Kenwood-KDCMP-425-Service-Manual(2) 电路图 维修手册.pdf

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1、 2003-12 PRINTED IN JAPAN B53-0116-00 (N) 2704 CD RECEIVER KDC-MP425/MP6026 /W6027/W6027Y SERVICE MANUAL Size AA battery (Not suplied) Plastic cabinet assy (A02-1486-13) Lever (D10-4589-04) x2 Screw set (N99-1730-15) DC cord (E30-6295-05) Screw set (N99-1719-05) Escutcheon (B07-3098-02):KDC-MP425 (B

2、07-3083-02):Others Mounting hardware assy (J22-0011-03) Panel assy (A64-3187-12) Remote controller assy (RC-505) (A70-2040-05) CD MECHANISM EXTENSION CORD (24P) : W05-0934-00 MODELTDF PANEL No. TDF NAME KDC-MP425Y33-1920-61TDF-44D KDC-MP6026Y33-1920-64TDF-MP6026 KDC-W6027/W6027YY33-1920-65TDF-W6027

3、TDF PANEL INFORMATION KDC-MP425 Panel assy (A64-3194-12) KDC-MP6026 Panel assy (A64-3197-12) KDC-W6027 /W6027Y DC cord (E30-4958-05) Antenna adaptor (T90-0523-05) Depends on the model. Refer to the parts list. RadioFans.CN 收音机爱 好者资料库 2 KDC-MP425/MP6026 KDC-W6027/W6027Y BLOCK DIAGRAM BUFFER Q101 RDS

4、DECODER IC7 Q201 BUFFER IC1 (V-ILL ONLY) DA CONVERTER IC2 REMOCON RESET SW ENCODER ROTARY S1 WITH LCD DRIVER KEY MATRIX IC1 LCD PANEL DET EJECT SW S1 EJECT ILLUMI DSI SYSTEM MICROPROCESSOR IC2 MPX E-VOL & EXT AMP DIMMER ACC DET TEL MUTE B.U DET PRE MUTE PRE MUTE PRE MUTE DRIVER MUTE IC6 POWER IC IC4

5、 THERMAL PROTECT PRE OUT (REAR/NF) EXT.AMP.CON DIMMER ACC TEL MUTE BACK UP AUX IN (REAR) 3PRE PRE OUT (FRONT) PRE OUT SP OUT SURGE DET SW REGCD MECHA+B SERVOSERVO+BSW 14V Q21 IC9 OPEL DISP I/F WIRED REMO/ SUPPLY IC IC3 POWER ANT CON P CON RESET IC8 SW 5V Q4 PANEL 5V Q152 SW5V S-METER AUDIO OUT IFC O

6、UT PLL-DATA PLL-CLK SW5V AM+B A8V SW3 SW2 SW1 MS CLK MS DATA M MUTE L SW4 M MUTE R LO/EJ M STOP MOSW M RST SERVO+B A8V BU5V CD MECHA+B DATA C CH MUTE CH RST REQ H REQ C CH CLK CH-CON DATA H BACK UP NOISE QUAL S-METER R DATA R CLK FM AM MP IN LEVEL CD QUAL AFS CH SW5V BU5V PANEL DET EJECT DSI L CLK L

7、 DATAS L CE L DATAL VOL A VOL B REMO V DATA V CLK O-CE O-DATA O-CLK PRE MUTE MUTE P-MUTE EXT.AMP.CON DIMMER PHONE ACC DET B.U DET BEEP PS1-0 PS1-1 PS1-2 PS2-0 PS2-2 RST FREE REAR FRONT BU5V BACK UP A8V AUX SW5V BACK UP AM+B FM+B ILLUMI A8V BU5V BU5V BU5V MODE CD,MP3 FM AM CH E-TYPE 3600mV 1372mV 855

8、mV 3600mV K,M-TYPE 3600mV 1800mV 600mV 3600mV TUNER CD CH SWITCH UNIT (X16- ) DAUGHTER UNIT (X89- ) RadioFans.CN 收音机爱 好者资料库 3 KDC-MP425/MP6026 KDC-W6027/W6027Y BB BB A x2 A x2 D C E G F H J How to Disassemble (PANEL ASSY) 1) Remove four screws (A). 2) While holding the section (B) indicated with arr

9、ows, pull and remove PANEL ASSY. DISASSEMBLY FOR REPAIR 3) Pull SWITCH UNIT (C) as indicated in the diagram and re- move knob (D). (The knob (D) is attached to the rotary with hook (E) and it is not possible to remove hook (D) only.) How to install knob (SRC) 1) Place knob (F) and knob (G) in the po

10、sitions indicated in the diagram below. 2) While keeping these positions, use a piece of adhesive tape (H) to hold knobs in position, as shown in the diagarma. 3) Set the rotary (J) position as shown in the diagram. 4) While keeping the letters “SRC” horizontally in position, set it to the rotary on

11、 the panel. 5) Remove the adhesive tape (H). RadioFans.CN 收音机爱 好者资料库 4 KDC-MP425/MP6026 KDC-W6027/W6027Y SWITCH UNIT (X16-2490-10) Ref. No.Application / FunctionOperation / Condition / Compatibility IC1LCD DriverDrives LCD IC2Remote Control ICControls the unit Q2REMO ON SWThe power supply of IC2 is

12、turned on when base level goes “L” Q3Key Illumination SW (Green)Lights Green key-illumination when base level goes “H” Q4Key Illumination SW (Red)Lights Red key-illumination when base level goes “H” Q5Dimmer ControlLights LCD Back Light when base level goes “H” ELECTRIC UNIT (X34-308x-xx) Ref. No.Ap

13、plication / FunctionOperation / Condition / Compatibility IC1System -COMControls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone. IC2E.Vol & N.C.MPXControls the source, volume, tone and FM multiplex detector. Bu5V (5V), Audio8V (8V), FM+B (8V), AM+B (8V), P-CON, ANT-CON IC3Power Suppl

14、y IC IC4Power ICAmplifies the front L/R and the rear L/R to 50W maximum. IC6Muting logic ICControls logic for muting. IC7RDS decoder IC8Reset IC“L” when detection voltage goes below 3.6V or less. IC9SW RegulatorPower Supply for MP3 Q1Serge Detection “L” when the back-up voltage becomes more than 24V

15、 (momentary power down). “H” when the back-up voltage becomes less than 24V. Q2BACK-UP Detection “L” when B.u is present. “H” when B.u is absent or momentary power down is detected. Q3ACC Detection“L” when Acc is present. Q4SW 5VON when the base is “L”. Q21Servo Regulator Q22Servo SW Q23Control Powe

16、r Supply IC Q31Dimmer ControlDimmer ON when the base is “H”. Q41SW Regulator Control Q101Composite signal buffer COMPONENTS DESCRIPTION SW1OUT 1.53.0Audio ON 3.55.0Audio P-CON ON 7.0Audio P-CON, P-ANT ON SW2OUT 2.03.0ILL FM ON 4.0ILL AM ON 5 KDC-MP425/MP6026 KDC-W6027/W6027Y Ref. No.Application / Fu

17、nctionOperation / Condition / Compatibility DSI lights when the base is “L”. Q151DSI DriverDSI turns off when the base is “H”. DSI turns on and off when panel is taken off. Q152Panel 5V SW When the panel is attached, the base goes “L”, turning the Tr ON to supply 5V to the panel. When panel is taken

18、 off, panel 5V cut off. Q153,154ILL ControlILL lights when the base of Q153 is “H”. Q201Noise buffer Q350 Pre and NF Mute SW Drives the Pre and NF Mute sw (Q351,355) when the base is “L”. (not always Pre and NF) Q351Pre / NF Mute SWMutes the Pre Rear Lch or NF Lch when the base is “H”. Q352Pre / NF

19、Mute SWMutes the Pre Rear Rch or NF Rch when the base is “H”. Q354 Pre and NF Mute SW Drives the Pre and NF Mute sw (Q352,356) when the base is “L”. (not always Pre and NF) Q355Pre Mute SWMutes the Front Lch when the base is “H”. Q356Pre Mute SWMutes the Front Rch when the base is “H”. COMPONENTS DE

20、SCRIPTION SYSTEM MICROCOMPUTER : UPD703030GC044 (X34 : IC1) Pin No.Pin NameI/OApplication Truth Processing Operation Description value table 1PLL CLKI/OCLK output terminal to F/E 2Not usedO 3PANEL-DETIPanel DET terminalNo panel DET : L, Panel DET : H 4IC2 SDAI/ODATA input/output terminal with E-VOL

21、5IC2 SCLI/OCLK output terminal to E-VOL 6VDD- 7VSS- 8FLIP-DETIFlip DET terminalL : Panel DET, H : Panel flippable 9BEEPOBEEP output terminal 10REMOIRemote control input 11 R QUALIRDS decoder QUAL input terminal Not usedODestination other than E and E2 MICROCOMPUTERS TERMINAL DESCRIPTION 6 KDC-MP425/

22、MP6026 KDC-W6027/W6027Y Pin No.Pin NameI/OApplication Truth Processing Operation Description value table 12 R DATAIRDS decoder DATA input terminal Not usedODestination other than E and E2 13L CEOCE output terminal for LCD driver 14Not usedONon variable illumination switch destination 15Not usedONon

23、variable illumination switch destination 16DSII/O EJECT KEY ILL, GUIDE ILL,FLIP-DET “H” and PANEL-DET is “L” : “H” / “L” DSI control terminalFLIP-DET “H” and PANEL-DET is “H” : “L” 17DIM CONODimmer control terminal50ms interval : “H” / “L” 18TEST- 19ILL CONODuring FLIP DET ILL+B OFFDuring FLIP DET “

24、L” : H 20VOL AIVolume key inputWhen looking at VOL, also look at FLIPDET 21VOL BIVolume key inputWhen looking at VOL, also look at FLIPDET 22MOSWOCD mechanism MOTOR IC SWLoading, Eject, Brake : H 23LO/EJI/OCD mechanism LOADING, EJECT switchingSTOP, Brake : Hi-Z, Loading : L, Eject : H 24M STOPOSTOP

25、request to CD mechanism 25M RSTOReset output terminal to CD mechanismNormal : H, Reset : L 26MUTEI/OMUTE terminalHi-Z : Mute ON, L : Mute OFF 27LOE/LIM SWICD DOWN SW DET terminalH : Chucking 28M-MUTE LIMUTE request terminal from CD mechanismL : Mute request 29M-MUTE RIMUTE request terminal from CD m

26、echanismL : Mute request 30PANEL 5VI/OPanel 5V control terminalPanel DET : L, Detached, Momentary power down : H 31RESETINormal : H, Reset : L 32XT1I32kHz 33XT2I32kHz 34REGC-Connect 1F condenser to GND 35X2I20MHz 36X1I20MHz 37VSS- 38VDD- 39CLKOUT- 40IC2 TYPE1IE-VOL setting switching terminal 41IC2 T

27、YPE0IE-VOL setting switching terminal 4244TYPE2TYPE0IDestination switching terminale 45CD MECHA+BI/OPower supply control terminal for MP3ON : L, OFF : Hi-Z 46SW5VI/OControl terminal for SW5VON : L, OFF : Hi-Z 47,48PS2-0, PS2-1OControl terminal for power supply ICw 4951PS1-0PS1-2OControl terminal for

28、 power supply ICq 52B.U-DETIMomentary power down DET terminalBU DET : L, BU no DET (momentary power down) : H 53ACC-DETIACC DET terminalACC DET : L, ACC no DET : H MICROCOMPUTERS TERMINAL DESCRIPTION 7 KDC-MP425/MP6026 KDC-W6027/W6027Y Pin No.Pin NameI/OApplication Truth Processing Operation Descrip

29、tion value table 54DIMMERISmall DET terminalON : L, OFF : H 55BVDD- 56BVSS- 57Not usedONon Ext AMP CON destinationOutput “L” 58(SVR)OPOWER IC SVR control terminalMomentary power down : H 59P-MUTEOPOWER IC MUTE output terminalDuring POWER OFF : L, During ALL OFF : L, When TEL MUTE : L 60P-STBYOPOWER

30、IC STBY output terminalWhen POWER IC ON : H, OFF : L 61Not usedO 62PRE MUTE RORch PRE MUTE output When momentary power down : L, M-MUTE R : L (during CD), 2 zone : H fixed 63PRE MUTE LOLch PRE MUTE output When momentary power down : L, M-MUTE L : L (during CD), 2 zone : H fixed 64AFSOConstant switch

31、ing terminal at noise DETDuring FM seek and AF search : L, During reception : H 65 O-DATAI/OExternal display DATA terminal Not usedONon external display destinationNo OPEL DISP : L 66 O-CLKI/OExternal display CLK terminal Not usedONon external display destinationNo OPEL DISP : L 67 O-CEI/OExternal d

32、isplay CE terminal Not usedONon external display destinationNo OPEL DISP : L 68LX_RSTOReset output to external devices Normally : L, System RST return, then after 400msec or more : H then L 69LX_CONOControl output to external devicesON : H, OFF : L 70AVCONTOAD reference voltage control outputWhile i

33、n operation : H 71AVDD- 72AVSS- 73AVREF-AD reference voltage control inputConnect to 70 pin 74PHONEIPHONE DET terminal TEL MUTE : 1V or lower, NAVI MUTE : 2.5V or higher 75TYPE3IDestination switching terminal 7681Not usedI 82S-METERIS-meter DET terminal 83NOISEIFM noise DET terminal 84IFC-OUTIF/E IF

34、C OUT input terminal 85LX_MUTEIMUTE request from external devicesH : MUTE ON, L : MUTE OFF 86LX_REQ_MORequest output to external devicesRequest DET : L 87 R-CLKIRDS decoder CLK input terminal Not usedONon RDS destinationOutput L fixed 88LX_REQ_SIRequest input from external devicesRequest DET : L 89K

35、EY-REQICommunication request from LCD driverL : KEY input MICROCOMPUTERS TERMINAL DESCRIPTION 8 KDC-MP425/MP6026 KDC-W6027/W6027Y Pin No.Pin NameI/OApplication Truth Processing Operation Description value table 90LO.S SWILoading start SW DET terminalLoading start : L 9112EJE SWI 12cm DISC EJECT posi

36、tion DET SW terminal 12cm DISC : L 12 or 8cm DET 92EJECTIEJECT DET terminalL : KEY input 93Not usedOOutput L fixed 94LX_DATA_SIDATA input terminal from external devices 95LX_DATA_MODATA output terminal for external devicesLast retention 96LX_CLKI/OCLK input/output terminal with external devices 97L

37、DATALIData input from LCD driver 98L DATASODATA output terminal to LCD driver 99L CLKOCLK output terminal to LCD driver 100PLL DATAI/ODATA input/output terminal with F/E Truth value table q PS1-0PS1-1PS1-2AUDIOP-CONP-ANT LLLOFFOFFOFF H (L)L (H)LONOFFOFF HHLONONOFF HHHONONON w PS2-0PS2-1ILLUMIFM+BAM+

38、B LLOFFOFFOFF H (L)L (H)ONONOFF HHONOFFON e TYPE MODELDESTINATION 012 KDC-X579KLLL KDC-MP425KHLL KDC-MPV525KLHL KDC-MPV5025KLLL KDC-WV6027EHLH KDC-W6027ELLH KDC-W6027YELLH KDC-MPV7026MHHL KDC-MP6026MLHH MICROCOMPUTERS TERMINAL DESCRIPTION 9 KDC-MP425/MP6026 KDC-W6027/W6027Y 1. How to enter the test

39、mode While holding the Preset 1 and Preset 3 keys, reset the unit. 2. How to exit from the test mode Reset the unit, momentary power down, ACC OFF, power OFF, and Panel detached. (Note) The test mode cannot terminated by Panel is fall down. 3. Initial status in the test mode Sources: All OFF. Displa

40、y: All segments are lit. Volume: -10 dB (displayed as 30) Loudness: OFF CRSC: OFF regardless of the presence of switching function. SYSTEM Q: Flat. BEEP: When pressing any keys, the buzzer generates a beep at any time. DISPLAY TYPE: TYPE A 4. RDS automatic measurement An addition to disposal of subs

41、titute for visual check PS display as usual production lines. P-CON terminal is OFF by force, when received the PS data and in case of corrobaration PS display is “RDS_TEST”. (“_” is mean blank.) This disposal is test mode only. P-CON is switching the source or return with power onoff. 5. Special di

42、splay in Tuner mode When any of the following messages is displayed in Tuner mode, the front end may be abnormal. “TNE 2P NG”: The EEPROM is set to the default (unstable values) because the F/E was shipped without passing through the adjustment process, etc. “TNCON NG”: Communication with the F/E is

43、 not possible. 6. Forced switching of K3I Each press of the Preset 6 key in Tuner mode should switch K3I from AUTO Forced Wide Forced Middle Forced Narrow AUTO. The initial status is AUTO and the dis- play shows these modes as follows. AUTO: FMA Forced Wide: FMW Forced Middle : FMM Forced Narrow: FM

44、N TEST MODE 7. CD Receiver Test Mode Specification When resetting to start, forced ejection of CD is prohib- ited. When a CD is in place, the CD is not recognized when reset. When this key is pressed, the mechanism jumps to the following track. No9 No15 No10 No11 No12 No13 No22 No14 No9 (Return to t

45、he first track.) When this key is pressed, the track goes down by one from the currently played track. When a CD being played, by pressing 1 key intermittently, the mechanism can be made to jump to Track No. 28. 8. Audio-related specifications A short press of the Q key initiates the audio adjustmen

46、t mode. Pressing the key on the remote initiates the audio adjustment mode. Fader is selected to the initial item. Continuous holding of a remote control key is inhibited. Bass, Middle and Treble are adjusted in 3 steps of -8/0/+8 with the Track Up/Down keys. Balance is adjusted in 3 steps of L15/0/

47、R15 with the Track Up/Down keys. Fader is adjusted in 3 steps of F15/0/R15 with the Track Up/Down keys. Volume Offset is adjusted in 2 steps of -8/0 with theTrack Up/Down keys. 9. Menu-related specifications A short press of the MENU key initiates the Menu mode. Except, tape source is usually press

48、and hold 1 second to enter the menu mode and short press initiates turn over. Pressing the DNPP/SBF key on the remote initiates the Menu mode. Continuous holding of a remote control key is inhibited. Contrast is adjusted in 3 steps of 0/5/10 (5x7dot), 0/4/7 (14seg) with the Track Up/Down keys. 10. B

49、ackup current measurement When the unit is reset while ACC is OFF (i.e. by turning Back-Up ON), the MUTE terminal goes OFF in 2 seconds in place of 15 second. 10 KDC-MP425/MP6026 KDC-W6027/W6027Y 11. Special display when the display is All ON Pressing the Preset keys while the power is All OFF dis- plays the following information. 14seg 8 digits 1keyVersion display (8 digits, Month/Day/Hour/Minute) (Display) xxxxxxxx 2key 3keyShort press: View power ON time. (The All OFF period is not counted.) Long press/hold: Cl