Kenwood-MD203-md-sm 维修电路原理图.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 INRLRLPLAY OUT(VARIABLE)PLAYOUTOPT.COAX.RECIN2 COAX.1 OPT.LINESYSTEMCONTROLDIGITALMINREC LEVELPHONESENTER/TIME DIS

3、PLAYREC MODE/CHARAC.SETREC INPUTMONITOR/DELETESTANDBYPOWERJOG DIALTITLE INPUTEDIT/SPACEMAXDISC LOADING MECHANISMSTEREO MINIDISC RECORDER1370- ON OFFTIMER?REC 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)Meta

4、llic 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)Knob

5、(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 yW 2RadioFans.CN 收音机爱 好者资料库Caution on condensationCondensation (of dew) may occur inside the unit when there is a greatdifferen

6、ce in temperature between 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

7、circumstance:When this 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 POWER key is

8、set to the OFF positionis 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 clea

9、red or destroyed beforeit 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 (impossibili

10、ty to operateerroneous 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 t

11、hen, while holding the eject (0)key depressed, plug the power cord again.?Please 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. S

12、et the POWER key to ON without loading a Mini Disc.?Check 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 movementN OD I S CDMF-3020/3020(S)/5020/MD-2032CONTENTS/ACCESSORIES/CAUTIONSCONT

13、ENTS/ACCESSORIES/CAUTIONS.2CONTROLS .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)B

14、atteries (2)R03 (AAA-size) batteries (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)Accessories

15、CautionsRefer to the Service manual, 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 yW 3RadioFans.

16、CN 收音机爱 好者资料库DMF-3020/3020(S)/5020/MD-2033CONTROLS1POWER 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 op

17、eration.2Remote control sensor3Mini Disc insertion slot: 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 sea

18、rch down (1) key: This key functions as the fast reverse 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 (?) key: This key functions as the fast forward key during playback.: During an editing mode,

19、press to move the title input cursoror to scroll the track 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

20、 key: Press to switch the title input mode ON/OFF.#REC 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 editi

21、ng, press to delete a character. During trackediting, 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 key

22、sSET key: For use in setting the editing result and input 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.&JOG DIALSkip down (4)/ Skip up(?) knob: During playback, rotate to

23、skip tracks.: Before starting recording in record mode, rotate to select therecording setting adjustment mode.: During title search, rotate to select a track number.: During title input, rotate to select a track number or acharacter.: During editing, rotate to select the editing mode or a tracknumbe

24、r.*ENTER/TIME DISPLAY keyENTER: For use in executing the editing and title input operations.TIME DISPLAY: Press to switch the time and title display modes.(EDIT/SPACE keyEDIT: Press to switch the editing mode ON/OFF.SPACE: Press to insert a blank space character during the title inputoperation.)OUTP

25、UT LEVEL DOWN (fi?) key: Use this to decrease the volume of the headphones and theoutput level.?OUTPUT LEVEL UP (%) key: Use this to increase the volume of the headphones and theoutput level.?Record (?) key: Press to start recording.In stop mode: When the ? key is pressed while a recordable disc is

26、presentin the unit, it enters record-pause mode.(It enters record-pause mode at the position immediatelyafter the last existing track.)In record-pause mode: When the ? key is pressed, the SOUND SYNCHRO RECstandby mode is set.: In the SOUND SYNCHRO REC standby mode, the setfunctions in the same way a

27、s in the normal recording pausemode.?PHONES jack: Connect stereo headphones (optional) here.MINREC LEVELPHONESENTER/TIME DISPLAYREC MODE/CHARAC.SETREC INPUTMONITOR/DELETESTANDBYPOWERJOG DIALTITLE INPUTEDIT/SPACEMAXDISC LOADING MECHANISMSTEREO MINIDISC RECORDER137?0- ON OFFTIMER?REC OFF PLAY23456 7 #

28、 $?)&80(?*!%INREPEATFADEOVEROUTOVER (dB)(dB)MONOMANUALA . PAUSERLREMAINTOTALSINGLECOPY?TITLE? 91275134030211801518129364030272415210SEARCHPGMMONITORANALOG32kHz21348kHz44.1kHzDIGITAL19OUTPUTLEVEL4?RECWhile the standby indicator of the unit is lit, a small amount of current is flowing into the units i

29、nternal circuitry to back up the memory.This condition is referred to as the standby mode of the unit. While the unit is in the standby mode, it can be turned ON from the remotecontrol unit.Standby modeDisplay / Main unitDisplayTITLE and SEARCH indicatorsMONO indicatorPGM (Program) indicatorPeak lev

30、el indicatorsListening through headphonesPlug the stereo headphones (with standard-plug) available in audiostores into the PHONES jack and adjust the listening volume with theOUTPUT LEVEL control on the front panel. The default value is 0 dB(maximum volume).ANALOG input indicatorDIGITAL input 1/2 in

31、dicatorsREPEAT indicatorSINGLE, TOTAL andREMAIN indicatorsCharacter informationdisplayA. PAUSE indicatorMANUAL indicatorMONITOR indicatorOperation indicators?REC indicator8 Pause indicator3 Play indicatorSumpling frequencyindicatorsOUTPUTLEVELDMF-5020 onlyDMF-5020(K) COVER1,1P( 98.12.9 16:39 yW 6DMF

32、-3020/3020(S)/5020/MD-2034CONTROLS1Numeric keys / Character editing keysNumeric keys0-9: Press when selecting a track numberdirectly.+10: Press when selecting a track number10 or more.+100: Press when selecting a track number100 or more.: These keys are also used to select acharacter or symbol durin

33、g title editing.CHARACTER DELETE / CLEAR keyCHARACTER DELETE: During title input, press to delete acharacter.CLEAR: During editing, press to clear a selectedtrack number.: In program mode, press to clear theprogram.CHARACTER SPACE / CHECK keyCHARACTER SPACE: During title input, press to insert a bla

34、nkspace character.CHECK: In program mode, press to check theprogram contents.CHARA. (Character)/ P.MODE (PlayMode) keyCHARA.: Press to select a character group dur-ing the title input operation.P.MODE: Press to initiate the program mode.5Editing mode keysREC INPUT key: Press to switch the recording

35、input linebetween digital (optical/coaxial), analogand monaural.EDIT key: Press to switch the editing mode ON/OFF.SET key: This key is used in the title assignment orediting operations.: When pressed in the recording pausemode, the MEMORY REC function is setand recording starts from the sound ap-pro

36、ximately 6 seconds before the cur-rent sound.ENTER key: Press to execute editing or enter theinput title in memory.7Applied operation keysEDIT CANCEL key: Press to cancel the editing operation.TITLE INPUT key: Press to switch the title input mode ON/OFF.TITLE SEARCH key: Press to switch the title se

37、arch modeON/OFF.: During title editing, press to switch thetitle change input mode between the“overwrite mode” and “insert mode”.TIME DISPLAY key: Press to switch the time and title displaymodes.AUTO PAUSE key: When this key is pressed, the pausemode is initiated automatically at thepoint where the

38、track number changesduring playback.: When pressed in the recording or record-ing standby mode, the AUTO REC PAUSEmode is turned on.AUTO/MANU. key: Selects whether the track numbers areto be marked automatically during re-cording (AUTO) or to be marked manu-ally after it (MANUAL).MONITOR key: Press

39、to monitor the sound being inputfrom the source while the unit is in stopmode.METER MODE key: Press to switch the level meter displaycontents.Remote control unit (DMF-3020/MD-203)The remote control unit incorporates the basic operation keys as well as a variety of applied operation keys so that it c

40、an beused in a wide range of purposes.The keys on the remote control unit with the same names as on the main unit have the same function as the keyson the main unit.Model: RC-M0302Infrared ray system3REPEAT key: Press to switch the repeat modes forrepeat playback.RANDOM key: Press to initiate the ra

41、ndom play mode.2ON/STANDBY key: Press to turn the unit between ON andSTANDBY ( /) modes.6Basic operation keys?: Record key8: Pause key7: Stop key3: Play keyCURSOR / 1 , ? keys1 , ?: During playback, press to fast forwardor fast reverse the play.CURSOR: During title input, press to move thecursor.CHA

42、RACTER/SEARCH/4 , ? keysCHARACTER: Press to select a character group dur-ing the title input operation.SEARCH: During title search, rotate to select atrack number.4 , ?: During playback, press to skip tracks inthe forward or reverse direction.ABC1DEF23JKLMNO5GHI46TUVWXY8PRS79POWEREDITCANCELQZ0+100+1

43、0RANDOMREPEATSPACECHARA.CHECKDELETECLEARP.MODEEDITSETREC INPUTENTER87?14?AUTOPAUSEAUTO/MANU.METERMODETIMEDISPLAYOUTPUTLEVELMONITORREMOTE CONTROL UNITRC-M0302CURSORTITLECHARACTER/SEARCHCHARACTER%fi?INPUTSEARCH23456714OUTPUT LEVEL (%fi?) keys: Use these to adjust the output level andthe volume of the

44、headphones.3Character editing keysTIME DISPLAY key: Press to switch the time and title displaymodes.CHARA. (Character)/ P.MODE (PlayMode) keyCHARA.: Press to select a character group dur-ing the title input operation.P.MODE: Press to initiate the program mode.DELETE / CLEAR keyDELETE: During title i

45、nput, press to delete acharacter.CLEAR: During editing, press to clear a selectedtrack number.: In program mode, press to clear theprogram.SPACE / CHECK keySPACE: During title input, press to insert a blankspace character.CHECK: In program mode, press to check theprogram contents.8EJECT (0) key9Edit

46、ing mode keysEDIT CANCEL key: Press to cancel the editing operation.TITLE INPUT key: Press to switch the title input mode ON/OFF.TITLE SEARCH key: Press to switch the title search modeON/OFF.: During title editing, press to switch thetitle change input mode between the“overwrite mode” and “insert mo

47、de”.SET key: This key is used in the title assignment orediting operations.: When pressed in the recording pausemode, the MEMORY REC function is setand recording starts from the sound ap-proximately 6 seconds before the cur-rent sound.ENTER key: Press to execute editing or enter theinput title in me

48、mory.EDIT key: Press to switch the editing mode ON/OFF.Remote control unit (DMF-5020)The remote control unit incorporates the basic operation keys as well as a variety of applied operation keys so that it can beused in a wide range of purposes.The keys on the remote control unit with the same names

49、as on the main unit have the same function as the keyson the main unit.Model: RC-M0705Infrared ray system4MONITOR key: Press to monitor the sound being inputfrom the source while the unit is in stopmode.METER key: Press to switch the level meter displaycontents.RANDOM key: Press to initiate the rand

50、om play mode.REPEAT key: Press to switch the repeat modes forrepeat playback.1ON/STANDBY key: Press to turn the unit between ON andSTANDBY ( /) modes.6Recording-related keysREC MODE key: Press to switch the recording setting ad-justment modes ON/OFF.AUTO/MANU. key: Selects whether the track numbers