Lincoln Electric IDEALARC DC-1500 Service Manual page 72

F-38
STATIC SCR TEST PROCEDURE (continued)
PROCEDURE
1. Remove main supply power to the DC-1500.
2. Remove all Molex plugs from the firing board
and control board. See Figure F.12 and F.13.
9 8 7 6 5 3 4 2 1 9 P I N M O L E X
8 9 6 7 5 1 0 4 1 2 M O L E X 1 1 L 1 1 2 P I N 1 2 3 L 4 L 3 L 5 G 1 5 3 0 - 1 L 2
12 9 6
5
11 8
7 4
10
12 PIN
MOLEX
9 6 3
8 5 2
7 4
1
L 9 L 6 L 5
G 1 5 8 7 - 1 L 7 L 8 L 1 L 3 L 4 L 2 1 2 P I N 9 P I N
G1587-1
TROUBLESHOOTING AND REPAIR
FIGURE F.12 – CONTROL BOARD
L1
3
2
1
9 PIN MOLEX
FIGURE F.13 – FIRING BOARD
L7
12 PIN
L8
L9
IDEALARC® DC-1500
L2
L5
L3
L2
L1
L3
L4
L5
L6
F-38
G1530-1
L4
9 PIN