Kenwood KDC-348U Service Manual page 28

A
KDC-348U/4751SD/BT41U/BT648U
/U4549/U4549SD/U549BT/X395/X695
1
ELECTRIC UNIT
(X34-69xx-xx)
2
ANT.
TP65
W551
1
2
3
3
TP128
TUN
GND
L551
4
5
6
7
28
X34-696x-xx (1/6)
B
∗
H MIC I/F
J921
TP643
TP642
D922
D921
10
∗
R518
0
Q708
∗
L509
MUTE
DRIVER
for
PRE-OUT
R513
680K
10
R514
680K
10
C532 L508
TUNER UNIT
0.47uH
6P
ATOMIC
RDS
∗
IC501
FM : 0V
AM : 2.9V 1 FM : 0V
AMRFIN
AM : 4.1V
C524
2
AMRFDEC
0.22
FM : 1.5V
3.2V 3
AM : 3-5.5V
FMIN2
3.2V 4 FM : 0V
FMIN1
AM : 1.6V
0V 5
GNDRF
8.5V
6
VCC2
FM : 0.4V
C502
7
AMRFAGC AM : 1.8V
1 TP501
C509 8
TU-L LOUT
1
TP502
C510 9
TU-R ROUT
1
0V 10 FM : 0.4V
GNDAUD
AM : 3.7V
C505
11 11
AMIFAGC2
3.6V 12
0.22
MPXIN
3.8V 13
MPXOUT
TP503
14
C507
RSSI
9P
15
XTAL2
X501
16
XTAL1
4.000MHz
A8V-1
11
11
C
PRE OUT
∗
J701
REAR/SUB FRONT
∗ ∗
C715 C716 C713 C714
1000P 1000P 1000P 1000P
R715 R716 R709 R710
22K 22K 22K 22K
Q705 Q706 Q703 Q704
Q708 Q707
D702
Q707
MUTE DRIVER
for PRE-OUT
108
SW3.3V
∗
K
FM : 8.5V
AM : 6.8-8.5V
L502
6
560uH
32
AMSELOUT2
7
L503
31
8
AMSELOUT1
560uH
C511
30 9
AMIFAGC1
10
C512 1
29
AMSELIN2
28 0.01 C513
AMSELIN1
27
0.01
C514
TEST
2.2V
0.01
26
PLLREF
TP513
R505 C515
0.5V
4.7K 0.1
25
PLL
C516
5.7V
0.01
24 C517
VCODEC
0.1
23 0V
GND
8.5V
22
VCC1
8
TP518
7.2V
11
21
VREGSUP
20 3.9V C520
VREF
0.1
TP514
R507
220
19
SDA
TP515
R508
220
18
SCL
17 0V
GNDD
TP510
A8V-1
R515
3.3K
TP509
R516
3.3K 11
8
8
11
D
R L
REAR
FRONT
REAR/SUB
F719
PATTERN
FUSE3
∗ ∗
G F
REAR
C711 C712
1000P 1000P
R703 R704
22K 22K
Q701 Q702
D701
9
Q701-706
PRE OUT
9
MUTE SW
BU3.3V
2 2
10
R263
iPod
33K
AUTHENTICATION IC
C261
0.1
3.3V
3.3V
20
NC6 NC20
3.3V 19
NC7 NC19
0V
18
NC8 NC18
IC261
17
NC9 NC17
16
NC10 NC16
0V
R267 3.3K
SDA
R266 3.3K
SCL
5
11 11
8 5 8
13
SW3.3V
L501
A8V
4.7uH
4
13
∗
R316
47K
∗
R317
47K
D502
∗
R319
2.2K
∗
R318
C541
2.2K
1000P
23 21 19
24 22 20
E
∗
E
R610
4.7K
IC601
1
VC
2
3
4
5
6
7
GND
0V
3.3V to
1
9
10
∗ ∗
R926
0
13
A8V
4
∗
R322
100K
∗
R321
100K
17 15
18 16 14