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Lincoln Electric SVM146-A Welder User Manual

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TEST POINT TERMINALS ANALOG METER X10 RANGE

+Probe - Probe Acceptable Meter Readings

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TROUBLESHOOTING & REPAIR

F-14 F-14

PRO-CUT 80

6. If the input rectifier does not meet the accept-

able readings outlined in Table F.1, the com-

ponent may be faulty. Replace.

NOTE: Before replacing the input rectifier (D1)

check the input power switch (S1) and

perform the Primary Power Board

Resistance Test. Also check for leaky

or faulty filter capacitors.

7. If the input rectifier is good, be sure to recon-

nect leads #207, #207A and #209 to the cor-

rect terminals and torque to 31 in.-lbs. Apply

a coating of Essex D-4-8 insulating com-

pound and Dow Corning 738 Silicone

Sealant.

8. If the input rectifier is faulty, see the Input

Rectifier Bridge Removal & Replacement

procedure. See the Wiring Diagram and

Figure F.2.

INPUT RECTIFIER TEST (continued)

TABLE F.1 INPUT RECTIFIER TEST POINTS

A

B

C

A

B

C

A

B

C

207

207

207

207A

207A

207A

209

209

209

207

207

207

207A

207A

207A

209

209

209

A

B

C

A

B

C

A

B

C

Greater than 1000 ohms

Greater than 1000 ohms

Greater than 1000 ohms

Greater than 1000 ohms

Greater than 1000 ohms

Greater than 1000 ohms

Less than 100 ohms

Less than 100 ohms

Less than 100 ohms

Less than 100 ohms

Less than 100 ohms

Less than 100 ohms

Less than 100 ohms

Less than 100 ohms

Less than 100 ohms

Greater than 1000 ohms

Greater than 1000 ohms

Greater than 1000 ohms

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