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Kenwood Manuals
Car Receiver
KDC-237SA
Service manual
Kenwood KDC-237SA Service Manual page 26
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K
KDC-237SA/237SAY
KDC-237SG/237SGY
5
4
1
10
IC8
TP432
1
OUT
5.0V
10
1
2
VDD
4
5.0V
RESET IC
∗
5V
R201
0V
47K
1
1
LX DATA M
2
2
LX CLK
∗
3
R202
NC
4
5V
100K
NC
0V
5
NC
6
REMO
7
NC
8
BYTE
R203
TP412
9
CNVSS
C202
10K
10
XCIN
18P
X2
32.768kHz
C203
R204
11
XCOUT
22P
10K
12
RESET
13
XOUT
X1
10.000MHz
10
14
VSS
15
0V
XIN
5.0V
16
VCC1
R206 47K
17
NMI
5.0V
R207 47K
18
18
PANEL DET
19
NC
TP413
20
R208
NC
47K
0V
21
ROMCOR DET
22
NC
23
5V
NC
0V
24
24
PON FL
25
5V
NC
0V
26
26
PON PANEL
27
5V
NC
0V
28
PWIC BEEP
R209
470
29
SCL
AUD SCL
R210
30
6
SDA
AUD SDA
470
10
8
10
8
7
SW5V
8
BU5V
24
18
22
20
CN2
23
21
19
CD CN
26
X34-4672-78 (3/4)
L
BU
5
4
1
BU5V-1
10
∗
R229
100K
4
VSS
5.0V
3
NC
5V
0V
5V
0V
5V
1.6V
0V
5V
5V
0V
0V
0V
5V
0V
∗
IC1
SYSTEM u-COM
5V
0V
5V
0V
5V
5V
0V
0V
5V
0V
5V
0V
5V
0V
5V
0V
R335
47K
8
9
7
9
16
14
12
10
17
15
13
11
to X32- CN2
M
BU5V-2
7
TP502
5V
0V
0 or 1.6 or 2.5 or
ACC DET
3.4 or 5.0V
5V
0V
PWIC MUTE
5V
0V
PWIC STBY
5V
0V
PWIC SVR
5V
0V
LX REQ S
5V
0V
RDS CLK
LX REQ M
LX MUTE
5V
0V
ANALOG CON
5V
0V
PON EXT GND
5V
0V
TUN IFC OUT
RDS AFS M
5V
0V
RDS QUAL
5V
RDS DATA
0V
5V
0V
5V
0V
5V
0V
ROTARY CW
5V
5V
0V
ROTARY CCW
0V
5V
CD DISC12 SW
0V
5V
5V
0V
0V
CD MUTE
5V
0V
5V
0V
0V
10
10
BU5V
SW5V
Q8
VFD+B
AVR
4
8
6
2
Q9
9
7
5
3
1
CONTROL
SW for
VFD+B
N
BU
5
4
1
BU5V-1
4
7
1
80
BU DET
79
78
78
77
77
76
75
75
∗
R220
5V
0V
1
100K
74
74
73
73
4
72
∗
72
R219
71
71
100K
LX CON
70
LX RST
70
69
69
68
MUTE
68
R218
R964
67
67
22K
0
66
66
∗
R214
65
65
22K
64
0V
VSS
63
NC
7
62
5.0V
VCC2
61
TP404
61
60
60
59
DSI
59
58
NC
57
57
56
56
55
55
54
8
54
53
NC
52
NC
9
51
NC
9
8
7
AUDIO+B
AM+B
BU5V
7
BU5V
SW5V
SERVO+B
R15
R14
R13
R12
R11
10
10
10
10
10
∗
1/2W
1/2W
1/2W
1/2W
1/2W
Q7
H
∗
∗
R961
W5
ILL &
0
VFD+B
Q8
Q7
Q9
R16
24
680
R952
0
10
O
J1
11
9
10
12
8
7
6
5
5
BU
P ANT
D104
∗
E
P CON
D102
∗
L
LINE MUTE
∗
F
R
1
SW5V
SERVO+B AVR
Q2
Q3
Q1
R1
1K
Q3
CONTROL
SW for
SERVO+B
BU DET
R1
Q103
10
Q10
Q10
BU
T
T
∗
R953
0
T
T
T
TP9
TP30
R9
0
T
C9
0.0
TP28
∗
VFD+B
Q4
SW
BU
CONTROL SW fo
10
KDC-237SA/
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This manual is also suitable for:
Kdc-237say
Kdc-237sg
Kdc-237sgy
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