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19" LCD Color Monitor
+5V
C701
NC
+12V
C706
C707
+
0.1uF
100uF/25V
+5V
3,4
+5V
C710
C709
+
0.1uF
100uF/25V
4
Adj_BACKLIGHT
+3V3
R716
R717
10K
NC
R725
4
on_Panel
4.7K
SOT-223
U701
+3V3
NC/LT1117-18
3
2
VI
VO
4
VO
C703
+
C704
100uF/25V
NC
BL_ADJ(DC)
R31
C51
R32
R29
R33
Q4
0V ~ 3.3V
4.7K
1UF
0
X
X
X
0V ~ 5V
4.7K
1UF
X
1K
4.7K
MMBT3904
BL_ADJ
R31
C32
P W M
47
N.C
D C
4K7
1uF
+5V
R708
+12V 4
CN701
10K
1/16W
GND
1
2
BL_ON
R710
GND
3
4
BL_ADJ
+12V
5
6
+12V
GND
7
8
GND
C711
+5V
9
10
+5V
R712
GND
GND
11
12
0.1uF
Q703
PMBS3904
CONN
VCC5V
R701
1K
1/16W
R706 NC
R705 4.7K
1/16W
Q701
C708
PMBS3904
1uF
R707
4.7K
1/16W
+3V3
+5V
VLCD
VLCD 5
+5V
+3V3
R714
R715
10K
1/16W
NC
1/16W
R721
Q704
R723 51K
1/16W
AO3401L
0
1/16W
Q706
1/16W
C715
PMBS3904
C718
0.1uF
+
C717
R727
0.1uF
10uF/16V
10K
1/16W
H1
H2
+3V3
9
5
9
5
9
9
5
9
5
4
4
4
4
TP
TP
+5V
NC
R711
10K
1/16W
4.7K
1/16W
on_BACKLIGHT 4
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).
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.
For RSDS and Panel VCC=12V
+5V
+5V
+12V
VLCD_12V
R718
R729
R719
R722
NC/10K
NC/10K
NC/10K
NC
R724 51K
R726 NC/4K7
C716
Q707
4
on_Panel_12V
0.1uF
PMBS3904
C720
NC/0.1uF
20
H3
5
9
5
4
4
TP
1N4148
B
Q702
D702
CHT2907
1N4148
C705
1uF/16V
R704
100
1/16W
+5V
PC5V
Recommond to used "Blue" parts circuit
for VCC1.8V if you want to suppoert DDC
3,4
+5V
PC5V 3
function when system power off
R732
R709
+5V
10
1/16W
0
1/16W
3,4
+5V
D704
D703
TO-263
SMAL140
BAT54C
U702
3
2
VIN
VOUT
4
VOUT
1
ADJ
C713
AIC1084-33PM
0.1uF
R720
12/21 MODIFY
+5V
+12V
VLCD_12V 5
R730
R731
Q705
0
1/16W
NC
AO3401L
+
C719
R728
Title
NC/10uF/16V
NC/4K7
Size
Document Number
B
Date:
Monday , May 09, 2005
Optima L903AD+
VCTRL 4
R702
51
1/16W
VCC1.8
+
C702
VCC1.8 4
4.7uF/16V
D701
R703
2K
1/16W
VCC3.3
VCC3.3 4
VCC3.3
VCC3.3 4
R713
C712
+
C714
NC
100uF/25V
0.1uF
0
1/16W
TSUM56AK
Rev
POWER
A
Sheet
1
of
5
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