TROUBLESHOOTING & REPAIR
F-68 F-68
V350-PRO
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MODE BOARD
REMOVAL AND REPLACEMENT (continued)
FIGURE F.28. – CASE FRONT
9. Remove plug #J34 from the mode board.
10. Remove plug #J31 originating from the status
board located directly above the mode board.
11. Open the cover of the weld mode display on
the front of the machine.
12. Using a 5/16” nut driver, remove the three
5/16” screws as shown in Figure F.28.
13. Carefully maneuver the the mode faceplate up
and away from the machine. The bottom of
the plate will come out first. Note: The mode
board will still be attached to its mounting
plate.
14. Place both knobs in the full counter clockwise
position to gain access to the mounting
screws.
15. Using a small flathead screwdriver, loosen the
screw in the “Hot Start” knob and the “Arc
Control” knob. The knobs should slide off of
their shafts. See Figure F.29.
16. Using a 1/4” wrench remove the nuts and their
washers behind the “Hot Start” and “Arc
Control” knobs.
17. Remove the mode board by gently prying from
behind the board.
