Lincoln Electric INVERTEC V250-S - Manual (Page 44)

F-12 TROUBLESHOOTING & REPAIR F-12
TEST PROCEDURE
1. Remove main input power to the
V250-S.
2. Perform Filter Capacitor Discharge
Procedure detailed in Maintenance
Section
3. Locate the Auxiliary Transformer just
behind the input line switch on the
lower right side of the machine.
4. Locate and disconnect plug J7 from
the wiring harness.
5. Carefully apply the 230VAC isolated
supply to leads H1(1J7) and
H3(2J7) of the auxiliary transformer.
6. Carefully check for the presence of
the following voltages at the appro-
priate leads. See
Table F.1.
AUXILIARY TRANSFORMER TEST (continued)
INVERTEC V250-S
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1J7 2J7 3J7
4J7 5J7 6J7
AUXILIARY TRANSFOMER
PLUG J7
Figure F.1 Auxiliary Transformer and Plug J7.