Kenwood KDC-7027 Schematics
A B C D E
0
8
MOTOR
KDC-7 027/7027Y
1
2
3
4
5
PANEL MECHA ASSY
6
7
20
EXTERNAL DISPLAY &
STEERING REMOTE CORD
12
43
519
6210
11
873412
LX-BUS
M
PH
S-MOTOR
P-MOTOR
RLED
(1K)
SW3
M
SW2
15
14
13
12
11
10
RPH
(100K)
(1K)
SW4
SW1
X34-3042-72 (1/4)
13
12MOTOR+
MOTOR-
MOTORMOTORMOTORMOTORMOTOR+
MOTOR+
9
MOTOR+
8
MOTOR+
7
PH-OUT
6
SW5V
5
SW4
4
D GND
3
SW1
2
SW2
1
SW3
O-CLK
O-DATA
O-CE
REMO
LX-RST
AUDIO GND
LX-CON
LX-MUTE
LX-CLK
LX-REQ-S
LX-DATA-M
LX-DATA-S
LX-REQ-M
ANT.
ELECTRIC UNIT (X34-304x-xx)
CN3
TP15
∗
R310 470
TP16
∗
∗
TP14
A1
TP17
TP18
TP20
TP21
TP22
TP23
TP24
TP25
TP26
TP19
TP27
TP28
TP29
TP13
26
TUNER
R61
D66
25
RFGND
FMANT
AMANT
OSCGND
AM+B
OSCGND
OSCGND
OSCGND
COM+B
IFCOUT
SDA
SCL
DIGGND
VDD
AOUT
SMETER
IF1+B
IF1GND
R309 470
∗
R311 470
∗
R308 1K
R315 4.7K
R313 4.7K
R314 4.7K
R319 100
R316 4.7K
R318 100
R317 4.7K
R312 100
1K
NC
NC
VT
NC
NC
NC
C71
Rch
1
2
Lch
GND
CN2
+B
2431
8657
109
12
11
1413
1615
1
2
W2
3
2
1
∗
D54
R2
10
R3
4.7
R1
10
D53 D52
0.01
TP89
1
TP80
2
3
4
TP81
5
TP82
6
7
8
C401
9
10
11
TP83
12
TP84
13
TP85
14
TP86
15
16
TP87
17
18
19
TP90
20
21
TP91
22
TP88
23
24
∗
C4
0.47
C5
47u6.3
C3
0.47
0.01
D55
C403
to CD MECHANISM
SERVO GND
SERVO +B
CN4
D50
4
+
6
TP59
TP60
68
67
69
10
43
42
41
96
88
95
94
40
D51
L7
Q103
22K
R403
AM+B SW
1K
R402
Q102
22K
2
22K
0.01
84
1
100
L11
0.01
4.7uH
C405
L12
4.7uH
0.01
C407
82
5.0V
MOSW
LO/EJ
TP61
61
62
7.6V
64
63 65
5V
0V
D-GND
BU5V
5.0V
D-GND
TP62
TP63
TP64
L2
+
C113
+
220u16
C112
220u16
∗
E
R406 2.2K
92
R407 2.2K
93
C408
2.2
C411
R404
330P
4.7K
Q104
4.7K
IC13 IC14
NC10
1
VCC
OUT1
2
NC2
3
IN1
4
OUT2
IN2
0V
5
SGND
PGND
IC13,14
MOTOR DRIVER IC
for PANEL MECHA
NC8
TP65
R321
2.2K
2.4V
2.4V
5.0V
10
9
8
7
6
NC
SW3
TP66
60
R111
47K
D5
44
RDS DECODER IC
5V
∗
IC12
0V
1
QUAL
2
RDDA
5V
0V
3
VREF
4
MPX
5
OSEL
0V
6
GND
7
ARI
8
FILOUT
0V or 7.6V
0V or 7.6V
0V
M STOP
TP68
59
R109
47K
0.22
C114
Q10
SW for IC5
RDCL
OSCOUT
OSCIN
EXTRES
FSEL
0.22
C259
0.22
C260
M RST
MUTE L
TP69
587470
14.4V
0V
Q10
47K
R110
T57
VCC
TM
TP30
21
MOTOR+
16
15
14
13
12
11
10
9
MOTOR-
TP70
∗
TP31
MUTE R
TP71
A
5.0V
0V
0V
0V
66
Rch
43
R405
2.2K
5V
0V
C110
L13
AGND
TP72
+
100u25
87
5V
0V
X3
4.332MHz
4.7uH
7.6V
0V
Lch
TP73
TP74
C111
100u25
C412
10P
C413
10P
C409 0.01
C410 10u16
1
2
3
4
5
AUDIO 8V
MS DA
SW1
MS CLK
TP76
TP75
TP77
SCL
SDA
90
0V
14.4V
1
IC5
+
VIIN
SWOUT
IC5
SWITCHING
REGULATOR IC
for CD5V
+
10
NC10
VCC
NC2
IN1
IN2
SGND
9
OUT1
8
NC8
7
OUT2
6
PGND
807978
TP38
TP37
TP36
1234567
CN6CN7
SW2
SW3
SW2
TP78
R323
2.2K
R322
2.2K
91
2.4V
5.0V
5
432
VOS
GND1
0V or 7.6V
C261
SW1
D OUT
242322212019181716151413121110987654321
TP79
0V
ON/OFF
0.22
C262
0.22
TP35
D-GND
77
SW4
SW5V
81
TP34
PH-OUT
21
JIHGF
2
2
D
OUT
5
5
5
5
K
TP35
KDC-7 027/7027Y
(X34-304x-xx)
KDC-MPV8025
KDC-W7027
KDC-MP825
4
23
K
22
K
V
KDC-7027/Y
KDC-8026
R279 4.7K
1
2
4
5
8
9
10
11
SDA
SCL
R267 47K
15
16
17
20
21
22
23
24
25
RESET IC
MODEL
NAME
R277 470
R274 1K
R273 2.2K
R269 4.7K
R272 4.7K
R268 33K
R266 1K
R265
R271 470
R270 470
100K
3
0V
4
UNIT
ABCDE
No.
0-10
YES
2-71
YES
0-11
YES
2-72
NO
0-21
YES
5V
0V
5.0V
0V
5V
0V
IC7
VDD
NC
OUT
VSS
C206 1
YES
YES
YES
NO
YES
YES
NONOYES YES
YES
YES
1
PLL DATA
2
AM+B
3
(FM+B)
4
V ILL PAN-E2P DATA
5
V ILL PAN-E2P CLK
6
EVDD
7
EVSS
8
AFS
9
BEEP
10
REMO
11
P MUTE
12
(SVR)
13
IC2 SDA
14
IC2 CLK
15
P STBY
16
P CON
17
DIMMER CON
18
TEST
0V
19
TYPE2
20
MUTE
21
PRE MUTE L
22
PRE MUTE R
23
BU DET
24
ACC DET
25
SW5V
5.0V
2
D20
R207
1
TP119
NO
NO
YES
YES X86-3732-70
NO
NO
NO
YES
R280 4.7K
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
100K
5V
0V
5V
0V
A1
X86-3730-11
X86-3730-11
X86-3732-70
X86-3730-11
100
99
R278 470
R245 1K
1009998
L CLK
PLL CLK
5V
0V
5V
0V
5V
0V
5V
0V
C23,
C100
24
YES
2200u50
YES
3900u50
NO
2200u50
YES
3900u50
YES
2200u50
98
97
R247 100K
R250 100K
R248 1K
R246 1K
97
L DATAL
L DATAS
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
DIMMER
ANT CON
EXT AMP CONT
2627282930
2.2K
R264
262728
29
C252
C94-0052-05
C94-5540-05
C94-0052-05
C94-5540-05
C94-0052-05
95L596
600
969594
LX CLK
LX DATA M
5V
0V
5V
0V
P ON
ILL ON
RESET
31
31
30
94
R251 100K
LX DATA S
5V
0V
R201
31
C202
32
10K
22P
D54,
R146
R203
55
NO
YES
NO
YES
YES
YES
NO
NO
NO
YES
YES
YES
NO
YES
NO
92
93
R252 100K∗R253 100K
∗
9392919089
R DATA
R QUAL
SYSTEM u-COM
XT2
XT1
333435
X2
32.768kHz
27P
C203
C204 1
R204
YES
NO
YES
YES
91
90
R254 2.2K
R255 2.2K
CD SW1
CD SW2
IC1
REGCX2X1
R200
15K
3.3V
X1
R225-227,
R206
R205
NO
NO
YES
NO
YES
YES
NO
NO
NO
YES
88
R257 100K
R256 100K
∗
8887868584
KEY REQ
LX REQ S
5V
0V
5V
0V
VSS
3637383940
0V
5.0V
20.000MHz
308-311
YES
YESNO
YES
YES
NO
87
R CLK
VDD
CLKOUT
NC
5V
0V
LX REQ M
40
R252,
253,257
YES
NO
YES
NO
YES
R259 1K
R275 100K
0V
POWER-DET
5V
0V
LX MUTE
41
R202 100K
41
R281
YES
YES
YES
NO
YES
83
84
R260 2.2K
C211 1000P
0-2.0V
83
NOISE
IFC OUT
5V
0V
5V
0V
5V
0V
LX CON
LX RST
42
434445
R281 47K
∗
42
43
W1
NO
YES
NO
YES
NO
82
82
R261 2.2K
0-5.0V
82
S METER
3.5V
0V
CD MECHA+B
TYPE0
R203 10K
∗
44
81
80
R239 2.2K
R238 2.2K
R262 1K
2.2K
R235
R234
81
80
PH-OUT
FPM SW3
5V
0V
4.6V
0V
0V or 5.0V
TYPE1
46
R204 10K
R205 10K∗R206 10K
∗
∗
79
R240 2.2K
2.2K
79
FPM SW2
2.5V
0V
IC2TYPE0
484950
47
R209 10K
R208 10K
78
R241 1K
2.2K
R236
R237
787776
FPM SW1
or 5.0V
5V
0V
0 or 2.5V or 5.0V
5V
0V
IC2TYPE1
PAN5V
E2P5V
50
76
77
2.2K
0.6V or
1.6V or
4.2V
PAN DET
PHONE
M MUTEL
FPM SW4
5V
0V
AVREF
AVDD
5V
M MUTER
0V
O CLK
5V
O DATA
0V
FPM MOTOR C
FPM MOTOR O
FPM MOTOR F
FPM MOTOR B
MOSW
LO/EJ
CD SW3
M STOP
5V
M RST
0V
VOL B
5V
BVDD
0V
5V
VOL A
0V
5V
0V
AVSS
O CE
BVSS
L INH
L CE
5V
R233 100
0V
R232 1K
75
R230 1K
74
5V
R231
0V
0V
R228 1K
0.01
C208
0.01
C207
5V
0V
∗
R227 100
∗
R226 100
∗
R225 100
R224 1K
R223 1K
R222 1K
R221 1K
R220 100
R219 100
R218 2.2K
R217 1K
R216 1K
R215 4.7K
0V
R214
4.7K
R213 1K
R212 1K
R285 1K
R229
100K
100K
73
72
71
5.0V
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
5.0V
54
53
52
51
DSI
.6V
0V or 7.6V
0.22
81
77
56 789101112131415
SW4
SW5V
TP34
PH-OUT
MOTOR +
TP33
MOTOR +
MOTOR +
MOTOR +
MOTOR -
TP32
MOTOR -
2
MOTOR -
MOTOR -
52
53
57
54
R325 4.7K
ILL+B
NC
TP54
REMO
R324 4.7K
TP53
VOL-A
TP52
NC
VOL-B
TP51
L-CE
TP50
L-INH
TP55
TP57
TP56
TP58
1234567891011 1213 14 15 1617181920212223
CN5
PAN5V
NC
D-GND
D-GND
ILL-GND
ILL-GND
ILL+B
TP49
99
98
97
L-DATAL
TP48
17
R329 4.7K
TP46
TP47
TP45
CONT
L-CLK
DIMMER
L-DATAS
X16-254-
2/3
A
CN1
31
RST
TP44
50
22K
4
51
R327
4.7K
100
R330
TP42
NC
DSI
DATA
PAN-E2P
TP43
24
E2P5V
R328
4.7K
R331
TP41
5
75
470
100
R332
TP40
25 26 27 28
CLK
PAN-E2P
PAN-DET
ESD-GND
TP39
ESD-GND
Q63
E2P 5V
22K
SW
D65
D63D64 D62
P1
X34-3042-72 (2/4)
R326
100K
D60
21
K L M N O
2
D34
Q
8
D39
F
O
KDC-7 027/7027Y
IC1 :
UPD703030GC042
IC2 : TDA7411
IC3 : M5237ML
IC4 : TDA7560
IC5 : SI-8050JD
S-80837CNNBIC7 :
IC8 : TC74HC02AF
IC12 : TDA7479D
IC13,14 : LB1930M
Q1,8,9,13 : 2SA2057
Q2,10,14,32-34 : 2SC4081
Q3,27 : 2SA1576A
Q5,11,54,102 : DTC124EUA or
Q6,30 : DTC144EUA or
DTA124EUA or
:Q4,7,12,28,51,52,63
UN5112
UN5212
UN5213
Q23,26 : DTC114YUA or
Q24,25 : 2SB1240
Q28 :
Q29 : DTA123JK or
Q53,55,56,59,60,104
Q103 : 2SB1188(Q,R)
UN5214
DTA114EUA
KRA105S
: DTC143TUA or
UN5216
D1 : 1N5393G-M5
D2 : RB160L-40
D3 : MA4056(N)-M
D4 : MA4082(N)-L
D5 : SFPB-54V
D6 : MA4110-L
D9-12,33-40 : 1SR154-400 or
D13,20,29-31 : 1SS133
S1J
D14 : MA4056-M
D15 : MA4047-M
D16 : MA4068(N)-M
D17 : MA4062(N)-M
D23,24 : DAP202U or
D25-27,50 : RD6.8M(B2)
D28,51 : RD6.8MW
D52-55,60,62 : MA3062WA
MA142WA
D63-65 : DA204U
D66 : IMSA-6
230 1K
28 1K
5V
0V
0.01 0.01
5V
0V
R233 100K
R232 1K
∗
R227 100
∗
R226 100
∗
R225 100
R224 1K
R223 1K
R222 1K
R221 1K
R220 100
R219 100
R218 2.2K
R217 1K
R216 1K
R215 4.7K
0V
R214
4.7K
R213 1K
R212 1K
R285 1K
D60
R231
R229
100K
100K
43
C1
+
10
11
1
2
3
4
5
6
7
8
9
AUXL
AUXC
AUXR
CDCHR+
CDCHRCDCHLCDCHL+
NV+
NV-
AM
MPX
LEVEL
12
4.6V
R300
0.1
C254
4.7K
0.47u50
4.2V
44
CDL
MPIN
13
4.5V
4.2V
14
0V
C253 0.1
D25 D26
2
3
4
82
6
C12
0.01
L4
4.7uH
0.01
10KR80.022
R7
4.7K
C10
150P
0.47
C11
C9
74
70
69
68
67
66
65
64
63
62
61
60
59
58
75
57
54
53
52
51
+
C201
C200
47u6.3
E-VOL & N.C. & MPX
0-2.6V
MPOUT
QUAL
15
4.7K
Q53
NOISE
BUFFER
C2
+
+
C252
0.47u50
∗
4.2V
4.2V
4.2V
434241403938373635
MDL
CDR
MDR
CREF
IC2
0V or 2.7V or 3.7V
5V
0V
AFS
16
TP116
Q54
Q53
22K
22K
8
83
4.7K
R301
5V
0V
5V
0V
5V
0V
20
0V
31
23
27
SMALL LAMP
DET SW
24
ACC DET
C135560
EX AMP
CONTROL BUFFER
∗
D
Q29
47K
2.2K
R132
26
4.2V
4.2V
SUBL
SUBR
SMUTE
17
LOGIC IC
for MUTING
IC8
1
2
3
4
5
6
7
VSS
C131
Q33
0.01
D14
4.2V
ACOUTL
ACOUTR
181920
TP118
+
1u50
18K
R142
34
ACIN0L
ACIN0R
5V
0V
SDA
SCL
FREER
4.2V
SCL
SDA
TP117
Q54
E-VOL
MUTE SW
VDD
47K
47K
D17
0.01
C134
D15
76
ACIN1R
ACIN1L
ACIN2L
ACIN2R
ACIN3R
ACIN3L
OUTLF
OUTRF
OUTRR
21
4.2V
14
13
12
11
10
9
8
R144
47K
VDD
GND
FREEL
22
4.2V
Q30
C130
3.3K
R143
R134
0.01
C129
OUTLR
5.0V
0.022
1/2W
47K
33
32
31
30
29
28
27
26
25
24
23
R133
100K
R145
100K
R135
4.2V
4.2V
4.2V
4.2V
4.2V
4.2V
8.4V
0V
4.2V
4.2V
4.2V
5V
0V
5V
0V
5V
0V
C15
0.1
∗
C23
1
C22
1
0.01
C251
20
B.U. DET
C213
0.01
R9 33K
C13 0.1
∗
C24
1
C21
1
L6
4.7uH
+
C250
47u16
FR
22K
R138
Q32
R141
8.2K
C132
10K
R140
1000P
10K
R139
D16
21
22
11
R302 220
TH1
470
15
D23
D24
Q51,52
MUTE
DRIVER
R303
22K
C258 1u50
R305
4.3K
9
C31
0.22u50
C34
0.22u50
C256
33u16
+
C255
1u50
+
R307
Q51
22K
22K
Q52
22K
22K
D30
D29
+
7.5K
D31
R306
0V
0-4.4V
14.4V
0V
C257
10
1u50
+
6.8V
0V
14.4V
0V
∗
W1
R10 33K
C16
C14 0.1
0.1
D10
Q24
1K
1/2W
R124 4.7K
R125
Q23
∗
C
15
14
22K
13
D9
Q23,24
P.ANT SW
FR
20
AUDIO POWER IC
IC4
24
PGND4
22
MUTE
20
VCC2
18
PGND3
16
ACGND
6.8V
14
IN4
6.8V
12
IN2
6.8V
10
SVR
8
PGND1
6
VCC1
5V
0V
4
STBY
2
PGND2
22K
R127
1K
1/2W
R126
10K
47K
28
C41
3.3u35
+
C42
+
C49
3.3u35
+
C50
+
3
OUT4-
OUT4+
OUT3-
OUT3+
SGND
OUT1+
OUT1-
OUT2+
OUT2-
D11
R21
360
R223.3u35
360
R45
360
R463.3u35
360
HSD
IN3
IN1
TAB
R131 4.7K
4.7K
4.7K
4.7K
4.7K
Q55,56,59,60
PRE-OUT
MUTE SW
25
23
6.8V
21
6.8V
19
6.8V
17
6.8V
15
6.8V
13
11
6.8V
9
6.8V
7
6.8V
5
6.8V
3
6.8V
1
0V
D12
1K
1/2W
R128
Q55
22K
R23
Q56
22K
R24
Q59
22K
R47
Q60
22K
R48
D38
D37
C33
0.22u50
0V
C32
0.22u50
D35
D36
Q25,
P.C
Q25
+
C126
3.3u35
R130
22K
X34-3042-72 (3/4)
22
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