Lincoln Electric 11141 Service Manual page 118

F-72
OUTPUT RECTIFIER MODULES REMOVAL AND REPLACEMENT (con't)
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.33.
5. Before the output rectifier modules can be
reached, the Snubber
Procedure must be performed.
FIGURE F.33 – OUTPUT RECTIFIER MODULE LEAD LOCATIONS
Output Diode
Modules
Snubber
Board
TROUBLESHOOTING AND REPAIR
Board Removal
POWER WAVE
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.34.
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.
LEFT SIDE
® 355M/405M
F-72