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F-17F-17
PRECISION TIG 275
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TROUBLESHOOTING & REPAIR
Observe Safety Guidelines TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
FUNCTION PROBLEMS
The meter does not display V (volt)
or minimum current.
NOTE: BEFORE REPLACING A
CONTROL BOARD
If an Advanced Control Panel is
installed, remove it and replace
the Jumper in connector J-3. If
the machine functions normally,
the Advanced Process panel or
harness is defective.
1. Toggle the display switch. It may
be dirty.
1. Check the leads between the
display switch and the control
board. See the Wiring Diagram.
2. The display switch may be faulty.
3. The control board may be faulty.
The meter does not light up. Other
machine functions are OK.
NOTE: BEFORE REPLACING A
CONTROL BOARD
If an Advanced Control Panel is
installed, remove it and replace
the Jumper in connector J-3. If
the machine functions normally,
the Advanced Process panel or
harness is defective.
1. None 1. Check the leads and connec-
tions between the meter and the
control board. See the Wiring
Diagram.
2. The meter may be faulty.
3. The control board may be faulty.
CAUTION