Section TOC

F-15

F-15

TROUBLESHOOTING & REPAIR

INPUT RECTIFIER TEST (continued)

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TEST PROCEDURE

1.Remove main input power to the machine.

2.Perform the Input Filter Capacitor Discharge Procedure detailed earlier in this section.

3.Locate the input rectifier (D1) and lead loca- tions. See Figure F.2.

4.With the phillips head screw driver, remove leads #207, 207A and #209 from the rectifi- er.

5.Use the analog ohmmeter to perform the tests detailed in Table F.1. See the Wiring Diagram.

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FIGURE F.2 – INPUT RECTIFIER AND LEADS

#207 (-)#207A

C

B

A

#209 (+)

PRO-CUT 55

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Lincoln Electric SVM140-A service manual Input Rectifier Test, Test Procedure