AOC I-INC AH191D, Service Manual, Page: 24 / 59

19" LCD Color Monitor I-INC AH191D
24
+
C712
100uF/25V
adj_BACKLIGHT
4
Q701
PMBS3904
R728
NC
L701
120 OHM
1 2
4.7K
C714
0.1uF
VCC3.3 4
R723 51K 1/16W
C724
NC
+3V3
R720
NC
R730
NC
C51
+
C717
22uF/50V
C709
0.1uF
H1
TP
1 2 3
4
5
6 7 8
9
1 2 34
56
7 8
9
R731
NC
BL_ADJ
C713
0.1uF
0V ~ 3.3V
1uF
del
0V ~ 5V
R706 NC
C706
0.1uF
Q704
AO3401L
R705 4.7K 1/16W
Q707
NC
R708
10K 1/16W
on_PANEL
4
BL_ADJ(DC)
del
R703
2K 1/16W
Q702
PZT2907A
R701
1K 1/16W
X
+5V
+ C723
22uF/50V
VCC3.3 4
+
C710
100uF/25V
on_PANEL_12V
4
+5V
VLCD_12V
R716
NC
SOT-223
Q705
NC 1
3
2
R722
NC
47
+5V
GND
R736
NC
R711
10K 1/16W
R740
NC
H2
TP
1 2 3
4
5
6 7 8
9
1 2 34
56
7 8
9
+5V 3,4
+5V
Q708
PMBS3904
R721
0 1/16W
C32
X
C727
0.1uF
X
R739
1K 1/10W
+5V
+5V
GND
Q709
PMBS3904
U701
NC/LT1117-18
3 2
1
4
VI VO
GN
D VO
Recommond to used "Blue" parts circuit
for VCC1.8V if you want to suppoert DDC
function when system power off
+5V
R710 NC
R31
Q706
PMBS3906
Q4
For LVDS PANEL
VCC1.8
1K
+5V
VCC3.3
+ C704
22uF/50V
+
C702
22uF/50V
N.C
GND
MMBT3904
GND
X
+12V
C715
0.022uF
VLCD_12V 5
R735
4.7K 1/16W
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.
R29
VLCD 5
715G1558-C-BJ.DSN
A
Power
Custom
3 5 Friday , July 21, 2006
Title
Size Document Number Rev
Date: Sheet of
R717
10K 1/16W
R702
51 1/16W
R33
+12V
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).
0
+3V3
R724 51K
H3
TP
1 2 3
4
5
6 7 8
9
1 2 34
56
7 8
9
R733
NC
D702
SMAL140
D C
D704
SMAL140
C716
NC
+5V
L702
120 OHM
1 2
R727
NC
VCTRL 4
+3V3
VLCD
C711
0.1uF
TO-263
+12V
R737 NC/4K7
R32
R734
10K 1/16W
D701
SMAL140
P W M
R712 4.7K 1/16W
R707
4.7K 1/16W
Q703
PMBS3904
C701
NC
BL_ON
4K7
1UF
R704
100 1/16W
1UF
BL_ADJ
GND
+
C703
NC
U702
AIC1084-33PM
3
1
2
VIN
ADJ
VOUT
+
C719
NC
R719
NC
+12V
+5V
4.7K
C722
NC
+5V 3,4
C708
1uF
on_BACKLIGHT 4
R31
+5V
GND
R729
NC
CN701
CONN
2
4
6
8
10
12
1
3
5
7
9
11
C721
0.1uF
VCC3.3
VCC1.8 4
For RSDS and Panel VCC=12V
+
C707
100uF/25V
+3V3
+12V
4
4.7K
http://www.wjel.net