Kenwood KDC-MP425, KDC-MP6026, KDC-W6027 Schematics
A B C D E
2
2
3
3
40
C
0V
0
5
KDC-MP425/MP6026
KDC-W6027/W6027Y
1
2
∗
E
WIRED
REMO/OEM
3
4
5
6
7
18
DISP OUT
OPEL
REMO
1
52
3
4
GND
1
REMO
2
O CE3
O CLK
4
O DATA
5
to
CD MECHA
UNIT
X34-308x-xx (1/4)
ELECTRIC UNIT(X34-308x-xx)
J4
ANT.
∗
A1
CN5
2
R369 470
1
CN6
R368 470
3
R367 470
2
R366 470
1
∗
D351
R68
CN2
Lch 18
C52
24
23
21
19
15
14
13
12
11SW4
9
8
7
6
5
4
3
2
1
D-OUT
SW2
SW1 22
MS-CLK
MS-DA
AUDIO+B
GND 17
Rch 16 43
MUTE-R
MUTE-L
M-RST
M-STOP
SW3 10
BU5V
DGND
DGND
D4.5V
D4.5V
LO/EJ
MOSW
SERVO+B
SERVO
GND
OSCGND
OSCGND
OSCGND
OSCGND
S-METER
470
0.01
19
1820
C21
100u10
FM/AM
TUNER
RFGND
FMIN
AMIN
N.C
AM+B
N.C
PLL+B
IFCOUT
SDA
D-GND
VDD5V
N.C
N.C
AUDIO
N.C
IF+B
IF GND
R65 100K
SERVO
Q21
+
VT
R62
D21
R67
C51
100K
470
0.01
R21
1.5K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
R61
100K
L3
R102 470
R104 470
L7 4.7uH
L8 4.7uH
R372 100
R371 100
R370 100
R64 100K
R51 2.2K
R52 2.2K
R53 1K
R54 1K
R55 1K
R56 1K
R58 2.2K
R63
2.2K
R59 100
R60 2.2K
SW14
Q22
∗
D352
L6 4.7uH
R101 1K
4.7K
R105
R106
2.2K
C503
4700P
∗
C
65
66
67
91
90
29
28
25
24
27
23
22
R103
4.7K
C357 0.01
C356 0.01
∗
C119 0.01
∗
R373 1K
∗
100
C111
1000P
IC1
IC2
IC3
IC4
IC7
IC8
IC9
D359
C360
0.01
84
1SCL
13
82
: UPD703030GC044
TDA7411
:
BA4911-V4
:
TB2903H
:
HD74HC27FP-E:IC6
SAA6581T
:
PST3436UL
:
SI-8050JD
:
4
∗
D
Q101
4.7K
5V
0V
1
3
4
5
5.0V
0.01
C402
0V
8
9
10
11
12
13
14
16
17
0V
19
20
21
22
23
24
25
5V
0V
R408 100K
RESET
IC
0V
Q1-3,41 :
Q4
Q21::
Q22,23
Q32::
Q101,201,351,352,
355-358
Q151 :
4.7K
R111
L9
4.7uH
1
PLL CLK
2
N.C
3
PANEL DET
4
IC2 SDA
5
IC2 SCL
6
VDD
7
VSS
8
FLIP-DET
9
BEEP
10
REMO
11
R QUAL
12
R DATA
13
L CE
14
VILL DATA
15
VILL CLK15
16
DSI
17
DIM CON
18
TEST
19
ILL CON
20
VOL A
21
VOL B
22
MOSW
23
LO/EJ
24
M STOP
25
M RST
IC8
NC3VDD
VSS4VOUT
2SC4081
2SA1036K
:
2SD2375
UMC2N
DTC144EUA:Q31,153
DTA123JK
DTC143TUA
DTA114YUA
RDS
DEMODULATOR
5V
IC7
C117
2.2u50
5V
0V
5V
0V
26
MUTE
26
+
C116
330P
680P
C118
5V
0V
or 0V
5V
0V
M-MUTE L
LOE/LIM SW
282729
28
27
100K
R410
0V
1
QUAL
2
RDDA
3
2.5V
VREF
4
2.5V
MPX
5
5.0V
VDDA
6
0V
VSSA
7
2.5V
CIN
2.5V
SCOUT MODE
99
98
97
100
1009799
98939596949291
L CLK
L DATAL
L DATAS
PLL DATA
5V
0V
5V
0V
5V
0V
RESET
PANEL 5V
M-MUTE R
31
30
29
30
RST
D401
0.1
C406
2SA1576A
:
2SA1577
:
DTA124EUA
:
RDCL
5V
0V
TCON
OSCO
OSCI
VDDD
VSSD
SYNC
95
96
94
LX-CLK
8EJE SW
LX-DATA-S
LX-DATA-M
5V
0V
XT2
XT1
333235
34
3.3V
R422 10K
32.768kHz
X2
C405 1
C408 27P
C407 22P
D1
D2-4,309-311,357,358
D21
D22-25
D26
D31
D32
D41
R114
2.2K
16
15
R115
2.2K
14
13
12
5.0V
11
0V
10
0V
0V
98
91
92
8889878684
90
EJECT
LO.S SW
KEY-REQ
12EJE SW
5V
0V
5V
0V
5V
0V
SYSYTEM
MICROPROCESSOR
X2
REGC
X1
36
R409
15K
X1
:
1N5393G-M6
:
MA4068(N)-M
:
MA4082(N)-L
DAN202U
:
HZS5B1
:
MA4056-M
:
SFPB-54V
:
X3
4.332MHz
C114 0.01
888990
87
R-CLK
LX-REQ-S
IC1
VSS
37
0V
20.000MHz
C404
0.01
C112
27P
C113
27P
+
C115 10u16
868485
85
IFC-OUT
LX-MUTE
LX-REQ-M
5V
0V
5V
0V
VDD
38
39
5.0V
∗
∗
∗
82
83
0-4.9V
0-2.2V
82
83
NOISE
S-METER
or
5V
0V
CLKOUT
R411 22K
R416 22K
R420 22K
R404
D
D
D
DAM01ZNF:
D
D
D
100K
0V
81
87
R113 2.2K
11
R112 2.2K
12
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5.0V
2
4.6V
1
Q152
Q154
Q350,354
3
VDD
84
0
U
U
U
C
C
C
C
C
C
12
P
13
P
+
84
IFC-OUT
5V
0V
SOR
39
∗
∗
∗
82
83
0-4.9V
0-2.2V
82
83
NOISE
S-METER
or
5V
0V
CLKOUT
R411 22K
R416 22K
R420 22K
R404
100K
5V
0V
0V
81
D301
D303
R315 100K
C304 0.01
D311
D310
100K
R403
0V
80
N.C
IC2 TYPE0
IC2 TYPE1
41
40
0V
0V
100K
R402
0V
79
N.C
TYPE2
TYPE1
42
43
0V or 5.0V
0V or 5.0V
R303 100
R304 4.7K
866985
R401
100K
R405
0V
787677
N.C
N.C
5V
0V
CD MECHA+B
TYPE0
46
45
444947
0V or 5.0V
∗
R412 22K
∗
R417 22K
∗
R421 22K
R415 22K
R419 22K
R305 4.7K
100K
0V
N.C
0V or 5.0V
SW5V
PS2-0
46
R406
48
LX-CN
J2
2610
3711
4812
R302 10
R306 4.7
+
+
C302
C303
47u10
0.47u50
6
8
100K
0V
N.C
5V
0V
PS2-1
PS1-0
PS1-1
50
494748
50
915
13
R301 10
R310 100
R307 4.7K
5V
0V
5V
0V
R311 100
+
C301
0.47u50
6894959688
0V or 5.0V
TYPE3
PHONE
5V
AVREF
0V
AVSS
5.0V
AVDD
AVCONT
5V
LX-CON
0V
LX-RST
O-CE
5V
O-CLK
0V
O-DATA
5V
AFS
0V
PRE MUTE L
PRE MUTE R
N.C
5V
P-STBY
0V
P-MUTE
N.C
EXT AMP CON
BVSS
5.0V
BVDD
DIMMER
5V
ACC-DET
0V
B.U-DET
PS1-2
R309 4.7K
R308 4.7K
75
74
0.6V-4.2V
73
72
0V
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
0V
55
54
53
52
51
0V or5.0V
REQ H
1
2
3
CHCON
4
5
6
A GND
R314 100K
R313 100K
D308
R312 100K
D307
D309
D304
∗
∗
C401
0.01
C403
51
69
68
67
66
65
64
63
62
60
59
57
54
53
52
B.U
R423
22K
R407
22K
0.01
C409
74
47u6.3
7RST
8GND
9
10 DATA C
11MUTE DATA H
12
13
+
Rch
REQ C
Lch
CLK
43
R201 10K
R202 4.7K
C204 0.01
C206 150P
+
C44 220u16
C43 220u16
KDC-MP425/MP6026
KDC-W6027/W6027Y
+
C202
0.47u50
+
C201
0.47u50
4.0V
4.0V
44
43
LEVEL
13
4.0V
MPIN
MPOUT
14
0V
CDL
QUAL
15
4.7K
1
2
3
8CDCHR+
6
4.0V
C214 0.01
C215 0.01
C205 0.47
4.0V
4.0V
C203 0.022
4.0V
4.0V
4.0V
4.0V
4.0V
10
11
1
2
3
4
5
6
7
8
9
AUXL
AUXC
AUXR
CDCHRCDCHL-
CDCHL+
NV+
NV-
AM
MPX
12
4.0V
Q201
R203
4.7K
C213 0.1
0.1
13
C212
47K
R44
L12
220uH
13.4V
+
D41
D162
0V
R41
Q41
47K
R43
47K
47K
C45
R42
0.22
213L CE
∗
D156 D161 D155 D154D160 D159 D158D153
C41
100u25
435
+
C42
100u25
CD MECHA+B
14.3V
IC9
+
100K
R162
D165
C207 1u50
C209 2.2u50
∗
∗
4.0V
4.0V
39
404142
MDL
CDR
MDR
SUBL
CREF
IC2
ELECTRONIC
VOLUME
& FM MPX DETECTOR
5V
0V
AFS
16
380mV
1K
R206
∗
R204 4.7K
R205 2.2K
83
64
0V
5.0V
234
5
1
VIIN
VOS
GND1
SWOUT
ON/OFF
6
C208 1u50
∗
4.0V
MUTE
17
D203
17
2.4V
0V
6
7
+++
4.0V
SUBR
3.6V
17
R163
4.0V
363738
ACOUT L
ACOUT R
SDA
18
R207 1K
4
100K
R210
10K
C225
C223
C227
18
0.1
0.1
1
54
8
JIHGF
33K
33K
R213
35
ACIN0L
5V
0V
R209
10K
19
18
19
R36 R35
2.2K 100K
+
C33
1u50
10
0.1
C224
0.1
C222
1
C226
34
ACIN0R
SCL
192120
4.0V
R208 1K
5
DIMMER
Q31
47K
47K
R185
R216R215
33K
∗
4.0V4.0V
FREEL
FREER
4.0V
21
20
470K
33K
R214
B
OUT LR
22
4.0V
C32
O
O
0.022
A
A
A
A
A
A
O
R
1
11
6
D151-162
D163,165,301,303,304,
-M
307,308,356
-L
D164
D203-205
D269,271,401
D351 MA3062WA
:
DA204K
:
MA4062-L
:
MA4120-L
DA204U:D166,352,359
DAP202U
:
1SS133
:
:
SIGNAL LINE
GND LINE
B LINE
B LINE
0.01
C502
D166
P1 CN1
2
1
ESD GND
R151
∗
14
470
3254
V DATA
R152
435
1K
99
R153
L CLK
97
470
R154
L DATAL
1K
687
L DATAS
2.2K
R155
768
470
R156
∗
V CLK
FLIP DET
15
1K
R169
∗
(DIM-COM)
17
9
Q151
47K
EJECT ILL
8
89
98
21
20
16
470
470
R159
R158
R157
10K
11
12
10
1110 1312
VOL B
VOL A
X34-308x-xx (2/4)
1K
92
13
EJECT
RST
R160
14
RESET
14
2.2K
10
REMO
R188
47K
19
Q154
R187
2.2K
19
Q15
47K
47K
K L M N O
2
2K
20
ACIN0R
O
L
L
5
2
6
4.0V
KDC-MP425/MP6026
KDC-W6027/W6027Y
R216
33K
∗
4.0V
FREEL
FREER
21
4.0V
21
20
R35
100K
DIMMER
Q31
47K
7K
33K
R214
B
OUT LR
22
4.0V
C32
ACIN1R
ACIN1L
ACIN2L
ACIN2R
ACIN3R
ACIN3L
OUT LF
OUT FR
OUT RR
R34
10K
0.022
GND
∗
D356
4
17
26
0V
5.0V
R211 33K
C218
C220 0.1u50
0.1u50
33
4.0V
+
C219
0.1u50
32
4.0V
+
31
4.0V
30
4.0V
4.0V
29
4.0V
28
8.0V
27
VS
C210
26
0V
25
0V
24
4.0V
23
4.0V
C216 1u50
+
C217 1u50
+
0.01
C211
+
R212 33K
C221 0.1u50
+
L10 4.7uH
+
47u10
C6 0.01
FR
52
MUTE
DRIVE
IC6
141213
VDD
1
0V
R5
Q2
10K R4
2
0V
R7
22K
B.U. DET
R6 10K
FR
RR
EEPROM
IC10
1
A0 VCC
2
A1
3
A2
GND SDA
(NOT USED)
C5
0.01
ACC DET
13
53
15
74
TEL MUTE
R33
D31
C31 0.01
47K
R31 10K
R32 22K
EXT AMP
CONT
R37
∗
A
Q32
47K
14
1K
2.2K
D32
R38 560
57
345
0V
Q1
C3 1000P
Q3
22K
R10
RST
5.0V
5.0V
5.0V
10911
0V
0V
SERGE DET
20K
R3
100K
8
7
TEST
6
SCL
54
R11
22K
D4
R9
33K
C4
R8
0.01
5.0V
D3
D2
3.3K
19
18
1/2W
6
5.0V
C7
0.01
0V
8
GND
7
0V
R1
82K
R2
36K
2
63
59
D204
62
D205
R255 330
R256 330K
C258 0.22u50
TH1
R257
R254 10
9
C253 0.22u50
C254 0.22u50
C256 22u16
+
R251
47K
60
Q354
MUTE SW
Q350
D269
+
15K
D271
1u50
C255
22K
22K
C257
W203
W204
2
1
∗
D357
3
RR
17
22K
FR
22K
21
20
IC4
24
0V
PWGND4
22
0.2V
MUTE
20
14.2V
VCC1
18
0V
PWGND3
1R253 4.3K
16
3.5V
AUX IN
14
IN4
3.4V
12
IN2
10
8.0V
RIP
8
0V
PWGND1
6
14.2V
VCC2
+
4
4.6V
STBY
2
0V
PWGND2
∗
W105
∗
W103
D358
∗
∗
W106
∗
W104
AUDIO
POWER IC
CLIP OUT
PREGND
3.3V
OUT4OUT4+
OUT3OUT3+
OUT1+
OUT1OUT2+
OUT2-
TAB
∗
47u10
∗
∗
10u16
10u16
10u16
10u16
IN3
IN1
C355
+
C359
+
C358
+
C353
+
C354
+
C351
+
C352
+
25
23
21
19
17
15
13
11
9
7
5
3
1
0V
7.1V
7.1V
7.1V
7.1V
3.5V
3.5V
7.2V
7.1V
7.1V
7.1V
R359
360
R360
360
R351
360
R352
360
0V
Q351,352,355-358
MUTE SW
∗
W107
∗
R375
360
4.7K
∗
Q357
4.7K
∗
Q358
∗
R374
360
∗
W108
Q355
4.7K
4.7K
Q356
Q351
4.7K
4.7K
Q352
RLRL+
FRFR+
C251
0.22u50
W201
C252
0.22u50
W202
RR+
RR-
∗
R379
∗
R36
∗
∗
W101
R378
RL+
RLFR+
RR+
FR-
RR-
13
14
15
4.7
∗
W10
∗
C
3
2
1
F
F
PA
PC
A
2
22K
R377
∗
22K
R376
∗
R363
180
22K
R361
22K
R362
R364
180
R357
180
22K
R355
22K
R356
R358
180
FR
RR
11
D158 D152 D151D157
470K
19
R186
470K
12
R164
154
Q153
47K
.
0.01
C501
D164
47K
ILL +B
ILL GND
X34-308x-xx (3/4)
20
47K
18171615
PAN 5V
W109
D GND
Q4
47K
R12
10K
D26
R13
5.6K
46
51
49
50
∗
Q23
10K
R25
10
SW1
7
5
VDD
3
1
L11
4.7uH
13
14
2.2M
R161
470K
R167C163
R168 1K
3
R165
R166
47K
4.7K
30
Q152
2.2
C500
D163
0.01
PANEL
DET.SW
S1
Q23
POWER
SUPPLY
CONTROL
IC3
POWER
SUPPLY IC
C27
10u50
+
10.3V
12
ILM
R28
48
47
10K
10K
R26
R27
11
SW2
SW5V
R24 10K
∗
+
C26 10u25
C28 220u16
5.0V
13.1V
897
VBU
VDD
+
C1
C2
C23
∗
14.0V
10u25
∗
R22
4.7K
D22
D24
+
C22
10u25
0V
+
1
2
GND
PCON
R23
4.7K
+
+
C25 10u16
+
C29 10u16
C24 10u16
D23
+
D25
∗
W10
8.1V
7.9V
5
W20
∗
4
3
FM
AM
PANT
14.3V
VCC
8.1V
6
AUDIO
0.01
L1
140uH
D1
KDC-MP425/W6027/W6027Y/MP602
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