Lincoln Electric IDEALARC DC-1500 Service Manual page 61

F-27
FIRING BOARD TEST PROCEDURE (continued)
L E F T S I D E
C O N T R O L B O A R D F I R I N G B O A R D
IF
LED 7 is ON
LED 7 is OFF or is DIMMER
than other LED's
LED 8 is ON
LED 8 is OFF or is DIMMER
than other LED's
LED 9 is ON
LED 9 is OFF or is DIMMER
then other LED's
TROUBLESHOOTING AND REPAIR
FIGURE F.7 – FIRING & CONTROL BOARD LOCATION(S)
LEFT SIDE
TABLE F.2 – LED 7,8 AND 9 CHECKLIST
AC power is being supplied to the Firing Board
from leads #203 and #204 connected to the phase
The proper AC voltage may not be reaching the
Firing Board. Check for loose or faulty connections.
AC power is being supplied to the Firing Board
from leads #205 and #206 connected to the phase
The proper AC voltage may not be reaching the
Firing Board. Check for loose or faulty connections.
AC power is being supplied to the Firing Board
from leads #207 and #208 connected to the phase
The proper AC voltage may not be reaching the
Firing Board. Check for loose or faulty connections.
IDEALARC® DC-1500
CONTROL BOARD
FIRING BOARD
THEN
angle winding on the T2 Control Transformer.
Perform the Control Transformer Test
angle winding on the T3 Control Transformer.
Perform the Control Transformer Test
angle winding on the T4 Control Transformer.
Perform the Control Transformer Test
F-27