Kenwood-RXDM-31-MD-Service-Manual电路原理图.pdf

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1、70%678679620605680681677686674684 607612 683 682 685 676 675603614JK602(HM-381MD)MICRO HiFi COMPONENT SYSTEMRXD-M31MD/LS-M31(M)SERVICE MANUAL1999-12/B51-5555-00 (K/K) 1853KENWOOD-Crop. certifies this equipment conforms to DHHSRegulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.DANGER : Laser ra

2、diation 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 EJE

3、CT)(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

4、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)SYSTEMMAIN UNITSPEAKERHM-381MDRXD-M31MDLS-M31(M)FM indoor antenna (1)L

5、oop 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-M0505

6、E (E,T)Battery cover (A09-1114-08)REMOTE CONTROL UNITRC-F0503ESLEEP TONE SOUND1 2 3 TIMER4 5 6 REPEAT7 8 9 RANDOM+10 0 PGM CLEARDOT DISP.TIME DISP.TAPEP.CALLTAPE TUNERBANDCDPTYTA/NEWS AUXSET ENTER MUTE42 3 7%61POWERVOLUMEO.T.E.Operation to resetThe microcomputer may fall into malfunction (impossibil

7、-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/d

8、emo”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 DESC

9、RIPTION.5ADJUSTMENT.11WAVE FORM.12PC BOARD.14SCHEMATIC DIAGRAM.21EXPLODED VIEW.39PARTS LIST.42SPECIFICATIONS.53AccessoriesCautions System configuration ContentsRefer number for LS-M31(M), refer to parts list on page 52.Note related to transportation and movementBefore transporting or moving this uni

10、t, carry out the follow-ing operations.1Remove the CD or MD from the unit.2Press the 6key of the MD.3Press the 6key of the CD.4Wait for some time and verify that the display becomesas shown in the figure.5Wait a few seconds and turn the unit OFF.RXD-M31MD3EXTERNAL VIEWFM300WFM75WAMGNDDIGITALOUTOPTIC

11、ALANTENNAAUX 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

12、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-M31MDBOARD BOARDKEYBOARDKEYCASSETTE BOARDTRAN

13、SFORMER BOARDAUX INATT-3dBFMAMANT TUNERERASER/PBIAS TRAPOSCBIAS Q713IC702IC703FE-BIASVR201(RF-AMP)CXA1571MIC202CXD2587Q(DSP/DAC/CD-TEXT)IC201(4ch BTL-DRIVER)BA5979SIC203MECHA.CDDIGITAL OUTRDS(MAIN u-COM)IC401IC103REMOTEFLFLDRIVER(A/D)KEYENCODERROTARYC0NTROLLEDMIDTREBLEBASSEX.BASSLOUDJK602HEADPHONESA

14、MPPOWERD+12VF.OFFu-COMCD+BFLFL FILAMENTIC801J1001 1007IC1001IC701IC301Q601,IC601Q612-32VAVR+8.0VQ607AC INDIGITAL OUTJK302DECKJK601SPEAKERSJK301JK101Q712MECHA.DECKQ1001-603AC5.6V+5.6VQ611-18.5V+18.5VPOWERAMPAVR+12VQ604FETESIRFFFDRFRDRTFDRTRDRSFDRSRDRMDPMD R. DMD T. DRch-OUTLch-OUTPB AMPREC AMPDOUT(FC

15、S.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 cond

16、itionsWhile 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 t

17、he 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 wit

18、hin 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.chDestinationK2 E2 E1/H1 FM 97.50MHz FM 9

19、7.50MHz FM 97.50MHz2 FM 108.00MHz FM 108.00MHz FM 108.00MHz3 AM 630kHz AM 630kHz AM 630kHz4 AM 1000kHz AM 999kHz AM 999kHz5 AM 1440kHz AM 1440kHz AM 1440kHz6 AM 1610kHz AM 1602kHz AM 1602kHz7 FM 87.50MHz FM 87.50MHz FM 87.50MHz8 FM 87.50MHz FM 87.50MHz FM 87.50MHz9 FM 87.50MHz FM 87.50MHz FM 87.50MH

20、z10 FM 89.10MHz FM 89.10MHz FM 89.10MHz11 FM 87.50MHz FM 87.50MHz FM 87.50MHz12 FM 90.00MHz FM 90.00MHz FM 90.00MHz13 FM 106.00MHz FM 106.00MHz FM 106.00MHz14 AM 530kHz AM 531kHz AM 531kHz15 FM 87.50MHz FM 87.50MHz FM 87.50MHz16 FM 98.00MHz FM 98.00MHz FM 98.00MHz17 FM 98.50MHz FM 98.50MHz FM 98.50M

21、Hz18 FM 87.50MHz FM 87.50MHz FM 87.50MHz19 AM 990kHz AM 990kHz AM 990kHz20 FM 97.40MHz FM 97.40MHz FM 97.40MHz21 FM 87.50MHz FM 87.50MHz FM 87.50MHz22 FM 87.50MHz FM 87.50MHz FM 87.50MHz23 FM 87.50MHz FM 87.50MHz FM 87.50MHz24 FM 87.50MHz FM 87.50MHz FM 87.50MHz25 FM 87.50MHz FM 87.50MHz FM 87.50MHz

22、26 FM 87.50MHz FM 87.50MHz FM 87.50MHz27 FM 87.50MHz FM 87.50MHz FM 87.50MHz28 FM 87.50MHz FM 87.50MHz FM 87.50MHz29 FM 87.50MHz FM 87.50MHz FM 87.50MHz30 FM 87.50MHz FM 87.50MHz FM 87.50MHz31 FM 87.50MHz FM 87.50MHz FM 87.50MHz32 FM 87.50MHz FM 87.50MHz FM 87.50MHz33 FM 87.50MHz FM 87.50MHz FM 87.5

23、0MHz34 FM 87.50MHz FM 87.50MHz FM 87.50MHz35 FM 87.50MHz FM 87.50MHz FM 87.50MHz36 FM 87.50MHz FM 87.50MHz FM 87.50MHz37 FM 87.50MHz FM 87.50MHz FM 87.50MHz38 FM 87.50MHz FM 87.50MHz FML 74.00MHz39 FM 87.50MHz FM 87.50MHz FML 65.00MHz40 FM 87.50MHz FM 87.50MHz FML 69.00MHz2. TUNER preset frequencyIT

24、EMSPOWER OFFVOLUME 15BALANCE CENTERLOUDNESS OFFAMP EX. BASS ONINPUT SEL TUNERAUX INPUT 0BASS 0TREBLE 0BAND FMLAST f LIMITTUNER LAST PchAUTO/MONO AUTOPch TEST fCLOCK AM 12 : 00PROG ON AM 12 : 00CLOCK PROG OFF AM 12 : 00TIMER PRO MODE PLAYSOURCE TUNERPch 1EXE OFFOTT OFFSLEEP OFFPLAY MODE TRACKREPEAT O

25、FFCDRANDOM OFFPLAY MODE STOPDIRECTION FORWARDDECK RVS MODE pOPERATION MODE STOPback up data4. Main microprocessor M30622MA-198FP (MAIN BOARD IC401)4-1 Microprocessor periphery block diagram4-2 Key matrixVref = 5VDesti-U-COM DiscriminationReceiving frequency ChannelnationDesti-DSW4 DSW3 DSW2Band rang

26、e spaceIF RFnationK, P K1 0 0 0FM 87.5MHz108.0MHz 100kHz +10.7MHz 25kHzAM 530kHz1700kHz 10kHz +450kHz 10kHzM, X K2 0 0 1FM 87.5MHz108.0MHz 100kHz +10.7MHz 25kHzAM 530kHz1610kHz 10kHz +450kHz 10kHzJJ0 01FM 76.0MHz108.0MHz 100kHz -10.7MHz 25kHzAM 531kHz1629kHz 9kHz +450kHz 9kHzE, TE1110FM 87.5MHz108.0

27、MHz 50kHz +10.7MHz 25kHzRDS AM 531kHz1602kHz 9kHz +450kHz 9kHz3. Destination list of TUNER (DSW4=50pin, DSW3=49pin, DSW2=48pin)0=(input low) 1=(input high)IC202IC801Q10011007IC301IC702IC102IC103E TYPEONLYIC401CD mechanismMechanismcontrolcircuit MechanismcontrolcircuitAuto reversecassettemechanismHea

28、d ampCXD2587QCD-DSPTUNERPLL ICLC72131MAUDIOAMP SYSTEM IC(LC75396)MDMDM-98ALEDED1FLCM1829CKey matrixencoderremoconRDSdemodu-latorDOT driverLC75710NELED driverM30622MA-198FPu-COMDISPLAYBOARDVOLTAGEVRXD-M31MD6CIRCUIT DESCRIPTION4-3 Pin description of main microprocessorPin No. Name I/O Description1 CE

29、O SYSTEM IC(LC75396)/PLL IC(LC72131)CE2 PLL DO I PLL data input.3 SD I Tuner SD detector input. H: no tuned L: tuned4 STEREO I Tuner stereo detetor input. H: mono L: stereo5 EMPHASIS O No used.6 RDS DATA I RDS data input.(E/T type only)7 CE I AC off detector input. H: AC on L: AC off8 BYTE I Ground.

30、9 CNVSS I Ground.10 XCIN I Timer clock(32.768kHz).11 XCOUT O Timer clock(32.768kHz).12 RESET I U-com reset signal input. H: normal L: reset13 XOUT O Main clock.14 VSS - Ground.15 XIN I Main clock.16 VCC - Power supply(+5.0V)17 NMI I Power supply(+5.0V)18 REMOCON I Remocon signal input.19 RDX CLK I R

31、DS clock input.(E/Ttype only)20 SCOR I Sub code synchro signal input.21 CD DC OFF O Power supply control for CD DSP. H: off L: on22 SCLK O CD sense data read out clock.23 SENSE I CD sense input.24 CD CLK O CD DSP clock.25 XLAT O CD DSP latch output.26 CD DATA O CD DSP data output.27 CD RST O CD DSP

32、reset signal output. H: normal L: reset28 SQCK O CD sub code clock.29 SQSO I Input of CD sub code.30 NC O No used.31 FL DATA O Data output of FL driver.32 NC O No used.33 FL CLK O Clock output of FL driver.34 CD ZD - No used.35 UART1 O Transmission data output to MD(UART).36 UART2 I Data input from

33、MD(UART).37 LCD O CD laser output control. H: off L: on38 NC O No used.39 MD RST O MD reset signal output. H: normal L: reset40 CD MON O ON/OFF control output of disc monitor. H: on L: off41 NC O No used.42 DM SHORT O Same as CD power signal. H: off L: on43 DOOR SW I Input port of CD door switch. H:

34、 open L: close44,45 NC O No used.46 MODEL I Input port of model discrimination.47 DOLBY I No used.4850 CODE24 I Discrimination of tuner destination.51 FL RST O Reset signal output of FL driver.Pin No. Name I/O Description52 PWX33 O Control port of MD CE.53 ENC1 I Rotary encoder input(vol.A).54 ENC2

35、I Rotary encoder input(vol.B).55 LED5 O Control port of LED(MD). H: on L: off56 LED4 O Control port of LED(CD). H: on L: off57 LED3 O Control port of LED(standby,RED). H: off L: on58 LED2 O Control port of LED(standby,GRN). H: off L: on59 LED1 O Control port of LED(FWD). H: on L: off60 LED0 O Contro

36、l port of LED(RVS). H: on L: off61 FL CE O Output port of CE(FLdriver).62 VCC - Power supply.63 NC O No used.64 VSS - Ground.65 A/B-265 66HHLHLLRECREC PAUSE,ARMPLAYO Deck activity choise mode.66 A/B-1 O Deck activity choise mode.67 CPM O Deck motor control. H: on L: off68 SOL O Deck solenoid control

37、. H: on L: off69 REC F SW I Deck FWD REC switch input. H: off L: on70 REC R SW I Deck RVS REV switch input. H: off L: on71 PACK SW I Deck pack switch input. H: off L: on72 Cro2 SW - No used.73 PLAY SW I Deck play switch input. H: off L: on74 B1/2 - No used.75 A120/70 - No used.76 BIAS O Deck bias co

38、ntrol. H: on L: off77 NOR - No used.78 REC/PLAY - No used.79 NR/ON - No used.80 S.CL O Clock output to system IC/PLL IC.81 PRT MD I MD protection. H: protection on82 FAN H/L - No used.83 FAN ON/OFF - No used.84 A MUTE O Audio muting control. H: off L: on85 CD A MUTE O CD analog muting control. H: on

39、 L: off86 TU.MT O Tuner muting control. H: on L: off87 PWR07 O Power relay control. H: on L: off88 PRT07 I Detection port of protection. H: protection on8991 KEY1KEY3 I Key A/D input(13).92,93 A/DP1,A/DP2 - No used.94 TA.MT O Muting control of DECK. H: on L: off95 RDS SLEVEL I RDS S-level input.(E/T

40、 type only)96 AVSS - Ground.97 PHOTO I Deck reel detector input.98 VREF - Reference voltage.(no back up)99 AVCC - Power supply.(back up)100 S.DI O Data output to system IC/PLL IC.RXD-M31MD7CIRCUIT DESCRIPTIONBack up powersupply (+5V)(MAIN BOARD: IC401)IC501MAIN u-COMM30622MA-198FPMD_MUTEMUTE AND OR(

41、MAIN u-COM)back up swMD SUPPLY VOLTAGECHANGE-OVERTERMINALMD_RESETMD-STSEARCH LOAD_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 SIGN

42、AL PROCESSING ICCONTROL (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 A

43、C 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 o

44、f MD u-com : UPD78058GC-B20(MD control board, IC501)Pin No. Name I/O Description1 PDOWN O MDM-98A power down detector.2 SEARCH O CD search output.3 LOAD IN I Load switch input.4 AVSS - A/D power supply(connected to ground).5 GND - No used.6 NC - No used.7 AVREF1 - D/A reference voltage(+5.0V).8 UART

45、2 I Communiation from main u-com(UART RXD).9 UART1 O Communiation to main u-com(UART TXD).10 NC - No used.11 MD DATA I MD IC input data(MDM-98A input data).12 K DATA O MD IC output data(MDM-98A output data).13 DSCK O MD IC clock output(MDM-98A).14 DSTB I Strobe input for MD IC(MDM-98A).15 COMM ANS I

46、 No used.16 COMM DIN I No used.17 COMM DOUT O No used.18 COMM CLK I/O No used.19 COMM REQ O No used.2031 - - No used.32 6.5/5.0V O Change- over of load voltage for MD unit. (disc load/eject : H other : L)33 VSS - Ground.3443 - - No used.44 INISW I Initial switch input.4552 - - No used.5355 GND - No

47、used.5658 NC - No used.59 SRESET O No used.60 RESET I Reset signal input.61 GND - No used.6266 - - No used.67 CE I Detection signal input of AC OFF.68 VDD - U-com power supply.69 X2 - 5MHz oscillator.70 X1 I 5MHz oscillator.71 IC - No used.72 NC - No used.73 GND - No used.74 AVDD - A/D power supply.75 AVREFO I A/D reference voltage.76 BACKUP ODetection signal(A/D) input for back up.(back up : more than 2.2V no back up : less than 2.2V77 AMUTE O Analog signal input. H : mute on L : mute off78 B