Lincoln Electric INVERTEC SVM129-B Service Manual page 104

F-66
CAPACITOR REMOVAL AND REPLACEMENT PROCEDURE (continued)
LOWER
TRAY
AREA
PROCEDURE
1. Turn off 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.
TROUBLESHOOTING & REPAIR
FIGURE F.30 – OUTPUT CHOKE LEAD DISCONNECTION
Input Filter Capacitor
INVERTEC STT
OUTPUT CHOKE/
IGBT MODULE
SPLICED CONNECTION
WARNING
ELECTRIC SHOCK can kill.
• Before continuing with the
test procedure, perform the
capacitor discharge proce-
dure
shock.
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.30.
F-66
to avoid electric