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| TROUBLESHOOTING & REPAIR |
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| TROUBLESHOOTING GUIDE | Observe Safety Guidelines | |
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| detailed in the beginning of this manual. | |
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION |
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| FUNCTION PROBLEMS |
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Output control on welder not func- | 1. Make sure the Remote switch | 1. | Check the Output Control (R1). | |
tioning. | (S7) is in the “MACHINE CON- |
| Normal resistance is 10,000 | |
| TROL” position. |
| ohms. Replace if defective. | |
| 2. The Output Control (R1) may be | 2. | Check the Remote switch (S7) | |
| defective. |
| and associated wiring. | See |
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| Wiring Diagram (leads #75, #76, | |
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| and #77). |
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| 3. The control board may | be | |
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| faulty. Replace. |
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Remote output control not func- | 1. Make sure the Remote switch | 1. | Check the Remote switch (S7) | |
tioning. | (S7) is in the “REMOTE” posi- |
| and associated wiring. | See |
| tion. |
| Wiring Diagram (leads #75, #76, | |
| 2. The remote control unit may be |
| and #77). |
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| faulty. Repair or replace. | 2. The RF bypass board may be | ||
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| defective. Check or replace. | |
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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
RANGER
