Emerson 39" Service Manual page 55

Power Supply CBA Bottom View
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F602) 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.
CN601
F602
BC603
T 2.5A L/250V
C605
BC604
D607
D607A
C607
D608A
R611
2.5A 250V
C617
JS606
JS605
C604
C602
C611
D664
D606
BC602
R614
BC601
R603
D610
R604
C623
R621
D605
D621
R613
C622
C621 R608
D623
R623 C616
R622
Q601
R607
R612 IC602
IC601
Q621
J133
R606
C608
C609
C610
Q602
J130
D609A R609
D608
CAUTION ! : For continued protection against risk of fire,
replace only with same type 2.5A, 250V fuse.
ATTENTION : Utiliser un fusible de rechange de même type de 2.5A, 250V.
CN501
C630
J79 R1306
AMP+13V R1308
J141
BL-ADJ
P-ON+21V J80 J153
PROTECT3
C639 J86
C631 ALL-3.3V
D405 J156
C638
BL-SW
C661
J76
D406 C663
GND
J119
LED-CONT IC651
C633
J81
GND R687
C635
R656 J85
R677 R686
GND J77
R692
C701 R701
R702
C662
R665
R684
R691
R664
C664
R704
D658
R703 Q657
R663
R652
R689
D663
R683
C636
R688
D657
C656
J74
AMP+13V
GND D654
R693 J75
J120
D654A
R694
GND
D653
D656
R651
C1203
C1301 C1304
P-ON+21V C1204
J121 R1303 C1303
R1201
R1302 R1301
P-ON+21V J71
T601
D659A
D650A
D651A
R675 R674
R658
GND J78
R666
AMP+13V J95 R669
R661
R667
C660 R659
R668
R660
C666 FB J96 Q653
D661
R657
R655
10-19
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.
C632 R1305
R1105 R1205
C1310
R1311
R1211
R1312
R1214
C1205
R1221
R1206
R1304
R1210
C1309 R1314 R1209
C1210
C1308
J97
C1208
R685
R1217
GND C1305
GND
R1317
C1207
J98 R1110
C1307
R1321
C1209
GATE3
R1316
J162
R1309
J87
AMP+13V
R1109
AMP+13V R1310
J157
GND
J88
R1220
C1306
R1224
R1125
ILED2
R1225
C1215 R1227
D1203
R1218
C1319
R1325
C1315 R1326
R1318 R1216
R1116
C1219
R1327
D1303
R1129
R1229
C1201
R1228
R1128
C1104 C1101
R1203 L1202
R1202 C1103 R1103
R1101 R1102 R1122
R1329 R1320
R1319
R1123
R1328
J163
C1116
PROTECT3
L1302
D1304
D1104
J100
R1223
GND
D1204
D1305
R1322 C1117
J142 R1222
VLED3
R1323
VLED3
R1219 D1205
C1316
C1317 C1217
C1216
D1201
D1301
C1318
C1218
D652A
J117
GND
J118
GND
C1002
J124
GND
6
CN1001
R654
R1212
R1213
R1204
R1207
R1106
R1108
C1106
R1111
R1112
R1113
R1104
R1107
IC1101 R1114
C1110
C1105
R1117
C1107
R1121
C1108
R1120
C1109
R1119
J148
R1124
R1126
C1115
J93
R1127
J171
GND
GND
J113
D1103
R1118
C1119
Q1101
J111
J92
D1105
ILED3
J90
VLED1
L1102
J99
C1118
D1101
1
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