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| TROUBLESHOOTING & REPAIR |
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| SWITCH BOARD TEST (CONT.) |
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| TABLE F.2 |
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| SWITCH BOARD RESISTANCE CHECKS |
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Apply Positive Apply Negative |
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Test Probe to | Test Probe to |
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Terminal | Terminal | Test Result | Conclusion | Repair Action | Next Procedure | Notes |
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1/8 | 12 | Greater than | OK | None | Continue |
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| 1K ohm |
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| Less than | Shorted | Replace both | Snubber Test |
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| 100 ohms |
| Switch Boards |
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12 | 1/8 | Less than | OK | None | Continue |
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| 100 ohms |
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| Greater than | Open | Replace both | Snubber Test |
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| 1K ohm |
| Switch Boards |
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9 | 4/5 | Greater than | OK | None | Continue |
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| 1K ohm |
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| Less than | Shorted | Replace both | Snubber Test |
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| 100 ohms |
| Switch Boards |
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4/5 | 9 | Less than | OK | None | Continue |
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| 100 ohms |
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| Greater than | Open | Replace both | Snubber Test |
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| 1K ohm |
| Switch Boards |
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1/8 | 9 | Less than | OK | None | Continue |
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| 100 ohms |
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| Greater than | Open | Replace both | Snubber Test |
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| 1K ohm |
| Switch Boards |
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9 | 1/8 | Greater than | OK | None | Continue |
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| 1K ohm |
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| Less than | Shorted | Replace both | Snubber Test |
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| 100 ohms |
| Switch Boards |
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12 | 4/5 | Less than | OK | None | Continue |
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| 100 ohms |
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| Greater than | Open | Replace both | Snubber Test |
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| 1K ohm |
| Switch Boards |
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4/5 | 12 | Greater than | OK | None | Continue |
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| 1K ohm |
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| Less than | Shorted | Replace both | Snubber Test |
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| 100 ohms |
| Switch Boards |
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NOTE: K ohm = ohm reading multiplied by 1000.
NOTE: Always make sure that Switch Boards are changed in matched pairs. Never mix an old style (different part number) Switch Board with a newer style.