Lincoln Electric INVERTEC V275-S Service Manual page 76

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MAIN SWITCH BOARD REMOVAL & REPLACEMENT (continued)
PROCEDURE
1. Remove input power to the V275-S.
2. Using a 5/16" nut driver, remove the case
wraparound cover.
3. Perform the Input
Discharge Procedure detailed earlier in this
section.
4. Locate the main switch board. See Figure
F.23.
5. Carefully disconnect plug J10 from the main
switch board. See Figure F.24.
6. Label leads and using a 7/16" nut driver, dis-
connect leads 201, 202A, 203A, 207, 204,
205, 206, 208, 209. Note washer positions
for replacement. See Figure F.24.
TROUBLESHOOTING & REPAIR
FIGURE F.23 – Main Switch Board Location
Filter Capacitor
V275-S
Main Switch
Board
7. Using a 3/16" allen wrench, remove the four
main switch board mounting screws. See
Figure F.24.
8. Carefully maneuver the board out of the
machine. Replace.
9. Clean all contact surfaces.
10. Replace previously removed allen bolt
mounting screws. Torque to 50 inch lbs.
11. Replace previously removed leads and
torque to 50 inch lbs.
12. Reconnect plug J10.
13. Replace the case wraparound cover.
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