Kenwood-DMF3020-md-sm 电路图 维修手册.pdf

《Kenwood-DMF3020-md-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Kenwood-DMF3020-md-sm 电路图 维修手册.pdf（25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 are reproductions of labels on, or inside the product relating to laser product safety, KENWOOD-Corp. certifies this equipment conforms to DHHS Regulation No.21 CFR 1040.10, Chapter 1, Subchapter J. DANGER : Laser radiation when open and interlock de

2、feated. AVOID DIRECT EXPOSURE TO BEAM. Illustration is DMF-3020. * Refer to parts list on page 23. STEREO MINIDISC RECORDER DMF-3020/3020(S)/5020 MD-203 SERVICE MANUAL 1998-9/B51-5480-00 (K/K) 2945 REC IN R L R L PLAY OUT (VARIABLE) PLAY OUT OPT.COAX. REC IN 2 COAX.1 OPT. LINESYSTEM CONTROL DIGITAL

3、MIN REC LEVEL PHONES ENTER /TIME DISPLAY REC MODE/CHARAC. SET REC INPUT MONITOR /DELETE STANDBY POWER JOG DIAL TITLE INPUT EDIT/SPACE MAX DISC LOADING MECHANISM STEREO MINIDISC RECORDER 1 37 0 - ON OFF TIMER ? ? REC OFF PLAY OUTPUT LEVEL 4 REC Phone jack * (E11-) Knob (K29-7536-04) Panel (A60-1530-1

4、1) Indicator (B12-0353-04) Knob (K27-2178-04) Phono jack (E63-1065-05) Metallic 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-

5、0376-04) Front glass (B10-3426-03) Escutcheon * (B07-) Knob (K29-7412-02) Knob (K29-7412-02) Knob (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 2 RadioFans.CN 收音机爱 好者资

6、料库 Caution on condensation Condensation (of dew) may occur inside the unit when there is a great difference in temperature between this unit and the outside. This unit may not function properly if condensation occurs. In this case, leave the unit for a few hours with the power left ON, and restart t

7、he operation after the condensation has dried up. Be specially cautious against condensation in a follow- ing circumstance: When this unit is carried from a place to another across a large difference in temperature, when the humidity in the room where this unit is installed increases, etc. Memory ba

8、ckup The typical period for which the memory can be backed up while the power cord is unplugged or the POWER key is set to the OFF position is about 3 weeks, though this may be variable depending on the surrounding environment. In case of long hours of power failure or slipping out of the power cord

9、, the data related to recording and editing (that is usually recorded at the moment the Mini Disc is ejected) may be cleared or destroyed before it is written in the Mini Disc. Remember that the data lost cannot be recovered. After recording or editing, be sure to eject the Mini Disc so that the rec

10、ording or editing data can be written in the disc. Operation to reset The microprocessor may fall into malfunction (impossibility to operate erroneous display, etc.) when the power cord is unplugged while power is ON or due to an external factor. In this case, execute the following procedure to rese

11、t the microprocessor and return it to normal condition. With the POWER key left to ON, unplug the power cord from the power outlet then, while holding the eject (0) key depressed, plug the power cord again. ?Please note that resetting the microprocessor clears the contents stored in, it returns the

12、microprocessor to the condition when it left the factory. Before transporting or moving this unit, carry out the following operations. 1. Set 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 shown appears.

13、3. Set the POWER key to OFF. Note related to transportation and movement N OD I S C DMF-3020/3020(S)/5020/MD-203 2 CONTENTS/ACCESSORIES/CAUTIONS CONTENTS/ACCESSORIES/CAUTIONS.2 CONTROLS .3 BLOCK DIAGRAM .5 CIRCUIT DESCRIPTION.6 PC BOARD . 8 SCHEMATIC DIAGRAM . 11 EXPLODED VIEW .21 PARTS LIST.23 SPEC

14、IFICATIONS .Back cover CONTENTS Remote 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) batteries (For RC-M0705) R6 (AA-size) batteries (For RC-M0302) Check that the following accessories are prese

15、nt. 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 Cautions Refer to the Service manual, if you see the IC40, 41 on the X25 (PCB) PCBRef No.Parts No.Refer to Service manualParts N

16、o.Page X25IC40KAN06DV-203/2070, DVF-5010/9010/K7010B51-5456-0020 X25IC41PCM1716EDV-203/2070, DVF-5010/9010/K7010B51-5456-0021 DMF-5020(K) COVER1,1P( 98.12.9 16:39 yW 3 RadioFans.CN 收音机爱 好者资料库 DMF-3020/3020(S)/5020/MD-203 3 CONTROLS 1POWER key : Press to turn the unit ON and OFF. : The unit may enter

17、 the standby mode when the POWER key is pressed to turn it ON. This is because the unit holds the memory that it has been put to the standby mode by the remote control unit in the last operation. 2Remote control sensor 3Mini Disc insertion slot : When a Mini Disc is inserted while the unit is in the

18、 standby mode, 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 reverse key during playback. : During an editing mod

19、e, press to move the title input cursor or 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, press to move the title input cursor or to scroll the track title display to the right. 9Pause (

20、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 INPUT key : Press to switch the

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

22、. %REC MODE/CHARAC. (Character) key REC MODE : Press to switch the recording setting adjustment modes (record modes) ON/OFF. CHARAC. : Press to select a character group during the title input operation. Description of main unit keys SET key : For use in setting the editing result and input title in

23、memory. : When pressed in the recording pause mode, the MEMORY REC function is set and recording starts from the sound approximately 6 seconds before the current sound. DIGITAL 1 5RDOSRAM read strobe 6WROSRAM write strobe 7CSOSRAM CSL; SRAM enable 8ASTBOSRAM address strobe 9Vdd-Power supply (Micropr

24、ocessor) 10POWEROPower terminalH; Power ON 11MUTEOMute control outputL; Mute ON 12INISW2IDestination selector L; DMF-3020/5020 13SCHNGOE2PROM data IN/OUT change-overH; SDA output 14SBUSYI/O16 serial busy 15SDATAI/O16 serial data 16SCLOE2PROM clock 17SDAI/OE2PROM data 18LDONOLaser ON / OFF control po

25、rtH; LD ON 19RMSOPick RMSH; ON 20XLATOSystem IC latch 21SENSISystem IC sens 22Vpp-GND 23PROTECTIDetection port of protect switchL; Protect ON 24REFLECTIDetection port of reflect switchH; Low reflect 25DISCINIDetection of disc input switchL; Disc out SW ON 26STTLMTIDetection port of limit switchL; St

26、art limit SW ON 27PHOTSWIDetection of mechanism play positionL; Photo sensor ON 28REC SWIInput port of detection from REC position switchL; REC SW ON 29LOADINOOutput port of loading motor control signalL; Loading OUT 30LOADOUTOOutput port of loading motor control signalL; Loading IN 31MNT0IFOK signa

27、l from CXD2652AR (IC2)L; Focus ON 32MNT2IInput port of monitor 2 from CXD2652AR (IC2) 33XRSTOOutput port of reset signal to CXD2652AR (IC2) 34TXOOutput port of recording permitted signal 35RECPOLaser power control to CXD2652AR (IC2) 36MNT3IInput port of monitor 3 from CXD2652AR (IC2) 37Vdd-Power sup

28、ply (Microprocessor) 38,39-Clock IN / OUT (12.5MHz) 40GND-GND 41OPENONo used 42GNDINo used 43RESETIMicroprocessor hard reset 44REMIRemocon signal input terminal 45XINTIInput port of interrupted status from CXD2652AR (IC2) 46CEIMicroprocessor chip enableH; Enable / L; disable 47SQSYIInput port of sub

29、 code Q from CXD2652AR (IC2) 48DQSYIU-bit of digital IN / SUB Q sync input of CD format from CXD2652AR (IC2) 49DDQSYIN.C. 50MNT1IInput port of track jump detection from CXD2652AR (IC2) 51Vdd-Microprocessor power supply (+5V) 52AVref 0-A/D reference voltage (Connect Vdd) 5356KR0KR3IKey return (KR0KR3

30、) 57TMSWITimer switch input 0.0V OFF1.25V PLAY3.7V REC5.0V 58INISW1IDetection selector 59BACKIBack up voltage detection (Less than 2.2V : NG) 60PROTIProtection detection 61GND-GND 62BACK ONOBack up charge controlH; Charge ON 63ENCAIRotary encoder A 64AVref 1-D/A reference voltage (+5V) 65SRDTIData f

31、or reading input from CXD2652AR (IC2) 1-2 Pin description 1. Main microprocessor : uPD784215GF532 (X25: IC31) 1-1 Microprocessor peripley block diagram E2PROM RF AMP ML:77 ADRST:83 PROT:60 DINSEL:4 STBLED:76 RECLED:86 DRON:71 MC:79 DARST:3 MD:78 ENCB:70 31:MNT0 50:MNT1ATRAC DRAM (X33) IC7 (X33) IC2

32、(X33) IC1 (X33) IC6 (X25) IC34 (X25) IC33 36:MNT3 32:MNT2 CXD2652AR 66:SWDT 20:XLAT 67:SCLK 65:SRDT 33:XRST 21:SENS 47:SQSY 48:DASY 45:XINT 35:RECP 34:TX 18:LDON MAIN u-COM 19:RMS CXA2523AR 13:SCHNG DWDT:74 DCLK:75 17:SDA 16:SCL LC75710NE ENCODER FL DRIVER (X25) S1 (X25) IC1 FLDCE:72 23:PROTECT 24:R

33、EFLECT 25:DISCIN (MDM-04) MD MECHA. ENCA:70 27:PHOTSW 26:STTLMT POWER:1028:RECSW MUTE:1129:LOADIN INISW2:12 INISW1:58 30:LOADOUT TMSW:575:RD KR2:55 KR3:56 7:CS 6:WR SRAM 8BIT MEMORY LATCH AD/DA CONVERTER KR1:54 KR0:53 84:AD0 91:AD7 BUS DMF3020 MD203 DMF5020 92:A8 PCM1716PCM3002 98:A14 RESET:43 PCM30

34、03 (AD)(AD) (DA)(DA) CE:46 BACKCHK:85 BACKV:59 BACKON:62 SDATA:15 SBUSY:14 REM:44 DMF-5020(K) COVER1,1P( 98.12.9 16:39 yW 11 DMF-3020/3020(S)/5020/MD-203 7 CIRCUIT DESCRIPTION PINPIN NAME I/ODESCRIPTION 1,2VCC1-ADC ANALOG POWER SUPPLY 3VINRIRCH ANALOG INPUT 4,5VREF1,2-REFERENCE VOLTAGE 1,2 6VINLILCH

35、 ANALOG INPUT 7PDADIADC POWER DOWNL: ON 8PDDAIDAC POWER DOWNL: ON 9SYSCKISYSTEM CLOCK INPUT256fs 384fs 512fs 10LRCINISAMPLING CLOCK INPUT 11BCKINIBIT CLOCK INPUT 12DOUTODIGITAL AUDIO DATA OUTPUT 13DGND-DIGITAL GND PINPIN NAME I/ODESCRIPTION 14VDD-DIGITAL POWER SUPPLY 15DINIDIGITAL AUDIO DATA INPUT 1

36、620BITI20/16 BIT DATA FORMAT CHOICE 17,18DEM1,0IDE-EMPHASIS CONTROL 1,0 19VOUTLOLCH ANALOG OUTPUT 20VOUTRORCH ANALOG OUTPUT 21VCOM-ANALOG AMP COMMON 22AGND2-DAC ANALOG GND 23AGND1-ADC ANALOG GND 24VCC2-DAC ANALOG GND (PCM3003E:DMF-5020) V L IN V R IN VL OUT VR DAC ADC OUT V1 REF V2 REF VCOM AGND2 (

37、) PCM-3003 AGND1DGND1Vcc2Vcc1VccSYSCK ZERO (PCM 3002ONLY) (PDDA) (20BIT) ML MD(DEM1) MC(DEM0) DOUT DIN BCKIN LRCIN RST(PDAD) Analog front-end Analog front-end Modulator Modulator (+) (-) (+) (-) Analog L.P.F. Analog L.P.F. MPX level modulator MPX level modulator Zero detect Decimation H.P.F. Decimat

38、ion H.P.F. Serial I/O Model/format control I/O Reset power down Zero detect CLOCKPower supply 8fs O.S.F. (Inter pol.) Vref 2-2 Block diagram 3. Test mode of the unit 3-1 Setting of the test mode While pressing the REC/INPUT key, plug the AC power cord into the AC wall outlet. 3-2 Contents of the tes

39、t mode Choose the 3 mode by TIMER switch position below. NONE means none mode. (1) INSPECTION mode ENGLISHdisplay (2secs) NIAGARA TEST display Dot: Niagara Segment: 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

40、 mode Function of the key Function of the key 4. Microprocessor reset The microprocessor can be initialized while pressing the EJECT key, plug the AC power cord into the AC wall outlet. 5. Mechanism test mode Refer to 1050MD/DM-5090/MD-9090 service manual (B51- 5387-00), if you see this test mode. T

41、IMER SWMode (1)RECINSPECTION (2)PLAYERROR RATE OFFNONE KeyMode REC/INPUTKEY-TEST EDITNIAGARA TEST TITLE INPUTNone all lighting KeyFunction PLAYCPLAY (MID) RECCREC (MID) STOP STOP CPLAY, CREC (2time push) ERROR RATE PINPIN NAME I/ODESCRIPTION 1,2VCC1-ADC ANALOG POWER SUPPLY 3VINRIRCH ANALOG INPUT 4,5

42、VREF1,2-REFERENCE VOLTAGE 1,2 6VINLILCH ANALOG INPUT 7RSTIRESETL: ON 8MLICONTROL DATA INPUT LOAD STOROBE 9SYSCKISYSTEM CLOCK INPUT256fs 384fs 512fs 10LRCINISAMPLING CLOCK INPUT 11BCKINIBIT CLOCK INPUT 12DOUTODIGITAL AUDIO DATA OUTPUT 13DGND-DIGITAL GND 14VDD-DIGITAL POWER SUPPLY 15DINIDIGITAL AUDIO

43、DATA INPUT 16ZEROIZERO FLAG OUTPUTL: ON 17MDICONTROL DATA INPUT 19VOUTLOLCH ANALOG OUTPUT 20VOUTRORCH ANALOG OUTPUT 21VCOM-ANALOG AMP COMMON 22AGND2-DAC ANALOG GND 23AGND1-ADC ANALOG GND 24VCC2-DAC ANALOG GND 0.0 V0.8 V1.6 V2.4 V3.2 V4.0 V KR0TT INPUTRECMONITOR/ INPUTDEL KR1EJECTSTOPFBREC SET MODE K

44、R2PLAYFFEDIT/ENTER/ SPACETIME KR3PAUSERECLEVELLEVEL UPDOWN Vdd=5.0V 5.0V : KEY OFF 1-3 Initialization POWER= ON (DM-9090,DM-5090) REC INPUT= ANALOG AUTO CUT= OFF AUTO/MANUAL= AUTO OUTPUT LEVEL= 0 dB PLAY MODE= TRACK REPEAT= OFF TIME DISPLAY= SINGLE(+) LEVEL METER MODE= NORMAL MODE AUTO TNO TIME= 2 s

45、ec AUTO TNO LEVEL= 0 (-55 dB) REC END WRITE= ON DRIVE= ON PRESET TITLE= PRE1 : Pops PRE2 : Rock PRE3 : Classic PRE4 : Jazz PRE5 : Disco PRE6 : Best Hits PRE7 : Air Check PRE8 : No. PRE9 : Vol. : Backup item 1-5 Key voltage matrix ModelINISW INISW DMF-3020 3.5 (V) MD-203LOW DMF-50201.5 (V) 1-4 Switch

46、 control table No.NameI/ODescription 66SWDTOData for writing to CXD2652AR (IC2) 67SCLKOSerial clock to CXD2652AR (IC2) 68,69-N.C. 70ENCBICommunication to sub u-COM (IC28) Rotary encoder B 71DRONODSP (D.R.I.V.E : IC40) drive onH; ON 72FLDCEOLatch to FL driver 73-IN.C. 74DWDTOData to LC75710NE (IC1) 7

47、5DCLKOClock to LC75710NE (IC1) 76STB LEDOLatch to LC8904Q (IC23) Standby LED ON/OFFH; ON 77MLODAC (IC41) control latch 78MDODAC (IC41) control data 79MCODAC (IC41) control clock 80-ONo used / pull up 81BACKCHKOBack up voltage check 82REC LEDOClock to SM5844AF (IC25) REC LED ON/OFFH; ON 83ADRSTOData

48、to SM5844AF (IC25) ADC reset 8491AD0AD7OSRAM address / data (AD0AD7) 9299A8A15OSRAM address (A8A15) 100Vss-GND 2. AD/DA converter : PCM3002E, PCM3003E (X25: IC8) 2-1 PIN DESCRIPTION (PCM3002E: DMF-3020,MD-203) DMF-5020(K) COVER1,1P( 98.12.9 16:39 yW 14 8 ABDCE 2 1 3 5 7 4 6 Refer 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 yW 15