Kenwood KDC-4551UB/455UW Service Manual page 15

K
9
77
3.3V
5.0V
IC961
HI SIDE
SW
6
3.2V
0V
DC-DC
USB5V
76
L983 D983
5.0V
D982
TP21 L985
L981
R493 C984
22uH
15
IC981
5.2V
D981
1
BST
SW
4.9V 2
EN
R983 C983 FREQ
11.5V 3
COMP
0V
150K 150P
R981 0.8V 4
FB GND
180K
6
12
5
3.3V
M3.3V
C713
0.1
0V
3.2V
0V 0V 3.2V
GND
2
8
7
L
A9V
9
USB5V
FL+B
0.1
0V
8
L982
4.7uH
7
VIN +14.4V
6
0V
5
Q981
0V
0V
0.7V
SW3.3V
2
2
R722
50 3.2V
SW2 (EJECT END) 50
47K
49 3.2V
SW1 49
R726
48 0V
47K
PSW (RST SW) 48
47 0V
AMP MUTE 47
13
46 3.2V
RCA MUTE 46
2
45
NO USE
44 3.2V
HC1-2 44
43
NO USE
42 0V
AMP STBY 42
41 0V
DIMMER
40
IPOD SELECT
R744
39 0V
PNO FL
38
47K
TP14
NO USE
0V
37 SN R742
NO USE
47K
36 0V
DVSS
3.2V
35
DVCC3
34
NO USE
R718
47K
33 3.2V
DC OFFSET DET
(for ST ONLY)
32 0V
PON PANEL
31
REG1-1
3.2V
C714
0.1
2
2
8
uCOM3.3V
7
M
R168
A9V-2
0
9
C172
100u10
+
IC161
5.1V
3.3V
TUNER CD
12
5
13
13
+14.4V
VDD3.3V
ILLUMI
0V
12.4V
Q881
13
0V
7
7
uCOM3.3V
RST
31
7
N
KDC-4551UB/455UW/4651URY
KDC-U449/U5049
10
10
E-VOLUME
REAR FRONT
AUX AUX
3.3V
C166
0.1
10
C160
10u16
+
14
10
10
13
POWER AMP
IC301
10
0V
R302
47K
11
10 10
+14.4V
15
IC901
SW3.3V
3.3V
3.3V
Q951
SW3.3V
0V
TEL
MUTE
C912
0V
R894 0.1
0
C903
Q952
47u16
+
0V
5.0V
uCOM3.3V
L701
4.7uH
3.3V
R746
47K
3.3V
IC702
RESET
0V
X34-691x-xx (3/4)
O
13
LINE MUTE
3.3V
3.3V
3.3V
R783
Q781
100K
Q782
3.3V 0V
D783
FL,FR
10
13
7
6.4V 6.5V
0V
C313
1
15
REGULATOR
R907
R909
1.5M
27K
C905
0.1
C904 C906 7
47u16 100u16
+ +
VDD5V
7
+11.5V
R970
VDD3.3V
47K
C932
3.2V
SW3.3V
330u6.3
+
VDD5V
C931
4.2V
0.1
IC931
0V
C913
4.7V
C933 330u6.3
+
0.1
VDD5V
8
15