Lincoln Electric RANGER SVM148-B Service Manual page 75

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OBSERVE SAFETY GUIDELINES
DETAILED IN THE BEGINNING OF THIS MANUAL.
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
1-800-833-9353.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Make sure the REMOTE switch
(S8) is in the MACHINE CON-
TROL position.
2. The output control (R3) may be
defective.
1. Make sure the remote switch
(S8) is in the REMOTE position.
2. The remote control unit may be
faulty. Repair or replace.
CAUTION
RANGER 300 D AND 300 DLX
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
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.
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.
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