Lincoln Electric INVERTEC SVM129-B Service Manual page 60

F-22
T4 AUXILIARY TRANSFORMER TEST (continued)
MOUNTING
BOLTS (5)
7. Carefully lift and tilt the Invertec STT
machine onto its right side. See Figure F.6.
8. Using the 7/16" wrench, remove the five
bolts holding the lower tray assembly to the
case bottom.
T4 AUXILIARY
TRANSFORMER
TROUBLESHOOTING & REPAIR
FIGURE F.6 – STT ON ITS RIGHT SIDE
FIGURE F.7 – PLUG J13 LOCATION
IGBT
DRIVE BOARD
PLUG J13
STT II
INVERTEC STT
9. Carefully slide out and support the lower tray
assembly for testing purposes.
10. Locate and remove plug J13
IGBT drive board. See Figure F.7.
F-22
from the