HannStar HQ171D Service Manual page 34

H a n n S t a r D i s p l a y C o r p .
Document Title
Document No.
SOT-223
U701
+5V
NC/LT1117-18
3 2
VI VO
4
VO
C701
NC
BL_ADJ(DC) R31 C51
0V ~ 3.3V 4.7K 1UF
0V ~ 5V 4.7K 1UF
BL_ADJ R31 C32
P W M 47 N.C
D C 4K7 1uF
L701
4 +12V
1 2
CN701
+12V 120 OHM
C706 C707
+ GND 1 2 BL_ON
0.1uF GND 3 4 BL_ADJ
+5V 100uF/25V 5 6
GND 7 8 GND
1 L702 2 9 10
3,4 +5V
GND 11 12 GND
120 OHM
C709 C710 CONN
+
0.1uF
100uF/25V
+5V
R701
1K
R706 NC R705 4.7K
4
Q701
adj_BACKLIGHT
PMBS3904
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
R723 51K
NC 10K 1/16W
R735
Q708
on_PANEL
4.7K 1/16W
4 PMBS3904
Q706
PMBS3906
C721
0.1uF
The information contained in this document is the exclusive property of HanStar Display Corporation. It shall not be disclosed,distributed or reproduced in
whole or in part without written permission of HannStar Display Corporation.
HQ171D_XY _HSM
+3V3 H1
+3V3
9 5
9 5
+ C703 4
4
+ C704
NC
22uF/50V TP
R32 R29 R33 Q4
0 X X X
X 1K 4.7K MMBT3904
+5V
R708
+5V
1K 1/10W 10K 1/16W
R739
R710 NC
R740 C711
R712 4.7K 1/16W
NC
0.1uF
Q703
PMBS3904
D704(SSM12L) Vf=0.38V and If=1A.
So when system power on, the
system loading is about 400mA
1/16W
(3.3V is about 200mA and 1.8V is
about 200mA), So D35 changed
1/16W
from 1N4148(or BAT42) to
SSM12L(schottky diode).
C708 C723
+
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
1/16W AO3401L 0 1/16W NC
C727
C715
0.1uF
0.022uF
+ C717 R727
on_PANEL_12V
22uF/50V NC
H2 H3
9 5 9 5
9 5 9 5
4 4
4 4
TP TP
R711
10K 1/16W
on_BACKLIGHT 4
+5V
3,4 +5V
D704
SMAL140
For RSDS and Panel VCC=12V
+5V
+5V +12V +12V
R729 R719
NC NC
R736 R720
NC NC R724 51K
C716
NC
R737 NC/4K7 PMBS3904 Q707
4
Q709
NC
C722
NC
Page No. 34
Revision
VCTRL 4
R702
51 1/16W
VCC1.8
C702
+
VCC1.8
22uF/50V
D701
Q702 SMAL140 R703
PZT2907A
2K 1/16W
D702
SMAL140
R704
100 1/16W VCC3.3
VCC3.3
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
TO-263
U702 VCC3.3
3 2
VIN VOUT
1
ADJ
C712
C713 AIC1084-33PM + C714
0.1uF del 100uF/25V 0.1uF
VLCD_12V
VLCD_12V 5
+5V +12V
R730
R731
Q705 NC NC
1 NC
C724
NC
R728
+ C719
NC
NC
Title
Power
Size Document Number
Custom
Date: Friday , July 21, 2006
34 / 87
2007/08/09
4
4
VCC3.3 4
Rev
A
Sheet 3 of 5