Hanns.G AG172D Service Manual page 21

17" LCD Color Monitor
+5V
C701
NC
L701
4 +12V
1 2
+12V 120 OHM
C706 C707
+
0.1uF
+5V 100uF/25V
1 L702 2
3,4 +5V
120 OHM
C709 C710
+
0.1uF
100uF/25V
adj_BACKLIGHT
10/20/2005 : For Panel Protection. Add Q708, Q709, R733~R737, C721~C722
+3V3
For LVDS PANEL
R716
NC
R733 R734
NC 10K 1/16W
R735
on_PANEL
4.7K 1/16W
4
C721
0.1uF
Downloaded from www.Manualslib.com
SOT-223
U701
+3V3
NC/LT1117-18
3 2
VI VO +3V3
4
VO
+ C703
C704
+
NC
22uF/50V
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
CN701
1K 1/10W 10K 1/16W
R739
GND 1 2 BL_ON
GND 3 4 BL_ADJ
5 6
GND 7 8 GND R740 C711
9 10
NC
GND 11 12 GND 0.1uF
Q703
PMBS3904
CONN
+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
R706 NC R705 4.7K
1/16W
from 1N4148(or BAT42) to
SSM12L(schottky diode).
4
Q701 C708 + C723
PMBS3904 1uF 22uF/50V
R707
P.S: The 1N4148 Vf=0.7V~1V can't meet
4.7K 1/16W
LDO spec. The BAT42, Vf is OK but the
If=200mA(forward current) can not
meet current spec.
+5V
VLCD
VLCD
+5V +3V3
R717
10K 1/16W R721
Q704
R723 51K 1/16W AO3401L 0 1/16W
C727
C715
0.1uF
Q708 0.022uF
C717 R727
+
PMBS3904
Q706 22uF/50V NC
PMBS3906
manuals search engine
H1 H2 H3
9 5 9 5 9 5
9 5 9 5 9 5
4 4 4
4 4 4
TP TP TP
+5V
R710 NC R711
10K 1/16W
R712 4.7K 1/16W
on_BACKLIGHT 4
For RSDS and Panel VCC=12V
5
+5V
+5V +12V
R722
NC R736 R720
NC NC
R737 NC/4K7 PMBS3904
4
Q709
on_PANEL_12V
C722
NC
21
D701
Q702 SMAL140
PZT2907A
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
3,4 +5V
D704
TO-263
SMAL140
U702
3 2
VIN VOUT
1
ADJ
C713 AIC1084-33PM
0.1uF del
VLCD_12V
VLCD_12V 5
+12V
+5V +12V
R729 R719
R730
NC NC R731
Q705 NC NC
R724 51K 1 NC
C716 C724
NC NC
Q707
R728
NC + C719
NC
NC
Title
Size
Date:
Hanns.G AG172D
VCTRL 4
R702
51 1/16W
VCC1.8
+ C702
VCC1.8 4
22uF/50V
R703
2K 1/16W
VCC3.3
VCC3.3 4
VCC3.3
VCC3.3 4
C712
+ C714
100uF/25V 0.1uF
Power
Document Number Rev
Custom A
Friday , July 21, 2006 Sheet 3 of 5