Hanns.G AG172D Service Manual page 21

17" LCD Color Monitor
SOT-223
U701
+5V
NC/LT1117-18
3
VI VO
VO
C701
NC
BL_ADJ(DC)
0V ~ 3.3V
0V ~ 5V
BL_ADJ R31
P W M 47
D C 4K7
L701
4 +12V
1 2
CN701
+12V 120 OHM
C706 C707
+ GND 1
0.1uF GND 3
+5V 100uF/25V 5
GND 7
1 L702 2 9
3,4 +5V
GND 11
120 OHM
C709 C710 CONN
+
0.1uF
100uF/25V
R706 NC
4
adj_BACKLIGHT
R707
4.7K 1/16W
10/20/2005 : For Panel Protection. Add Q708, Q709, R733~R737, C721~C722
+3V3
For LVDS PANEL +5V
R716 R717
NC 10K 1/16W
R733 R734
NC 10K 1/16W
R735
Q708
on_PANEL
4.7K 1/16W
4 PMBS3904
C721
0.1uF
+3V3 H1
2
+3V3
4 9
9
+ C703
C704
+
NC
22uF/50V
R31 C51 R32 R29 R33 Q4
4.7K 1UF 0 X X X
4.7K 1UF X 1K 4.7K MMBT3904
C32
N.C
+5V
1uF
R708
1K 1/10W 10K 1/16W
R739
2 BL_ON R710 NC
4 BL_ADJ
6
8 GND R740 C711
10 R712 4.7K
NC
12 GND 0.1uF
Q703
PMBS3904
+5V D704(SSM12L) Vf=0.38V and If=1A.
So when system power on, the
R701
system loading is about 400mA
1K 1/16W
(3.3V is about 200mA and 1.8V is
about 200mA), So D35 changed
R705 4.7K
1/16W
from 1N4148(or BAT42) to
SSM12L(schottky diode).
Q701 C708 + C723
PMBS3904 1uF 22uF/50V
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.
VLCD
VLCD 5
+5V +3V3
R721 R722
Q704
R723 51K 1/16W AO3401L 0 1/16W NC
C727
C715
0.1uF
0.022uF
C717 R727
+
on_PANEL_12V
Q706 22uF/50V NC
PMBS3906
H2 H3
5 9 5 9 5
5 9 5 9 5
4 4 4
4 4 4
TP TP TP
+5V
R711
10K 1/16W
1/16W
on_BACKLIGHT 4
3,4 +5V
For RSDS and Panel VCC=12V
+5V
+5V +12V +12V
R729 R719
NC NC
R736 R720
NC NC R724 51K
R737 NC/4K7 PMBS3904 Q707
4
Q709
NC
C722
NC
21
R702
51 1/16W
C702
+
22uF/50V
D701
Q702 SMAL140 R703
PZT2907A
2K 1/16W
D702
SMAL140
R704
100 1/16W
2006/05/26 Change componet 93G1004-4
BY D701-702
del
Recommond to used "Blue" parts circuit
for VCC1.8V if you want to suppoert DDC
function when system power off
+5V
D704
TO-263
SMAL140
U702
3 2
VIN VOUT
1
ADJ
C712
C713 AIC1084-33PM +
0.1uF del 100uF/25V
VLCD_12V
VLCD_12V 5
+5V +12V
R730
R731
Q705 NC NC
1 NC
C716 C724
NC NC
R728
+ C719
NC
NC
Title
Size Document Number
Custom
Date: Friday , July 21, 2006
Hanns.G AG172D
VCTRL 4
VCC1.8
VCC1.8 4
VCC3.3
VCC3.3 4
VCC3.3
VCC3.3 4
C714
0.1uF
Power
Rev
A
Sheet 3 of 5