KV-HF21M80
6.SELF-DIAGNOSTIC CIRCUIT
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| IC301 |
| IC001 |
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| IC003 | ||
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| Y/CHROMA JUNGLE |
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FROM |
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| 45 |
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FROM |
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[+B] Q604 C3 |
| 18 |
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| 51 |
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| PROTECT |
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| SDA 35 |
| 46 |
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[V]Q509/507
[+B overcurrent ªOCPº] | Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON |
| and the voltage to pin 18 of IC301 should go down when V.SYNC is more than seven |
| verticals in a period, the unit will automatically turn off. |
[Vertical deflection stopped] | Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001 |
| shut down the power supply. |
[Vertical deflection overcurrent] | Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be |
| shut down when detect this by IC001. |
[White balance failure] | If the RGB levels* do not balance or become low level within 5 seconds, this error will be |
| detected by IC301. TV will stay on, but there will be no picture. |
| * (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.) |
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