Lincoln Electric PRO-CUT 55 SVM140-A Service Manual page 72

F-35
(T2) AUXILIARY TRANSFORMER TEST (continued)
PROCEDURE
1. Remove main input power to the Pro-Cut 55
machine.
2. Perform the
Discharge Procedure detailed earlier in this
section.
3. Locate the auxiliary transformer just behind
the input line switch on the lower right side of
the machine.
4. Locate and disconnect plugs J21 and J22
from the wiring harness. Cut any necessary
cable ties. See Figure F.8.
TROUBLESHOOTING & REPAIR
FIGURE F.8 – T2 AUXILIARY TRANSFORMER
PLUG J21
PLUG J22
T2 AUXILIARY
TRANSFORMER
Input Filter Capacitor
PRO-CUT 55
9
8
6
PLUG J21
(H5) 6
(H2)
4
PLUG J22 (6 Cavity)
(H5) 8
7
(H4)
(H2) 5
PLUG J22 (8 Cavity)
5. Carefully apply the 230 VAC isolated supply
to leads H1 (1J22) and H3 (2J22) of the aux-
iliary transformer. These leads are located in
plug J22.
6. Carefully check for the presence of the fol-
lowing primary and secondary voltages at the
appropriate leads at plugs J21 and J22. See
Figure F.8 and Table F.6..
F-35
5
4
2
3
(H4)
2 (H3)
1 (H1)
(H3)
2
(H1)
1