Kenwood KDC-3028 Service Manual page 22

K
KDC-3028/328
QQ
3 7 63 1515 0
S-METER
TP408
C565
1
5V
0V
TUN SMETER
5V
5V
0V
RDS NOISE
0V
4V TYPE 1
5V
1.6V
TYPE 2
0V
0.4V
TYPE 3
5V
0V
3.4V AVDD
0V
VDD0
XT1
4.0V
0V
∗
XT2
IC1
SYSTEM u-COM
TEST
X1
X2
5V
0V VDD1
5V
VSS0
5V
0V
0V
LX REQ S
5V
5V
0V REMOTE
0V
RDS CLK
5V
0V KEY REQ
PON FL
TE
L 13942296513
PANEL DET
5V
0V
www
4 12 10 8 6 4
13 11 9 7 5 3
ER UNIT (X32- )
22
X34-3390-1x (3/4)
L
TP404
∗
R471
∗
10K
R470
79
2.2K
80
TP411
79
78
77
76
75 5.0V
74 5.0V
C407 C422
22P
73
100P
R457
72
C408
10K
18P
W365
71 0V
70
69
X1
10.0MHz
68 5.0V
67 0V
∗
R480
66
65
100K
∗
65
W57
64
64
63
63
62
62
61
D402
R441
47K
IC8
TP432
5.0V
C409
0V
47u6.3
+
60
C410
0.01
RESET
PANEL
TP376
DET
IC15
2
1
VCC
CTL
14.4V
5V
0V
3
GND
4
OUT
0V
5 11.4V
NC
1.4V
C97
2
22u16
LED & VFD+B
1
+
R100
x ao
2.7K
. i
M
X89-269-
CN91
a
∗
WH1
1 2 3 4 5
TP341
Q351
Lch
PRE OUT
MUTE
SW
Q352
Rch
PRE OUT
MUTE
SW
2
R52 R51
39K 68K
R53 SERGE
DET
100K
D55
Q51
Q Q
3 6 7
BU DET
BU
∗
IC4
POWER IC
∗
B
∗
W251
R273
470K
R252
47K
Q252
IC4
STBY
SW
u163
y
N
2 9 9 4
8
∗
REAR E
L R
J6
TP339 TP338
TP340
∗ ∗
C333 C334
680P 680P
R335 R336
30K 30K
Q351 Q352
Q330
22K
22K
Q330
Q351/352
MUTE DRIVER
ACC
R58 3.3K
1/2W
R82
22K
C81
R60
0.01
ACC
R83
DET
10K D81
47K
LINE
C55
Q53
MUTE
0.01 R61
1 3 1 5 0 5 8 2 9
22K
R57 22K
Q52
5V 6.8V
4.5V
0V 0V
0V
4.8V
7.0V
6.9V
6.9V 7.0V
14.4V
∗ ∗
W252 W346
m
co
.
O
2 8
9 9
LX BUS
J2
1 5 9
2 6 10
13
3 7 11
4 8 12
D72
R72
4.7K
D73
R73
∗
W51
4.7K
9 4 2 8 9 9
∗
B
TP315