSET1TEST2TEST3TEST4TEST5VDDVSS2K x 8-bit RAMRAM addressgeneratorInterpolationand mutingAntishockinterfaceDigitalattenuator8x oversamplingdigital filtersLevel meterPeak meterCrystal oscillator systemTiming generationC1 AND C2 ERROR DETECTIONAND CORRECTIONFLAG PROCESSINGCLV DIGITALSERVOSUBCODESEPARATIONQ CRCMICROPROCESSORINTERFACESlice levelcontrolVCO clock OscillatorClock controlSYNCHRONIZATIONDETECTIONEFM DEMODULATIONSERVOCOMMANDDigitaloutput1bit DAC1096352126937801226317427424584445638394041363433464849525355437762587375703223,2920,2868,1916,17183064666763,6557,6059,611514132211124,2572717876,7951,5447,5035U301: LC78621ED18128ML/I2SLRCIN227MC/DEMDIN326MD/FSSBCKINSerialInputI/FModeControlI/FSCKBPZ ControlCrystal/OSCXTI XTOCLKOVCC1 AGND1 VDDDGNDPower SupplyPower-On ResetHDCD8XOversamplingDigital Filter withEnhancedMulti-levelDelta SignalModulatorDACLow-passFilterVOUTLVCC2LAGND2LVCC2RAGND2REXTLVOUTREXTRZEROLow-passFilterDACLRCINDINMUTERSTMODECS/IWOMD/FSSMC/DEMML/I2SBCKIN425MUTECLKO524MODEXTI623CS/1WOXTO7PCM1732U22RSTDGND82120ZEROVDD9GAINHDCD1019VCC2LVCC2R1118AGND2LAGND2R1217EXTLEXTR1316VOUTLVOUTR1415VCC1AGND1HDCDHiddenCodeRecoveryHDCDAmplitudeDecodingU302: PCM1732INPUTPort 3CounterTimers (2)InterruptControlTwo AnalogComparatorsPort 2I/O(Bit Programmabel)1P24P25P26P27P28XTAL 2XTAL 1P31P32P23P22P21P20GNDP02P01P00P3318910I/OVccALUOTPProgramCounterMachineTiming & Inst.ControlFLAGFlegisterPointerGeneral-PurposeRegister Fil