![AOC 177sa Service Manual Download Page 19](http://html.mh-extra.com/html/aoc/177sa/177sa_service-manual_2949581019.webp)
17" LCD Color Monitor
AOC 177Sa
19
TSUM56AK
R716
NC
R720
0 1/16W
R704
100 1/16W
R32
1UF
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.
VLCD 5
For RSDS and Panel VCC=12V
C704
NC
Q701
PMBS3904
VLCD_12V 5
+3V3
+3V3
Adj_BACKLIGHT
4
+5V
3,4
PC5V 3
PC5V
BL_ADJ(DC)
C32
C718
0.1uF
+5V
X
+5V
R715
NC
TO-263
+3V3
+
C707
100uF/25V
C715
0.1uF
GND
+5V
H1
TP
1 2 3
4
5
6
7
8
9
1 2 34
56
7
8
9
R725
4.7K 1/16W
+12V
Q705
AO3401L
1K
+3V3
R726 NC/4K7
C708
1uF
+
C710
100uF/25V
POWER
A
B
1
5
Monday , May 09, 2005
Title
Size
Document Number
Rev
Date:
Sheet
of
+12V
R732
10 1/16W
R31
R705 4.7K 1/16W
+3V3
VCC1.8 4
X
+5V
CN701
CONN
2
4
6
8
10
12
1
3
5
7
9
11
0
C714
0.1uF
+12V
+5V
VLCD
+5V
H3
TP
1 2 3
4
5
6
7
8
9
1 2 34
56
7
8
9
R722
NC
1uF
Q707
PMBS3904
on_BACKLIGHT 4
P W M
D702
1N4148
MMBT3904
VCTRL 4
4.7K
R729
NC/10K
+5V
3,4
+5V
C51
C709
0.1uF
GND
4K7
+5V
C720
NC/0.1uF
U702
AIC1084-33PM
3
1
2
4
VIN
ADJ
VOUT
VOUT
R721
0 1/16W
VCC3.3 4
R707
4.7K 1/16W
VLCD_12V
VCC1.8
R713
NC
+
C702
4.7uF/16V
R723 51K 1/16W
+
C717
10uF/16V
R714
10K 1/16W
GND
VCC3.3 4
C713
0.1uF
+5V
GND
R730
0 1/16W
+5V
R710
NC
D C
Q703
PMBS3904
Recommond to used "Blue" parts circuit
for VCC1.8V if you want to suppoert DDC
function when system power off
0V ~ 3.3V
C716
0.1uF
R703
2K 1/16W
+5V
R706 NC
Q706
PMBS3904
1UF
VCC5V
C701
NC
+
C703
100uF/25V
4.7K
R717
10K 1/16W
N.C
R29
R708
10K 1/16W
+12V
R701
1K 1/16W
47
R728
NC/4K7
+
C705
1uF/16V
D704
SMAL140
on_Panel_12V
4
X
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).
C711
0.1uF
VCC3.3
BL_ADJ
R731
NC
R709
0 1/16W
R724 51K
+12V 4
+5V
3,4
D701
1N4148
+12V
SOT-223
X
12/21 MODIFY
C706
0.1uF
on_Panel
4
R719
NC/10K
R712
4.7K 1/16W
D703
BAT54C
3
1
2
+5V
+
C719
NC/10uF/16V
+
C712
100uF/25V
R727
10K 1/16W
BL_ADJ
R702
51 1/16W
H2
TP
1 2 3
4
5
6
7
8
9
1 2 34
56
7
8
9
0V ~ 5V
R33
BL_ON
GND
GND
R711
10K 1/16W
U701
NC/LT1117-18
3
2
1
4
VI
VO
GN
D VO
Q4
Q702
CHT2907
C
B
E
+5V
R718
NC/10K
4.7K
R31
Q704
AO3401L
VCC3.3
Summary of Contents for 177sa
Page 12: ...17 LCD Color Monitor AOC 177Sa 12 4 4 3 Optical Characteristics ...
Page 26: ...17 LCD Color Monitor AOC 177Sa 26 7 PCB Layout 7 1 Main Board 715G1558 2 2 ...
Page 27: ...17 LCD Color Monitor AOC 177Sa 27 ...
Page 28: ...17 LCD Color Monitor AOC 177Sa 28 ...
Page 29: ...17 LCD Color Monitor AOC 177Sa 29 7 2 Audio Board 715G1841 1 ...
Page 30: ...17 LCD Color Monitor AOC 177Sa 30 7 3 Power Board 715G1823 2 ...
Page 31: ...17 LCD Color Monitor AOC 177Sa 31 ...
Page 32: ...17 LCD Color Monitor AOC 177Sa 32 7 4 Key Board 715G1819 1 2 ...
Page 42: ...17 LCD Color Monitor AOC 177Sa 42 10 Monitor Exploded View ...