Electric Unit - Kenwood KDC-3025 Service Manual

K
KDC-3025/325/5026/G
1

ELECTRIC UNIT

(X34-3090-xx)
LX-CN
C306
0.01
2
J4
ANT
L3
3
∗
A1
1
RF GND
2
FMIN
3
AMIN
4
OSCGND
5
N. C
6
AM+B
7
OSCGND
8
OSCGND
9
N. C
10
OSCGND
11
VT
12
PLL+B
13
IFCOUT
4
14
SDA
15
SCL
16
D-GND
17
VDD5V
18
N. C
19
N. C
20
AUDIO
21
N. C
22
S-METER
23
IF+B
24
IF GND
5
∗ ∗
R374
CN4
1K
1
C119
0.01
2
WIRED
REMO
Q101
53
52
6
C117
2.2U50
0V
C118 680P
P1
7
18
X34-3090-xx (1/3)
L
J2
1 5 9
GND
2 6 10
13
3 7 11
BU
4 8 12
FM/AM
TUNER
IC2
ELECTRONIC
VOLUME &
FM MPX
DETECTOR
R101
1K
51
R102
470
30
R104
470
29
C111 1000P
R106
2.2K
93
∗
D
RDS
DEMODULATOR
5.0V
IC7
0V
5.0V
R113 2.2K
1
0V
QUAL
R114
R112 2.2K 2.2K
2 16
RDDA RDCL
15
5.0V R115 C112
TCON
0V 2.2K 27P
14
OSCO
C113
2.5V
3 27P
13
VREF
OSCI
+
2.5V
4 4.332MHz
MPX
5.0V 5
12 5.0V
VDDA
VDDD
11 0V
VSSD
6 10 0V
VSSA SYNC
9 0V
2.5V 7
MODE
CIN
0V 8
SCOUT
M
FR
3
F GND
2
FL
1
FRONT
CN3
1 2 3
∗
C
R361 R362
22K 22K
C357
0.01
Q355 Q356
C356
0.01
MUTE
SW
E2P-ROM
IC10
C211
47u10
8
1
+ VCC
A0
7
2
WP
C210
A1
0.01
3 6
A2 SCL
4 5
GND SDA
5.0V
0V
5.0V
0V
D157
D152
D158
D153
D154
D160
D155
D161
D162
18 17 16 15 14 13 12 11 10
CN1
N O
PRE OUT
REAR
J3
R355 R356
22K 22K
Q351 Q352
MUTE
MUTE
SW
SW
Q354
R210
10K
R205
Q201
2.2K
R209
94
10K
3.6V
0.3-3.5V
0V
4.0V
4.8V
R203
4.7K
R165
47K
C164
Q152
10u16
+
PANEL
5V SW D163
9 8 7 6 5 4 3 2 1
5.0V
IC6
MUTE
DRIVE
Q151 Q153
47K 47K
10K 47K
DSI ILL.
DRIVER CONTR
R187
47K
Q154
S1
PANEL
DET. SW
R
C163 R
0.01 4