Schematic Diagram; Main Board - Haier LTF42M1C Service Manual

10. Schematic Diagram

10.1 Main Board

1) POWER-1
DC POWER INPUT
BRIGHT_ADJ:
Normal:Max:+3V3, Min:0V
Stand_By:0V
INVERTER_ON_OFF:
Normal: High
Stand_By: Low
CN100
AC_Detect
13
12 INVERTER_ON_OFF
11 BRIGHT_ADJ
10
+12V
9
8
7
6
5
+24V
4
3
2 STB_PWR5V
1
CONN
+5V_STB
R147
68KOHM +-5% 1/10W
R148 1K 1/10W 5%
R155 R145
10KOHM +-5% 1/10W
10K 1/10W 5%
DV33
R149
1 Q108
MMBT3904
NC/10K 1/10W 5%
R150
NC/10K 1/10W 5%
0.6 x (1+2.44K/1.2K) = 1.82V
15uH L101
DV18_DDR
D101
C112 + SS2P4
330UF 16V R124
R104
USE 330uF 16V GF
C102
R115 33N 16V
1%
R117
1.2KOHM +-1% 1/10W
1%
STB_PWR5V
FB100
1
FB101
1
STANDBY:
Normal: High
Stand_by: Low
DV33
R144
1K 1/16W 5%
SMD/0402
STANDBY
Q106
SMD/0402 BC847C SMD/0402
R113 100R 1/16W 5% STANDBY
C124
100N 16V
SMD/0402
+5V_STB
CN101
1
100 OHM +-5% 1/10W 2
3
R146
Q107
CONN
MMBT3906 PNP
AC_Detect
C108 C132
10U 16V 10U 16V
U104 U103
L5945 L5947
1 8 8 1
Vout Vcc Vcc Vout
2 7 7 2
SY NC GND GND SY NC
3 6 6 3
INH FSW FSW INH
4 5 5 4
COMP FB FB COMP
C129 C128
From +5V_SW to +1V8/+1V1
+5V_STB
220R/2000mA
2
220R/2000mA
2 + C107 C106
470uF 10V 100N 16V
OPWRSB(+5V_SW ON/OFF):
Norm al: High
Stand_By: Low
OPWRSB
R126
1K 1/16W 5% STAND_BY
STAND_BY:
Normal: Low
Stand_by: High
DV33
R791
10KOHM +-5% 1/10W
R789 R782 100R 1/16W 5% GPIO_16
NC/0R05 1/10W 5%
Q752
2SK1828 C806
NC/100N 16V
R790
10KOHM +-5% 1/10W
+5V_SW
+ C110
100uF 10V
0.6 x (1+1.1K/1.2K) = 1.15V
L102 15uH
DV11
D100
SS3P4 + C111
330UF 16V
R125
R106
USE 330uF 16V GF
C104 R123
33N 16V
1%
R122
1.2KOHM +-1% 1/10W
1%
44
+5V_STB +5V_SW
Q104 SI5441DC
8 1
D D
7 2
D D
R119 6 3
D D
5 4
33K 1/10W 5%
S G
C105 + C101
330UF 16V
100N 16V
C130 1uF 16V
R130
R107 22K 1/10W
2 Q101
BC847C
10K 1/10W 5%
C121 C114
R154 100N 16V NC/4.7UF 10V
+5V_STB(+5V1) TO +5V_SW BY OPWRSB
DV18_DDR
R131 1K 1/10W 1%
MEM_VREF
R132
1K 1/10W 1% C119 C120
1UF 6V3 100N 16V
SMD/0402
DV18_DDR stabilizer
+5V_SW +5V1_TUN
R120 0R05 1/8W
+5V_STB +5V1_TUN
6 1
D D
5 2
D D
4 3
S G
NC/SI3441BDV
Q103
C131
NC/1uF 16V R102
NC/22K 1/10W
R103 NC/33K 1/10W 5%
R101 C127
STANDBY 2 Q100
NC/BC847C NC/10U 10V Y 5V
NC/22K 1/10W
R100 C126
NC/22K 1/10W NC/100N 16V
STANDBY:
Normal: High
Stand_by: Low
+5V_STB TO +5V1_TUN
FOR IF 5V HAS DIP
+24V
13 +24V
+12V
2,9,13 +12V
+5V_STB
2,5,10,13 +5V_STB
+5V_SW
2,5,8,9,10,11,12,13,14 +5V_SW
+5V1_TUN
2 +5V1_TUN
DV18_DDR
2,6 DV18_DDR
DV11
4 DV11
OPWRSB
5 OPWRSB
STAND_BY
13 STAND_BY
BRIGHT_ADJ
14 BRIGHT_ADJ
INVERTER_ON_OFF
14 INVERTER_ON_OFF
DV33
2,4,5,7,8,11,12,13,14 DV33
DV33SB
2,4,5,7,10,12,13,14 DV33SB
OPCTRL3
4,5 OPCTRL3
MEM_VREF
6 MEM_VREF
GND
2,3,4,5,6,7,8,9,10,11,12,13,14 GND
GPIO_16
5,7 GPIO_16