Service manual
17" LCD Color Monitor AOC 177S
17
R710 NC
Q706
PMBS3904
R31
R705
4.7K 1/16W
Q702
CH T2907
C
B
E
For RSDS and Panel VCC=12V
Q705
AO3401L
VLCD 5
+
C707
100uF/25V
X
4K7
+5V
+5V
R709
0 1/16W
1K
R713
NC
R719
NC/10K
VCC3.3 4
C713
0.1uF
C706
0.1uF
R29
GND
D704
SMAL140
+5V3,4
+5V
C715
0.1uF
R32
Q708
PMBS3904
R714
10K 1/16W
+12V 4
C32
H3
TP
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
Q709
NC/PMBS3904
R724 51K
C714
0.1uF
VCTRL 4
R737 NC/4K7
R733
NC
+3V3
+5V
R711
10K 1/16W
+5V
C704
NC
R717
10K 1/16W
X
+5V
Q701
PMBS3904
X
+12V
H1
TP
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
D703
BAT54C
3
1
2
C708
1uF
Q703
PMBS3904
+5V
P.S: The 1N4148 Vf=0.7V~1V can't meet
LDO spec. The BAT42, Vf is OK but the
If=200mA(forward current) can not
meet current spec.
0
+3V3
+5V
+12V
BL_ADJ
R730
0 1/16W
+3V3
47
VCC3.3
R723 51K 1/16W
D701
1N4148
GND
+
C705
1uF/ 16V
on_Panel4
0V ~ 3.3V
VCC5V
BL_ON
C718
0.1uF
C711
0.1uF
R722
NC
TO-263
4.7K
+5V
+5V
Q704
AO3401L
4.7K
Q707
NC/PMBS3904
C722
NC/0.1uF
U701
NC/LT1117-18
3 2
1
4
VI VO
GND
VO
GND
C709
0.1uF
R731
NC
VLCD_12V 5
BL_ADJ
Adj_BACKLIGHT
4
MMBT3904
+
C719
NC /10uF/16V
+12V
+5V
VLCD_12V
715G1558.DSN
B
Power
Custom
36Saturday , Nov ember 12, 2005
Tit le
Size Document N umber Rev
Date: Sheet
of
R721
0 1/16W
+5V
R704
100 1/16W
0V ~ 5V
R727
10K 1/16W
GND
R715
NC
4.7K
VCC3.3 4
R735
4.7K 1/16W
C701
NC
R726 NC/4K7
H2
TP
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
R703
2K 1/16W
P W M
+5V
R734
10K 1/16W
Q4
R712 4.7K 1/16W
VCC1.8
R707
4.7K 1/16W
R732
10 1/16W
+
C712
100uF/25V
VLCD
+3V3
R708
10K 1/16W
+
C702
4.7uF/16V
1UF
+3V3
VCC3.3
+12V
+
C710
100uF/25V
R33
+12V
R729
NC/10K
C720
NC/0.1uF
R725
4.7K 1/16W
C51
GND
C716
0.1uF
+
C717
10uF/16V
N.C
BL_ADJ(DC)
U702
AIC1084-33PM
3
1
2
4
VIN
ADJ
VOUT
VOUT
C721
0.1uF
R716
NC
+5V3,4
D C
R720 0 1/16W
R728
NC/4K7
VCC1.8 4
+
C703
100uF/25V
+5V3,4
X
SOT-223
PC5V 3
CN701
CONN
2
4
6
8
10
12
1
3
5
7
9
11
R718
NC/10K
1uF
R736
NC/10K
on_Panel_12V4
R31
GND
R701
1K 1/16W
R706
NC
Recommond to used "Blue" parts circuit
for VCC1.8V if you want to suppoert DDC
function when system power off
on_BACKLIGHT 4
PC5V
R702
51 1/16W
1UF
D702
1N4148
D704(SSM12L) Vf=0.38V and If=1A.
So when system power on, the
system loading is about 400mA
(3.3V is about 200mA and 1.8V is
about 200mA), So D35 changed
from 1N4148(or BAT42) to
SSM12L(schottky diode).