Lincoln Electric 405M, 355M service manual Output Rectifier Modules Removal and Replacement con’t

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F-70 TROUBLESHOOTING AND REPAIR F-70

OUTPUT RECTIFIER MODULES REMOVAL AND REPLACEMENT (con’t)

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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 wrap- around cover.

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

4.Locate the output diode modules located behind the snubber board. See figure F.32.

5.Before the output rectifier modules can be reached, the Snubber Board Removal Procedure must be performed.

6.After the snubber board is removed, remove the four leads connected to the modules using a 3/16” allen wrench. These leads are #X4, #X2, #20, #40. Note their positions for reassembly. See Figure

F.33.

7.Remove the copper plates from the tops of the modules.

NOTE: Any instructions that are packaged with the replacement part will supercede these instruc- tions.

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FIGURE F.32 – OUTPUT RECTIFIER MODULE LEAD LOCATIONS

Output Diode

Modules

Snubber

Board

LEFT SIDE

POWER WAVE 355M/405M