Lincoln Electric POWER WAVE 355/405 SVM159-A Service Manual page 101

F-59
POWER BOARD REMOVAL AND REPLACEMENT (continued)
CAUTION
Observe static precautions detailed in PC
Board Troubleshooting Procedures at the
beginning of this section.
5. Locate the three plug connections. J41, J42 and
J43 on the Power Board. See figure F.26.
6. Carefully disconnect the three plugs from the
Power Board.
J42
TROUBLESHOOTING & REPAIR
FIGURE F.26 – POWER BOARD LEAD LOCATION
J41
POWER WAVE 355/405
7. Remove the three nuts at the corners of the board
using a 3/8" nut driver. Board is ready for removal.
8. Replace the power board.
9. Secure the new power board into its proper posi-
tion with the three 3/8" nuts previously removed.
10. Reconnect the three plugs previously removed.
Plugs J41, J42 and J43.
11. Replace the case wraparound cover.
J43
F-59