Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 248

F-188
OUTPUT RECTIFIER BRIDGE REMOVAL AND REPLACEMENT (continued)
PROCEDURE
1. Remove main input supply power to the
machine.
2. With the 3/8" nut driver, remove the 4
screws that hold the handle to the machine.
3. Remove the rubber gasket (cover seal) from
the lift bail.
4. With the 5/16" nut driver, remove the sheet
metal screws from the case top.
5. With the 5/16" nut driver, remove the
screws holding the right and left case sides.
Remove the case sides by lifting up and
out.
6. Perform the
Procedure described earlier in this section
of the manual.
TROUBLESHOOTING & REPAIR
FIGURE F.70 - OUTPUT RECTIFIER BRIDGE LOCATION
Capacitor Discharge
POWER WAVE 450
1. OUTPUT RECTIFIER BRIDGE
WARNING
Before continuing with the
test procedure, perform the
capacitor discharge proce-
dure to avoid electric shock.
7. After you have completed the capacitor dis-
charge procedure for all four switch boards,
cut all necessary cable ties (necessary for
removal of the output rectifier bridge) on the
left side of the machine.
8. Disconnect all necessary leads from the left
side of the output rectifier bridge (two
heavy and two small leads). Place the fas-
tener hardware back together to avoid loss.
F-188