ESAB Fabricator 181i, Service Manual

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ESAB FABRICATOR 181i
TROUBLESHOOTING 6-18 Manual 0-5449
6.15 Main Circuit Description
!
CAUTION
Turn off power and disconnect mains supply plug from receptacle before working on the unit. Allow two
minutes for capacitors to discharge after disconnection from mains supply voltage.
AC
1
AC
3
+
2
-
4
Q1
TR
1
C19
C16
C17
R2
5
R2
4
R3
2
R3
3
T18-1 T16-1 T14-1 T17-1 T15-1 T13-1
R102
R100
R101
R103
C100
COUT1 COUT2
C18
TRANSFORMER
R3
9
C20 C21
R3
8
PRI-
A
PRI-
A
TR
8
DC
+
C23 C24
R39-
1
R38-
1
R104
C102
1 2 3
WVOUT
C101
R107
R106
1 2 3
WVOUT
-1
PTC
J1
CIN
1
CIN
2
CU3
CU4
R200
CY1
R200
-1
DC
-
DC
-
DC
+
AC
2
AC
1
T19-1 T20-1
OUT
-
OUT+
T1 T2
R2
9
R2
8
R3
6
R3
7
T4
T5
A-09997