Tweco 400 MST Arc Master - Manual (Page 81)

400MST
9
ADVANCED TROUBLESHOOTING
9 – 44
2.4.29 Transformer (T1) 
1) Remove the side cover. [Reference page: 9-1]
2) Cut off one snap band and disconnect one connector. Remove one screw and three ground terminals.
Cut off two snap bands.
3) Cut the tap wires on the primary side of the transformer (T1), which are connected with the insulated ter-
minal.
 Incorrect wiring of each tap wire when reinstalling the transformer may damage the welding machine.
Check the electrical schematic diagram before connecting the tap wires.
CN1
1 2
3
4