Lincoln Electric 355M Manuel d'utilisateur télécharger pdf (Page 123)

CURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)

TROUBLESHOOTING AND REPAIR

F-77 F-77

POWER WAVE 355M/405M

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21. Replace the current transducer.

22. Replace the two 3/8” mounting nuts previously

removed.

23. Reconnect plug #J90 to the current transducer.

24. Replace any necessary cable ties previously cut.

25. From the rear of the machine, replace the heavy

flex lead to the bottom of the output diode

heatsink assembly using a 1/2” wrench. Note:

Don’t forget to include all washers.

26. Replace the output diode heatsink assembly pre-

viously removed using a 3/8” wrench.

Note: Be sure to place insulation in its original

location.

27. Replace leads X2, #20, X4, #40 previously

removed from the two output diode modules.

Torque to 30-40 inch lbs.

28. Perform the Snubber Board Replacement

Procedure.

29. The rear of the machine may now be placed back

into its original position.

30. Using a 3/8” wrench, replace leads #202, #203,

#206, and #207A previously removed from the

reconnect switches.

31. Tighten the metal nut previously removed from the

inside of the rear wall on the back of the machine.

Channel locks may be necessary.

32. Replace the large plastic nut from around input

power line located at the back of the machine.

33. Replace the four leads to the reconnect panel in

their proper locations.

34. Replace the two CB2 circuit breaker leads previ-

ously removed.

35. Using a 5/16” nut driver, replace the four screws

from the rear assembly.

36. Replace the case wraparound cover.

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Lincoln Electric 355M Manuel d'utilisateur Page 123