FEED-THRU PC Board Test | Lincoln Electric SVM118-A guide

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F-35

FEED-THRU PC BOARD TEST (continued

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1.Remove input power to the machine.

2.With the 5/16" nut driver, remove the machine top and sides.

3.Perform the power factor capacitor dis- charge procedure.

4.Remove plugs J15, J16, J17, and J18 from the feed-thru PC board. See Figure F.8 for location.

5.Remove the 4 phillips head screws mount- ing the feed-thru PC board to the floor of the control box. See Figure F.8.

6.Carefully remove the feed-thru PC board.

7.Test for the resistances between the check points listed on the Feed-Thru PC Board Resistance Test Points Chart. See Figures F.9 and F.10.

•If any of the resistances are out of specifica- tion, replace the feed-thru PC board.

8.After the tests are completed and the prob- lem repaired, install and connect the feed- thru PC board:

•Carefully mount the board to the floor of the control box using the 4 phillips head screws.

•Connect plugs J15, J16, J17, and J18 to the board.

9.With the 5/16" nut driver, install the machine sides and top.

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