Lincoln Electric POWER WAVE 355/405 SVM159-A Service Manual page 108

F-66
INPUT RECTIFIER 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
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.
W A
R N
IN
G
TROUBLESHOOTING & REPAIR
FIGURE F.30 – INPUT RECTIFIER LOCATION
INPUT
RECTIFIER
S T
A T
U S
T H
E R
M A
L
R E
M O
T E
P O
W
E R
O N
O F
F
POWER WAVE 355/405
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.
F-66