Sharp LC-32LB261U, Service Manual

Page: 52 / 134

32 ″ &42 ″ &50 ″ LCD TV Best Buy LC-32LB261U- LC-42LB261U- LC-50LB261U
52
R711
NC
PWR_ON
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
称 爹
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
絬 隔 瓜 絪 腹
B
Custom
9 9 Wednesday , May 14, 2014
09. System Power
<Variant Name>
+3V3SB
BL_ON/OFF
BL_ON_OFF
PS_ON
PS_ON
BL_DIM
PS_ON
BL_DIM BL_ON
BL_ON BRIGHT_ADJ
C734
22UF 20% 6.3V
Q705
MMBT3904
C712
1UF 10V
R755
0R05
R703 NC
C791
10UF 25V
R731
10R 1/16W 5%
C701
100PF 50V
R726
4K7 1/16W 5% C710
100PF 50V
Q703
MMBT3904
C792
100N 16V
C744
4.7UF 10% 10V
C748
100NF 16V
R722
4K7 1/16W 5%
C719
100NF 16V
R743
8.2K 1/16W
C750
4.7UF 10% 10V
U705
AT1529F11U
VCC
1
REF
2
GND
3
FB
4
EN
5
PGND
6
LX
7
VIN
8
E-PAD
9
U702
TPS54339DDAR
BS
1
VIN
2
LX
3
GND
4
FB
5
COMP
6
EN
7
SS
8
GND
9
Q706
MMBT3904
C706
10UF 6.3V 20%
R712
-1% 1/10W
L701
4.7uH
R710
1-1% 1/10W
R702
100R 1/16W 5%
C717
10UF 10V
C751
NC
R701
100R 1/16W 5%
R753
4K7 1/16W 5%
R761
0R05 1/10W
C749
100PF 50V
C790
100N 50V
R706
4K7 1/16W 5%
R7
6
6
100
K
O
H
M
+
-1%
1/
10W
R732
15K 1/10W 1%
U706
VIN
3
VOUT
2
AD
J(
G
N
D
)
1
+
C788
NC
Q702
AO3401A
L703
10uH
R708
6K8 1/16W 5%
C729
0.47uF 16V
C702
1nF 50V
C742
100NF 16V
U701
AP1117E33L-13-77
AD
J(
G
N
D
)
1
VOUT
2
VIN
3
4
4
C715
100NF 16V
R745
48.7 OHM +-1% 1/10W
C735
1UF 25V
R730
4K7 1/16W 5%
R742
4K7 1/16W 5%
R707
4K7 1/16W 5% C789
22UF 16V
C736
100NF 16V
C753
47nF 50V
+
C778
220uF 25V
Q701
MMBT3904
R744
110R 1/10W 1%
R704
47K 1/16W 5%
R729
6K2
C708
0.1uF 50V
C739
10UF 10V
R750
499 +-1% 1/10W
C725
47UF 6.3V
R705
7K5 1/16W 5%
C758
NC
R709
4K7 1/16W 5%
C743
100NF 16V
R737
1K 1/16W 5%
C711
0.1uF 50V
C724
10UF 10V
+3V3SB +5VSB
DDRV
5V_SW
+20V
VCCK
+20V +5VSB
+3V3SB
+20V_AUD
5V_SW
+20V_AUD
+3V3SB
+20V
+3V3SB
+5VSB
5V_SW +5VSB
+5VSB
BL_ON/OFF 6
DRAM Power 1.8V
SOT223 1A/3.3V
Standby Power +3V3SB
PWR_ON 6
BRIGHT_ADJ 6
H => POW ER_ON
L =>
POW ER_OFF
MAIN POWER
B ack Light On / Off
H I => POW ER_OFF
LO => POW ER _ON
Vout = 0.8x(R1+R2)/R2
R1
R2
Core Power 1.15V
U706 Thermal
+
C794
220uF 25V
R713
1K
1/
10W
1
%
C776
NC
SCREW4
GND
1
BL_ON BL_ON/OFF
32" 12V 42",50" 20V
12V / 1.28A
12V_AUD / 2A
Vcck / 435mA
DDRV / 140mA
L70X70
R2
R1
3A
V_out = 0.765 x
(R1+R2)/R2=5.015
+
C793
220uF 25V
3V3SB / 186mA
5V_SW / 790mA
C795
NC
C747
NC
V0=1.25 x (1+R2/R1 )
4/18
change
part
2/13 modify connector pin type
CN701
CONN
2
4
6
8
10
12
1
3
5
7
9
11
SCREW1
GND
1
SCREW2
GND
1
SCREW3
GND
1