Kenwood-LSM31-cs-sm 维修电路原理图.pdf

70%678679620605680681677686674684607612683682685676675603614JK602(HM-381MD)MICRO HiFi COMPONENT SYSTEMRXD-M31MD/LS-M31(M)SERVICE MANUAL 1999-12/B51-5555-00 (K/K) 1853KENWOOD-Crop. certifies this equipment conforms to DHHSRegulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.DANGER : Laser radiation when open and interlockdefeated.AVOID DIRECT EXPOSURE TO BEAM* Refer to parts list on page 42.In compliance with Federal Regulations, following are repro-ductions of labels on, or inside the product relating to laserproduct safety.Front cabinet(A60-1745-08)Top panel(A21-3801-08)Knob (MD EJECT)(K29-7702-08)Knob (VOLUME)(K29-7690-08)Control panel *(A21-)Knob (ON/STANDBY)(K29-7700-08)Cass door cover(A02-2945-08)Headphone jack(E11-0398-08)MD door(A52-0376-08)Knob (TAPE/STOP)(K29-7699-08)Knob (MD/CD PLAY)(K29-7698-08)Knob (PANEL BUTTON)(K29-7701-08)Knob (MENU)(K29-7692-08)Knob (TAPE REC)(K29-7691-08)Knob(SET DEMO)(K29-7694-08)Knob (REPEAT)(K29-7693-08)Display lens(B12-0386-08)Cass door lens(B10-3524-08)Tuning panel(A21-3779-08)Knob (MD REC)(K29-7696-08)Knob (SOUND)(K29-7697-08)Knob (FF/TUNER/AUX)(K29-7695-08)RadioFans.CN 收音机爱 好者资料库SYSTEMMAIN UNITSPEAKERHM-381MD RXD-M31MDLS-M31(M)FM indoor antenna (1)Loop antenna (1)Batteries (R6/AA) (2)* AC (T90-0846-08)(E03-0115-05)(T90-0801-05)plug adaptor (1)* Use to adapt the plug on the power cord to the shape of the wall outlet. (Accessory only for regions where use is necessary.)Remote control unit (1)(A70-1241-05) : RC-F503 (K,P,M)(A70-1287-05) : RC-M0505E (E,T)Battery cover (A09-1114-08)REMOTE CONTROL UNITRC-F0503ESLEEPTONESOUND123TIMER456REPEAT789RANDOM+100PGMCLEARDOT DISP.TIME DISP.TAPEP.CALLTAPETUNERBANDCDPTYTA/NEWSAUXSETENTERMUTE42 37%fi61POWERVOLUMEO.T.E.Operation to resetThe microcomputer may fall into malfunction (impossibil-ity to operate, erroneous display, etc.) when the powercord is unplugged while unit is ON or due to an externalfactor. In this case, execute the following procedure toreset the microcomputer and return it to normal condi-tion.Unplug the power cord from the power outlet then, whileholding the “set/demo” key depressed, plug the powercord again. Please note that resetting the microcomputer clears thecontents stored in and it returns to condition when it leftthe factory.22set/demoRXD-M31MD2CONTENTS / ACCESSORIES / CAUTIONSCONTENTS / ACCESSORIES / CAUTIONS.2EXTERNAL VIEW.3BLOCK DIAGRAM .4CIRCUIT DESCRIPTION.5ADJUSTMENT.11WAVE FORM.12PC BOARD .14SCHEMATIC DIAGRAM .21EXPLODED VIEW .39PARTS LIST.42SPECIFICATIONS .53AccessoriesCautionsSystem configurationContentsRefer number for LS-M31(M), refer to parts list on page 52.Note related to transportation and movementBefore transporting or moving this unit, carry out the follow-ing operations.1 Remove the CD or MD from the unit.2 Press the 6 key of the MD.3 Press the 6 key of the CD.4 Wait for some time and verify that the display becomesas shown in the figure.5 Wait a few seconds and turn the unit OFF.RadioFans.CN 收音机爱 好者资料库RXD-M31MD3EXTERNAL VIEWFM300WFM75WAMGNDDIGITALOUTOPTICALANTENNAAUX INPUTAC 110120VAC 220240VSPEAKERS(616)+SUPERWOOFERPRE OUTMANUALAUTOPANELOPEN/CLOSERRLLMetal plate(RIGHT SIDE)(A51-1337-08)Metal plate(LEFT SIDE)(A50-1332-08)Speaker terminal(E70-0113-08)Phono jack(E63-1092-08)Slide switch(S62-0090-08)Power cord bushing *(J42-)AC power cord *(E30-)Slide switch *(S62-0091-08)Lock terminal board *(E70-)HS cover(BLACK)(F07-1685-18)RCA jack(E63-1091-08)Oscillating module*(OPTICAL)(W02-1114-05)* Refer to parts list on page 42.RXD-M31MD4BLOCK DIAGRAMDISPLAYMD CONTROLBOARDMAIN BOARDONLYE,T TYPEPOWER BOARDRXD-M31MDBOARDBOARDKEYBOARDKEYCASSETTE BOARDTRANSFORMER BOARDAUX INATT-3dBFMAMANTTUNERERASER/PBIAS TRAPOSCBIASQ713IC702IC703FE-BIASVR201(RF-AMP)CXA1571MIC202CXD2587Q(DSP/DAC/CD-TEXT)IC201(4ch BTL-DRIVER)BA5979SIC203MECHA.CDDIGITAL OUTRDS(MAIN u-COM)IC401IC103REMOTEFLFLDRIVER(A/D)KEYENCODERROTARYC0NTROLLEDMIDTREBLEBASSEX.BASSLOUDJK602HEADPHONESAMPPOWERD+12VF.OFFu-COMCD+BFLFL FILAMENTIC801J10011007IC1001IC701IC301Q601,IC601Q612-32VAVR+8.0VQ607AC INDIGITAL OUTJK302DECKJK601SPEAKERSJK301JK101Q712MECHA.DECKQ1001-603AC5.6V+5.6VQ611-18.5V+18.5VPOWERAMPAVR+12VQ604FETESIRFFFDRFRDRTFDRTRDRSFDRSRDRMDPMD R. DMD T. DRch-OUTLch-OUTPB AMPREC AMPDOUT(FCS.TRK.SLD.SFD-DRIVE)+3dBMUTEDECKTUNERAUXCDMD+12VuPD78058GC-B20MD MECHA.IC501IC502CN502DIGITAL IN(LEVEL SHIFT)TC74HCT7007AFMD MECHA.MDM-98ACONTROL u-COMDSCKRESETPDOWNMD-STSERCHKDATAU.T.DU.K.DX1X1X2DSTBMDDATALOAD SW5.0V3.3V(5MHz)RXD-M31MD5CIRCUIT DESCRIPTION1. Initialization1-1 Setting of initial conditionsWhile pressing the SET key, plug the AC power cordinto an AC power outlet.1-2 Initializing operation A microcomputer is initialized for start when the ACpower is turned on while pressing the SET key. Atthat time, CD mechanism, MD mechanism and CAS-SETTE mechanism are also initialized. During the initial operation, the display shows “INITIAL-IZEdiately.” and normal indication, after that it goes off imme-1-3 Initial items and back up data1-4 Mechanism initialization1-4-1 CD mechanism If a mechanism error occurs, “C” is indicated on thedisplay.1-4-2 MD mechanism The MD ON code is input within 4 seconds after turnedthe power port on, the MD initial code (D122H) is out-put. If the MD on code is not input, the error indication isdisplayed as M on the display.1-4-3 CASSETTE mechanism If a mechanism error occurs, X is indicated on the dis-play.chDestinationK2E2E1/H1FM97.50MHz FM97.50MHz FM97.50MHz2FM108.00MHz FM108.00MHz FM 108.00MHz3AM630kHz AM630kHz AM630kHz4AM1000kHz AM999kHz AM999kHz5AM1440kHz AM1440kHz AM1440kHz6AM1610kHz AM1602kHz AM1602kHz7FM87.50MHz FM87.50MHz FM87.50MHz8FM87.50MHz FM87.50MHz FM87.50MHz9FM87.50MHz FM87.50MHz FM87.50MHz10FM89.10MHz FM89.10MHz FM89.10MHz11FM87.50MHz FM87.50MHz FM87.50MHz12FM90.00MHz FM90.00MHz FM90.00MHz13FM106.00MHz FM106.00MHz FM 106.00MHz14AM530kHz AM531kHz AM531kHz15FM87.50MHz FM87.50MHz FM87.50MHz16FM98.00MHz FM98.00MHz FM98.00MHz17FM98.50MHz FM98.50MHz FM98.50MHz18FM87.50MHz FM87.50MHz FM87.50MHz19AM990kHz AM990kHz AM990kHz20FM97.40MHz FM97.40MHz FM97.40MHz21FM87.50MHz FM87.50MHz FM87.50MHz22FM87.50MHz FM87.50MHz FM87.50MHz23FM87.50MHz FM87.50MHz FM87.50MHz24FM87.50MHz FM87.50MHz FM87.50MHz25FM87.50MHz FM87.50MHz FM87.50MHz26FM87.50MHz FM87.50MHz FM87.50MHz27FM87.50MHz FM87.50MHz FM87.50MHz28FM87.50MHz FM87.50MHz FM87.50MHz29FM87.50MHz FM87.50MHz FM87.50MHz30FM87.50MHz FM87.50MHz FM87.50MHz31FM87.50MHz FM87.50MHz FM87.50MHz32FM87.50MHz FM87.50MHz FM87.50MHz33FM87.50MHz FM87.50MHz FM87.50MHz34FM87.50MHz FM87.50MHz FM87.50MHz35FM87.50MHz FM87.50MHz FM87.50MHz36FM87.50MHz FM87.50MHz FM87.50MHz37FM87.50MHz FM87.50MHz FM87.50MHz38FM87.50MHz FM87.50MHz FML 74.00MHz39FM87.50MHz FM87.50MHz FML 65.00MHz40FM87.50MHz FM87.50MHz FML 69.00MHz2. TUNER preset frequencyITEMSPOWEROFFVOLUME15BALANCECENTERLOUDNESSOFFAMPEX. BASSONINPUT SELTUNERAUX INPUT0BASS0TREBLE0BANDFMLAST fLIMITTUNERLAST PchAUTO/MONOAUTOPchTEST fCLOCKAM 12 : 00PROG ONAM 12 : 00CLOCKPROG OFFAM 12 : 00TIMERPRO MODEPLAYSOURCETUNERPch1EXEOFFOTTOFFSLEEPOFFPLAY MODETRACKREPEATOFFCDRANDOMOFFPLAY MODESTOPDIRECTIONFORWARDDECKRVS MODEpOPERATION MODESTOPback up data4. Main microprocessor M30622MA-198FP (MAIN BOARD IC401)4-1 Microprocessor periphery block diagram4-2 Key matrixVref = 5VDesti-U-COMDiscriminationReceiving frequencyChannelnationDesti-DSW4DSW3DSW2BandrangespaceIFRFnationK, PK1000FM87.5MHz108.0MHz100kHz+10.7MHz25kHzAM530kHz1700kHz10kHz+450kHz10kHzM, XK2001FM87.5MHz108.0MHz100kHz+10.7MHz25kHzAM530kHz1610kHz10kHz+450kHz10kHzJJ001FM76.0MHz108.0MHz100kHz-10.7MHz25kHzAM531kHz1629kHz9kHz+450kHz9kHzE, TE1110FM87.5MHz108.0MHz50kHz+10.7MHz25kHzRDSAM531kHz1602kHz9kHz+450kHz9kHz3. Destination list of TUNER(DSW4=50pin, DSW3=49pin, DSW2=48pin)0=(input low)1=(input high)IC202IC801Q10011007IC301IC702IC102IC103E TYPEONLYIC401CD mechanismMechanismcontrolcircuitMechanismcontrolcircuitAuto reversecassettemechanismHead ampCXD2587QCD-DSPTUNERPLL ICLC72131MAUDIOAMP SYSTEM IC(LC75396)MDMDM-98ALEDED1FLCM1829CKey matrixencoderremoconRDSdemodu-latorDOT driverLC75710NELED driverM30622MA-198FPu-COMDISPLAYBOARDVOLTAGEVRXD-M31MD6CIRCUIT DESCRIPTION4-3 Pin description of main microprocessorPin No.NameI/ODescription1CEOSYSTEM IC(LC75396)/PLL IC(LC72131)CE2PLL DOIPLL data input.3SDITuner SD detector input.H: no tunedL: tuned4STEREOITuner stereo detetor input.H: monoL: stereo5EMPHASISONo used.6RDS DATAIRDS data input.(E/T type only)7CEIAC off detector input.H: AC onL: AC off8BYTEIGround.9CNVSSIGround.10XCINITimer clock(32.768kHz).11XCOUTOTimer clock(32.768kHz).12RESETIU-com reset signal input.H: normalL: reset13XOUTOMain clock.14VSS-Ground.15XINIMain clock.16VCC-Power supply(+5.0V)17NMIIPower supply(+5.0V)18REMOCONIRemocon signal input.19RDX CLKIRDS clock input.(E/Ttype only)20SCORISub code synchro signal input.21CD DC OFFOPower supply control for CD DSP.H: offL: on22SCLKOCD sense data read out clock.23SENSEICD sense input.24CD CLKOCD DSP clock.25XLATOCD DSP latch output.26CD DATA OCD DSP data output.27CD RSTOCD DSP reset signal output.H: normalL: reset28SQCKOCD sub code clock.29SQSOIInput of CD sub code.30NCONo used.31FL DATAOData output of FL driver.32NCONo used.33FL CLKOClock output of FL driver.34CD ZD-No used.35UART1OTransmission data output to MD(UART).36UART2IData input from MD(UART).37LCD OCD laser output control.H: offL: on38NCONo used.39MD RSTOMD reset signal output.H: normalL: reset40CD MONOON/OFF control output of disc monitor.H: onL: off41NCONo used.42DM SHORTOSame as CD power signal.H: offL: on43DOOR SWIInput port of CD door switch.H: openL: close44,45NCONo used.46MODELIInput port of model discrimination.47DOLBYINo used.4850CODE24IDiscrimination of tuner destination.51FL RSTOReset signal output of FL driver.Pin No.NameI/ODescription52PWX33OControl port of MD CE.53ENC1IRotary encoder input(vol.A).54ENC2IRotary encoder input(vol.B).55LED5OControl port of LED(MD).H: onL: off56LED4OControl port of LED(CD).H: onL: off57LED3OControl port of LED(standby,RED).H: offL: on58LED2OControl port of LED(standby,GRN).H: offL: on59LED1OControl port of LED(FWD).H: onL: off60LED0OControl port of LED(RVS).H: onL: off61FL CEOOutput port of CE(FLdriver).62VCC-Power supply.63NCONo used.64VSS-Ground.65A/B-26566HHLHLLRECREC PAUSE,ARMPLAYODeck activity choise mode.66A/B-1ODeck activity choise mode.67CPMODeck motor control.H: onL: off68SOLODeck solenoid control.H: onL: off69REC F SWIDeck FWD REC switch input.H: offL: on70REC R SWIDeck RVS REV switch input.H: offL: on71PACK SWIDeck pack switch input.H: offL: on72Cro2 SW-No used.73PLAY SWIDeck play switch input.H: offL: on74B1/2-No used.75A120/70-No used.76BIASODeck bias control.H: onL: off77NOR-No used.78REC/PLAY-No used.79NR/ON-No used.80S.CLOClock output to system IC/PLL IC.81PRT MDIMD protection.H: protection on82FAN H/L-No used.83FAN ON/OFF-No used.84A MUTEOAudio muting control.H: offL: on85CD A MUTEOCD analog muting control.H: onL: off86TU.MTOTuner muting control.H: onL: off87PWR07OPower relay control.H: onL: off88PRT07IDetection port of protection.H: protection on8991KEY1KEY3IKey A/D input(13).92,93A/DP1,A/DP2-No used.94TA.MTOMuting control of DECK.H: onL: off95RDS SLEVELIRDS S-level input.(E/T type only)96AVSS-Ground.97PHOTOIDeck reel detector input.98VREF-Reference voltage.(no back up)99AVCC-Power supply.(back up)100S.DIOData output to system IC/PLL IC.RXD-M31MD7CIRCUIT DESCRIPTIONBack up powersupply (+5V)(MAIN BOARD: IC401)IC501MAIN u-COMM30622MA-198FPMD_MUTEMUTE AND OR(MAIN u-COM)back up swMD SUPPLY VOLTAGECHANGE-OVERTERMINALMD_RESETMD-STSEARCHLOAD_INDSCKK_DATADSTBMD_DATAuartrxdtxddigital inanalog L/R inanalog L/R outAD / DACONVERTERMDCONTROLu-COMDRIVEUNITMD u-COMRF AMPENDEC / ATRACMD mecha. unit (MDM-98A)22222131uPD78058GC-B20 DISPLAY CONTROL RF AMP CONTROL SIGNAL PROCESSING IC CONTROL (TUNER) VOLUME, MUTE CONTROL INPUT SELECTOR CONTROLback up voltage detection5. Composition (MD section)5-1 Microprocessor periphery block diagram6. Test mode6-1 Test mode of the receiver(1) Setting of the test mode.While pressing the Band key, plug the AC power cord into an AC power outlet.(2) Canceling of the test mode.Unplug an AC power cord.(3) Condition in test mode.POWER ONSELECTOR TUNER BANDFL, LED All the fluorescent display indicate and LEDs light. (The all illuminated state is cleared by pressing any mainunit key or remocon key.EX. BASS OFF5-2 Pin description of MD u-com : UPD78058GC-B20(MD control board, IC501)Pin No.NameI/ODescription1PDOWNOMDM-98A power down detector.2SEARCHOCD search output.3LOAD INILoad switch input.4AVSS-A/D power supply(connected to ground).5GND-No used.6NC-No used.7AVREF1-D/A reference voltage(+5.0V).8UART2ICommuniation from main u-com(UART RXD).9UART1OCommuniation to main u-com(UART TXD).10NC-No used.11MD DATAIMD IC input data(MDM-98A input data).12K DATAOMD IC output data(MDM-98A output data).13DSCKOMD IC clock output(MDM-98A).14DSTBIStrobe input for MD IC(MDM-98A).15COMM ANSINo used.16COMM DININo used.17COMM DOUTONo used.18COMM CLKI/ONo used.19COMM REQONo used.2031-No used.326.5/5.0VOChange- over of load voltage for MD unit. (disc load/eject : H other : L)33VSS-Ground.3443-No used.44INISWIInitial switch input.4552-No used.5355GND-No used.5658NC-No used.59SRESETONo used.60RESETIReset signal input.61GND-No used.6266-No used.67CEIDetection signal input of AC OFF.68VDD-U-com power supply.69X2-5MHz oscillator.70X1I5MHz oscillator.71IC-No used.72NC-No used.73GND-No used.74AVDD-A/D power supply.75AVREFOIA/D reference voltage.76BACKUPODetection signal(A/D) input for back up.(back up : more than 2.2V no back up : less than 2.2V77AMUTEOAnalog signal input. H : mute on L : mute off78BACKSWODetection switch input for back up.H : on(in case of CE=H) L :off(in case of CE =L)79MD RESETOReset signal input of MD u-com. H : normal L : MD u-com reset80MD STOST-ID output(MD ON).RXD-M31MD8CIRCUIT DESCRIPTION(4) Basic operation in test mode.The muting during mode selection is not controlled in the test mode.The test mode is cancelled when the AC power is turned OFF.(5) The operation of the keys in the test mode.6-2 Test mode of DECK section(1) SettingWhile pressing the TAPE key(DECK), plug the AC power cord into an AC power outlet.(2) ResettingDisconnect the AC power cord from an AC power outlet or press the ON/STANDBY key.(3) Operation in TEST mode(a) Initial conditionItemConditionPowerONSelectorTAPEMain VOL.0dB (VOL. 80)Input level(AUX)-6dB(INPUT 0)EX. bassOFFFL, LED, LCDAll the FLs, LEDs, and LCDs are turned on(b) 4-sec REC If the REC key is pushed, the system record for 4sec. Then, it rewinds to the REC starting position and plays back auto-matically. If the REC key is pushed during the 4-sec REC operation, the system records further for 4-sec, then returns to the start-ing position of the first 4-sec REC operation and plays back.SERECTORTUNERAUXOPERATION KEYMENUNORMAL ACTIVITYDISPLAYDISPLAYDISPLAYVOLUME INPUTBALANCE(VOLUME15)(INPUT 0 )(CENTER)4P.CALL : DOWNVOLUME 1INPUT-6(dB)7P.CALL : 10 STEP CHANGEOVER VOLUME 40 INPUT 0 (dB)102030 40 01P.CALL : UPVOLUME 80INPUT+3(d