Kenwood-KDC-2025-Service-Manual 电路图 维修手册.pdf

《Kenwood-KDC-2025-Service-Manual 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Kenwood-KDC-2025-Service-Manual 电路图 维修手册.pdf（28页珍藏版）》请在收音机爱好者资料库上搜索。

1、 2003-12 PRINTED IN JAPAN B53-0112-00 (N) 764 CD RECEIVER KDC-225/MR KDC-2025 SERVICE 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 2 Screw set (N99-1719-05) CD mechanism extension cor

2、d (24PIN) : W05-0934-00 DC cord (E30-6322-05) (E30-6323-05) AUTO CLKADJSCAN AUD RDMREP OFF LOUD CRSC Front glass KDC-2025 (B10-4548-01) Panel assy KDC-2025 (A64-3305-02) AME M.RDM + - AUTO DISPADJSCAN AUD RDMREP OFF LOUD CRSC Front glass KDC-225MR (B10-4559-01) Panel assy KDC-225MR (A64-3361-02) AME

3、 M.RDM + - AUTO SCAN AUD RDMREP OFF LOUD C.S. Front glass KDC-225 (B10-4465-01) Panel assy KDC-225 (A64-3172-02) AME TDF PANEL INFORMATION MODEL PARTS NO. PANEL NAME KDC-225Y33-1940-60 TDF-42D KDC-225MRY33-1940-62 TDF-42DMR KDC-2025Y33-1940-61 TDF-42DB * Remote controller assy (A70-2040-05) : RC-505

4、 * Not supplied * Depends on model. Refer to the parts list. CLKADJM.RDM + SCRL- RadioFans.CN 收音机爱 好者资料库 2 KDC-225/225MR/2025 BLOCK DIAGRAM 1200mV DXM-6060 DXM-6560 DXM-6540: 810mV : 1200mV : 1200mV 1Vpp75 Term. SWITCH UNIT (X16- ) TUNER CD/VCD CH BUFFER RDS DECODER BUFFER EEPROM REMOCON RESET SWWIT

5、H LCD DRIVER KEY MATRIX LCD DSI SYSTEM MPX E-VOL & ACC DET TEL MUTE B.U DET PRE MUTE DRIVER MUTE POWER IC THERMAL PROTECT ACC TEL MUTE BACK UP (REAR) PRE OUT SP OUT SURGE DET SERVOSERVO+BSW 14V WIRED REMO SUPPLY IC POWER ANT CON P CON RESET SW 5V PANEL 5V SW5V ILL SW ILLUMI IC7 IC2 IC1 IC4 IC3 IC8 I

6、C1 IC2 SW ANALOG AUX IN AUDIO PARK SWPARK SW MICROPROCESSOR MECHA+BMECHA +B IC VIDEO OUT IC9 IC6 to VIDEO OUT TUN SMETER AUDIO OUT TUN IFC OUT TUN SCL TUN SDA SW5V AM+B A8V CD DISC8 SW CD DISC12 SW CD LOS SW CD SDA CD SCL CD LOE LIM SW CD MUTE L CD LOEJ CD MSTOP CD MRST SERVO+B A8V BU5V MECHA+B LX D

7、ATA S LX MUTE LX RST LX REQ M LX REQ S LX CLK LX COM LX DATA M BACK UP RDS QUAL S-METER RDS DATA RDS CLK FM AM MP LEVEL CD QUAL AFS CH SW5V SW5V BU5V DSI L CLK L DATAS L CE L DATAL REMO MUTE PWIC MUTE LINE MUTE ACC DE B.U DET PWIC BEEP RST BU5V A8V SW5V AM+B ILLUMI A8V BU5V BU5V MODE FM AM MP3 E-TYP

8、E 1372mV 855mV 3600mV K-TYPE 1800mV 600mV 3600mV PWIC STBY BU5V TDF DET SW5V AUD SCL AUD SDA A8V PON 5 PARK SW MUTE PRE PS2-1 PS1-0 PS2-0 PS1-2 PS1-1 PON CD A8V CD MOTOR CD MUTE R VIDEO OUT AUX SW RDS AFS RDS NOISE SW5V SW5V L RST KEY REQ BU5V ELECTRIC UNIT (X25-) RadioFans.CN 收音机爱 好者资料库 3 KDC-225/2

9、25MR/2025 SWITCH UNIT (X16-2640-11/12) Ref. No.Application / FunctionOperation / Condition / Compatibility IC1LCD driverDrive for LCD unit IC2Remote control ICReceiving for the remote control unit Q1KEY scan detectorkey scan start at base gose “L”. ELECTRIC UNIT (X25-9980-11/12/21) Ref. No.Applicati

10、on / FunctionOperation / Condition / Compatibility IC1System microcomputerControl for TUNER unit, CD mechanism, volume & tone, LCD driver and external CD changer unit IC2Electronic volume & N.C.MPXControl for source selector, volume & tone, and FM multiplex detector. Power supply for the units (Bu5V

11、, Audio8V, FM+B, AM+B, P-con and ANT-con) IC3Power supply IC IC4Audio power amp ICAmplifier for audio signal to derive for 4channel speakers (50W maximum for each channel) IC6Muting control ICControl for timing for mute IC8Reset ICWhen detection voltage goes below 3.5V or less Reset IC output change

12、 to “L” signal Q1Serge detection When backup voltage become more than 24V output is “L” (momentary power down) / When backup voltage become less than 24V output is “H” Q2Backup detection When BU voltage supplied output is “L” / When BU voltage not supplied or momentary power down is detected output

13、is “H” Q3ACC detectionWhen ACC voltage supplied output is “L” Q4SW 5VWhen base voltage is “L” Q4 is ON Q21,24AVRServo regulator Q22SWServo SW Q151DSI driver When base voltage level is “L” DSI LED is light up / When base voltage level is “H” DSI LED turns off / When panel assy is pull off, cut off th

14、e supply to panel 5V AVR. Q201Buffer ampNoise buffer amp Q252For surge measure of audio power ICWhen base voltage to “L”, for control to power IC function (STAND BY) Q350Pre & NF mute SWWhen base voltage to “L”, drive to pre & NF mute SW (Q351) Q351Pre mute SWWhen base voltage to “H”, muting to the

15、pre Lch or NF Lch line Q352Pre mute SWWhen base voltage to “H”, muting to the pre Rch or NF Rch line Q401DSI illumination SWWhen base voltage to “H”, DSI illumination is light up. COMPONENTS DESCRIPTION SW1OUT 1.53.0VAudio ON 3.55.0VAudio P-con ON 7.0VAudio P-con, P-ant ON SW2OUT 2.03.0VIllumination

16、, FM ON 4.0VIllumination, AM ON RadioFans.CN 收音机爱 好者资料库 4 KDC-225/225MR/2025 CD PLAYER UNIT (X32-5400-00) Ref. No.Application / FunctionOperation / Condition / Compatibility Generation of RF signal based on the signals from the APC circuit and pickup, and generation IC1RF amplifier adapted for CD-RW

17、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, IC2CD signal processor built-in M

18、I-COMtracking, gain, offset and balance) operations. Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data Interpol ration) operations, and Microcomputer function. IC34CH BTL driverFocusing coil, tracking coil, spindle motor and sled motor driver, disc loading and eject o

19、peration. IC4Low pass filter2nd low pass filter for audio signals Q1APCLD power control Q2D.5V SWWhen P ON signal gose “L”, Q2 is ON Q3Q4 SWWhen P ON signal gose “L” (SW+5V AVR is ON), Q3 is ON Q4A.8V SWWhen P ON signal gose “L” (Q3 is ON), Q4 is ON Q5Current driverCurrent driver Q6Current driverCur

20、rent driver D1Protection diodeLaser diode protection D2Zener diodeDAC AVR/LPF reference voltage (A.5V) D3Current driverCurrent driver COMPONENTS DESCRIPTION 5 KDC-225/225MR/2025 MICROCOMPUTERS TERMINAL DESCRIPTION SYSTEM MICROPROCESSOR : 784225GC233A (X25 : IC1) Pin No.Pin NameI/ODescription / Proce

21、ssing Operation 1TUN SMETERIS meter detection input terminal 2RDS NOISEIFM noise detection input terminal 3LINE MUTEIPhone Muting signal input terminal (More than 2.5V : NAVI mute, Less than 1.0V : TEL mute) 4AVSS-GND 5L RSTOReset signal output (for LCD driver)H : Light on display, key scan, L : Lig

22、ht out on display, key reset 6L CEOCE output for LCD driver IC 7AVREF1-BU5.0V 8L DATALIDATA input terminal from LCD derive IC 9L DATASODATA output terminal to LCD driver IC 10L CLKOCLK output terminal to LCD driver IC 11TDF DETIPanel assy detect terminalH : Panel assy come off 12AUX ONOSelect for AU

23、X input signalH : AUX, L : Other 13RDS QUALIRDS decoder QUAL signal input terminal 14RDS DATAIRDS decoder Data signal input terminal 15PWIC BEEPOBeep audio signal output terminal 16LX DATA SIDATA signal input from EXT. unit 17LX DATA MODATA signal output to EXT. unit 18LX CLKI/OCLK signal input/outp

24、ut to EXT. unit 19TUN SCLOI2C CLK signal output terminal (for front-end) 20TUN SDAI/OI2C DATA signal input/output terminal (for front-end) 21TUN IFC OUTIIFC signal input terminalH : Station detect, L : No detect 22RDS AFSOTime constant select terminal (for noise detect)H : Receiving, L : FM seek, AF

25、 search 23CD SDAI/OI2C DATA output terminal (for CD mechanism, electric VR) 24AUD SDAOCLK output terminal (for CD mechanism, electric VR) 25NC-NC 26LX RSTOReset signal output to EXT. unit 27LX CONOControl signal output to EXT. unit H : ON L : OFF 28LX MUTEIRequest signal input terminal from EXT. uni

26、tL : Mute ON 29LX REQ MODATA signal output to EXT. unit 30PWIC SVROSVR control for Audio power IC 31PWIC STBYOSTBY control for Audio power ICH : Power IC ON 32PWIC MUTEOMuting control for Audio power IC 33VSS1-GND 34ACC DETIACC detection input terminalL : ACC detect 35RESET2OReset output terminal L

27、: Active 36MUTEOMuting signal output terminal 37BU DETIBU detect input terminalL : BU detect 38PARK SWIPacking condition detect terminalH : OFF, L : ON (PARKING) 39PS2 1OPower supply IC control terminal 6 KDC-225/225MR/2025 MICROCOMPUTERS TERMINAL DESCRIPTION Pin No.Pin NameI/ODescription / Processi

28、ng Operation 40PS2 0OPower supply IC control terminal 41PS1 0OPower supply IC control terminal 42PS1 1OPower supply IC control terminal 43PS1 2OPower supply IC control terminal 44PON 5OSW5V/SW14V control output terminalHi-Z : OFF, L : ON 45NC-NC 46PON CDOMP3 power supply control terminal 47CD DISC12

29、 SWI12cm CD disc eject SW detection input terminalL : 12cm disc 48CD MUTE RIRequest for muting signal from CD mechanismL : Mute request 49NC-NC 50CE MRSTOReset signal output to CD mechanismL : Active 51CD DISC8 SWI8cm CD disc eject SW detection input terminal (Not used) 52CD LOS SWILoading start SW

30、detection input terminalL : Loading start 53CD MUTE LIRequest for muting signal from CD mechanismL : Mute request 54NC-NC 55CD MSTOPORequest signal (Mechanism is STOP) output to CD mechanismL : Active 56CD LOE LIM SWIDown SW detection from CD mechanism 57CD LOEJI/OCD mechanism loading / eject contro

31、l terminalH : Eject, L : Loading 58CD MOTOROCD mechanism motor loading control terminalH : Loading, Eject, Brake, L : Play 59DSIODisc guide illumination control terminalH : DSI ON 60RESETIReset input terminalL : Active 61NC-NC 62KEY REQIRequest for communication to slave unitL : Key input mode 63RDS

32、 CLKIRDS decoder CLK input terminal 64LX REQ SIDATA signal input from EXT. unit 65REMOIRemote control signal input terminal 66NC-NC 67VSS0-GND 68VDD1-BU5.0V 69X2-Main clock input terminal (10MHz) 70X1-Main clock input terminal (10MHz) 71TEST-GND 72XT2-Sub clock input terminal (32.768kHz) 73XT1-Sub c

33、lock input terminal (32.768kHz) 74VDD0-BU5.0V 75AVDD-BU5.0V 7678TYPE02IDestination input terminalDXM6540 (SEL0 : Lo, SEL1 : Lo) 79,80TUN TYPE0,1IElectric volume condition setting terminal 7 KDC-225/225MR/2025 TEST MODE 1. How to enter test mode While holding the FM key and PRESET 6 keys, reset the u

34、nit. All display segments light up when the test mode is en- tered. 2. How to exit from test mode Reset the unit. Turning ACC off, power off, momentary power down or panel detaching does not terminate the test mode. 3. Initial status in the test mode Sources : ALL OFF (STAND BY) Display : All segmen

35、ts were lit. Volume : -10dB (displayed as “30”) Loudness : OFF CRSC : OFF regardless of the presence of switching func- tion. Aux : ON 4. TUNER function Forced switching of K3I Each press of the Preset 6 key in Tuner mode should switch K3I from AUTOForced WideForced MiddleForced NarrowAUTO. The init

36、ial status is AUTO and the display shows these modes as follows. AUTO : A Forced Wide : M Forced Middle : M Forced Narrow : N RDS check PCON is power off when RDS data (“RDS test”) received for TUNER mode. 5. CD function Test mode specifications of the CD receiver Each press of the Track Up key jump

37、s to the following track numbers : No. 9No. 15No. 10No. 11No. 12No. 13No. 22 No. 14No. 9 (The cycle restarts from here.) Each press of the Track Down key jumps to the previous track number to the track being played. When the number of total tracks of disc is nine or less, unit playback from a track

38、1. When the media to CD-DA, unit playback from track No. 28 by key operation of preset 1 key. 6. AUDIO function Audio-related specifications A short press of the Q key initiates the audio adjustment mode. Pressing the OPEN/CLOSE key on the remote controller initiates the audio adjustment mode. Conti

39、nuous 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). Balance is adjusted in 3 steps of Left L15 / 0 / R15 Max with the Track Up/down keys (default is 0). Loudness : OFF 7. MENU function Menu-rel

40、ated specifications A short press of the PLAY/PAUSE key initiates the Menu mode. Pressing the DNPP key on the remote initiates the Menu mode. Continuous holding of a remote control key is inhibited. 8. OTHER Special display when the display is all on Pressing the Preset keys while the power is ALL O

41、FF dis- plays the following information. PRESET 1Version display (Month/Day/Hour/Minute) PRESET 2ALL segment light up for FL display PRESET 3Short press : Display CD operation time. Long press/hold : Clear CD operation time PRESET 5Short press : Display CD ejection count. Long press/hold : Clear CD

42、ejection count. FMROM correction version. If not mounting ROM correction chip set display shows ROM No_ 8 KDC-225/225MR/2025 ABCDE 1 2 3 4 5 6 7 PC BOARD (FOIL SIDE VIEW) W18 R431 R410 R407 R425 W35 C406 R64 R62 W37 R59 R60 R42 R41 W38 R44 R43 R65 R51 R66 R56 W36 R61R54 R58 R57 R52 C33 R106 R418 R31

43、5 W29 R162R160 C407 C408 R420 R411 R413 R28 W30 R314 C410 R53 R55 R12 R13 R25 R26R520 C32 C111 R154 R208 R152 R153 R27 W27 R312 R207 R210 R432 R209 R421 R422 R415 R419 R416 R417 W25 R161 R412 W39 C19 R1 C45 W31 W34 W32 W40 W33 R254 C5 R5 W41 R24 C521 R521 R430 W28 R523 R272 R32 C3 R6 R4 R522 C6 R252

44、 R33 R7R11 R10 R255 R271 R256 R273 R251 R2 R3 C4 C31 251 242 R257 R253 TH1 W24 W22 W19 W23 R313 W20 1 2 58 1 31 4 20 21 4041 60 61 801 814 17 43 12 C C EEB BE BE B E B E BE B E B E B B BE E E BEE C C E B DATA CLK 10.0MHz 32.768kHz R63 W241 W240 W237 W230 W238 W235 R21 C21 W223 W228 W220 W224 121 5 1

45、23 224 1 42 L10 C43C30 L12 L2/W239 W233 C409 W232 L11 C26 C1 C20 C41 C42 L1 16 1 9 8 C25 C22 C23 C24 C27 C28 C29 C255 C256 C258 R8 R22 R23 X1 R206 C201 C202 C251 C252 C253 C254 C257 R9 R31 R180 R181 R182 R303 X2 W187 W184 W181 W227 W180 W182 W191 W185 W195 W174 W178 W201 W171 W168 W164 W207 W208 W22

46、9 W216 W221 W177 W206 W210 W202 W203 W140 W166 W173 W152 W155 W135 W137 W130 W133 W138 W141 W145 W136 W128 W131 W236 W234 W231 W200 W196 W157 W156 W150 W148 W176 W149 W146 W147 W143 W175 W183 W192 W197 W193 W225 W179 W165 W218 W222 W214 W198 W194 W212 W209 W204 W215 W226 W213 W217 W219 W211 W205 W13

47、4 W189 W190 W127 W162 W129 W132 W188 W163 W153 W186 W169 W151 W142 W144 W139 W158 W159 W160 W161 W167 W170 W172 D41 Q401 D402 D524 Q41 D201 D202 Q4 D525 Q D25 Q23 D26 Q22 D22 Q1 Q521 D526 Q2 D521 Q252 Q3 D253 D255 D257 D258 D251 D256 J5 CN5 Q24 CN2 Q21 D1 D3 D21 D23 D31 D522 J1 D156 P1 D2 D4 D5 D269

48、D270 D271 D523 D24 D254 D252 IC8 IC1 IC6 IC11 IC9 IC3 IC4 ELECTRIC UNIT X25-9980-11/12/21 (J76-0016-02) 9 KDC-225/225MR/2025 JIHGF 1 2 3 4 5 6 7 Refer to the schematic diagram for the values of resistors and ca- pacitors. C301 W14 W18 W39 C204 C203 C205 W15 C206 W42 R211 576109 1311128432 1 W19 C210

49、 W16 W17 W10 R501 W8 C506 C507 R508 C113 C112 W3 W11 C213 R201 C212 R202 R203 R103 R105 W5 W6 R205 W13 R204 R111 W1 W2 R114 R112 R113 C114 C116 C108 C106 R104 R102 R507 W12 C105 W9 C302 C503 C502 C104 R101 R502 R503 61 1 13 24 12 C356 R355 R351 R356R352 18 169 18 169 141 31 2 14 15 1 91 2815 58 14 BE B E BE BE BE B E B E 4.332MHz W241 C211 C115 L7 R172 L6 L8 C117 C209 C251 254 C303 C351 C352 C504 L3 R171 R173 R174 R175 R176 R180 R182 R183 R301 R302 R303 R304 R305 R306 R307 R308 R309 R310 R311 R357 R358 R374 X3 W115