Lincoln Electric 355M, 405M service manual 53TROUBLESHOOTING and REPAIRF-53, + +

Return to Section TOC

to Section TOC

Return to Master TOC

to Master TOC

F-53TROUBLESHOOTING AND REPAIRF-53

MAIN SWITCH BOARD REMOVAL & REPLACEMENT (continued)

FIGURE F.22 – 3/16” ALLEN BOLT LOCATION

- + - +

3/16" ALLEN BOLTS

- + - +

Return

Return to Section TOC

Return

Return to Master TOC

9.Using a 3/16” allen wrench remove four allen bolts and washers as shown in Figure F.22. At this point, the board is ready for removal.

10.Carefully maneuver the board out of the machine.

11.Apply a thin coat of Penetrox A-13 to the IGBT heatsinks on the back of the new switch boards mating surfaces. Note: Keep compound away from the mounting holes.

12.Replace the four allen bolts and washers previously removed.

13.Replace the eight capacitor terminal nuts, washers, and necessary leads previously removed.

14.Reconnect the three harness plugs previous- ly removed.

15.Reconnect the nine leads (#201-#209) that were previously removed.

16.Replace any necessary cable ties previously removed.

17.Pre-torque all screws to 25 inch lbs. before tightening to 44 inch lbs.

18.Replace the input lead shield previously removed.

19.Replace the case wraparound cover.

NOTE: Any instructions that are packaged with the replacement board will supercede these instructions.

Return to Section TOC

Return to Master TOC

POWER WAVE 355M/405M