Lincoln Electric INVERTEC SVM129-B Service Manual page 92

F-54
LOWER
TRAY
AREA
PROCEDURE
1. Turn off the Invertec STT and disconnect main
AC input power to the machine.
2. Using the 5/16" nut driver, remove the case
wraparound cover.
3. Perform the
Discharge Procedure. See the Maintenance
section.
WARNING
ELECTRIC SHOCK can kill.
TROUBLESHOOTING & REPAIR
IGBT MODULE REMOVAL
AND REPLACEMENT (continued)
FIGURE F.23 – OUTPUT CHOKE LEAD DISCONNECTION
Input Filter Capacitor
• Before continuing with the
test procedure, perform
the capacitor discharge
procedure to avoid electric
shock.
INVERTEC STT
OUTPUT CHOKE/
IGBT MODULE
SPLICED CONNECTION
4. Locate the lead connection splice from the
output choke to the IGBT module. Remove
the insulating sleeve. Using the 7/16" wrench
disconnect the lead splice. Thread the lower
lead down into the lower tray assembly area.
See Figure F.23.
F-54