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TROUBLESHOOTING & REPAIR |
SNUBBER RESISTOR TEST (cont.)
FIGURE F.9 - SNUBBER RESISTOR TEST POINTS
W R 401/ | 1/ | 9 | 12 | 4/ | 402/ R W |
403 | 8 |
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| 5 | 404 |
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5.Test for 25 ohms resistance from lead 401 to termi- nal 12 on Switch Board.
a.If 25 ohms is measured, Resistor R4 is OK.
b.If 30 ohms or more is measured, Resistor R4 is faulty and must be replaced.
c.If 20 ohms or less is measured, Resistor R4 is faulty and must be replaced.
6.Repeat same procedures to test R5, R6, and R7 per Table F.4.
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TABLE F.4 SNUBBER RESISTORS TEST
Check |
| Test Result |
| Conclusion |
| Next Test Step |
| Repair Action |
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Lead 401 to |
| 25 ohms |
| OK |
| Continue |
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Terminal 12 |
| >30 ohms |
| R4 open |
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| Replace R4 |
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| <20 ohms |
| R4 faulty |
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Lead 402 to |
| 25 ohms |
| OK |
| Continue |
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Terminal 9 |
| >30 ohms |
| R5 open |
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| Replace R5 |
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| <20 ohms |
| R5 faulty |
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Lead 403 to |
| 25 ohms |
| OK |
| Continue |
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Terminal 12 |
| >30 ohms |
| R6 open |
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| Replace R6 |
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| <20 ohms |
| R6 faulty |
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Lead 404 to |
| 25 ohms |
| OK |
| Continue |
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Terminal 9 |
| >30 ohms |
| R7 open |
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| Replace R7 |
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| <20 ohms |
| R7 faulty |
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