Lincoln Electric POWER WAVE 355/405 SVM159-A Service Manual page 112

F-70
REMOVAL AND REPLACEMENT (continued)
PROCEDURE
1. Remove input power to the POWER WAVE
355/405.
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.
FIGURE F.32 – OUTPUT RECTIFIER MODULE LEAD LOCATIONS
Output Diode
Modules
Snubber
Board
TROUBLESHOOTING & REPAIR
OUTPUT RECTIFIER MODULES
LEFT SIDE
POWER WAVE 355/405
5. Before the output rectifier modules can be
reached, the Snubber
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.
F-70
Board Removal