Lincoln Electric Idealarc DC600 9773MSP Service Manual page 65

F-24
LED 7 is ON
LED 7 is OFF or is
DIMMER than other LEDs
LED 8 is ON
LED 8 is OFF or is
DIMMER than other LEDs
LED 9 is ON
LED 9 is OFF or is
DIMMER than other LEDs
IDEALARC DC-600
TROUBLESHOOTING & REPAIR
FIRING BOARD TEST
TABLE F.1 - LED 7, 8 and 9 Check List
IF
AC power is being supplied to the Firing Board from
leads #203 and #204 connected to the phase angle
winding in the Main Transformer.
The proper AC voltage may not be reaching Firing
Board.
Perform Main Transformer Test.
AC power is being supplied to the Firing Board from
leads #205 and #206 connected to the phase angle
winding in the Main Transformer.
The proper AC voltage may not be reaching Firing
Board.
Perform Main Transformer Test.
AC power is being supplied to the Firing Board from
leads #207 and #208 connected to the phase angle
winding in the Main Transformer.
The proper AC voltage may not be reaching Firing
Board.
Perform Main Transformer Test.
THEN
Check for loose or faulty connections.
Check for loose or faulty connections.
Check for loose or faulty connections.