Kenwood-KDC-2025-Service-Manual电路原理图.pdf

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1、 2003-12 PRINTED IN JAPANB53-0112-00 (N)764CD RECEIVERKDC-225/MRKDC-2025SERVICE MANUAL* Escutcheon(B07-3097-02)(B07-3098-02)Plastic cabinet assy(A02-1486-13)Mounting hardware assy(J21-9716-03)Screw(N84-4016-46)Lever(D10-4589-04) x 2Screw set(N99-1719-05)CD mechanism extension cord (24PIN) : W05-0934

2、-00DC cord(E30-6322-05)(E30-6323-05)AUTOCLK ADJSCANAUDRDM REPOFFLOUDCRSCFront glass KDC-2025 (B10-4548-01)Panel assy KDC-2025 (A64-3305-02)AMEM.RDM+-AUTODISP ADJSCANAUDRDM REPOFFLOUDCRSCFront glass KDC-225MR (B10-4559-01)Panel assy KDC-225MR (A64-3361-02)AMEM.RDM+-AUTOSCANAUDRDM REPOFFLOUDC.S. Front

3、 glass KDC-225 (B10-4465-01)Panel assy KDC-225 (A64-3172-02)AMETDF PANEL INFORMATIONMODEL PARTS NO. PANEL NAMEKDC-225 Y33-1940-60 TDF-42DKDC-225MR Y33-1940-62 TDF-42DMRKDC-2025 Y33-1940-61 TDF-42DB* Remote controller assy(A70-2040-05) : RC-505* Not supplied * Depends on model. Refer to the parts lis

4、t.CLK ADJM.RDM+SCRL-2KDC-225/225MR/2025BLOCK DIAGRAM1200mVDXM-6060DXM-6560DXM-6540 : 810mV: 1200mV: 1200mV1Vpp75Ter m.SWITCH UNIT (X16- )TUNERCD/VCDCHBUFFERRDSDECODERBUFFEREEPROMREMOCONRESET SWWITHLCD DRIVERKEY MATRIXLCDDSISYSTEMMPXE-VOL&ACC DETTEL MUTEB.U DETPRE MUTEDRIVERMUTEPOWERICTHERMALPROTECTA

5、CCTEL MUTEBACK UP(REAR)PRE OUTSP OUTSURGE DETSERVOSERVO+B SW 14VWIRED REMOSUPPLYICPOWER ANT CONP CONRESETSW 5VPANEL 5VSW5VILL SWILLUMIIC7IC2IC1IC4IC3IC8IC1IC2SWANALOGAUX INAUDIOPARK SW PARK SWMICROPROCESSORMECHA+B MECHA +BICVIDEO OUTIC9IC6to VIDEO OUTTUN SMETERAUDIO OUTTUN IFC OUTTUN SCLTUN SDASW5VA

6、M+BA8VCD DISC8 SWCD DISC12 SWCD LOS SWCD SDACD SCLCD LOE LIM SWCD MUTE LCD LOEJCD MSTOPCD MRSTSERVO+BA8VBU5VMECHA+BLX DATA SLX MUTELX RSTLX REQ MLX REQ SLX CLKLX COMLX DATA MBACK UPRDS QUALS-METERRDS DATARDS CLKFMAMMPLEVELCDQUALAFSCHSW5VSW5VBU5VDSI L CLKL DATASL CE L DATALREMOMUTEPWIC MUTELINE MUTEA

7、CC DEB.U DETPWIC BEEPRSTBU5VA8VSW5VAM+BILLUMIA8VBU5VBU5VMODEFMAMMP3E-TYPE1372mV855mV3600mVK-TYPE1800mV600mV3600mVPWIC STBYBU5VTDF DETSW5VAUD SCLAUD SDAA8VPON 5PARK SWMUTE PREPS2-1 PS1-0PS2-0 PS1-2 PS1-1PON CDA8VCD MOTORCD MUTE RVIDEO OUTAUX SWRDS AFSRDS NOISESW5VSW5VL RST KEY REQBU5VELECTRIC UNIT (X

8、25-)3KDC-225/225MR/2025 SWITCH UNIT (X16-2640-11/12)Ref. No. Application / Function Operation / Condition / CompatibilityIC1 LCD driver Drive for LCD unitIC2 Remote control IC Receiving for the remote control unitQ1 KEY scan detector key scan start at base gose “L”. ELECTRIC UNIT (X25-9980-11/12/21)

9、Ref. No. Application / Function Operation / Condition / CompatibilityIC1 System microcomputer Control for TUNER unit, CD mechanism, volume & tone, LCD driver and external CD changer unitIC2 Electronic volume & N.C.MPX Control for source selector, volume & tone, and FM multiplex detector.Power supply

10、 for the units (Bu5V, Audio8V, FM+B, AM+B, P-con and ANT-con)IC3 Power supply ICIC4 Audio power amp IC Amplifier for audio signal to derive for 4channel speakers (50W maximum for each channel)IC6 Muting control IC Control for timing for muteIC8 Reset IC When detection voltage goes below 3.5V or less

11、 Reset IC output change to “L” signalQ1 Serge detectionWhen backup voltage become more than 24V output is “L” (momentary power down) /When backup voltage become less than 24V output is “H”Q2 Backup detectionWhen BU voltage supplied output is “L” /When BU voltage not supplied or momentary power down

12、is detected output is “H”Q3 ACC detection When ACC voltage supplied output is “L”Q4 SW 5V When base voltage is “L” Q4 is ONQ21,24 AVR Servo regulatorQ22 SW Servo SWQ151 DSI driverWhen base voltage level is “L” DSI LED is light up / When base voltage level is “H” DSI LEDturns off / When panel assy is

13、 pull off, cut off the supply to panel 5V AVR.Q201 Buffer amp Noise buffer ampQ252 For surge measure of audio power IC When base voltage to “L”, for control to power IC function (STAND BY)Q350 Pre & NF mute SW When base voltage to “L”, drive to pre & NF mute SW (Q351)Q351 Pre mute SW When base volta

14、ge to “H”, muting to the pre Lch or NF Lch lineQ352 Pre mute SW When base voltage to “H”, muting to the pre Rch or NF Rch lineQ401 DSI illumination SW When base voltage to “H”, DSI illumination is light up.COMPONENTS DESCRIPTIONSW1 OUT1.53.0V Audio ON3.55.0V Audio P-con ON7.0V Audio P-con, P-ant ONS

15、W2 OUT2.03.0V Illumination, FM ON4.0V Illumination, AM ON4KDC-225/225MR/2025 CD PLAYER UNIT (X32-5400-00)Ref. No. Application / Function Operation / Condition / CompatibilityGeneration of RF signal based on the signals from the APC circuit and pickup, and generationIC1 RF amplifier adapted for CD-RW

16、 of servo error (focusing error and tracking error) signals. Detection of dropout, anti-shock,track crossing and off-track conditions, included gain control function during CD-RW.Focusing, tracking, sled and spindle servo processing. Automatic adjustment (focusing,IC2 CD signal processor built-in MI

17、-COM tracking, gain, offset and balance) operations. Digital signal processing (DSP, PLL, sub-codes,CIRC error correction, audio data Interpol ration) operations, and Microcomputer function.IC3 4CH BTL driver Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and eject o

18、peration.IC4 Low pass filter 2nd low pass filter for audio signalsQ1 APC LD power controlQ2 D.5V SW When P ON signal gose “L”, Q2 is ONQ3 Q4 SW When P ON signal gose “L” (SW+5V AVR is ON), Q3 is ONQ4 A.8V SW When P ON signal gose “L” (Q3 is ON), Q4 is ONQ5 Current driver Current driverQ6 Current dri

19、ver Current driverD1 Protection diode Laser diode protectionD2 Zener diode DAC AVR/LPF reference voltage (A.5V)D3 Current driver Current driverCOMPONENTS DESCRIPTION5KDC-225/225MR/2025MICROCOMPUTERS TERMINAL DESCRIPTION SYSTEM MICROPROCESSOR : 784225GC233A (X25 : IC1)Pin No. Pin Name I/O Description

20、 / Processing Operation1 TUN SMETER I S meter detection input terminal2 RDS NOISE I FM noise detection input terminal3 LINE MUTE I Phone Muting signal input terminal (More than 2.5V : NAVI mute, Less than 1.0V : TEL mute)4AVSS - GND5L RST O Reset signal output (for LCD driver) H : Light on display,

21、key scan, L : Light out on display, key reset6L CE O CE output for LCD driver IC7AVREF1 - BU5.0V8L DATAL I DATA input terminal from LCD derive IC9L DATAS O DATA output terminal to LCD driver IC10 L CLK O CLK output terminal to LCD driver IC11 TDF DET I Panel assy detect terminal H : Panel assy come

22、off12 AUX ON O Select for AUX input signal H : AUX, L : Other13 RDS QUAL I RDS decoder QUAL signal input terminal14 RDS DATA I RDS decoder Data signal input terminal15 PWIC BEEP O Beep audio signal output terminal16 LX DATA S I DATA signal input from EXT. unit17 LX DATA M O DATA signal output to EXT

23、. unit18 LX CLK I/O CLK signal input/output to EXT. unit19 TUN SCL O I2C CLK signal output terminal (for front-end)20 TUN SDA I/O I2C DATA signal input/output terminal (for front-end)21 TUN IFC OUT I IFC signal input terminal H : Station detect, L : No detect22 RDS AFS O Time constant select termina

24、l (for noise detect) H : Receiving, L : FM seek, AF search23 CD SDA I/O I2C DATA output terminal (for CD mechanism, electric VR)24 AUD SDA O CLK output terminal (for CD mechanism, electric VR)25 NC - NC26 LX RST O Reset signal output to EXT. unit27 LX CON O Control signal output to EXT. unit H : ON

25、L : OFF28 LX MUTE I Request signal input terminal from EXT. unit L : Mute ON29 LX REQ M O DATA signal output to EXT. unit30 PWIC SVR O SVR control for Audio power IC31 PWIC STBY O STBY control for Audio power IC H : Power IC ON32 PWIC MUTE O Muting control for Audio power IC33 VSS1 - GND34 ACC DET I

26、 ACC detection input terminal L : ACC detect35 RESET2 O Reset output terminal L : Active36 MUTE O Muting signal output terminal37 BU DET I BU detect input terminal L : BU detect38 PARK SW I Packing condition detect terminal H : OFF, L : ON (PARKING)39 PS2 1 O Power supply IC control terminal6KDC-225

27、/225MR/2025MICROCOMPUTERS TERMINAL DESCRIPTIONPin No. Pin Name I/O Description / Processing Operation40 PS2 0 O Power supply IC control terminal41 PS1 0 O Power supply IC control terminal42 PS1 1 O Power supply IC control terminal43 PS1 2 O Power supply IC control terminal44 PON 5 O SW5V/SW14V contr

28、ol output terminal Hi-Z : OFF, L : ON45 NC - NC46 PON CD O MP3 power supply control terminal47 CD DISC12 SW I 12cm CD disc eject SW detection input terminal L : 12cm disc48 CD MUTE R I Request for muting signal from CD mechanism L : Mute request49 NC - NC50 CE MRST O Reset signal output to CD mechan

29、ism L : Active51 CD DISC8 SW I 8cm CD disc eject SW detection input terminal (Not used)52 CD LOS SW I Loading start SW detection input terminal L : Loading start53 CD MUTE L I Request for muting signal from CD mechanism L : Mute request54 NC - NC55 CD MSTOP O Request signal (Mechanism is STOP) outpu

30、t to CD mechanism L : Active56 CD LOE LIM SW I Down SW detection from CD mechanism57 CD LOEJ I/O CD mechanism loading / eject control terminal H : Eject, L : Loading58 CD MOTOR O CD mechanism motor loading control terminal H : Loading, Eject, Brake, L : Play59 DSI O Disc guide illumination control t

31、erminal H : DSI ON60 RESET I Reset input terminal L : Active61 NC - NC62 KEY REQ I Request for communication to slave unit L : Key input mode63 RDS CLK I RDS decoder CLK input terminal64 LX REQ S I DATA signal input from EXT. unit65 REMO I Remote control signal input terminal66 NC - NC67 VSS0 - GND6

32、8 VDD1 - BU5.0V69 X2 - Main clock input terminal (10MHz)70 X1 - Main clock input terminal (10MHz)71 TEST - GND72 XT2 - Sub clock input terminal (32.768kHz)73 XT1 - Sub clock input terminal (32.768kHz)74 VDD0 - BU5.0V75 AVDD - BU5.0V7678 TYPE02 I Destination input terminal DXM6540 (SEL0 : Lo, SEL1 :

33、Lo)79,80 TUN TYPE0,1 I Electric volume condition setting terminal7KDC-225/225MR/2025TEST MODE1. How to enter test modeWhile holding the FM key and PRESET 6 keys, reset theunit.All display segments light up when the test mode is en-tered.2. How to exit from test modeReset the unit.Turning ACC off, po

34、wer off, momentary power down or paneldetaching does not terminate the test mode.3. Initial status in the test mode Sources : ALL OFF (STAND BY) Display : All segments were lit.Volume : -10dB (displayed as “30”) Loudness : OFF CRSC : OFF regardless of the presence of switching func-tion.Aux : ON4. T

35、UNER function Forced switching of K3IEach press of the Preset 6 key in Tuner mode should switchK3I from AUTOForced WideForced MiddleForcedNarrowAUTO. The initial status is AUTO and the displayshows these modes as follows.AUTO : AForced Wide : MForced Middle : MForced Narrow : N RDS checkPCON is powe

36、r off when RDS data (“RDS test”) receivedfor TUNER mode.5. CD function Test mode specifications of the CD receiverEach press of the Track Up key jumps to the following tracknumbers :No. 9No. 15No. 10No. 11No. 12No. 13No. 22No. 14No. 9 (The cycle restarts from here.) Each press of the Track Down key

37、jumps to the previoustrack number to the track being played.When the number of total tracks of disc is nine or less, unitplayback from a track 1. When the media to CD-DA, unit playback from track No. 28by key operation of preset 1 key.6. AUDIO function Audio-related specificationsA short press of th

38、e Q key initiates the audio adjustmentmode. Pressing the OPEN/CLOSE key on the remote controllerinitiates the audio adjustment mode. 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 (default is 0). Bala

39、nce is adjusted in 3 steps of Left L15 / 0 / R15 Maxwith the Track Up/down keys (default is 0). Loudness : OFF7. MENU function Menu-related specificationsA short press of the PLAY/PAUSE key initiates the Menumode. Pressing the DNPP key on the remote initiates the Menumode. Continuous holding of a re

40、mote control key is inhibited.8. OTHER Special display when the display is all onPressing the Preset keys while the power is ALL OFF dis-plays the following information.PRESET 1 Version display (Month/Day/Hour/Minute)PRESET 2 ALL segment light up for FL displayPRESET 3 Short press : Display CD opera

41、tion time.Long press/hold : Clear CD operation timePRESET 5 Short press : Display CD ejection count.Long press/hold : Clear CD ejection count.FM ROM correction version.If not mounting ROM correction chip set displayshows ROM No_8KDC-225/225MR/2025A B C D E1234567PC BOARD (FOIL SIDE VIEW)W18R431R410R

42、407R425W35C406R64R62W37R59R60R42R41W38R44R43R65R51R66R56W36R61R54 R58R57R52C33R106R418R315W29R162R160C407C408R420R411R413R28W30R314C410R53R55R12R13R25 R26R520C32C111R154R208R152R153R27W27R312R207R210R432R209R421R422R415R419R416R417W25R161R412W39C19R1C45W31W34W32W40W33R254C5R5W41R24C521R521R430W28R52

43、3R272R32C3 R6R4R522C6R252R33R7 R11R10R255R271R256R273R251R2 R3C4C3125 124 2R257 R253TH1W24W22W19W23R313W201258131420214041606180 1814174312CCEEBBEBEBEBEBEBEBEBBBEEEBEECCEBDATACLK10.0MHz32.768kHzR63W241W240W237W230W238W235R21C21W223W228W220W2241215123224142L10C43C30L12L2/W239W233C409W232L11C26C1C20C4

44、1C42L116198C25C22C23C24C27C28C29C255C256C258R8R22R23X1R206C201C202C251C252C253C254C257R9R31R180R181R182R303X2W187W184 W181W227W180W182W191W185W195W174W178W201W171W168 W164W207W208W229W216W221W177W206W210W202W203W140W166W173W152W155W135W137W130W133W138W141W145W136W128W131W236W234W231W200W196W157W156W

45、150W148W176W149W146W147W143W175W183W192W197W193W225W179W165W218W222W214W198 W194W212W209W204W215W226W213W217W219W211W205W134W189W190W127W162W129W132W188W163W153W186W169W151W142W144W139W158W159W160W161W167W170W172D41Q401D402D524Q41D201D202Q4D525QD25Q23D26Q22D22Q1Q521D526Q2D521Q252Q3D253D255D257D258 D

46、251D256J5CN5Q24CN2Q21D1D3D21D23D31D522J1D156P1D2D4D5D269 D270D271D523D24D254D252IC8IC1IC6IC11IC9IC3IC4ELECTRIC UNIT X25-9980-11/12/21 (J76-0016-02)9KDC-225/225MR/2025JIHGF1234567Refer to the schematic diagramfor the values of resistors and ca-pacitors.C301W14W18W39C204 C203 C205W15C206W42R2115761091

47、3111284321W19C210W16W17W10R501W8C506C507R508C113 C112W3W11C213R201C212R202R203R103 R105W5W6R205W13R204R111W1W2R114R112R113C114C116C108C106R104R102R507W12C105W9C302C503C502C104R101R502R503611132412C356R355R351R356R3521816918169141312141519128 155 814BEBEBEBEBEBEBE4.332MHzW241C211C115L7R172L6L8C117C20

48、9C251254C303C351C352C504L3R171 R173R174 R175 R176R180R182R183R301 R302R303 R304R305R306R307 R308R309R310 R311R357R358R374X3W11552L9R505R506R504W106W112W101W119 W117W100W110W118W114 W113 W111W105W104W103W107W108W116W130W133W121W120W109W123W126W128W131W134W122W124W127W129W132Q151D401D205D203Q501Q201Q1

49、01Q350Q351Q352J3J2J5WH1CN3WH2D159D301D307D308D309D310D311D151D157D158D162CN4CN6CN1D501D502D503J4IC11IC2IC10IC7X25-9980-11/12/21Ref. No. AddressIC1 6DIC2 5FIC3 4BIC4 2EIC6 5DIC8 6CQ1 3CQ2 3DQ3 3DQ4 5DQ21 2BQ22 3BQ24 3AQ151 6FQ201 5GQ252 3DQ350 3GQ351 3GQ352 3GQ401 7B10KDC-225/225MR/2025K L M N O1234567PC BOARD (COMPONENT SIDE VIEW)X32-5400-00Ref. No. AddressIC2 3LIC4 5LQ6 2M Refer to the schematic diagram for the values of resistors and capacitors.R82R88R86R50R84R81C61R83R87R85C36C10R9C15R10 C14C44R40 C