Sharp LC-32LE140E Service Manual page 28

LC-32LE140
3
12V_STBY
12V_INV
DC/DC1
F9
1 2
12V_VCC
60R 6
0R
F287
1 2
12V_STBY
60R
C1091
22uF
16V
/ADAPTER
W/ADAPTOR & W/IPS16&17&60&PW25
Short CCT Protection Circuit
Short circuit protection is necessary for protecting chassis and main IC against damages
FS5
when any Vcc supply shorts to ground. Protect pin should be logic high while normal
1 2 12V_VCC
7A/32VDC 12V_VCC
operation. When there is a short circuit protect pin shold be logic low. After any short
4A
detection, SW forces LEDs on LED card to blink.
12V_STBY
DC/DC3
3V3_STBY
C1107
C
1uF
6V3
F291
3V3_VCC
1 2
60R
C1093
22uF
6V3
ET_CONTROL
3
U174
C1112
MP1583
2
10nF
1 BS 8
1
16V SS
2 7
IN EN
3 6
SW COMP
C1092 C1037
4 5
22uF 100nF GND FB
16V 16V
L118
1 2
15uH
C1102 C1103
22uF 22uF
16V
16V
F10
1 2
C1114
60R
2
10nF
1
F286 16V
1 2
60R
C1089 C1090
22uF 22uF
16V 16V
for 3v3 Panel Sup.
SHORT CCT PROTECTION
3V3_STBY
R1738 R1769
Q180
20k 100k
BC858B
R1770
Q178
C971
6 EN 1
3
FB 150k
2
100nF R1638
U176
150K
5 1 2 10UH
10V 2
1 10k
VIN GND
MP2012 L116
4 3
BC848B
PVIN SW
1
10uH
C1094 C1101
22uF 22uF
6V3 6V3
C70
470nF
25V
L2
4
W/ADAPTOR
C1038
100nF
7
16V
R1972
12V_STBY
2 1
10k R1709
R1690 1 3k9 2
1 2
1 10k 2
5n6F
50V
C1130
F7
1 2 5V_VCC
60R
F6
1 2 5V_STBY
60R
MOSFET_CONTROL
DC/DC2
30068939
1 8
BS SS
U23
R1689
2 7
12V_STBY
IN EN
2 10k 1
C1129
MP1484
R1708
3 6
SW COMP 5k6
1 2
3N3
R3
5n6F
4 5
GND FB 6k8
50V
L123
NC
1
1 2
15uH
L16
1
10uH
C1097
C1096
3
22uF 22uF
6V3 6V3
R1635
COMMON
2 10k 1
3
1
R1636
1 2
10k
2 3
F273
3
1
12V_VCC
R20
60R
2 10k
1V8_VCC
Q211
3
C1098
22uF
2
6V3
BC848B
1
LNB CIRCUIT
10V C69
220uF
1uF
4 C65
50V
28
27
V_UP
5
SW2
5V_STBY
8
25V
R1722
1 47R 2
3
R1698
Q184
10k 2
2 1
BC848B
1
1uF
6V3
C974
R1649
F12
VDD_AUDIO_PWR
2 33k 1
2
3V3_VCC
60R
F11
10k
1 2 2
3V3_STBY MOSFET_CONTROL
R1631
60R
R1727
12V_VCC
2 33k 1
R1750
22k
3V3_VCC
5V_VCC
DC/DC4
3V3_TUNER
ADAPTOR OVER VOLTAGE PROTECTION
30068939
R40
C1113
1
2
20k
BS SS
10nF
U173
1
16V
R21
2
2 IN EN
10k
MP1484
C1085 C1084
3
3V3_STBY
1 2
22uF 22uF SW COMP
3
16V 16V
4
U7 VCC
GND FB
LM809 RST GND
2 1
R1973
100R
L117
10uH
C1087
22uF
6V3
1N4001
D7
5
22
VO_TX
6
5V_VCC
A
SW3
3V3_STBY
B
R1723
1 47R
3
R1697
Q183
10k 2
2 1
BC848B
1
C
8
12V_STBY
R1691
7
12V_VCC
2 10k 1
C1131
R1710
6
1 3k9 2
1 2
R1686
5n6F
5
39k
50V
R1768
1k
1V2_VCC
C1086
22uF
D
6V3
6
12V_STB
2
5V_VCC