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TROUBLESHOOTING & REPAIR | |||||||||||
| CONTROL POTENTIOMETER AND MODE SWITCH RESISTANCE TEST | ||||||||||
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| (continued) |
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| TABLE F.3 |
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| POT/MODE SWITCH RESISTANCE TEST |
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| MODE SWITCH |
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| OHMMETER |
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| OHMMETER |
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| SETTING |
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| CONNECTION |
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| READING |
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| 500K or Higher |
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| 500K or Higher |
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| 500K or Higher |
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| (#218) TO |
| 500K or Higher |
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| (#218) TO |
| 500K or Higher |
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| (#220) TO |
| 500K or Higher |
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| TOUCH START TIG |
| (#220) TO |
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| DOWNHILL PIPE |
| (#218) TO |
| * |
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| * |
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| N/A |
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| about 10K |
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| Ohms values should |
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| sweep smoothly from 10K |
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| N/A |
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| to 0 when ARC CONTROLis |
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| turned from Min. to Max. |
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| N/A |
| (#279) TO |
| about 10K |
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| Ohms values should |
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| sweep smoothly from 10K |
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| N/A |
| (#277) TO |
| to 0 when ARC CONTROLis |
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| turned from Min. to Max. |
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| * Resistance should be very low, The Ohmmeter should read |
| about the same value as |
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| one would get by touching the two meter probes together. |
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If the resistance readings are not as specified in the table, replace the potentiome- ter and mode switch plug and lead assembly, or replace the defective component. See the Wiring Diagram.
if testing is complete, plug P7 back into the control PC board and perform the