Kenwood-MD-203-Service-Manual电路原理图.pdf

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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-3020.* Refer to parts list on page 23.STEREO MINIDISC RECORDERDMF-3020/3020(S)/5020MD-203SERVICE MANUAL1998-9/B51-5480-00 (K/K) 2945REC INR LR LPLAY OUT(VARIABLE)PLAYOUTOPT.COAX.RECIN2 COAX.1 OPT.LINESYSTEMCONTROLDIGITALMINRECLEVELPHONESENTER/TIME DI

3、SPLAYREC MODE/CHARAC.SETREC INPUTMONITOR/DELETESTANDBYPOWERJOGDIALTITLE INPUTEDIT/SPACEMAXDISC LOADING MECHANISMSTEREOMINIDISC RECORDER1370- ON OFFTIMERCRCRREC OFF PLAYOUTPUTLEVEL4RECPhone jack *(E11-)Knob(K29-7536-04)Panel(A60-1530-11)Indicator(B12-0353-04)Knob(K27-2178-04)Phono jack(E63-1065-05)Me

4、tallic cabinet(A01-3635-01)Miniature phono jack(E11-0293-05)Phono jack(E63-0160-05)Optic receiving module(W02-1181-05)Oscillating module(W02-1114-05)AC power cord * (E30-)Power cord bushing(J42-0083-05)Filter(B11-0376-04)Front glass(B10-3426-03)Escutcheon *(B07-)Knob (K29-7412-02)Knob(K29-7412-02)Kn

5、ob(K29-7354-14)KENWOOD badge (B43-0302-04) Refer to 1050MD/DM-5090/DM-9090 service manual(B51-5387-00) if you see the mechanism test mode.DMF-5020(K) COVER1,1P( 98.12.9 16:39 yW2Caution on condensationCondensation (of dew) may occur inside the unit when there is a greatdifference in temperature betw

6、een this unit and the outside.This unit may not function properly if condensation occurs. In thiscase, leave the unit for a few hours with the power left ON, andrestart the operation after the condensation has dried up.Be specially cautious against condensation in a follow-ing circumstance:When this

7、 unit is carried from a place to another across a largedifference in temperature, when the humidity in the room where thisunit is installed increases, etc.Memory backupThe typical period for which the memory can be backed up while thepower cord is unplugged or the POWERkey is set to the OFFpositioni

8、s about 3 weeks, though this may be variable depending on thesurrounding environment.In case of long hours of power failure or slipping out of the power cord,the data related to recording and editing (that is usually recorded at themoment the Mini Disc is ejected) may be cleared or destroyed beforei

9、t is written in the Mini Disc. Remember that the data lost cannot berecovered.After recording or editing, be sure to eject the Mini Disc so that therecording or editing data can be written in the disc. Operation to resetThe microprocessor may fall into malfunction (impossibility to operateerroneous

10、display, etc.) when the power cord is unplugged while poweris ON or due to an external factor. In this case, execute the followingprocedure to reset the microprocessor and return it to normal condition.With the POWER key left to ON, unplug the power cordfrom the power outlet then, while holding the

11、eject (0)key depressed, plug the power cord again.CRPlease note that resetting the microprocessor clears the contentsstored in, it returns the microprocessor to the condition when it leftthe factory.Before transporting or moving this unit, carry out thefollowing operations.1.Set the POWER key to ON

12、without loading a Mini Disc.CRCheck that no disc is present in the unit.2.Wait a few seconds and verify that the display shownappears.3.Set the POWER key to OFF.Note related to transportation and movementNODISCDMF-3020/3020(S)/5020/MD-2032CONTENTS/ACCESSORIES/CAUTIONSCONTENTS/ACCESSORIES/CAUTIONS.2C

13、ONTROLS.3BLOCK DIAGRAM.5CIRCUIT DESCRIPTION.6PC BOARD.8SCHEMATIC DIAGRAM.11EXPLODED VIEW.21PARTS LIST.23SPECIFICATIONS.Back coverCONTENTSRemote control unit (1)RC-M0705 (A70-1238-05)(A70-1239-05)Battery cover (A09-1116-08)Battery cover (A09-0374-08)(For DMF-5020)Batteries (2)R03 (“AAA“-size) batteri

14、es (For RC-M0705)R6 (“AA“-size) batteries (For RC-M0302)Check that the following accessories are present.Audio (E30-0505-05)(E30-2733-05)(B19-1529-05)cord (2)System control cord (1)Optical fiber cable (1)Remote control unit (1)RC-M0302 (For DMF-3020/MD-203)AccessoriesCautions Refer to the Service ma

15、nual, if you see the IC40, 41 on the X25 (PCB)PCBRef No.Parts No.Refer to Service manualParts No.PageX25IC40KAN06DV-203/2070, DVF-5010/9010/K7010B51-5456-0020X25IC41PCM1716EDV-203/2070, DVF-5010/9010/K7010B51-5456-0021DMF-5020(K) COVER1,1P( 98.12.9 16:39 yW3DMF-3020/3020(S)/5020/MD-2033CONTROLS1POWE

16、R key: Press to turn the unit ON and OFF.: The unit may enter the standby mode when the POWER keyis pressed to turn it ON. This is because the unit holds thememory that it has been put to the standby mode by theremote control unit in the last operation.2Remote control sensor3Mini Disc insertion slot

17、: When a Mini Disc is inserted while the unit is in the standbymode, it is turned ON automatically.4Eject (0) key: Press to eject the Mini Disc.5Stop (7) key: Press to stop playback or recording.6Play (3) key: Press to start playback.7Manual search down (1) key: This key functions as the fast revers

18、e key during playback.: During an editing mode, press to move the title input cursoror to scroll the track title display to the left.8Manual search up (CR) key: This key functions as the fast forward key during playback.: During an editing mode, press to move the title input cursoror to scroll the t

19、rack title display to the right.9Pause (8) key: Press to let playback or recording pause temporarily.0REC LEVEL knob: Rotate to adjust the analog recording level.!TIMER switch: This switch is used in timer playback and timer recording.TITLE INPUT key: Press to switch the title input mode ON/OFF.#REC

20、 INPUT key: Press to switch the recording input line between digital(optical/coaxial), analog and monaural.$MONITOR/DELETE keyMONITOR: Press to monitor the sound being input from the sourcewhile the unit is in stop mode.DELETE: During title editing, press to delete a character. During trackediting,

21、press to delete a track.%REC MODE/CHARAC. (Character) keyREC MODE: Press to switch the recording setting adjustment modes(record modes) ON/OFF.CHARAC.: Press to select a character group during the title inputoperation.Description of main unit keysSET key: For use in setting the editing result and in

22、put title in memory.: When pressed in the recording pause mode, the MEMORYREC function is set and recording starts from the soundapproximately 6 seconds before the current sound.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 - P

23、ower supply (Microprocessor)10 POWER O Power terminal H; Power ON11 MUTE O Mute control output L; Mute ON12 INISW2 I Destination selector L; DMF-3020/502013 SCHNG O E2PROM data IN/OUT change-over H; SDA output14 SBUSY I/O 16 serial busy15 SDATA I/O 16 serial data16 SCL O E2PROM clock17 SDA I/O E2PRO

24、M 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 REFLECT I Detection port of reflect switch H; Low reflect25 DISCIN I Detection of disc input switch L;

25、 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 switch L; REC SW ON29 LOADIN O Output port of loading motor control signal L; Loading OUT30 LOADOUT O

26、 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 signal to CXD2652AR (IC2)34 TX O Output port of recording permitted signal35 RECP O Laser power control

27、to CXD2652AR (IC2)36 MNT3 I Input port of monitor 3 from CXD2652AR (IC2)37 Vdd - Power supply (Microprocessor)38,39 - Clock IN / OUT (12.5MHz)40 GND - GND41 OPEN O No used42 GND I No used43 RESET I Microprocessor hard reset44 REM I Remocon signal input terminal45 XINT I Input port of interrupted sta

28、tus 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)49 DDQSY I N.C.50 MNT1 I Input port of track jump detection from CXD2652AR (IC2)51

29、 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 2.2V : NG)60 PROT I Protection detection61

30、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 description1. Main microprocessor : uPD784215GF532 (X25: IC31)1-1 Microprocessor peripley block diagramE2PROMRF AMPM

31、L:77ADRST:83PROT:60DINSEL:4STBLED:76RECLED:86DRON:71MC:79DARST:3MD:78ENCB:7031:MNT050:MNT1ATRACDRAM(X33) IC7(X33) IC2(X33) IC1(X33) IC6(X25) IC34(X25) IC3336:MNT332:MNT2CXD2652AR66:SWDT20:XLAT67:SCLK65:SRDT33:XRST21:SENS47:SQSY48:DASY45:XINT35:RECP34:TX18:LDONMAINu-COM19:RMSCXA2523AR13:SCHNGDWDT:74D

32、CLK:7517:SDA16:SCLLC75710NEENCODERFL DRIVER(X25) S1(X25) IC1FLDCE:7223:PROTECT24:REFLECT25:DISCIN(MDM-04)MD MECHA.ENCA:7027:PHOTSW26:STTLMTPOWER:1028:RECSWMUTE:1129:LOADININISW2:12INISW1:5830:LOADOUTTMSW:575:RDKR2:55KR3:567:CS6:WRSRAM8BIT MEMORYLATCHAD/DA CONVERTERKR1:54KR0:5384:AD091:AD7 BUS DMF302

33、0MD203DMF502092:A8PCM1716PCM300298:A14RESET:43PCM3003(AD)(AD)(DA)(DA)CE:46BACKCHK:85BACKV:59BACKON:62SDATA:15SBUSY:14REM:44DMF-5020(K) COVER1,1P( 98.12.9 16:39 yW11DMF-3020/3020(S)/5020/MD-2037CIRCUIT DESCRIPTIONPIN PIN NAME I/O DESCRIPTION1,2 VCC1 - ADC ANALOG POWER SUPPLY3 VINR I RCH ANALOG INPUT4

34、,5 VREF1,2 - REFERENCE VOLTAGE 1,26 VINL I LCH ANALOG INPUT7 PDAD I ADC POWER DOWN L: ON8 PDDA I DAC POWER DOWN L: ON9 SYSCK I SYSTEM CLOCK INPUT256fs 384fs 512fs10 LRCIN I SAMPLING CLOCK INPUT11 BCKIN I BIT CLOCK INPUT12 DOUT O DIGITAL AUDIO DATA OUTPUT13 DGND - DIGITAL GNDPIN PIN NAME I/O DESCRIPT

35、ION14 VDD - DIGITAL POWER SUPPLY15 DIN I DIGITAL AUDIO DATA INPUT16 20BIT I 20/16 BIT DATA FORMAT CHOICE17,18 DEM1,0 I DE-EMPHASIS CONTROL 1,019 VOUTL O LCH ANALOG OUTPUT20 VOUTR O RCH ANALOG OUTPUT21 VCOM - ANALOG AMP COMMON22 AGND2 - DAC ANALOG GND23 AGND1 - ADC ANALOG GND24 VCC2 - DAC ANALOG GND(

36、PCM3003E:DMF-5020)VLINVRINVLOUTVRDACADCOUTV1REFV2REFVCOMAGND2( ) PCM-3003AGND1 DGND1Vcc2 Vcc1 Vcc SYSCK ZERO(PCM 3002ONLY)(PDDA)(20BIT)MLMD(DEM1)MC(DEM0)DOUTDINBCKINLRCINRST(PDAD)Analogfront-endAnalogfront-endModulatorModulator(+)(-)(+)(-)AnalogL.P.F.AnalogL.P.F.MPX levelmodulatorMPX levelmodulatorZ

37、erodetectDecimationH.P.F.DecimationH.P.F.Serial I/OModel/formatcontrol I/OResetpower downZerodetectCLOCKPower supply8fs O.S.F.(Inter pol.)Vref2-2 Block diagram3. Test mode of the unit3-1 Setting of the test modeWhile pressing the REC/INPUT key, plug the AC powercord into the AC wall outlet.3-2 Conte

38、nts of the test modeChoose the 3 mode by TIMER switch position below.NONE means none mode.(1) INSPECTION mode ENGLISH display (2secs) “ NIAGARA TEST “ displayDot : NiagaraSegment : All lighting Push a key, then cancel “ NIAGARA TEST “Display KEY 028 into the KEY-TEST mode.Push a key, then display KE

39、Y .(2) ERROR RATE mode Function of the key Function of the key4. Microprocessor resetThe microprocessor can be initialized while pressing theEJECT key, plug the AC power cord into the AC walloutlet.5. Mechanism test modeRefer to 1050MD/DM-5090/MD-9090 service manual (B51-5387-00), if you see this te

40、st mode.TIMER SW Mode(1) REC INSPECTION(2) PLAY ERROR RATEOFF NONEKey ModeREC/INPUT KEY-TESTEDIT NIAGARA TESTTITLE INPUT None all lightingKey FunctionPLAY CPLAY (MID)REC CREC (MID)STOPSTOP CPLAY, CREC(2time push) ERROR RATEPIN PIN NAME I/O DESCRIPTION1,2 VCC1 - ADC ANALOG POWER SUPPLY3 VINR I RCH AN

41、ALOG INPUT4,5 VREF1,2 - REFERENCE VOLTAGE 1,26 VINL I LCH ANALOG INPUT7 RST I RESET L: ON8 ML I CONTROL DATA INPUT LOAD STOROBE9 SYSCK I SYSTEM CLOCK INPUT256fs 384fs 512fs10 LRCIN I SAMPLING CLOCK INPUT11 BCKIN I BIT CLOCK INPUT12 DOUT O DIGITAL AUDIO DATA OUTPUT13 DGND - DIGITAL GND14 VDD - DIGITA

42、L POWER SUPPLY15 DIN I DIGITAL AUDIO DATA INPUT16 ZERO I ZERO FLAG OUTPUT L: ON17 MD I CONTROL DATA INPUT19 VOUTL O LCH ANALOG OUTPUT20 VOUTR O RCH ANALOG OUTPUT21 VCOM - ANALOG AMP COMMON22 AGND2 - DAC ANALOG GND23 AGND1 - ADC ANALOG GND24 VCC2 - DAC ANALOG GND0.0 V 0.8 V 1.6 V 2.4 V 3.2 V 4.0 VKR0

43、 TT INPUT REC MONITOR/ INPUT DELKR1 EJECT STOP FB REC SET MODEKR2 PLAY FF EDIT/ ENTER/ SPACE TIMEKR3 PAUSE REC LEVEL LEVEL UP DOWNVdd=5.0V5.0V : KEY OFF1-3 InitializationPOWER = ON (DM-9090,DM-5090)REC INPUT = ANALOGAUTO CUT = OFFAUTO/MANUAL = AUTOOUTPUT LEVEL = 0 dBPLAY MODE = TRACKREPEAT = OFFTIME

44、 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 CheckPRE8 : No.PRE9 : Vol.: Backup item1-5 Key voltage matrixModel INISW

45、INISW DMF-30203.5 (V)MD-203 LOWDMF-5020 1.5 (V)1-4 Switch control tableNo. Name I/O Description66 SWDT O Data for writing to CXD2652AR (IC2)67 SCLK O Serial clock to CXD2652AR (IC2)68,69 - - N.C.70 ENCB I Communication to sub u-COM (IC28) Rotary encoder B71 DRON O DSP (D.R.I.V.E : IC40) drive on H;

46、ON72 FLDCE O Latch to FL driver73 - I N.C.74 DWDT O Data to LC75710NE (IC1)75 DCLK O Clock to LC75710NE (IC1)76 STB LED O Latch to LC8904Q (IC23) Standby LED ON/OFF H; ON77 ML O DAC (IC41) control latch78 MD O DAC (IC41) control data79 MC O DAC (IC41) control clock80 - O No used / pull up81 BACKCHK

47、O Back up voltage check82 REC LED O Clock to SM5844AF (IC25) REC LED ON/OFF H; ON83 ADRST O Data to SM5844AF (IC25) ADC reset8491 AD0AD7 O SRAM address / data (AD0AD7)9299 A8A15 O SRAM address (A8A15)100 Vss - GND2. AD/DA converter : PCM3002E, PCM3003E (X25: IC8)2-1 PIN DESCRIPTION(PCM3002E: DMF-302

48、0,MD-203) DMF-5020(K) COVER1,1P( 98.12.9 16:39 yW148ABDCE2 1357 46Refer to the schematic diagram for the value of resistors and capacitors.PC BOARD (Component side view)DMF-5020(K) COVER1,1P( 98.12.9 16:41 yW15FHJLNGIKMO2 1357 46ADRST91150105010113138TMSW1191911911191293010ICP-N10ICP-N10ICP-N1081XRSTXINSGNDBUSYSDA T AGNDC32X3R234R4C138C82C96C141C142C94C137C11C25C30C