19
KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY
KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G
J
I
H
G
F
10K
47K
0V
3.9V
3.4V
0V
2.4V
0.8V
8.0V
0V
3.2V
8.0V
8.0V
0V
3.0V
3.9V
3.9V
3.9V
3.4V
4.8V
0V
2.2-4.5V
3.0V
3.0V
3.0V
3.0V
3.0V
3.0V
5.0V
0V
0.6-4.1V
3.0V
3.0V
3.0V
3.0V
3.0V
3.9V
5.0V
0V
0V
5.0V
0V
5.0V
5.0V
0V
0V
5.0V
0-4.0V
0V
5.0V
5.0V
5.0V
0V
0V
5.0V
TUNER
CHANGE
AM
FM
PW-ON
AM
2.0V
3.2V
0V
0V
FM
2.6V
0V
AM
2.0V
FM
0V
AM
FM
5.0V
0V
3.7V
FM
1.4V
1.2V
0V
4.0V
4.2V
4.2V
8.0V
0V
7.3V
0V
7.3V
7.4V
0V
7.2V
7.2V
7.3V
7.3V
7.2V
0V
4.9V
14.4V
0V
7.2V
7.2V
7.2V
5.0V
0V
3.0V
1.9V
5V
0V
4.0V
FM
0V
0V
5V
0V
4.2V
2.4V
0V
5V
4.4V
0V
5.0V
0V
5.0V
0V
0V
5.0V
0V
5.0V
5.0V
0V
0V
0V
5.0V
5.0V
0V
5.0V
0V
or 0V
5.0V
0V
0V
5.0V
0V
5.0V
5.0V
0V or 5.0
7.4V
7.4V
0V
0V
0V
5.0V
0V
3.4V or
14.4V
7.3V
0V
4.1V
0V
5.0V
0V
5.0V
0V
0V
0V
5V
5V
0V
5.0V
0V
0V
IC10
∗
IC4
IC8
IC11
∗
IC1
IC12
E-VOL.
TUNER &
D201
D202
CONTROL
u-COM
SYSTEM
D263
D265
D268
D264
D262
D266
∗
Q251
D40
D101
RESET
POWER
SMETERRC &
MPTHTC SW
∗
Q253
ON
∗
Q252
AMPLIFIRE
POWER
D267
D261
∗
F
LOGIC
MUTE
D253
D251
D252
E2P-ROM
D20
Q70
DETECTOR
A. C. C
Q20
DETECTOR
B. U.
Q10
D70
DETECTOR
SURGE
D10
FMMUTETC
39
L516
4.7uH
C551
0.01
L515
4.7uH
100P
C560
26
25
L514
4.7uH
PLL
VCC
38
37
36
35
34
33
32
31
30
29
28
27
C554 0.1
C552
C593
0.01
10.250MHz
∗
C553
1
X501
C562
10u10
C561
1u50
RR
RL
FR
C556
1000P
DEVTC
TUNQ
U
ALITY
DIGVCC
DIGGND
XT
ALD
XT
ALG
ISSTC
OUTFR
OUTRL
OUTRR
APVCC
APGND
VREF3V
SCL
SD
A
13
12
11
∗
R413 100K
4.194MHz
2.2K
45
40
FL
W501
A
CRIN
OUTFL
ACROUT
ACLIN
ACLOUT
IN2L
IN2COM
42
41
45
44
43
44
∗
W578
77
IN2R
IN1R
IN1COM
C204
46
46
47
47
2.2u50
C565
47u10
48
TUNERIN
IN1L
TUNEROUT
49
49
C205
2.2u50
R561
C564
0.47
50
51
∗
C568
2.7K
R133 12K
∗
R134
∗
C106
R132
2.2K
51
C105
15P
X1
77
∗
R102
1
2
4
3
2
1
R104
R103
1K
R106 100K
1K
5
6
1K
9
8
7
6
5
11
10
N.C
AVCONT
80
A
VSS
N.C
8EJE SW
P
ANEL
PHONE
NOISE
79
78
N.C
A
VREF1
L-CE
L-RST
L-D
A
T
A
L
AC
L
AD
A
R107 2.2K
R121 2.2K
R105 470
14
15
14
13
12
15
L-CLK
L-D
A
T
A
S
R-Q
U
A
L
R-D
A
T
A
VDD0
S-METER
AVREF0
76
75
IC
XT1
XT2
74
73
72
X1
71
70
19
17
15
13
11
9
7
5
3
C583 0.1
10.700MHz
W511
FMDEMREF
FMDEM AMIF2AMP REF
AMIF2AMPIN
AMA
GC2TC
AMMIX2OUT
AMMIX2IN2
FMAMP2OUT
FMIF
AMP2IN
70
∗
CF53
71
CF52
C584
4.7u16
L509
AMMIX2IN1
68
69
67
DEMGND
SMETERC
64
65
66
61
62
63
10.700MHz
4.7K
0.01
C585
W509
GND
OUT
IN
3
2
1
450kHz
CF54
C588
0.47
C586
∗
C587
W510
0.1
∗
R253
∗
W408
∗
R252
∗
W407
C253
22u50
C252
22u50
4.7K
RR-
FR-
RR+
FR+
FL-
FL+
∗
C256
0.22u50
0.22u50
W156
14
12
10
8
6
4
2
OUT2-
TA
B
1
OUT1-
OUT2+
STBY
PGND2
SVR
PGND1
VCC1
SGND
IN1
OUT1+
OUT3-
OUT3+
IN3
IN4
IN2
∗
R256
∗
W406
∗
W405
∗
R254
1K
4.7K
∗
R251
4.7K
C255
1u50
41
W162
C254
C251
40
25
23
21
R126
100K
59
57
58
56
55
54
50
C103 0.1
∗
C589
58
1K
54
SDA
SCL
C563
0.47u50
R565 100K
52
R566
1K
53
SCL
SDA
SD
SMETER
QUALITY
AUDIOMUTE
R567
W517
55
55
W519
56
57
C104
15P
R131
6.8K
R130 2.2K
66
57
∗
R414 100K
R129 2.2K
64
61
63
62
RDSMUTE
MPTHTC
59
60
59
Q252,253
0.1
V
OUT
R128
2.2M
61
R127
2.2K
VSS
60
NC
4
3
VDD
1
2
R123
1K
KEY-REQ
68
X2
VDD1
69
Vss0
CD-SW2
67
66
CD-SW1
65
64
CH-REQC
R-CLK
63
62
50
58
M-MUTE
RESET
REMO
61
59
60
CD-SW3
MOSW
LO/EJ
M-ST
OP
M-RST
55
56
57
DSI
N.C
N.C
51
52
53
54
CP3
1Kx2
R125 1K
R122 100
2.2Kx2
CP2
PS1-2
PS2-0
47
PS2-1
BEEP
48
49
PS1-1
45
46
R69 10K
R68 10K
∗
R67 10K
CP1
10Kx2
0.01
∗
C590
0.1
∗
C592
100u6.3
C102
0.01
C101
12
RL-
RL+
∗
C404
0.01
8
1
R415
100K
2
1
5
4
3
VCC
L101
4.7uH
C40 0.01
GND
6
7
100K
100K
R23
R12
R563
ACL
∗
R260
750
∗
W409
2
24
22
20
18
16
A
CGND
OUT4-
OUT4+
HSD
PGND3
VCC2
PGND4
MUTE
C258
1u50
∗
R258
R201 47K
13
14
10
9
11
12
4
3
5
SDA
R564
10K
SCL
6
GND
A2
A1
ADA
∗
R263
∗
R261
C257
1u50
50
39
470
TH1
R257
6.2K
W158
1
35
WP
VCC
7
8
A0
R71
8
SDA
10K
SCL
C21
0.01
R22
10K
R11
10K
R72
36K
R73
100K
82K
3.3K
1/2W
R21
33K
R20
R10
30K
+
+
+
+
+
+
+
+
+
+
+
+
X34-3102-7x (2/4)