Acer AL1917

44
R729
NC/10K
Recommond to used "Blue" parts circuit
for VCC1.8V if you want to suppoert DDC
function when system power off
D704
SMAL140
+
C702
4.7uF/16V
VLCD_12V
+5V
+5V
GND
SOT-223
R31
+
C710
100uF/25V
on_Panel4
+12V
R719
NC/10K
+5V
+
C707
100uF/25V
VLCD 5
1UF0V ~ 5V
C32
C718
0.1uF
VCC1.8
+5V
C51
U701
NC/LT1117-18
3 2
1
4
VI VO
GND
VO
Q703
PMBS3904
H1
TP
1 2 3
4
5
6 7 8
9
1 2 3
4
5
6 7 8
9
47
+12V
H3
TP
1 2 3
4
5
6 7 8
9
1 2 3
4
5
6 7 8
9
R704
100 1/16W
+
C712
100uF/25V
R713
NC
VCC3.3 4
1uF
+5V
+5V3,4
4.7K
U702
AIC1084-33PM
3
1
2
4
VIN
ADJ
VOUT
VOUT
R705
4.7K 1/16W
R709
0 1/16W
VCC1.8 4
+12V
GND
C704
NC
C708
1uF
R32
+5V
VLCD_12V 5
R31
+5V
C720
NC/0.1uF
R706
NC
+3V3
+5V
R725
4.7K 1/16W
R701
1K 1/16W
+ C717
10uF/16V
4.7K 0
+3V3
R718
NC/10K
R712 4.7K 1/16W
Q702
CHT2907
C
B
E
TO-263
BL_ON
VCTRL 4
POWER
A
TSUM16AK
B
15Monday, May 30, 2005
Title
Size Document Number Rev
Date: Sheet
of
R711
10K 1/16W
R728
NC/4K7
Q704
AO3401L
1UF
BL_ADJ
+5V3,4
R29
R726 NC/4K7
R721
0 1/16W
D702
1N4148
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.
R730
0 1/16W
R708
10K 1/16W
R703
2K 1/16W
R33
P W M
4K7
X
+12V
PC5V 3
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).
C709
0.1uF
+
C705
1uF/16V
GND
R723 51K 1/16W
MMBT3904
CN701
CONN
2
4
6
8
10
12
1
3
5
7
9
11
D C
12/21 MODIFY
VLCD
+3V3
+
C703
100uF/25V
1K
C714
0.1uF
R727
10K 1/16W
R731
NC
Q4
C713
0.1uF
C706
0.1uF
D701
1N4148
X
VCC5V
BL_ADJ
R717
10K 1/16W
R724 51K
R710 NC
+5V
+5V
R716
NC
R707
4.7K 1/16W
+3V3
X
Q706
PMBS3904
Q701
PMBS3904
+5V3,4
+
C719
NC/10uF/16V
C716
0.1uF
+5V
PC5V
VCC3.3
X
R732
10 1/16W
C711
0.1uF
on_Panel_12V4
+12V 4
+5V
+5V
on_BACKLIGHT 4
GND
R715
NC
D703
BAT54C
3
1 2
BL_ADJ(DC)
Q705
AO3401L
+3V3
VCC3.3
Q707
PMBS3904
C701
NC
R720 0 1/16W
0V ~ 3.3V
+12V
R722
NC
H2
TP
1 2 3
4
5
6 7 8
9
1 2 3
4
5
6 7 8
9
VCC3.3 4
For RSDS and Panel VCC=12V
4.7K
C715
0.1uF
Adj_BACKLIGHT
4
GND
GND
R702
51 1/16W
R714
10K 1/16W
N.C