Schematic Diagram; Main Board - Haier LT32A1 Service Manual

10. Schematic Diagram

10.1 Main Board

LT26A1 715G3693M01000004K/LT32A1 715G3693M01001004K
3) Power 1
BRIGHT_ADJ:
Normal:Max:+3V3, Min:0V
DC POWER INPUT
Stand_By:0V
INVERTER_ON_OFF:
Normal: High
Stand_By: Low
CN100
INVERTER_ON_OFF
1
BRIGHT_ADJ
2
3
+12V
4
5
6
7
8
+16V/+24V
9
STANDBY
10 FB104 300 OHM
11
+5V
12
C7958
CONN 0.1uF/16V
OPWRSB
+5V_STB
R131 0R05 1/4W
C146 C128
NC/10U 10V
NC
C139
470uF/16V 1U 10V
+
C125
Vout = 0.8 * (1+R108/R109)
+5V +5V_STB
FB100 120R/6000mA
1 2
FB101 120R/6000mA
1 2 C120 C123
+
100N 16V
NC/470uF/10V
+12V
FB102 NC/220R/2000mA
1 2 +16V/+24V
FB103 NC/220R/2000mA
1 2
+5V_STB
DV33SB +5V_SW
OPWRSB STANDBY
Q772
NC/MMBT3904
U105
1 8
FB VSS
2 7
EN VSS
3 6
OCSET OUTPUT
4 5
VCC OUTPUT
AP1538SG-13
D102
C129
C144 SR34
0.1uF 50V
NC
Vout =1.1V , R108 = 620, R109=1.5K
+16V/+24V
OPWRSB(+5V_SW ON/OFF):
Norm al: High
Stand_By: Low
DV33SB
R7893
1K 1/10W
R108 NC
OPWRSB
2
C7833
NC
+16V TO +16V_SW BY OPWRSB
DV11
L102
27uH
C147
+
R125 NC C149
NC/2.2 OHM 1/10W 470UF 25V
C145 C148
NC/0.1uF 50V 0.1uF 50V
R123
1.5KOHM 1/10W
55
+16V/+24V_SW
6 OPWRSB
R7907
16 BRIGHT_ADJ
0R05 1/4W
16 INVERTER_ON_OFF
Q105
1 8
S D
2 7
S D
3 6
S D
4 5
G D
NC
C7831
+
C7832
NC
NC
R7909
NC
Q767
NC
+5V_STB
Q104
Norm al: High
8
Stand_By: Low
D
7
D
Control DV11 and DV33 Sequence 6
D
5
S
SI5441DC
C7804
4.7UF 10V
R130
7K5 1/10W 5%
DV11 R119
2 Q101
BC847C
2.7K 1/10W
+5V_STB(+5V1) TO +5V_SW BY OPWRSB
OPWRSB
BRIGHT_ADJ
INVERTER_ON_OFF
+5V_SW
1
D
2
D
3
D
4
G
+