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TROUBLESHOOTING & REPAIR
F-8 F-8
RANGER 10-LX
Observe Safety Guidelines TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
CAUTION
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
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
No DC welding output. AC welding
output and auxiliary power are nor-
mal.
1. Make sure the Polarity mode
switch (S1) is in the proper posi-
tion and is “seated” correctly.
2. Make sure the electrode and
polarity are correct for the
process being used.
1. Perform the Output Rectifier
Bridge Test.
2. Check the choke (L1), the
Polarity switch (S1), and associ-
ated wires for loose or faulty
connections. Check the choke
winding for continuity and test
to be sure it is NOT grounded to
the choke iron.
No AC welding output. DC weld-
ing output and auxiliary power are
normal.
1. Make sure the Polarity mode
switch (S1) is in the proper
position and is “seated” cor-
rectly.
2. Make sure the electrode is cor-
rect for the process being used.
3. Make sure the welding cables
are not coiled or too long.
1. Check the operation of the
Polarity mode switch (S1). Also
check the associated wires for
loose or faulty connections.
See Wiring Diagram.
2. Check for continuity from lead
“S2” to lead “E” located in the
main stator. See Wiring Dia-
gram.