Emerson LC320EM2F Service Manual page 50

Power Supply CBA Top View [TYPE B]
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
CN1100
4
C1106
J1169
GND
T1100
J1157
GND
A17F8MPW
T
E234498
J1022 VS2
3
COLD
HOT
D602
D601
R611
L601
C601 D611
2
L600
CN600
C600
SA601
CN601
R601
1
F601
4A/125V
FH601
FH602
RISK OF FIRE-
REPLACE FUSE AS MARKED
A
CAUTION ! :
4A/125V
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
C1110
C1104
BA17F8F0102 2
C7A3 A3
J1007
SW2
SW2
J1008
J1025
LN1
C604
C602
D612
R602
C610
C607
R608
C614
T600
Q601
HOT
COLD
J1140
P-ON-H2
B C
For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
CN1101
C1108
TOOL NO.
1 2 3 4 5 6 7 8 9 10
T1101
C1709
J1029
LN1
J1043
C649
VSEN
J1050
NH1
J1052 PROT2
J1056
D1201
JS1200 PROT
DC-12V
PROT J1057 J1062
PROT5
C648
D1202
R235
R233
J1099
-7.5V
C639 Q222
J1118
D650
Q207-B
D655
D636
R657
C647
Q636 J1139
J1131 P-ON-H2 GND
J1135 OVL C226
P-ON-H2 J1129 J1133
PANEL+3.3V
J1141 GND J1137 J1136
J1085 P-ON-H2
J1171 ALL5V
ALL5V
GND
J1144 D656
GND 1 J1143 D635
ALL5V
19
CN632
18 2
D
10-15
Because a hot chassis ground is present in the power supply
circuit, an isolation transformer must be used when repairing.
Also, in order to have the ability to increase the input slowly,
when troubleshooting this type of power supply circuit,
a variable isolation transformer is required.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CN1102
C1114
C1112
T1102
J1156
GND
J1155
GND
J1024
J1020
GND
PROT5
J1032
PROT6
J1072
GND
J1021
J1049
J1048
GND
IS5 BL-SW
C1206
J1034 J1069
J1045
J1059 DC-12V GND GND
STB
D1301
C1302
J1064
DUTY
J1071
DUTY
D1200
J1170
J1063
GND
GND
D201
J1079
PANEL24V PROTECT3
C203
J1083
J1080 BL-ADJ
D200 J1065
P-ON-H1
J1088
GND
D202
C215
D212
J1098
D221 C214
Q213-C
J1105
PROTECT1 Q221 J200
C220 VCOM2
J1106 +16V
J1111
R239
PANEL15.8V
C228
J1119
D210
GND
J1123 PANEL-6V
J1125 PANEL+3.3V
C230
D652
J1128
JS200 PROTECT3
OE2
F
E
BA17F8F01022