Acer AL1516, Service Manual

Page: 43 / 48

42
D C
PC5V
R713
NC
C701
NC
X
+5V
R705
4.7K 1/16W
R702
51 1/16W
+5V
+ C703
100uF/25V
R701
1K 1/16W
MMBT3904
+5V
+
C707
100uF/25V
+5V 3,4
P W M
GND
R29
R706 NC
R711
10K 1/16W
4K7
R718
NC/10K
+5V
R720 0 1/16W
C711
0.1uF
Recommond to used "Blue" parts circuit
for VCC1.8V if you want to suppoert DDC
function when system power off
BL_ADJ
+3V3
R708
10K 1/16W
Q706
PMBS3904
0
+5V
R721
0 1/16W
D703
BAT54C
3
1 2
R714
10K 1/16W
GND
+12V 4
PC5V 3
R33
R716
NC
R32
+12V
Q705
AO3401L
C713
0.1uF
U701
NC/LT1117-18
3 2
1
4
VI VO
GN
D VO
R31
VCC5V
D701
1N4148
U702
AIC1084-33PM
3
1
2
4
VIN
ADJ
VOUT
VOUT
1UF
+3V3
+
C710
100uF/25V
BL_ADJ
R703
2K 1/16W
For RSDS and Panel VCC=12V
R719
NC/10K
+
C712
100uF/25V
VCC3.3
+3V3
1UF
R732
10 1/16W
+3V3
+ C719
NC/10uF/16V
+ C702
4.7uF/16V
+5V
R709
0 1/16W
4.7K
+5V 3,4
+5V
POWER
A
TSUM16AK
B
1 5 Monday, May 30, 2005
Title
Size Document Number Rev
Date: Sheet of
1uF
R725
4.7K 1/16W
0V ~ 5V
R710 NC
+ C717
10uF/16V
GND
D702
1N4148
R707
4.7K 1/16W
VCC3.3
+5V
+12V
C708
1uF
4.7K
+12V
+5V
0V ~ 3.3V
C718
0.1uF
+5V
+
C705
1uF/16V
4.7K
R731
NC
R729
NC/10K
C716
0.1uF
R717
10K 1/16W
+5V
47
CN701
CONN
2
4
6
8
10
12 1
3
5
7
9
11
GND
R712 4.7K 1/16W
VLCD_12V 5
+5V
C51
C704
NC
on_Panel 4
H3
TP
1 2 3
4
5
6 7 8
9
1 2 3 4
56
7 8
9
Q703
PMBS3904
C32
R728
NC/4K7
BL_ADJ(DC)
VLCD_12V
Q701
PMBS3904
VCC1.8
Q702
CHT2907
C
B
E
GND
H1
TP
1 2 3
4
5
6 7 8
9
1 2 3 4
56
7 8
9
on_Panel_12V 4
VCC1.8 4
R31
VCC3.3 4
X
+3V3
VLCD 5
R723 51K 1/16W
C714
0.1uF
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).
N.C
C706
0.1uF
GND
SOT-223
Q704
AO3401L
BL_ON
R730
0 1/16W
VCC3.3 4
R715
NC
R722
NC
C720
NC/0.1uF
R727
10K 1/16W
D704
SMAL140
+5V 3,4
X
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.
VCTRL 4
H2
TP
1 2 3
4
5
6 7 8
9
1 2 3 4
56
7 8
9
X
+12V
+5V
Adj_BACKLIGHT
4
R724 51K
C709
0.1uF
1K
+12V
Q707
PMBS3904
VLCD
R726 NC/4K7
R704
100 1/16W
on_BACKLIGHT 4
TO-263
C715
0.1uF
Q4