Kenwood-MD-2070-Service-Manual电路原理图.pdf

《Kenwood-MD-2070-Service-Manual电路原理图.pdf》由会员分享，可在线阅读，更多相关《Kenwood-MD-2070-Service-Manual电路原理图.pdf（29页珍藏版）》请在收音机爱好者资料库上搜索。

1、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.

2、AVOID DIRECT EXPOSURE TO BEAM.Illustration is DMF-9020.Refer to parts list on page 29.STEREO MINIDISC RECORDERDMF-9020/9020(S)MD-2070SERVICE MANUAL1998-11/B51-5495-00 (K/K) 2945EDIT/SPACEFADE/DELETEINPUTMONITORREC INPUTSTEREO MINIDISC RECORD ERTIMERPHONESKEYBOARDLEVELMINMAXOFFPLAYRECSEARCHTITLEDISC

3、LOADING MECHANISM24 bit Rec. DIGITAL 15 RD O SRAM read strobe6 WR O SRAM write strobe7 CS O SRAM CS L; SRAM enable8 ASTB O SRAM address strobe9 Vdd - Power supply (Microprocessor)10 POWER O Power terminal H; Power ON11 MUTE O Mute control output L; Mute ON13 SCHNG O E2PROM data IN/OUT change-over H;

4、 SDA output14 SBUSY I/O 16 serial busy15 SDATA I/O 16 serial data16 SCL O E2PROM clock17 SDA I/O E2PROM data18 LDON O Laser ON / OFF control port H; LD ON19 RMS O Pick RMS H; ON20 XLAT O System IC latch21 SENS I System IC sens22 Vpp - GND23 PROTECT I Detection port of protect switch L; Protect ON24

5、REFLECT I Detection port of reflect switch H; Low reflect25 DISCIN I Detection of disc input switch L; Disc out SW ON26 STTLMT I Detection port of limit switch L; Start limit SW ON27 PHOTSW I Detection of mechanism play position L; Photo sensor ON28 REC SW I Input port of detection from REC position

6、 switch L; REC SW ON29 LOADIN O Output port of loading motor control signal L; Loading OUT30 LOADOUT O Output port of loading motor control signal L; Loading IN31 MNT0 I FOK signal from CXD2652AR (IC2) L; Focus ON32 MNT2 I Input port of monitor 2 from CXD2652AR (IC2)33 XRST O Output port of reset si

7、gnal to CXD2652AR (IC2)34 TX O Output port of recording permitted signal35 RECP O Laser power control to CXD2652AR (IC2)36 MNT3 I Input port of monitor 3 from CXD2652AR (IC2)37 Vdd - Power supply (Microprocessor)-41 OPEN O No used42 GND I No used43 RESET I Microprocessor hard reset44 REM I Remocon s

8、ignal input terminal45 XINT I Input port of interrupted status from CXD2652AR (IC2)46 CE I Microprocessor chip enable H; Enable / L; disable47 SQSY I Input port of sub code Q from CXD2652AR (IC2)48 DQSY I U-bit of digital IN / SUB Q sync input of CD format from CXD2652AR (IC2)50 MNT1 I Input port of

9、 track jump detection from CXD2652AR (IC2)51 Vdd - Microprocessor power supply (+5V)52 AVref 0 - A/D reference voltage (Connect Vdd)5356 KR0KR3 I Key return (KR0KR3)57 TMSW I Timer switch input 0.0V OFF1.25V PLAY3.7V REC5.0V58 INISW1 I Detection selector59 BACK I Back up voltage detection (Less than

10、 2.2V : NG)61 GND - GND62 BACK ON O Back up charge control H; Charge ON63 ENCA I Rotary encoder A64 AVref 1 - D/A reference voltage (+5V)65 SRDT I Data for reading input from CXD2652AR (IC2)1-2 Pin description3 EXLAT O Extension port latch4 EXCL O Extension port clock12 INISW2 O Destination selector

11、 H:DMF-9020,MD-207038,39 X2.1 Clock OUT/IN (12.5MHz)40 Vss GND49 DDQSY I DIR.(LC8904Q)SUB-Q thrust60 ENCB I Encoder input B1. Mechanism microprocessor : uPD784215GF533 (X25: IC31)1-1 Microprocessor peripley block diagramE2PROMRF AMPEXLAT:03EXDT:71DINSEL1 DINSEL2 DRON ADRST DARST EMPHAFLDRSTDIGRSTEXC

12、K:04CENA:70CRXD:68CTXD:69SRCLAT:80SRCDT:83SRCCK:82DEMPH:77DSUB2:83DSUB1:78DRDT:73DDQSY:49DLAT:76ENCB:6031:MNT050:MNT1ATRACDRAM(X33) IC7IC31(X33) IC2(X33) IC1(X33) IC6(X25) IC34(X25) IC3336:MNT332:MNT2CXD2652AR66:SWDT20:XLAT67:SCLK65:SRDT33:XRST21:SENS47:SQSY48:DASY45:XINT35:RECP34:TX18:LDONu-COM19:R

13、MSCXA2523AR13:SCHNGDWDT:74DCLK:7517:SDA16:SCLLC75710NETC74HC4094SM5844AFENCODERFL DRIVER(X14) S3(X14) IC1EXPANDER ICAD/DASUB U-COMSRCLC8904QDIR(X25) IC32(X25) IC7,8(X25) IC30(X25) IC25(X25) IC23FLDCE:7223:PROTECT24:REFLECT25:DISCIN(MDM-04)MD MECHA.ENCA:7027:PHOTSW26:STTLMTPOWER:1028:RECSWMUTE:1129:L

14、OADININISW2:12INISW1:5830:LOADOUTTMSW:575:RDKR2:55KR3:567:CS6:WRSRAM8BIT MEMORYLATCHKR1:54KR0:5384:AD091:AD7 BUS 92:A898:A14RESET:43CE:46BACKCHK:85BACKV:59BACKON:62SDATA:15SBUSY:14REM:44DMF-9020(K) INT1,1P( 98.11.26 5:24 PM yW11DMF-9020/9020(S)/MD-20707CIRCUIT DESCRIPTIONPin No. Port Name I/O Descri

15、ption1 SCLK O Text data read clock2 NC O no use3 XMODE O Text data decode LSI reset L : POWER DOWN4-6 NC O no use7 RESET Microprocessor reset8 VDD Microprocessor power supply (+)9 X2 O Oscillation (12MHz)10 X1 I Oscillation (13MHz)11 VSS Microprocessor GND 12,13 NC O no use14 DATA I/O IBM key board

16、I/F data line15 CLOCK_CHG O IBM key board I/F data output line H : CLOCK LINE LOW16-20 NC O no useLC89170M CYBER TITLERMECHA uCOM(X25) J7(X25) IC31(X25) J2(X25) IC27(X25) IC28 (X25) IC30IBM KEYBOARDDQSYDQSY731ADDRESS434240403938373635343332313029ASTB 44RD 23WR 22CS 21/DATAHM62256BLFP-8TTC-74HCT373AF

17、 SRAM BASSCLKSRDTXMODETTXDTRXDMTXDMRXDMENADATACLOCKCLOCK_CHG7838079SUBU-COM515049147715RxDCRxDCTxDDATACLOCKCENATxDSCLKSRDTXMOD2. Sub microprocessor : uPD784035GC836 (X25 : IC28)2-1 Microprocessor peripley block diagram2-2 Pin description1-3 InitializationPOWER = ON (DM-9090,DM-5090)REC INPUT = ANALO

18、GAUTO CUT = OFFAUTO/MANUAL = AUTO= 0 dBPLAY MODE = TRACKREPEAT = OFFTIME DISPLAY = SINGLE(+)LEVEL METER MODE = NORMAL MODEAUTO TNO TIME = 2 secAUTO TNO LEVEL = 0 (-55 dB)REC END WRITE = ONDRIVE = ONPRESET TITLE = PRE1 : PopsPRE2 : RockPRE3 : ClassicPRE4 : JazzPRE5 : DiscoPRE6 : Best HitsPRE7 : Air C

19、heckPRE8 : No.PRE9 : Vol.: Backup item1-5 Key voltage matrixModel INISW INISW DMF-90203.5 (V)MD-2070HIGH1-4 Switch control tableNo. Name I/O Description66 SWDT O Data for writing to CXD2652AR (IC2)67 SCLK O Serial clock to CXD2652AR (IC2)- -H; ONH; ON80 - O No used / pull upH; ON83 ADRST O Data to S

20、M5844AF (IC25) ADC reset8491 AD0AD7 O SRAM address / data (AD0AD7)9299 A8A15 O SRAM address (A8A15)100 Vss - GNDDIGITAL REC LEVELFADE = OFFFADE TIME = 3sec68,69,70 N.C.71 EXDT O Extension port data72 FLDCE O CE to FL driver IC(LC75710NE)73 DRDT I Data for reading form DIR.(LC8904Q)74 DWDT O Data for

21、 writing to DIR.(LC8904Q) ,FL driver IC(LC75710NE)75 DCLK O Clock to DIR.(LC8904Q) ,FL driver IC(LC75710NE)76 DLAT O Latch to DIR.(LC8904Q)77 DEMPH I Emphasis form DIR.(LC8904Q) 78 DSUB1 I SUB1 form DIR.(LC8904Q) 79 DSUB2 I SUB2 form DIR.(LC8904Q) 80 SRCLAT O Latch to SRC.(SM5844AF)82 SRCCK O Clock

22、to SRC.(SM5844AF)83 SRCDT O Data to SRC.(SM5844AF)0.0V 0.8V 1.6V 2.4V 3.2V 4.0VKR0 POWER EJECT PAUSE - FF -KR1 STOP REC PLAY - FBTTSEARCHKR2FADE/ EDIT/ TT RECMONITOR -DEL SPACE INPUT INPUTKR3 SETENTER/ REC MODE/- - -TIME CHRDMF-9020(K) INT1,1P( 98.11.26 5:24 PM yW14DMF-9020/9020(S)/MD-20708CIRCUIT D

23、ESCRIPTION4. Test mode of the unit4-1 Setting of the test modeWhile pressing the REC/INPUT key, plug the AC powercord into the AC wall outlet.4-2 Contents of the test modeChoose the 3 mode by TIMER switch position below.NONE means none mode.(1) INSPECTION mode ENGLISH display (2secs) “ NIAGARA TEST

24、“ displayDot : NiagaraSegment : All lighting Push a key, then cancel “ NIAGARA TEST “Display KEY 028 into the KEY-TEST mode.Push a key, then display KEY .(2) ERROR RATE mode Function of the key Function of the key5. Microprocessor resetThe microprocessor can be initialized while pressing theEJECT ke

25、y, plug the AC power cord into the AC walloutlet.6. Mechanism test modeRefer to 1050MD/DM-5090/MD-9090 service manual (B51-5387-00), if you see this test mode.TIMER SW Mode(1) REC INSPECTION(2) PLAY ERROR RATEOFF NONEKey ModeREC/INPUT KEY-TESTEDIT NIAGARA TESTTITLE INPUT None all lightingKey Functio

26、nPLAY CPLAY (MID)REC CREC (MID)STOPSTOP CPLAY, CREC(2time push) ERROR RATEPin No. Port Name I/O Description21 CS (SRAM) O SRAM control. chip select H : POWER DOWN22 WR SRAM control. write strobe signal output23 RD SRAM control. read strobe signal output24-28 NC O no use29-35 A14-8 SRAM control. addr

27、ess bus36-42 AD7-1 SRAM control. address/data bus43 AD0 SRAM control. address/data bus L : POWER DOWN44 ASTB SRAM control. address strobe signal output 45 VSS Microprocessor GND 46 TEST Microprocessor TEST47,48 NC O no use49 MENA O Mechanism-microprocessor. enable50 MRXD Mechanism-microprocessor. da

28、ta in line (UART)51 MTXD O Mechanism-microprocessor. data out line (UART)52-54 NC O no use55 VDD Microprocessor power supply (+)56-61 NC I no use62 CTR_JIS I Cyber titler. for JIS code H : JIS63 TXT_JIS CD TEXT. for JIS code H : JIS64 AVDD A/D power supply65 AVref1 A/D reference voltage input port (

29、+5V)66 AVSS A/D GND67,68 NC O no use69 AVref2 D/A reference voltage input port (+5V)70 AVref3 A/D reference voltage input port (GND)71,72 NC I no use73 DQSY Text data read permit L : interrupt74-76 NC I no use77 CLOCK I IBM key board I/F clock line L : interrupt78 SRDT I Text data read line79 TRXD I

30、 Cyber titler. data in line (UART)80 TTXD O Cyber titler. data out line (UART)AD1855SERIAL DATAINTERFACE16-/18-/20-/24-BITDIGITALDATA INPUT25 27319 520 ,1 9 8 ,62711 , 24 23 18 2212 , , ,10281413 16 171521SERIALMODEDIGITALGNDANALOGGND RD/RST MUTE DE-EMPHASISANALOGSUPPLYZEROFLAGANALOGOUTPUTS384/25696

31、/48FsCLOCKDIGITALSUPPLYCONTROL DATAINPUTCLOCKINX2MCLKATTEN/MUTE8xINTERPOLATORMULTIBIT SIGMA-DELTA MODULATOROUTPUTBUFFERCLOCKCIRCUITVOLTAGEREFERENCESERIAL CONTROLINTERFACEOUTPUTBUFFERDACDACMULTIBIT SIGMA-DELTA MODULATOR8xINTERPOLATORATTEN/MUTE3. D/A converter : AD1855 (X25 : IC7)Block diagram (No. of

32、 : pin No.)DMF-9020(K) INT1,1P( 98.11.26 5:24 PM yW15EBE BEBEBE BEBEBE BE BQ5Q12D2D26D31Q24Q23IC21Q45D6Q6Q20D18D33IC17IC16IC18IC36IC38Q25IC33D12D13D3D16D14D15D7D8Q8Q9D17Q10D20D19D25IC39IC30Q27IC32D23D22D36D32D37D38Q32C216R357R215R98R160R159R356R355R354R201C201R202R203R164R23R24R116R207 C202C211R211R

33、218C213R216R219C290C122R126R125R46R35R385R33R176R190R241C207R21R330R331R328R350R332R329R333R244R151R150R383R382R411R152R145C48C95R403R416C123C124C453R317C302C325C303R316R318C301C91C308R147R146R20C34C35R11R10R12C22C24C26C27C18R6R169R153R157R162R163R165R144R143R384R108R109R16R17R456R455R7R13R14R8W1C39

34、R180R123C166C172C171R127R113R111R96R124R122C178C165C177 R106R19R388R386R97R387R394C212R186R189R185C315R301R297C175C176R188R187R308C230R227R223R226R225R224R228R229R231R233R232C214C405R234C220R119R405C209R239R236C226R319R209R15R120R287C306R349R302R298R313R368R325R366R300R369C311C309C312C310R365R364R36

35、3R321R345R361C228R286R344C322R246R247R375R220R293R294R372C318R360R359R358C400C210R212R214R310R376R338R299C321C319R235C317C224C222R238R195R114R121R117R409R118R142R141R292R451C451R240L2R289R305R306R303R377R378L1L4L3C183C184C223C219R245R324R278R277R22R452C452R32R408R158R16111011 20110112017148171481781

36、4181691781418169171481011120EBEBE BE BR128R129R42R41R44R284R290R213R48C324C323R173R175R210C208R166R174R217R205 C203 R204R206C10R49R171 R167 R168R172R47R99R100R107R155R83R283R339C121C5C6R85C404C406R154R82 R84C408R402R404C402R414C407C403C409R407R312R401R412C170C169R327R326R342R311R322R336R323C305R320R

37、390C401R170R110R18R9R115R112R101C206R105C109C108R389R102R103C99R104R413R415R140R374R352R156R381R380R379R222C218C217R230R193C316R295C221R237R282C205R194R296R315R341R393R314R288R346R340R348R347R337R362R335 R334 R351R353R370R371R196R457R221R391R285C229C411C110C111C112R304R343R307R309C225C227C232R280R28

38、1R279R454C4108012021 40416061111122223 333444333423221211 144110112018169112132425 363748185485148514148511428151 7814171481008131505180301114281528114151714881417176 116RINLINROUTLOUT12.0MHz22.5792MHz256fsCEPOWER12.5MHzADDTC28SGNDBUSYSDATAGNDSGNDBUSYSDATAGND929DRIVELOAD1918 111P1MICOM17 1R191C142R4

39、3X1C94C129C148C241C128C146C134C136C130C135C139C144C133C137C127C126C138C132C143R192R45C3C23C42C41C21R27C20C2C191X2C105C104C93C92C47C304C125C31C307C4C17C25C16C15C19C30C13C140C180C164C160C156C152C151C155C158C29C32C33C36C38C40C37C162C181C163 C159C153C149C150C154C157C167 C168C182C101C215C231X3C103C119IOG

40、EBEB1IGOEBEBEBEBEBEBOIOIB E14BEE BE BEBE BB EIC15IC26IC34IC31IC25Q46IC13Q30Q31IC14IC22IC37D29IC29IC28IC23IC27IC11IC10IC8Q21Q22D24IC24Q28IC7IC2IC1WH2CN2 CN3Q18CN4J5Q13A1J6IC35E1A2Q44J3Q16 Q19Q17Q42E4CN8J4IC5CN1D1D11Q11D21Q7IC4D10J2J1CN5D9CN14E3J7WH3X25-6170-00 A/2 (J70-1263-21)X25 B/2MICOME24POWER SU

41、PPLY4D.R.I.V.EADCSRCDIRDACCLOCK GENLPFCN7WH1TXSYSTEM CONTROLPLAY OUTOPT. COAX.REC IN3COAX. OPT.2COAX.1DIGITALREC INPLAY OUTLINERX9ACEBD2 1357 46Refer to the schematic diagram for the value of resistors and capacitors. PC BOARD (Component side view)DMF-9020(K) INT1,1P( 98.11.26 7:09 PM yW18FGIHJ2 1357 46Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD (Component side view)10DMF-9020(K) INT1,1P( 98.11.26 7:06 PM yW17