Lincoln Electric SVM140-A service manual B21

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F-60 F-60

TROUBLESHOOTING & REPAIR

OUTPUT POWER BOARD REMOVAL & REPLACEMENT (continued)

FIGURE F.22 – OUTPUT BOARD LEAD LOCATIONS

x4

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x2

B21

G3326 - [1] PRO-CUT 55 OUTPIUT

B1

B2

J33

x40

x20

J31

J32

J30

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4.Using the 7/16” wrench, remove leads X4, X2 and B21 from the output power board.

5.Remove all plugs from the output power board.

6.Remove leads X20 and X40 from the output power board.

7.Using the phillips head screw driver, remove the two screws from the lower left and right corners of the output power board.

8.Using the 3/16” allen head wrench, remove the four socket screws mounting the output power board to the heat sink.

9.Carefully remove the output power board from the heat sink.

CAUTION

Be sure to follow the recommended static-free methods for handling printed circuit boards. Failure to do so can result in permanent damage to the equipment.

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PRO-CUT 55