Kenwood KDC-3028 Service Manual page 23

P
QQ
3 7 63 1515 0
X BUS
9
10
13
11
12
∗
I
D72
IC9
R72
2
SWOUT
4.7K
VIN
14.4V
GND
0V
D73
4
VOS ON/OFF
R73
5.0V 0V or 2.3V
4.7K
MECHA+B
TE
L 13942296513
C93
220u16
+
SERVO+B
BU5V
SW
TP420
Q54
+B
R62
47K
+8V
+5V
0V
Q74
D76
www
FL+B
.
Q
J1
9 10 11 12 13 14
8 7 6 5 4 3
BU
1 14.4V
3 0V
Q91
5
Q71
22K 22K
R92 SERVO+B
47K CONTROL SW
22K
C95
0.22
Q73
D71
C69 0.47
R94
C71
47K 47u16
+
∗
C20
100u16
+
R90 C72
1 10u25
+
∗ ∗
R89 C73
1 10u25
+
TP74
10V
4.5V
TP26
2.0V
5V
2.5V
TP31
0V
TP30
22K
Q74 IC3
CONTROL
SW
x ao
y
R141 R140 R139 R138 R137 R136
2.2 2.2 2.2 2.2 2.2 2.2
i
R
8
F1 10A (F52-0006-05)
15 16
FUSE
2 1
TP9
TP10
C51
3300u16
+
D57
Q Q
3 6 7 1 3
Q72
SERVO+B
AVR
POWER
SUPPLY
IC3
TP71
0V 1
GND
TP72
14.1V 2
P.CON
TP73
14.1V 3
P.ANT
8.0V 4
FM
7.8V 5
AM
8.0V 6
AUDIO
14.4V
7
VCC
5.0V 8
VDD
13.2V 9
VBU
10
SW1
11
SW2
10.2V 12
ILM
u163
R135
2.2
.
KDC-3028/328 (1/2)
S
KDC-3028/328
2 9 9 4 2 8
2SB1565
2SD1858
B
C
E
DTA124EUA
DTC124EUA
DAN202U
1 5 0 5 8 2 9 9 4
CAUTION : For continued safety, replace
safety critical components only with
manufacturer's recommended parts (refer to
parts list).
Indicates safety critical components. To
reduce the risk of electric shock, leakage-
current or resistance measurements shall be
carried out (exposed parts are acceptably
insulated from the supply circuit) before the
appliance is returned to the customer.
m
• DC voltages are as measured with a high
co
impedance voltmeter. Values may vary
slightly due to variations between indi-
vidual instruments or/and units.
X34-3390-1x (4/4)
T
9 9
1
DTA114EE
DTC114YUA
DTC143TUA
2SA1036K
2SA1362
2SA1576A
2SC4617
2
2SC4081
3
UMC2N
DA204U
2 8 9 9
DTA114YUA
4
5
6
7
23