Lincoln Electric SVM 106-A Service Manual page 75

Troubleshooting Guide –
components. See Wiring Diagrams for troubleshooting of specific circuits.
PROBLEMS
(SYMPTOMS)
WIRE FEEDING AND WELDING PROBLEMS (Continued)
The wire feeds but starts and stops
intermittently.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln
Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.
TROUBLESHOOTING AND REPAIR
See Wiring Diagrams for location of specified
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1. The gun trigger may be faulty.
Check or replace.
2. Check
restrictions in the wire feed
path.
CAUTION
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. The drive motor brushes may
for mechanical
2. The
3. The Control PC Board may be
F-11
Observe Safety Guidelines
be faulty. Check and replace if
less than 1/4 in. in length.
wire feed speed
potentiometer may be faulty.
Check the resistance of the
potentiometer over the entire
range of travel. The potentio-
meter should adjust from 0 to
10K Ohms. If adjustment is not
smooth and linear, replace per
Wire Feed Speed Potentio-
meter Replacement procedure.
faulty. Replace.
LN-7 GMA WIRE FEEDER