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TROUBLESHOOTING & REPAIR
F-16 F-16
RANGER 300 D AND 300 DLX
OBSERVE SAFETY GUIDELINES TROUBLESHOOTING GUIDE
DETAILED IN THE BEGINNING OF THIS MANUAL.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
FUNCTION PROBLEMS
Output control on welder not func-
tioning.
1. Make sure the REMOTE switch
(S8) is in the MACHINE CON-
TROL position.
2. The output control (R3) may be
defective.
1. Check the output control (R3).
Normal resistance is 10,000
ohms. Replace if defective.
2. Check the REMOTE switch (S8)
and associated wiring. See the
Wiring Diagram (leads #75, #76
and #77).
3. The control board may be
faulty. Replace.
Remote output control not func-
tioning.
1. Make sure the remote switch
(S8) is in the REMOTE position.
2. The remote control unit may be
faulty. Repair or replace.
1. Check the remote switch (S8)
and associated wiring. See the
Wiring Diagram (leads #75, #76
and #77).
2. The RF bypass board may be
defective. Check or replace.
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
1-800-833-9353.