Lincoln Electric RANGER 9 SVM 110-A Service Manual page 69

F-14
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
Output control on welder not func-
tioning.
Remote output control not func-
tioning.
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.
RANGER 9
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Make sure the REMOTE switch
(S4) is in the MACHINE CON-
TROL position.
2. The Output Control (R3) may be
defective.
1. Make sure the REMOTE switch
(S4) is in the REMOTE position.
2. The remote control unit may be
defective. Repair or replace.
CAUTION
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Check the Output Control (R3).
Normal resistance is 10,000
ohms. Replace if defective.
2. Check the REMOTE switch (S4)
and associated wiring.
Wiring Diagram (Leads 75, 76,
and 77).
3. The Printed Circuit board may
be faulty. Replace.
1. Check the REMOTE switch (S4)
and associated wiring.
Wiring Diagram (Leads #75, 76
and 77).
2. The bypass PC board may be
faulty. Check or replace.
F-14
See
See
RANGER 9