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TROUBLESHOOTING & REPAIR |
OVERVOLTAGE PROTECTION DC TRIGGER CIRCUIT TEST (cont.)
FIG. F.19 - OVERVOLTAGE PROTECTION DC TRIGGER CIRCUIT
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| 52 | 1J8 | #311 | 1J14 | 6J6 |
| #302 | (+) | ||||
THESE LEADS |
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| #313 |
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| #275D | |||||||
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ARE USED FOR |
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MONITORING |
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CAPACITOR |
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| POWER |
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VOLTAGES |
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SEE TABLE 1 |
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| PROTECTION |
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BELOW |
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| OPTOCOUPLER |
| #301 |
| #305 |
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| DEPENDENT ON |
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| PROTECTION BOARD |
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| TABLE 1:INPUT VOLTS FOR |
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| 460 VOLTS AC |
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IF AC TRIGGER |
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| NORMAL |
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| CIRCUIT IS GOOD, |
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| #301 LEAD |
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| 325 VDC |
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| IS TAKEN TO |
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| 325 VDC |
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| +15 VDC |
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| CIRCUIT COMMON |
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| CONTROL |
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| #275D |
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| 315 VDC |
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11.If 15 VDC is present at step 7, test Capacitor volt- ages using leads shown in Figure F.19.
If voltage does not match table, check reconnect switches for proper operation and proper position for voltage applied. Perform Capacitor Balance
Tests.