Haier LT19Z6 Service Manual page 57

2. Power-2
U750
+5V_SW AV33 +5V_STB
G1117-33T43UF
Ver.C
C761 C762
+
100uF 16V
1UF16V C765
SMD 10uF 16V
+5V_SW TO AV33
+5V_STB TO DV33SB
AV33
3
U752
DV33 AV33
G1117-33T43UF
C758
+5V_SW
10uF 16V
R767
NC/0R05 1/4W
C755
+
220UF 16V
SMD NC/10U 16V
C763
1UF16V
Vo=1.25 x (1+1R/120R) = 1.25V
+5V_SW TO DV33
DV33 TO AV12
+5V_SW
FB752
220R/2000mA
SC4215HSETRT
4 5
NC NC
3 6
VIN VO
2 7
EN FB
1 8
C760
NC GND
R760 100N 16V
U754
C753 + C756
220UF 16V 100N 16V 20K 1/16W 1%
SMD
R761
20K 1/16W 1%
R762
1K 1/16W 1%
NEARLY TUNER
+5V_TUNER FROM Regulator
R759
0.5(20K+20K+1k+4K7)/4K7=4.862V
4K7 1/16W 1%
DV33SB
U751
IC G903T63UF 0.6A/3.3V SOT-223
3 2
VIN VOUT
C767
10uF 16V
AV12
U753
AP1117DL-13
2
VIN VOUT
C764
+
100uF 16V
SMD
R756
120R 1% 1/10W
C757 R757
1R 1/10W 5%
PWR_12V
+5V_TUNER
+5V_STB
+
C752
100uF 16V
SMD
PANEL_VCC_ON/OFF(PANEL_VCC ON/OFF):
Norm al: High
Stand_By: Low
10K 1/10W
PANEL_VCC_ON/OFF
NC/10K 1/10W
PANEL_VCC
R752
NC/0R05 4A 1/4W
Q750
8 1
D D
7 2
R751
D D
6 3
0R05 4A 1/4W
D D
5 4
S G
AON4421
C754
1UF16V
R755
33K 1/10W
R758
22KOHM 1/10W
R765
0R05 1/10W
R750
2
Q751
2SC2412KR
R753
C759
NC/100N 16V
+5V_STB OR PWR_12V TO PANEL VCC
57
2,6,8 +5V_STB
4 +5V_TUNER
2,4,6,8,9,11,12,13,14 +5V_SW
2,4,5,6,8,9,12,13,14 DV33
6,12,14 AV33
8,12,14 DV33SB
4,5,6,7,12,14 AV12
2 PWR_12V
14 PANEL_VCC
2,4,5,6,7,8,9,10,11,12,13,14 GND
6 PANEL_VCC_ON/OFF