Lincoln Electric IDEALARC DC-1500 Service Manual page 67

F-33
CONTROL BOARD TEST PROCEDURE (continued)
POSSIBLE PROBLEMS PERTAINING
TO THE CONTROL BOARD
IF LED 1 (Control Board Power) does not light,
when the start switch is ON.
1. Check for 115 VAC at leads #255 to #256 of 12
pin molex plug. See Figure F.11.
a. If the correct voltage is not present,
check leads #255 and #256 and asso-
ciated wiring for loose or faulty connec-
tions. See wiring diagram and Figure
F.11.
b. Remove main supply power to the
DC-1500. Test for continuity (zero
ohms) from lead #255 to #256 on the
12 pin molex plug. If open, T7 control
board transformer may be defective.
See Figure F.11.
c. Check for 115 VAC at TS1 terminal strip
leads 31 to 202 (32) if present and
wiring is intact. If 115 VAC is not pre-
sent between #255 and #256, T7 may
be defective.
d. If the 115 VAC is present at leads #255
to #256 at 12 pin molex plug and LED 1
does not light, the Control Board may
be faulty. Replace.
TROUBLESHOOTING AND REPAIR
IDEALARC® DC-1500
F-33