Kenwood-DM3090-md-sm 维修电路原理图.pdf

In compliance with Federal Regulations, following arereproductions of labels on, or inside the product relating tolaser product safety,KENWOOD-Corp. certifies this equipment conforms toDHHS Regulation No.21 CFR 1040.10, Chapter 1,Subchapter J.DANGER : Laser radiation when open and interlockdefeated.AVOID DIRECT EXPOSURE TO BEAM.*Refer to parts list on page 49.STEREO MINIDISC RECORDERDM-3090SERVICE MANUAL 1997-11/B51-5396-00 (K/K) 1812MULTI CONTROLTIME DISPLAYDISPLAY/CHARAC.TRACK/EDITON/STAND BYSTEREO MINIDISC RECORDERTIMER/DELETEENTERRECREC LEVEL010PHONES LEVELMINMAXPHONESRLRLPLAYOUTRECINDIGITALLINE2REC IN1REC INPLAY OUTOPT.RESETKENWOOD badge(B43-0302-04)Front glass(B10-2457-08)Front panel(A60-1370-08)Knob (JOG)(K29-6946-08)Knob (REC/HP)(K29-6947-08)AC power cord bushing(J42-0338-08)AC power cord *(E30-)Optical digital output(W02-2643-08)Switch (RESET)(S68-0091-08)Analogue output terminal(E63-1031-08)Optical digital input(W02-2643-08)Knob (POWER)(K27-2261-08)Knob(K27-2262-08)Head phone jack(E11-0345-08)Panel(A29-0898-08)Digital input terminal(E63-1032-08)DM-3090(K) COVER 97.11.29 0:18 AM yW 2RadioFans.CN 收音机爱 好者资料库If a problem occursIf this product is subjected to strong external interference(mechanical shock, excessive static electricity, abnormalsupply voltage due to lightning, etc.) or if it is operatedincorrectly, it may malfunction or the display may notfunction correctly. If such a problem occurs, do thefollowing:Unplug the AC power lead from the AC socket.Wait about 20 - 30 seconds and then plug the AC powerlead back into the AC socket.Press the reset key on the back of the unit. When the reset key is pressed, all of the settings in memorywill be erased.RLRLPLAYOUTRECINDIGITALLINE2REC IN1REC INPLAY OUTOPT.RESETRESETBeware of condensationWhen water vapor comes into contact with the surface ofcold material, water drops are produced. If condensationoccurs, correct operation may not be possible, or the unitmay not function correctly.This is not a malfunction, however, and the unit should bedried.(To do this, turn the POWER switch ON and leave the unitas it is for several hours.)Be especially careful in the following conditions: When the unit is brought from a cold place to a warm placeand there is a large temperature difference. When a heater starts operating. When the unit is brought from an air-conditioned place toa place of high temperature with high humidity. When there is a large difference between the internaltemperature of the unit and the ambient temperature, or inconditions where condensation occurs easily.619+102345780Remote control unit (1)(A70-1208-08) Battery cover (A09-0337-08)Audio cord (2)(E30-0505-05)Optical fiber cable (1)(B19-1529-05)Batteries (2)DM-30902CONTENTS/ACCESSORIES/CAUTIONSCONTENTS/ACCESSORIES/CAUTIONS.2CONTROLS .3DISASSEMBLY FOR REPAIR.5BLOCK DIAGRAM .7CIRCUIT DESCRIPTION.9TROUBLE SHOOTING.16ADJUSTMENT.24PC BOARD . 32SCHEMATIC DIAGRAM . 37EXPLODED VIEW .47PARTS LIST.49SPECIFICATIONS .Back coverCONTENTSAccessoriesCautionsDM-3090(K) COVER 97.11.29 0:18 AM yW 3RadioFans.CN 收音机爱 好者资料库Names and functions of partsMULTI CONTROLTIME DISPLAYDISPLAY/CHARAC.TRACK/EDITON/STAND BYSTEREO MINIDISC RECORDERTIMER/DELETEENTERRECREC LEVEL010PHONES LEVELMINMAXPHONES1?2?3?4?5?6?7?8?9?0?!?#?$?%?1 Eject key: 2 Power switch (ON/STAND BY key)3 Mini Disc Insertion slot4 TIME DISPLAY key5 DISPLAY/CHARAC key6 TRACK/EDIT key7 TIMER/DELETE key8 Jog dial (Next/Previous)9 ENTER key0 Headphone jack (HONES)! Headphone output level control Record level control# Record key: $ Play/Pause key: % Stop key: Cue/Review key: /TOCDISCTOTALREMAINRANDOMTIMER RECCLOCKTRACKDATE0dBOVER124MONO LP PRGM18152916310174111851219613207141?2?3?4?5?6?7?8?9?0?!?#?$?%?&?*?(?1 Pause indicator: 2 Record indicator: 3 Play indicator:4 Monaural Long-Play Mode indicator5 Programme indicator6 Repeat indicator: 7 Total Time/Remaining Time indicator8 Random indicator9 Timer Playback/Timer Recording indicator0 Clock indicator! Music Calendar More Tracks indicator# Recording Level indicator$ Recording level too high indicator% Level Meter/Character Information display Date indicator& Track indicator* Disc Name indicator) TOC Indicator: TOCFront panelDisplayDisplayDM-30903CONTROLSDM-3090(K) COVER 97.11.29 0:18 AM yW 6Remote control unitPOWERDISPLAYTIMEDISPLAY619+10RECMODEPLAYMODEAUTOMARKRECCANCELSYNCHRORECRECRECINPUTTRACK EDIT TIMERENTERPROGRAMCLEAREJECT2345780SELECTREMOTE CONTROL UNITRC-M03017?6?5?4?3?2?1?4 Basic operation keys/: Skip down/ Skip up (Cue/Review) keyREC: Record key: Stop key: Play/Pause keyPLAY MODE: Play mode key7 Display keysDISPLAY : Display keyTIME DISPLAY : Time displaykeyModel: RC-M0301Infrared ray systemPHONESPHONES LEVELMINMAXThe remote control unit incorporates the basic operation keys as well as a variety of applied operation keysso that it can be used in a wide range of purposes.Use care to store the remote control unit in a safe place so as not to lose it.1 POWER key2 EJECT key3 Numeric keys6 Recording operation keysREC INPUT: Input select keyREC MODE: Record mode keyAUTO MARK: Auto mark keyREC CANCEL: Record cancelkeyPlug the stereo headphones (with standard-plug) available in audio stores into the PHONES jack and adjust the listening volumewith the PHONES LEVEL control on the front panel.Listening through headphones5 Applied operation keysENTET: Entet keyTRACK EDIT: Edit keyTIMER: Timer keySYNCHRO REC:Synchro recording keyPROGRAM: Program keyDM-30904CONTROLSDM-3090(K) COVER 97.11.29 0:18 AM yW 7REMOVING AND REINSTALLING THE MAIN PARTSMD MECHANISM SECTIONPerform steps 1 to 3 of the disassembly method to remove theMD mechanism.How to remove the magnetic head(See Fig. 10-1)1. Remove the screws (A1) x 1 pc.10Caution:Take utmost care so that the magnetic head is not damagedwhen it is mounted.How to remove the cartridge holder(See Fig. 10-2)1. Open the roller arm lever in the arrow direction, and lowerthe clamper lever to the rear side.2. Apply +5V to the red line side of blue connector of loadingmotor, push the rack gear in the arrow direction to move thecam plate lever until tick is heard.3. Remove the screw (B1) x1 pc., and the spring (B2) x1 pc.,fitted to the holder arm, and shift the cartridge holder to theleft side to remove it.How to remove the mechanism switch PWB(See Fig. 10-3)1. Remove the screws (C1) x 2 pcs., and remove the mecha-nism switch PWB.Figure 10-1Figure 10-2Figure 10-3MD Mechanism(A1)x11.7x5mmMagnetic HeadSlider LeverCartridge HolderClampa LeverLack GearRoller Arm LeverLoading MotorCam Plate Lever(B1) x11.7x5mm(B2) x1(C1)x11.7x3mm(C1)x11.7x9.5mmMD MechanismSwitch PWBDM-30905DISASSEMBLY FOR REPAIRDM-3090(K) COVER 97.11.29 0:18 AM yW 10How to remove the sled motor/loading motor(See Fig. 11-1)1. Remove the screws (D1) x 1 pcs., and remove the sledmotor/loading motor.Caution:Be careful so that the gear is not damaged.(The damaged gear emits noise during searching.)Figure 11-1Figure 11-2Figure 11-3How to remove the spindle motor(See Fig. 11-2)1. Remove the screws (E1) x 3 pcs., and remove the spidlemotor.Caution:Be careful so that the turntable is not damaged.How to remove the optical pickup(See Fig. 11-3)1. Remove the screws (F1) x 3 pcs.Caution:Be careful so that the gear is not damaged.(The damaged gear emits noise during searching.)Sled MotorLoadingMotor(D1)x21.7x2mm(D1)x21.7x2mmSpindle MotorTurntable(E1)x31.7x2.5mmOptical Pickup(F1)x31.7x9.5mmDM-30906DISASSEMBLY FOR REPAIRDM-3090(K) COVER 97.11.29 0:18 AM yW 11 Figure 28BLOCK DIAGRAM (1/2)D6.5/4.75 5.25VMECHAN1SM6.5/4.755.25VD3.2VSYSCLKDVDDDVDDD3.2VDIGITAL3.2VD3.2VD4.3VD4.3VD3.2VD4.3VD3.2VBACKUPVOLTAGEREGULATOR POWERIC1402S29294AE2PROMIC1601M56758FP5-CHMOTOR DRIVERBACKUPMD MICRO COMPUTERIC1401IX0227AWMD SYSTEMMICROCOMPUTERDIGIN(EIAJ)PDOWNDIGOUT(EIAJ)GNDGND1243BCLKMUTEDFS0DADATALRCLKADDATADFS1LOAD INRESETMD-STDSCKSERCH122423222120191817161514456789131011123D.GNDD.GNDD.GNDD.GNDDSTBMDDATAKDATA4MDRAMENDECATRACIC1201LR37648OSCILLATORXL1201(33.8688MHz)SW1956SW1955SW1954SW1953SW1952Q1251Q1254MDRECORDING HEADM901SPINDLE MOTORM902SLED MOTORM903LOADING SWITCHRECSWITCHPLAYSWITCHLEAD INSWITCHABSIGNALEFSIGNALRF1 RF4SIGNALHEAD DRIVESIGNALIC1251IC1101IR3R55RFSIGNALPROCESSORLOADING MOTORHEAD UP/DOWNMMDIRECT SWITCHWRITE PROMLASER DIODEMONITOR DIODERF4RF3RF2RF1LIGHTRECEIVINGSECTIONERRORSIGNALLIGHTRECEIVINGSECTIONRFFABEFOCUSTRACKINGPICK UP UNITIC1202IX2474AFCNP1904CNP1902IC1906AND GATE TC7ST08FIC1907CLOCK GENERATOR TC92ASFIC1990INVERTOR 74AC04FSIC1916AND GATE74VHC08FDM-30907BLOCK DIAGRAMDM-3090(K) COVER 97.11.29 0:19 AM yW 14 Figure 29BLOCK DIAGRAM (2/2)LINE INJ101IC101NJM4560DOPE AMP+7V+7V-7V-7VREC VOLVR901SYSCLKAD DATALRCLKBLCKDA DATAMODECLKDATAQ601Q602IC501REGULATORS81233YKJ301DIGITAL -IN(COAXIAL JACK)SO302DIGITAL IN(OPTICAL JACK)RX302DIGITAL OUT(OPTICAL JACK)IC30174HCU04INVERTERIC302NAND GATE74HC10APDIGITAL INMD UNITDIGIN VCCDIGITAL OUTQ503A-7VPOWERCIRCUITMD+POWERCIRCUIT5V SYSTEMPOWERCIRCUITBACK UP 5VDIGITAL 5VMD 5VMD+S-ID,SYN,RESET,DSTB,DSCKK-DATA,MD DATAFL DISPLAY +BFL901DIGSEGJOGKEYRX-INIC901IX0196AWSYSTEMMICROCOMPUTERMDMUTESW901JOGSWITCHKEY INBLOCKUN970REMOTESENSORFL VP(-31V)A/D +5VBACK UP +5VFLPOWERCIRCUITFL VP(-32V)FL DISPLAY +BRECTIFYINGCIRCUITF5511A L 250VF5521A L 250VT551POWER TRANSFORMERAC 230V50HzHEADPHINESJ981H.P.VOLVR981IC651NJM4560DOPE AMPQ451Q452MUTEJ101LINE OUT345178351219161315242610234517213834517881326131017212142 60894590 92972363210339691100+7V-7VIC201UDA1340AD/DA CONVERTERIC601LINE AMP.NJM4580DQ502Q506Q504A+7VPOWERCIRCUIT3VDM-30908BLOCK DIAGRAMDM-3090(K) COVER 97.11.29 0:19 AM yW 15DM-30901RF1IIIIIIIIIIIIIIOOOOOOOOOIOOOOIIOOOOOORF signal input terminal 1 Input of RF signal output of pickup2RF2RF signal input terminal 2 Input of RF signal output of pickup3RF3RF signal input terminal 3 Input of RF signal output of pickup4RF4RF signal input terminal 4 Input of RF signal output of pickup5REFIReference voltage amp. input terminal6REFOReference voltage amp. output terminal7RFADDRF1 to 4 resistance addition output terminal8TCGITrack cross detection signal amp. input terminal for groove9AINServo signal amp. (focus servo system) inversion input terminal10BINServo signal amp. (focus servo system) inversion input terminal11EINServo signal amp. (tracking servo system) inversion input terminal12FINServo signal amp. (tracking servo system) inversion input terminal13BIASBias input terminal14AVCCAnalog section power terminal15*VSTBYLogic signal output terminal (STBY signal inversion signal is output.)16*XDISCLogic signal output terminal (DISC signal inversion signal is output.)17*XSGAINLogic signal output terminal (SGAIN signal inversion signal is output.)18AGNDAnalog section GND terminal19DGNDDigital section GND terminal20DTEMPChip temperature detection terminal21LATCHLatch signal input terminal22CLOCKClock signal input terminal23DATASerial data input terminal24DVCCDigital section power terminal25FOUTServo signal amp. (tracking servo system) output terminal26EOUTServo signal amp. (tracking servo system) output terminal27BOUTServo signal amp. (focus servo system) output terminal28AOUTServo signal amp. (focus servo system) output terminal29TCGOTrack cross detection signal amp. output terminal for groove30WBOComparator output terminal for ADIP signal binary-coding3122KIComparator input terminal for ADIP signal binary-coding3222KOADIP signal HPF amp. output terminal33ADLPFOADIP signal LPF amp. output terminal34*NCNC35ADIPOADIP signal primp. output terminal36ADIPIADIP signal AGC amp. output terminal37ADAGCADIP signal AGC smoothing capacitor connection terminal38ADAGIADIP signal AGC amp. input terminal39RF2-1RF1 and RF2 difference signal40EFMORF signal primp. output terminal41*WFMIRF signal AGC amp. output terminal42AVCCAnalog section power terminal43AGNDAnalog section GND terminal44EFMAGCEFM signal AGC smoothing capacitor connection terminal45EFMAGIEFM signal AGC amp. output terminal46*ATTRPins 47 and 48 output signal attenuation terminal47GOUTOutput of signal of RF1+RF2-RF3-RF4 for groove48POUTRf1 to 4 resistance addition output for pitIC1101 VHiiR3R55/-1:RF Signal Control (IR3R55)Pin No.Terminal NameI/OFunctionIn this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.CIRCUIT DESCRIPTION9DM-3090(K) COVER 97.11.29 0:20 AM yW 38DM-30901*EFMMONOutputEFM monitor output2AVCCAnalog power3EFMIInputEFM signal input from RF amp.4AGNDAnalog GND5AINInputFocus error signal A6EINInputTracking error signal E7TCGInputTrack cross signal8BINInputFocus error signal B9FINInputTracking error signal F10*VBATInputPower voltage detection signal for constant voltage servo11WBIInputADIP wobble signal12VDD1Digital power13DGNDDigital GND14,15TEST0,TEST1InputInput for test. Connection to GND in case of normal use16TEST2InputInput for test. Endecode/servo mode and ATRAC mode selection17X176KOOutputClock output. f=176.4 kHz (4fs)18FODRFOutputFocus servo forward output. PWM19FODRROutputFocus servo reverse output. PWM20TRDRFOutputTracking servo forward output. PWM21LATCHOutputTracking servo reverse output. PWM22CLOCKOutputSlide servo forward output. PWM23DATAOutputSlide servo reverse output. PWM24DVCCOutputSpindle servo forward output or spindle servo output. PWM25FOUTOutputSpindle servo reverse output or spindle rotation (forward/reverse)selection26EOUTOutputAddress output to external D-RAM. ADR327BOUTOutputAddress output to external D-RAM. ADR228AOUTOutputAddress output to external D-RAM. ADR129TCGOOutputAddress output to external D-RAM. ADR0 (LSB)30*WBOOutputAddress output to external D-RAM. ADR10 (MSB)3122KIPower supply for DRAM interface3222KOOutputAddress output to external D-RAM. ADR433ADLPFOOutputAddress output to external D-RAM. ADR534NCOutputAddress output to external D-RAM. ADR635ADIPOOutputAddress output to external D-RAM. ADR736ADIPIOutputAddress output to external D-RAM. ADR837ADAGCOutputData output enable signal output to external D-RAM38ADAGIDigital GND39RF2-1OutputColumn address strobe signal output to external D-RAM40EFMOIn/OutputData input/output from and to external D-RAM. D241WFMIIn/OutputData input/output from and to external D-RAM. D3 (MSB)42AVCCOutputData input/output from and to external D-RAM. ADR943AGNDOutputLow address strobe signal output to external D-RAM44EFMAGCOutputData write enable signal output to external D-RAM45EFMAGIIn/OutputData input/output from and to external D-RAM. D146ATTRIn/OutputData input/output from and to external D-RAM. D0 (LSB)47*GOUTOutputTrack cross signal48*POUTOutputADIP CRC error flag monitor output49*PLCKOutputEFM PLL clock output in playback mode50EFM0OutputEFM signal output in record mode. C1F (C1 error flag) monitor output in playback mode51*X700KOOutputClock output. f = 705.6 kHz. Clock output is not performed when RSTX = 0.52*EXPORT0OutputMicrocomputer extension output port 053*EXPORT1OutputMicrocomputer extension output port 1IC1201 VHiLR37648/-1:ENDEC/ATRAC (LR37648) Pin No.Terminal NameFunctionIn this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected