Hitachi L42A404 Service Manual page 25

14. Power
From
R702
Power
1
FB701
Board
C707 R703
C708
47KOHM 10K 1/10W 5%
0.01uF
C703
CN701
220pF
1
P12V
2
12V
3
4
5
6
C709 C710 C711
7
+ +
8
9
10uF/25V 1uF 100uF/25V
10
11
12
P24V 24V
CONN
33G327812D C719 C720 C721
+ +
12P S/T 2.5mm
10uF/50V 1uF 100uF/35V
+5VSB
5V
C728 C729 + C730
100uF/16V
1uF/16V 10U 16V
R749 100R 1/10W 5%
8 PWR_ON
C773
NC
47K 1/10W 5%
R718
PWR_ON
PS_ON
100R 1/10W 5%
BL_ON_OFF 8,10
2
120OHM
BL_BR_CTRL 10
U703
VCC5D D3V3
G1084-33T43Uf
3 2
VIN VOUT
C774 C717 + C713
0.1uF/16V 0.1uF/16V 470uF10V
+5VSB
3V3_STB
3V3_STB R707
R709 NC
NC PS_ON
R733
1K 1/10W 5% R711
Q701
R713 NC NC
Q702
NC NC
R748 100R 1/10W 5%
+5VSB VCC5D
Q703
1 8
S D
2 7
S D
3 6
C746
S D
4 5
R715
G D
0.47uF/16V
47K 1/10W 5% AO4449 -7A/-30V C750 C749
+
R732 0.1uF/16V 470uF10V
0R05 1/10W 5%
R717
33K 1/10W 5%
Q704
MMBT3904
L42A404
+5VSB
FB704
U706 L705 4.7uH
1 2 4 3
VIN LX
300 OHM
C701
C744 C777
R741
1 5
10U 16V 1uF/16V
EN VFB
51K1/10W
R742
G5622ADJT11U
11.3KOHM +-1% 1/10W
VCC5D
FB702
D703
1 2
300 OHM
C718 C723 C724 C725
U704
0.1uF/16V 10U 16V 0.1uF/16V 1uF/16V
SC4524BSETRT
8
BST
7
FB
6
C727 10pF
COMP
5
R721 C748
SS/EN
13K OHM 1/10W 680pF C765
0.01uF
Rework
VCC5D
FB703
1 2
300 OHM
C731 C759 C733 C776
0.1uF/16V 10U 16V 0.1uF/16V 1uF/16V
8
7
6
C735 10pF
5
R706 C737
C740
13K OHM 1/10W 680pF
0.022uF/25V
P12V
U708
3
VIN
C742 C743
+
1uF 10uF/25V
25
3V3_STB
3V3_STB U702
AIC1084-18PE
100pF
3
C767 C705 + C702 C778
22uF 0.1uF/16V 220uF 10V 10uF 10V
C775
10U 16V
LL4148
C726
73G253S 46 B
330NF50V L704
1
SW
2
4.7uH
IN
3
ROSC
4
ZD702 C766
GND
SM340A 0.001uF
R735 R1
R737
15K 1/10W 5%
24K OHM 1% 1/10W
Vout = 1.0x(R1+R2)/R2
R738
R2
Rework 30KOHM1/10W
D701 LL4148
U707 C734
73G253S 46 B
SC4524BSETRT
330NF50V L701
1
BST SW
2
4.7uH
FB IN
3
COMP ROSC
4
ZD701
SS/EN GND
SM340A
R708 R1 R712
15K 1/10W 5% 24K OHM 1% 1/10W
Vout = 1.0x(R1+R2)/R2
R714
R2
Rework 180K 1/10W 1%
5VT
L707 4.7uH
2
VOUT
C768 C772 C745
+ + +
100uF/25V 10uF/25V
220uF10V
1V8_STB
2
IN OUT
C706 C704
+
0.1uF/16V 470uF10V
D1V8
C779
C761 C762 + C763
10uF 10V
0.1uF/16V 22uF 470uF10V
VCC1V1
C780
C741 C738 C739 + C736
10uF 10V
0.001uF 0.1uF/16V 22uF 220uF 10V
12 P24V
10,12,13,15 P12V
6,12,13 +5VSB
4,5,6,7,11,13 VCC5D
3 5VT
5,7,8,10 3V3_STB
3,4,6,7,8,10,13 D3V3
8,9,10 D1V8
8,10 VCC1V1