Lincoln Electric IDEALARC DC-1500 Service Manual page 76

F-42
ACTIVE SCR TEST PROCEDURE (continued)
PROCEDURE
1. Remove main supply power to the DC-1000.
2. Remove all Molex plugs from the Firing Board
and Control Board. See Figure F.15 and F.16.
2 1 9 P I N M O L E X M O L E X 8 9 7 6 5 3 4 L 4 L 3
4 1 2 P I N L 1 1 1 1 2 9 1 0 8 7 6 5 1 2 3 L 2 L 5 G 1 5 3 0 - 1
12 9 6
5
11 8
10 7 4
12 PIN
MOLEX
9 6 3
5 2
8
7 4 1
L 9 L 5 L 6 L 4 L 8 L 3
G 1 5 8 7 - 1 L 7 L 1 L 2 1 2 P I N 9 P I N
G1587-1
TROUBLESHOOTING AND REPAIR
FIGURE F.15 – CONTROL BOARD
L1
3
2
1
9 PIN MOLEX
FIGURE F.16 – FIRING BOARD
L7
12 PIN
L8
L9
IDEALARC® DC-1500
L2
L5
L3
L2
L1
L3
L4
L5
L6
F-42
G1530-1
L4
9 PIN