Lincoln Electric IDEALARC DC-1000 Service Manual page 53

F-19
MAIN TRANSFORMER (T1) VOLTAGE TEST (continued)
a. If one or more of the above voltage tests
are incorrect, check for loose or faulty
wiring. If the wiring is good, then the Main
Transformer may be faulty.
NOTE: A long wire with clip or a long probe
may be required to reach the lower
middle lead.
7. Test for 115 VAC between leads #31 to #32 on
the terminal strip. These can be accessed
through the front panel assembly door.
a. If the 115 VAC is not present, check for
loose or faulty wiring or blown fuse. If nec-
essary, untape and track the continuity of
leads #31 and #32 through the entire har-
ness.
b. If the wiring is good, then the Main
Transformer may be faulty.
8. Remove the screws from the control box cover.
It does not have to be completely removed to
perform this test.
TROUBLESHOOTING AND REPAIR
FIGURE F.4 – MAIN SECONDARY LEAD TEST POINTS
IDEALARC
9. Test with an AC voltmeter for 75 VAC for each
phase angle winding as shown. See Figure F.5.
NOTE: If the main supply voltage varies, the
Main Transformer voltages will vary
proportionately. See Figure F.5.
® DC-1000
F-19