JVC-XMP55-md-sm 维修电路原理图.pdf

SERVICE MANUALPORTABLE MINIDISC PLAYER No.20738Jan. 1999COPYRIGHT 1999 VICTOR COMPANY OF JAPAN, LTD.Printed in Japan9901 (V )VICTOR COMPANY OF JAPAN, LIMITEDAUDIO DIVISION,10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,JapanXM-P55XM-PJ1(No.20738)XM-P55XM-PJ1XM-P55XM-PJ1ContentsSafety PrecautionsInstructions (For XM-P55&PJ1) Description of Major ICs Removal of Main Parts Maintenance of MD Pickup Procedures of Changing the MD PickupSelf-diagnosis Function of MDBlock Diagrams Standard Schematic Diagrams (XM-P55)Standard Schematic Diagrams (XM-PJ1)Printed Circuit BoardsParts List (XM-P55)Parts List (XM-PJ1)1-21-3162-12-122-232-232-242-272-292-362-42,433-1154-115BEEEENJUBUSUTUXUYArea Suffix (XM-PJ1 )U.K. (BU)Continental Europe (BU)Russian Federation (BU)Northern Europe (BU)U.S.A. (BU)Hong kong (BU,GD)Singapore (BU)Taiwan (BU)Saudi Arabia (BU)Argentina (BU)Area Suffix BEEEENJUBUSUTUXUY (XM-P55 )U.K. (BU,SL)Continental Europe (BU,SL)Russian Federation (BU,SL)Northern Europe (BU,SL)U.S.A. (SL)Hong kong (BU,GN,SL)Singapore (BU,SL)Taiwan (SL)Saudi Arabia (SL)Argentina (SL)OPENXM-P55XM-P55XM-PJ1RadioFans.CN 收音机爱 好者资料库1-24-15XM-P55XM-PJ1XM-P55XM-PJ1CAUTIONCAUTIONBurrs 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.Safety PrecautionPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.Packing Parts ListAccessories Parts ListRadioFans.CN 收音机爱 好者资料库XM-P55XM-PJ12-13738PEAKRF39RFAGC40AGCI41COMPO42COMPP43ADDC44OPO45OPN46RFO47MORFI4812MORFO2423Vcc3TADJ22EQADJ21VREF20F0CNT19XSTBY18XLAT17SCLK16SWDT15TEMP R14TEMP I13GNDIJ3VC4A5B6C7D8E9F10PD11APC12APCREF3635BOTMABCD34FE33AUX32ADFG31ADAGC30ADIN29ADFM28SE27CSLED26TE25WBLADJPeak, Bottom DetectorAGC, EQUSERCompUSEROP AmpRF Amp3T DetectorABCD AmpI-V AmpAPCTEMP AmpMUXFE AmpADIP AmpTE/SE AmpCPUCommand I/FCXA2523AR(IC310):MD RF & Servo1.Block Diagram2.Pin Function1234567891011121314151617181920I-V converted RF signal I input.I-V converted RF signal J input.Vcc/2 voltage output.A current input for main beam servo signal.B current input for main beam servo signal.C current input for main beam servo signal.D current input for main beam servo signal.E current input for side beam servo signal.F current input for side beam servo signal.Reflection light quantity monitor signal input.Laser APC output.Reference voltage input for the laser power intensity setting.Connect to GND.Connects the temperature sensor.Connects the temperature sensor. outputs the reference voltage.Data input for microcomputer serial interface.Shift clock input for microcomputer serial interface.Latch signal input for microcomputer serial interface.Latched when low.Standby setting pin. Normal operation when high Standby when low.Internal current source setting pin.IJVCABCDEFPDAPCAPCREFGNDTEMPITEMP RSWDTSCLKXLATXSTBYF0CNTIIOIIIIIIIOI-IIIIIIIPin No.SymbolI/OFunctionDescription of Major ICsXM-P55XM-PJ12-221222324252627282930313233343536373839404142434445464748Reference voltage output.Equalizer center frequency setting pin.BPF3T center frequency setting pin.Power supply.BPF22 center frequency setting pin.Tracking error signal output.Connects the sled error signal LPF capacitor.Sled error signal output.ADIP FM signal output.ADIP signal comparator input.Connects the ADIPAGC capacitor.ADIP2 binary value signal output.13 output / temperature signal output. Switched with serial commands.Focus error signal output.Reflection light quantity signal output for the main beam servo detector.RF/ABCD bottom hold signal output.Peak hold signal output for the RF/ABCD signals.RF equalizer output.Connects the RFAGC capacitor.RFAGC input.User comparator output.User comparator non-inverted input.Connects the capacitor for ADIP amplifier feedback circuit.User operational amplifier output.User operational amplifier inverted input.RF amplifier output. Eye pattern checkpoint.Input of the groove RF signal with AC coupling.Groove RF signal output.VREFEQADJ3TADJVccWBLADJTECSLEDSEADFMADINADAGCADFGAUXFEABCDBOTMPEAKRFRFAGCAGCICOMPOCOMPPADDCOPOOPNRFOMORFIMORFOOI/OI/O-I/OO-OOI-OOOOOOO-IOII/OOIOIOPin No.SymbolI/OFunctionXM-P55XM-PJ12-3CXA8069M(IC450):Sensorless Motor Driver48 3713 2412 125 36UINVINWINCOMUOUTVOUTWOUTPGNDRFCFGNDFCFG2FGRESETCLOCKSLOPEOSCVSWFVFUFCOMFCPOUTCPC2CP2CPC1CP1VCORMAXRMINVCOINVCCMCLOCKS/SBRAKEVCONTVCREF+ -+ -+ -+ -Voltage DriverPower StageLevel ShifterChargePumpVCOSensorlessLogicPhaseComparator1/8TimingControllorPWMF/RControllorFull WaveRectifierSampleand Hold1.Pin Layout2.Block DiagramXM-P55XM-PJ12-4Pin FunctionsPinNo.Pin NameFunctionsNon connectionDetection of motor currentMotor driven power supplyNon connectionConnect first condenser of charge pump to this terminal. Connect first condenser of charge pump to this terminal. Connect second condenser of charge pump to this terminal. Connect second condenser of charge pump to this terminal. Connect last condenser of charge pump / VG external inputGround of circuits except for output sectionStart / StopBrakeSpeed controlReference voltage of speed control FG pulse outputFG pulse output when pin15 FG signal goes half roundCorrection of frequency characteristic of speed control loopSetting of VCO oscillation frequencySetting of VCO maximum oscillation frequencySetting of VCO minimum oscillation frequencyForms motor waveformForms motor waveformForms motor waveformForms motor waveformVCO oscillation frequency controlMonitors CLOCK signalGround of circuits except for output sectionSample board for output current detectionForms saw-tooth wave for PWM wave formationForms santooth waveform for soft switching wave formationClock inputPower supply except for output sectionNon connectionMotor driven power supplyDetection of motor currentNon connectionReset for operation checkDetection of counter electromotive voltageMotor source outputNon connectionDetection of counter electromotive voltageMotor source outputNon connectionNon connectionDetection of counter electromotive voltageMotor source outputDetection of motor common voltageGround for output guardXM-P55XM-PJ12-5CXD2655R (IC351):Digital Servo ProcessorBlock DiagramXM-P55XM-PJ12-6Pin Function DescriptionMonitor input and outputMonitor outputMonitor outputMonitor outputData input of microcomputer serial interfaceShift lock input of microcomputer serial interfaceDate output of microcomputer serial interfaceReset input L : resetDisc sub cord Q sync / ADIP sync outputTest pinInput of external audio data to internal DACDAC power supplyIntegrated DAC Lch outputCrystal oscillation circuit input (512Fs=22.5792MHz)Crystal oscillation circuit output (Inverted output of OSCI)Integrated DAC Rch outputDAC groundTest pinDetection of Lch zero data / flag outputOut put of digital audio interface signalOutput of audio date to external audio blockLRCK to external audio block (44.1kHz)Output pin (2.8224MHz)256Fs output (11.2896MHz)Digital power supplyExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputExternal DRAM address outputDigital groundExternal DRAM output enableExternal DRAM CAS outputExternal DRAM address outputExternal DRAM RAS outputExternal DRAM write enableExternal DRAM date busExternal DRAM date busExternal DRAM date busExternal DRAM date busExternal VCO (784Fs) clock inputPlayback EFM full-swing outputPlayback EFM comparator slice voltage inputAnalog power supplyPlayback EFM comparator bias current inputPlayback EFM RF signal inputAnalog groundFilter input for master PLL of playback digital PLLFilter output for master PLL of playback digital PLLPeak hold signal input for quantity of lightBottom hold signal input for quantity of lightSignal input for quantity of lightFocus error signal inputAuxiliary input 1Center voltage inputMonitor output of A/D converter input signalAnalog power supplyAnalog groundSled error signal inputTracking error signal inputAuxiliary input 2Connect to the low-impeddance power supplyError signal input for laser digital APCADIP binary FM signal (22.051kHz) inputOutput for setting of CXA 2523 current sourceLatch output for CXA 2523 controlShift lock output for CXA 2523 controlData output for CXA 2523 controlReference PWM output for laser APCPWM output for laser digital APCTracking servo drive PWM output ()Tracking servo drive PWM output ()Digital power supplyFocus servo drive PWM output ()Focus servo drive PWM output ()4Fs output (176.4kHz)Sled servo drive PWM output ()Sled servo drive PWM output ()Spindle servo drive PWM output ()Spindle servo drive PWM output ()FG input of spindle CAV servoTest pinTest pinTest pinDigital groundDetection of Rch zero date / flag outputPinNo.SymbolFunctions and OperationsLatch input of microcomputer serial interface/Latch at the Falling edgeOutput of internal status corresponding tomicrocomputer serial interface addressPhase comparison output for analog PLL ofEFM decoderPhase comparison output for master PLL ofplayback digital PLLInternal VCO control voltage input for master PLL ofplayback digital PLLInput of upper-limit voltage of the A/D converteroperating rangeInput of lower-limit voltage of the A/D converteroperating rangeInterrupt request output L: When the interruptstatus occurs.PinNo.SymbolFunctions and OperationsXM-P55XM-PJ12-7HD6433045SV14X (IC501):Beams MicrocomputerAddress busData bus (upper level)Data bus (lower level)Port 3Port 6Port 8Port 5Port 2Bus ControllerPort 1Port 9Clock generatorPort 4Interrupt controllerROMMask ROMPROMFlash memory16 bitsintegratedtimer unit(ITU)DMAcontroller(DMAC)RefreshcontrollerWatch dog timer(WDT)Serial communicationinterface (SCI)2chProgrammabletiming patterncontroller (TPC)A/D converterD/A converterRAMTerminal LayoutBlock DiagramPort BPort APort 7XM-P55XM-PJ12-8DescriptionPinNo.SymbolFunction and OperationPinNo.SymbolFunction and OperationConnect to MPC17A39 power save terminalConnect to CXA8069 start / stop terminalCXD2655R monitor output selectionCXD2655R monitor output selectionCXD2655R monitor output selectionCXD2655R monitor output selectionGroundPLAY key inputStarting signal output for power supply circuitRemote control power OFFNon connectionPower supplyMicrocomputer reset inputPower supplyGroundConnect to Crystal NAX0275-001XConnect to Crystal NAX0275-001XPower supplyEEPROM2 chip select terminal outputEEPROM communication serial clock outputEEPROM communication serial DATA outputEEPROM chip select terminal outputPower supplyPower supplyPower supplyPower supplyPower supplyKey input (analog)Non connectionNon connectionBattery voltage input (analog)Non connectionConnect to temperature-detective thermistorRemote control PLAY key inputDisc detective switch inputGroundConnect to XINT terminal of CXD2655RConnect to SQSY terminal of CXD2655RNon connectionNon connectionNon connectionGroundConnect to MINT0 terminal of CXD2655RNon connectionConnect to BEEP of audio circuitConnect to MINT3 terminal of CXD2655RConnect to SENS terminal of CXD2655REEPROM communication serial data inputNon connectionACTIVE CLEAR BASS circuit ON / OFF outputPower supplyNon connectionNon connectionConnect to XRST terminal of CXD2655RConnect to XLAT terminal of CXD2655RSupplies +12V when flash memory is writing.GroundRemote control UART outputConnect to SWDT terminal of CXD2655RRemote control URAT inputConnect to SRDT terminal of CXD2655RNon connectionConnect to SCLK terminal of CXD2655RRF source pre-charge outputLaser ON / OFF outputRF source OFF outputSled driven voltage ON/OFFGroundClear signal of power supply circuit flip-flopMUTE output for audio circuitStarting control outputDebug / test modeParallel mode monitorParallel mode monitorParallel mode monitorParallel mode monitorDebug / test modeDebug / test modeDebug / test modeSleep function enable inputPower supplyNon connectionNon connectionNon connectionNon connectionNon connectionNon connectionNon connectionNon connectionGroundNon connectionGroundNon connectionNon connectionLSI source down detective inputALL tracks repeat key inputCommunications line terminals to CXA2523AR,connect to XSTB terminalCommunications line terminals to CXA2523AR,connect to SWDT terminalCommunications line terminals to CXA2523AR,connect to SCLK terminalCommunications line terminals to CXA2523AR,connect to XLAT terminalXM-P55XM-PJ12-9MPC17A39DTB-X (IC400):4Channel Bridge DriverTerminal LayoutPin Function DescriptionBlock DiagramPinNo.PinNo.SymbolFunctions and OperationsSymbolFunctions and OperationsDC / DC Converter circuit groundExternal CLOCK input connectionStandby mode controlOutput enableDriver power supplyDriver outputPower groundDriver outputDriver power supplyDriver power supplyDriver outputPower groundDriver outputDriver power supplyCH 1 control signal inputCH 1 control signal inputCH 2 control signal inputCH 2 control signal inputCH 4 control signal inputCH 4 control signal inputCH 3 control signal inputCH 3 control signal inputDriver outputDriver outputPower groundPower groundDriver power supplyDriver power supplyDriver outputPower groundDriver outputDriver power supplyControl circuit groundControl circuit power supplyPre-driver circuit power supplyDC / DC Converter boosting inductance, diode groundXM-P55XM-PJ12-10MB3800PFV-W(IC931):Switching Regulator ControllerTerminal LayoutBlock DiagramPin Function DescriptionReferencevoltageSoft startS.C.POutput drivecontrol circuitSantoothwave generatorPin No.SymbolFunctions and operationsError amplifier inversion inputSoft start, capacity for SCP setting connectionPower supplyOutput current setting, controlTotem-pole outputGroundCapacity for oscillation frequency setting, resistant connectionError amplifier outputXM-P55XM-PJ12-11MN41X17400CTT10X(IC391):DRAMTerminal LayoutBlock DiagramPin FunctionsSymbolFunctionAddress inputRow address / stroveColumn address / stroveWrite enabling input.Output enabling input.Data inputPower supply (3.3V)Power supply (0V)Non connectionOEDQ0DQ3WERASCAS100VSSVDD010010RowAddressBufferColumnAddressBufferOn ChipVBBGeneratorCBR RefreshCounterRowDecoderWordDriverMemoryCellSense. AmpColumnDecoderI/OSelectorDataOutputBufferDataInputBufferWriteClockGeneratorClock GeneratorXM-P55XM-PJ12-12Removal of Main PartsRemoving the MD Door Assembly and the Bottom Cover (See Fig.1 to 4)1.2.3.4.Move the door lever and open the door.Remove the four A screws attaching the MD door assembly and remove the MD door assembly from the body.Reverse the body and remove the six B screws attaching the bottom cover.Release the joint a outside and remove the bottom cover from the body.CAUTION: When reassembling the bottom cover, fit the part b of the hold knob slot to the hold switch on the main board (See Fig.4, 5).Fig.1Fig.2Fig.4Fig.3MD door assemblyMD door assemblyBottom coverPart aPart bBottom coverADoor leverABBBBBBXM-