Kenwood KDC-MP425 Service Manual Download Page 1

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CD RECEIVER

KDC-MP425/MP6026

/W6027/W6027Y

SERVICE MANUAL

Size AA battery

(Not suplied)

Plastic cabinet assy
(A02-1486-13)

Lever
(D10-4589-04)

Screw set
(N99-1730-15)

DC cord
(E30-6295-05)

Screw set
(N99-1719-05)

Escutcheon
(B07-3098-02):KDC-MP425
(B07-3083-02):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

MODEL

TDF PANEL No. TDF NAME

KDC-MP425

Y33-1920-61

TDF-44D

KDC-MP6026

Y33-1920-64

TDF-MP6026

KDC-W6027/W6027Y

Y33-1920-65

TDF-W6027

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.

Summary of Contents for KDC-MP425

Page 1: ...083 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 MODEL TDF PANEL No TDF NAME KDC MP425 Y33 1920 61 TDF 44D KDC MP6026 Y33 1920 64 TDF MP6026 KDC W6027 W6027Y Y33 1920 65 TDF W6027 TDF PANEL INFORMATION KDC MP425 Panel assy A64 3194 12 KDC MP6026 Panel assy A64 3197 12 KDC W6027 W6027Y DC co...

Page 2: ...C3 POWER ANT CON P CON RESET IC8 SW 5V Q4 PANEL 5V Q152 SW5V S METER AUDIO OUT IFC OUT 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 DATAS L CE L DA...

Page 3: ... 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 positions 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 ho...

Page 4: ...iplex detector Bu5V 5V Audio8V 8V FM B 8V AM B 8V P CON ANT CON IC3 Power Supply IC IC4 Power IC Amplifies the front L R and the rear L R to 50W maximum IC6 Muting logic IC Controls logic for muting IC7 RDS decoder IC8 Reset IC L when detection voltage goes below 3 6V or less IC9 SW Regulator Power Supply for MP3 Q1 Serge Detection L when the back up voltage becomes more than 24V momentary power d...

Page 5: ...h 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 Q355 Pre Mute SW Mutes the Front Lch when the base is H Q356 Pre Mute SW Mutes the Front Rch when the base is H COMPONENTS DESCRIPTION SYSTEM MICROCOMPUTER UPD703030GC044 X34 IC1 Pin No Pin Name I O Application Truth Processing Operation Description value table 1 P...

Page 6: ...o CD mechanism 25 M RST O Reset output terminal to CD mechanism Normal H Reset L 26 MUTE I O MUTE terminal Hi Z Mute ON L Mute OFF 27 LOE LIM SW I CD DOWN SW DET terminal H Chucking 28 M MUTE L I MUTE request terminal from CD mechanism L Mute request 29 M MUTE R I MUTE request terminal from CD mechanism L Mute request 30 PANEL 5V I O Panel 5V control terminal Panel DET L Detached Momentary power d...

Page 7: ...erminal Not used O Non external display destination No OPEL DISP L 67 O CE I O External display CE terminal Not used O Non external display destination No OPEL DISP L 68 LX_RST O Reset output to external devices Normally L System RST return then after 400msec or more H then L 69 LX_CON O Control output to external devices ON H OFF L 70 AVCONT O AD reference voltage control output While in operatio...

Page 8: ...CLK input output terminal with external devices 97 L DATAL I Data input from LCD driver 98 L DATAS O DATA output terminal to LCD driver 99 L CLK O CLK output terminal to LCD driver 100 PLL DATA I O DATA input output terminal with F E Truth value table q PS1 0 PS1 1 PS1 2 AUDIO P CON P ANT L L L OFF OFF OFF H L L H L ON OFF OFF H H L ON ON OFF H H H ON ON ON w PS2 0 PS2 1 ILLUMI FM B AM B L L OFF O...

Page 9: ... Wide FMW Forced Middle FMM Forced Narrow FMN 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 the first track When this key is pressed the track goes down by on...

Page 10: ...ing the test mode Security Forced Power ON mode All models Even when the security is approved resetting the unit while holding the Q and 4 keys makes it possible to turn the power ON for 30 minutes After 30 minutes have elapsed it is not possible to return to the previous condition unless the unit is reset again Method of registration of the security code after EEPROM F E replacement Code security...

Page 11: ...E B EB B E B E C7 R10 C6 KI1 KS4 KI2 KS5 R8 CP1 C12 R9 R21 R22 R23 R24 R25 R6 DO PANEL 5V REMO DGND ILLGND KI5 ESD GND RESET KI4 VOL B VOL A IFLIP DE ILL B CE CL DI R7 C1 C2 C3 C4 C8 C10 C11 R1 R2 R33 C13 CP2 R3 R4 R5 R11 R12 KI3 KS3 DIMMER R14 R31 R32 1 2 15 16 1 100 76 75 51 50 26 25 Q2 J1 D21 Q3 Q4 Q5 IC1 SWITCH UNIT X16 2490 10 J74 1566 02 X16 2490 10 Ref No Address IC1 5D Q2 3C Q3 6C Q4 6C Q5...

Page 12: ...3 C31 R35 R34 C304 R372 R36 C403 R408 R370 R371 R315 R403 R404 R406 R401 R405 R203 R362 R364 R357 R355 R356 R352 R351 EB BE Q351 EB Q31 Q352 BE Q350 BE Q356 D203 D161 D162 D154 D153 D158 BE Q201 BE Q354 D205 D204 EB D352 D351 Q357 EB Q358 BE Q355 L3 W1 W2 W4 W7 W8 R8 R9 BU R W5 C256 C33 C258 C4 C301 C352 C351 C354 C353 C359 C358 C211 C216 C117 C115 X3 C221 C220 C208 C207 C209 C202 C201 C217 C219 C...

Page 13: ...1 12 W10 8 R9 R22 R23 L1 W29 IC3 W24 W21 W23 W27 W18 W17 W13 W12 W14 W9 BU5V RST W19 W22 R166 W25 W15 W20 W30 W33 W31 W34 W32 C22 C20 C21 E B B E E C C C1 C23 C29 C24 C26 C409 C28 C27 C41 C42 C44 C43 C25 D1 J1 14 8 7 1 IC6 25 50 26 51 IC9 X2 X1 D4 D31 D21 Q21 D2 D3 D401 D163 D164 D165 D25 D253 D23 D22 D251 D255 D24 D256 257 D258 L11 W35 L2 L12 X34 308x xx Ref No Address IC1 5J IC2 5H IC3 3L IC4 2I...

Page 14: ...C51 R64 C214 R51 R52 R57 R159 R314 R206 R423 C111 C401 R7 C3 R6 R4 R5 R11 C5 R10 R38 R313 R256 R252 R251 C6 R255 R3 R106 R205 R68 R162 R65 C52 R66 R312 R167 C402 C404 R13 R12 R164 C53 R69 R168 R160 R161 R185 R186 R62 R61 C406 R410 R53 C408 C407 C206 R202 R201 C204 C203 C205 C215 D26 D166 E B E B E E C C B Q151 E B Q152 D201 D202 E B Q153 E B Q154 B E Q1 B E Q3 B E Q32 E B Q2 Q23 Q4 1 2 4 3 IC8 ...

Page 15: ...108 R374 R378 R368 R367 R366 C119 R369 R111 C114 C113 C112 C163 R115 R101 C504 W102 R365 B E Q101 D359 17 1 2 18 CN1 DAUGHTER UNIT X89 2570 10 J74 1450 02 X34 308x xx Ref No Address IC8 5R Q1 4R Q2 4R Q3 3R Q4 5Q Q23 5Q Q101 5V Q151 7R Q152 7R Q153 7Q Q154 7Q Refer to the schematic diagram for the values of resistors and capaci tors ...

Page 16: ...1 C46 C32 CP6 R27 R47 C18 CP2 CP3 CP5 CP7 CP11 R6 R13 L1 R42 R46 R48 R49 R50 R63 R38 CP12 CP15 CP13 R68 CP14 R65 R67 C69 C67 C66 R66 R69 C72 1 3 4 5 1 16 33 48 32 17 64 49 B E C CBE Q5 Q4 Q7 S1 S2 S3 S4 IC3 IC6 CD PLAYER UNIT X32 5500 00 J74 1552 12 X32 5500 00 Ref No Address IC3 4AA IC6 5AB Q4 5AA Q5 5AC Q7 5AB Refer to the schematic diagram for the values of resistors and capacitors ...

Page 17: ...V FCS TRK MUTEL MUTER SLED SD TD S GND MOTOR SPDL MD FD MSTOP LIM SW T2 INT T1 RST T3 T4 FLAGIN SEARCH RESET BU3 3V STB TXD1 MICK CLK A0 BOOT MILP RXD1 LZM RZM MIRST MICS POND3 3 XI FOGUP MRST SLED IN LD LO EJ DGND EJECT LOAD DATA SLED OUT MUTER D5V 8EJE LOE LIM D GND FCS UP D3 3V TRK IN TRK OUT FCS DOWN LOS Lch MUTEL Rch MSTOP PON T ADCIN CLK FE D OUT Vref VR IOP PD C D VCC TE RF ARF F E F A B SD...

Page 18: ...5 1K R54 1K R53 1K GND 17 13 14 15 Rch 16 43 100K 100K R61 R62 18 20 19 Lch 18 21 SW1 22 19 25 28 29 90 R51 2 2K C52 0 01 23 24 SW2 R68 470 R64 100K R65 100K C51 0 01 R67 470 91 10 VILL CLK 15 17 20 19 18 16 19 20 16 17 ILL CON VOL A TEST DIM CON DSI 14 15 12 11 13 12 13 14 10 11 R DATA VILL DATA L CE REMO R QUAL VDD 8 9 7 9 8 C402 0 01 FLIP DET BEEP VSS 4 6 5 2 3 5 4 3 1 IC2 SDA IC2 SCL PANEL DET...

Page 19: ...AVREF 74 L12 220uH 100K 84 NOISE N C N C 81 82 83 80 84 100K R404 82 83 R402 R403 100K N C N C N C N C 79 78 76 77 R405 R401 100K R406 100K 100K C204 0 01 C206 150P 75 TYPE3 R407 22K R201 10K R202 4 7K 43 54 100u25 100u25 47K R42 C45 0 22 R41 47K R43 47K C41 C42 SWOUT ON OFF 2 3 4 5 VIIN 1 GND1 VOS 6 R44 47K C32 0 022 C33 1u50 2 2K 100K R 10 R36 R35 C213 0 1 C212 0 1 13 R203 4 7K R204 4 7K R205 2 ...

Page 20: ... 2 15 13 A R361 22K RL RL FR FR C254 0 22u50 C253 0 22u50 22K R9 33K 3 3K C5 22K 0 01 R8 13 R37 1K R11 1 2W 2 C3 1000P R6 10K 100K R3 R7 22K R5 10K R4 20K 82K R1 36K R2 59 9 47K 60 R251 C255 1u50 4 2 PWGND2 STBY C256 22u16 RIP 6 8 VCC2 PWGND1 10 12 IN2 TAB 1 OUT2 OUT2 3 OUT1 OUT1 5 7 RR RR VCC1 C257 1 R253 4 3K 9 R254 10 16 14 IN4 AUX IN 18 PWGND3 R257 15K TH1 C258 0 22u50 20 22 MUTE 24 PWGND4 C25...

Page 21: ...R412 R420 R411 379 R421 373 377 156 R24 358 Q23 CN4 D156 359 CN3 359 YES YES YES YES NO NO NO NO NO NO NO NO YES YES YES YES NO YES NO NO NO NO 10u50 NO YES NO YES YES NO NO NO YES NO NO NO NO NO NO NO YES NO YES NO NO YES YES YES NO NO NO NO YES YES YES NO NO NO NO NO NO NO NO NO NO NO YES YES YES NO NO NO YES NO YES NO YES NO NO NO NO NO YES NO 180 YES NO NO YES NO YES NO YES NO NO YES NO NO NO ...

Page 22: ... S42 S41 S39 S40 S38 S45 S43 S44 S46 49 S49 S48 47 48 S50 50 S51 S52 S53 52 51 S48 S49 S50 S52 S53 S51 R11 3 VO 2 VCC 1 GND 470 R9 C6 IC1 A IC2 SWITCH UNIT X16 2490 10 10K 10K 0V 0V 5V 5 0V 1 7V ON 3 3V 4 9V 6 5V 5 0V 8 3V OFF 5V 0V ON 5V OFF 0V 5V 0V 0V 5V 59 SEG11 5 2 1 3 4 8 6 7 9 S10 65 SEG5 SEG2 SEG4 SEG3 SEG1 68 69 S1 67 66 S3 S2 S4 SEG10 SEG6 SEG7 SEG8 SSEG9 62 64 63 S6 S5 S7 60 61 S9 S8 S4...

Page 23: ... TP21 KI2 TP19 TP18 KI1 84 9 R14 2 2K Q3 4 83 R12 2 2K 0 01 C8 R21 560 330 R22 330 R23 R24 330 330 R25 KDC MP425 W6027 W6027Y MP6026 2 2 SEG54 9 1 2 SEG60 SEG59 4 3 5 7 6 8 SEG57 SEG58 SEG56 SEG52 SEG51 SEG53 10 12 11 SEG55A SEG47 SEG46 61 SSEG9 SEG2 SEG1 69 68 SEG8 SEG7 SEG6 SEG4 SEG3 SEG5 66 67 65 63 64 62 49 SEG21 55 SEG15 SEG14 SEG13 SEG12 SEG10 SEG11 58 60 59 56 57 SEG20 SEG19 SEG18 SEG17 SEG...

Page 24: ... 62 53 55 54 58 57 56 52 51 DVCC NC NC NC NC NC NC NC NC NMI DVSS NC NC NC NC NC NC NC NC 7 20STBY 25 R17 100K C13 0 1 VREFL 96 SEL0 CHSEL ASEL 97 98 99 VREFH SEL1 100 4 6 5 20RST 20ACK 1 2 3 AVSS AVCC NC 5 6 0 1 C15 C16 4 7 20LP 17 12 7 8 9 NC 20INT FOGUP LZM NC 10 11 20CS RZM NC NC 16 15 13 14 10 100K R27 12 16 100K 13 CP6 DSPTXD1 20TXD0 20RXD0 20SCLK0 20 18 19 17 DSPSCLK1 AM0 DVCC DSPRXD1 24 23...

Page 25: ...100K FI1 44 42 IRQ VDDM 43 FI0 46 45 48 47 PI0 VSSM VSS3 PI1 49 50 PI2 PI3 C37 1000P 10 LRCKIA SDI1 SDI0 BCKIA LRCKO BCKIB 15 16 14 12 13 11 MILP MICK MIDIO MICS MIMD SDO BCKO VDDT1 MIACK 6 8 9 7 R23 10K 4 5 3 2 59 C41 0 33 TSTIN 51 52 53 PI4 VDD2 PI5 100K CP14 56 55 54 57 58 VSSP FI2 PDO VCOI VDDP 330 CP15 100K R48 R49 330 0 1 C43 RESET 61 60 62 63 64 XI VDDX CKIO XO VSSX 1M 100K R47 R46 1 100 R4...

Page 26: ...40 15 39 42 11 13 12 10 22 32 35 43 2 37 Bx2 Ax2 Jx2 DPU1 H F F G DFPC1 E A B C E F G H J K N09 4460 05 N09 4472 15 N09 6004 05 N09 6007 05 N09 6051 05 N19 2163 04 N39 2020 46 N09 6108 05 N09 6155 05 φ2x8 M1 7x8 5 M1 7x2 5 M2x2 φ2x6 BLK 1 6 WASHER M2x2 M2x3 5 φ2x6 X32 8 809 5 Cx2 EXPLODED VIEW CD MECHANISM Refer to the service manual X92 4030 0x B51 7867 00 for CD mechanism operation ...

Page 27: ... 45 N83 3005 46 N84 2005 45 N84 2606 45 N80 3008 46 N80 3010 46 N83 3020 46 N86 2606 46 208 215x2 RM1 260 244 771 770 772 728 765 720 206 261 201 SIZE AA BATTERY G G G F 216 234 237 251 217 236 240 233 767 746 704 218 241 745 203 Ex2 Kx2 E E H J L K E DME1 X34 702 E E Bx2 205 Dx2 Dx2 242 235 766 280 282 283 786 281 221 243 256 PA1 210 213 250 212 252 211 707 254 255 257 253 232 C Cx2 209 229x4 229...

Page 28: ...AT CABLE 24PIN 229 1D F29 0626 04 INSULATING COVER F1 2D F52 0006 05 FUSE MINI BLADE TYPE 10A 232 3C G01 3203 04 COMPRESSION SPRING 233 3D G01 3171 04 TORSION COIL SPRING LOCK 234 3D G01 3172 04 TORSION COIL SPRING PUSH 235 2C G01 3173 04 COMPRESSION SPRING REAR COVER 236 3D G13 1267 04 CUSHION 237 3D G13 1273 04 CUSHION H10 4856 12 POLYSTYRENE FOAMED FIXTURE H13 2043 04 CARTON BOARD H25 0329 04 P...

Page 29: ... 33UF K C42 45 CK73GB1C104K CHIP C 0 10UF K C46 CK73GB1H682K CHIP C 6800PF K C47 CK73GB1C104K CHIP C 0 10UF K C48 CC73GCH1H040C CHIP C 4 0PF C C49 CK73GB1H332K CHIP C 3300PF K C50 CK73GB1C104K CHIP C 0 10UF K C51 CC73GCH1H330J CHIP C 33PF J C52 CK73FB1A225K CHIP C 2 2UF K C53 CK73GB0J105K CHIP C 1 0UF K C54 55 CK73GB1H103K CHIP C 0 010UF K C56 57 CK73GB1H331K CHIP C 330PF K C58 CK73GB1H472K CHIP C...

Page 30: ...2B25MCG ANALOGUE IC IC7 XC6219B252MR ANALOGUE IC IC8 TC7SH08FU MOS IC IC9 TAR5S33 F ANALOGUE IC Q1 2SK3018F FET Q3 UMD9N TRANSISTOR Q4 2SK3018F FET Q5 UMD9N TRANSISTOR Q6 UMD12N TRANSISTOR Q7 DTC124EUAF DIGITAL TRANSISTOR Q8 2SB0970 TRANSISTOR Q9 10 DTC114YUAF DIGITAL TRANSISTOR C1 C94 0213 05 ELECTRO 2200UF 16WV C2 CK73GB1H103K CHIP C 0 010UF K C3 CK73GB1H102K CHIP C 1000PF K C4 6 CK73GB1H103K CH...

Page 31: ... 1 5K J 1 8W R22 23 RD14BB2C472J RD 4 7K J 1 6W R24 28 RK73GB2A103J CHIP R 10K J 1 10W K4M3 R25 28 RK73GB2A103J CHIP R 10K J 1 10W E2E3 R31 RK73EB2E103J CHIP R 10K J 1 4W R32 RK73GB2A223J CHIP R 22K J 1 10W R33 RK73GB2A473J CHIP R 47K J 1 10W R34 RK73EB2E103J CHIP R 10K J 1 4W R35 RK73GB2A104J CHIP R 100K J 1 10W R36 RK73GB2A222J CHIP R 2 2K J 1 10W R41 44 RK73GB2A473J CHIP R 47K J 1 10W R51 52 RK...

Page 32: ...068 N M ZENER DIODE D21 MA4082 N L ZENER DIODE D22 25 AM01ZNF DIODE D26 DAN202U DIODE D31 HZS5B1 ZENER DIODE D41 SFPB 54V DIODE D151 155 DA204K DIODE D157 162 DA204K DIODE D163 MA4062 L ZENER DIODE D164 MA4120 L ZENER DIODE D165 MA4062 L ZENER DIODE D166 DA204U DIODE D203 205 DAP202U DIODE D269 1SS133 DIODE D271 1SS133 DIODE D301 MA4062 L ZENER DIODE D303 304 MA4062 L ZENER DIODE D307 308 MA4062 L...

Page 33: ... GEAR 33 2A D14 0759 04 ROLLER 35 2B D21 2382 04 SHAFT 36 1A D23 0954 04 RETAINER 37 1B D39 0246 05 DAMPER 38 2B G01 3072 04 EXTENSION SPRING 39 2A G01 3073 04 TORSION COIL SPRING 40 2A G01 3074 04 EXTENSION SPRING 41 1B G01 3075 14 EXTENSION SPRING 42 2A G01 3076 04 EXTENSION SPRING 43 1B G01 3077 14 EXTENSION SPRING 44 2B G02 1399 04 FLAT SPRING 45 2B G02 1408 04 FLAT SPRING 51 1A J21 9676 22 MO...

Page 34: ...25 530kHz 1700kHz 10kHz KDC MP6026 531kHz 1611kHz 9kHz 530kHz 1700kHz 10kHz Channel Space Selection 9k 10kHz Usable Sensitivity S N 20dB 28dBµ 25µV CD Laser Diode GaAlAs λ 780nm Digital Filter D A 8 Times OverSampling D A Converter 1 Bit Spindle Speed 1000 400 CLV 2 times Wow Flutter Below Mesurable Limit Frequency Response 10Hz 20kHz 1dB Total Harmonic Distortion 0 01 1kHz S N Ratio 105dB 1kHz Dy...

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