Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 98

F-46
FIGURE F.12 – MAIN TRANSFORMER LOCATION AND WIRING DETAILS
X1
X7
X3
X4
PROCEDURE
1. Remove input power to the machine.
2. With the 5/16" nutdriver, remove the machine
top and sides.
3. Perform the Power
Discharge Procedure.
4. Inspect the input contactor, reconnect panel,
and primary leads to the main transformer for
loose or faulty connections.
5. Check the reconnect panel to make sure that
the single phase AC power supplied to the
machine is properly connected.
6. Locate leads X1 though X7. See Figure F.12.
TROUBLESHOOTING AND REPAIR
MAIN TRANSFORMER TEST (continued)
Factor Capacitor
SQUARE WAVE TIG 355
X5
X6
WARNING
ELECTRIC SHOCK can kill.
• With input power ON, there
are high voltages inside the
machine. Do not reach into
the machine or touch any
internal part of the machine
while power is on.
7. Turn on input power to the machine.
F-46
X2