Lincoln Electric 355M Manuel d'utilisateur télécharger pdf (Page 112)

INPUT RECTIFIER REMOVAL AND REPLACEMENT (continued)

TROUBLESHOOTING AND REPAIR

F-66 F-66

POWER WAVE 355M/405M

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PROCEDURE

1. Remove input power to the POWER WAVE

355M/405M.

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

wraparound cover.

3. Perform the Input Filter Capacitor Discharge

Procedure detailed earlier in this section.

4. Locate the input rectifier. See figure F.30.

5. Carefully remove the silicon sealant insulating the

six input rectifier terminals.

6. Remove the six screws from the terminals using a

flathead screwdriver. Carefully note the position of

all leads and their positions upon removal. See

Figure F.31.

7. Using a 3/16”in. allen wrench remove the two

mounting screws and washers from the input

bridge. See Figure F.31.

8. Remove the input bridge.

NOTE: Any instructions that are packaged with the

replacement board will supercede these

instructions.

INPUT

RECTIFIER

AR NI

INCOL

ECT

RIC

FIGURE F.30 – INPUT RECTIFIER LOCATION

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Lincoln Electric 355M Manuel d'utilisateur Page 112