Lincoln Electric IDEALARC DC-1000 Service Manual page 92

F-58
SCR OUTPUT BRIDGE REPLACEMENT (continued)
7. Using a 3/8" socket wrench, attach the two
screws (one on each side) holding the SCR
assembly rails to the front panel assembly. See
Figure F.23.
NOTE: It may have been necessary to move or
remove the output choke to gain access to
the bottom anode leads. For access to the
bottom middle screw, nut, and associated
washers, a long handled flat ratchet is rec-
ommended.
8. Using a 1/2" socket and open-end wrench,
attach the secondary leads that connect the
anodes of the SCR heat sink assemblies to the
six transformer secondary (heavy aluminum)
leads as labeled during disassembly.
9. Using a 5/16" socket, attach the small reed
switch lead (#210) to the left, top rear SCR heat
sink using the screw previously removed.
TROUBLESHOOTING AND REPAIR
IDEALARC
10. Using a 9/16" socket and open-end wrench,
attach the two bolts and nuts holding the shunt
assembly to the two positive buss leads con-
nected to the SCR bridge.
11. Feed the J4 gate lead Molex plug up through
the hole in bottom of the PC board compart-
ment. Attach the plug onto the firing board.
12. Secure any cable ties removed previously to
allow for the SCR bridge assembly removal.
13. Using a 5/16 (8mm) nut driver or flat head
screw driver, attach 20 screws (ten per side) to
attach the case sides. Attach the top using 2
similar screws.
14. Raise the front control panel into position, and,
using a 5/16 (8mm) nut driver or flat head
screw driver, secure in position using 6 screws.
® DC-1000
F-58