Lenovo LXM-WL19CH Service Manual page 18

19" LCD Color Monitor
GND
GND
GND
+5V
+5V
3,4 +5V
GND
11
C709
+ C710
100uF/16V
0.1uF/16V
BL_ADJ(DC) R705 C708 R706
0V ~ 3.3V 4.7K 1UF 0
0V ~ 5V 4.7K 1UF X
BL_ADJ R705 C708
P W M 47 N.C
D C 4K7 1uF
+5V
R717
10K 1/16W
R725 4.7K
4 on_Panel
C718
0.1uF/16V
CN701
1 2 BL_ON
3 4 BL_ADJ
5 6 +5V C708
7 8 GND
9 10 +5V 0.1uF/16V
GND
12
R708
10K 1/16W
CONN R710
C711
NC
Q703 R712
PMBS3904 4.7K
R701 R707 Q701
X X X
1K 4.7K MMBT3904
+5V VLCD
VLCD
R714
10K 1/16W
R723 Q704
51K 1/16W AO3401L
1/16W
Q706
PMBS3904
C715
0.1uF/16V
C717 R727
+
10uF/16V
10K
+5V
R701
1K 1/16W
R705 R706 NC
4.7K 1/16W
R707
Q701
PMBS3904 4.7K 1/16W
+5V
NC
R711
10K 1/16W
on_BACKLIGHT 4
1/16W
+5V VCC3.3
5
3,4 +5V
R721 R722 D704
0 1/16W NC SSM24
1/16W
H2 H3 H1
9 5 9 5 9
9 5 9 5 9
4 4
4 4
TP TP
FTD7 FTD8 FTD9
FD Mark FD Mark FD Mark
18
Adj_BACKLIGHT 4
LL4148
Q702
MMBT2907AK
D702
LL4148
C705
NC
R704
100 1/16W
+5V +5V PC5V
PC5V 3
R709 D703(BAT54) Vf=0.53V (worst cauae) when
If=100mA. So when system power off, the
NC
system loading is about 32mA, it is
safe.
D703 TO-263
NC/BAT54C-GS08
U701 AIC1084-33PM
3 2
VIN VOUT
4
VOUT
C713
+
C712
0.1uF/16V 100uF/16V
12/21 MODIFY
5
5
4
4
TP
Title
POWER
Size Document Number
Custom
Date: Friday , August 19, 2005
Lenovo LXM-WL19CH
VCTRL 4
R702
51 1/16W
VCC1.8
C702 +
4.7uF/16V
VCC1.8 4
D701
R703
2K 1/16W
VCC3.3
VCC3.3 3,4
VCC3.3
VCC3.3 3,4
C714
0.1uF/16V
Rev
715G1697-1-2 A
Sheet 2 of 5