Lincoln Electric 355M Manuel d'utilisateur télécharger pdf (Page 66)

TROUBLESHOOTING AND REPAIR

F-20 F-20

POWER WAVE 355M/405M

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TEST PROCEDURE

1. Remove input power to the POWER

WAVE 355M/405M machine.

2. Using a 5/16” nut driver, remove the case

wraparound cover.

3. Perform the Capacitor Discharge

Procedure detailed earlier in this section.

4. Locate the input rectifier and associated

leads. See Figure F.3.

5. Carefully remove the silicone sealant

from leads 207, 207A, and 209.

6. Using a phillips head screwdriver,

remove leads 207, 207A, and 209 from

the input rectifier.

7. Use the analog ohmmeter to perform the

tests detailed in Table F.2. See the

Wiring Diagram.

8. Visually inspect the three MOV’S for

damage (TP1,TP2,TP3). Replace if nec-

essary.

INPUT RECTIFIER TEST (CONTINUED)

#207A

#207

#209A

3/16" ALLEN

BOLTS

FRONT

REAR

Small Lead "A"

To Circuit Breaker

Small Lead "H1"

To Auxiliary Transformer

Figure F.3 Input Rectifier

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Lincoln Electric 355M Manuel d'utilisateur Page 66