6. SELF-DIAGNOSTIC CIRCUIT
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| IC301 | IC541 |
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| IC001 |
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| IC003 | |
| Y/CHROMA JUNGLE | V.OUT |
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FROM | 21 | IK IN |
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| 36 | 5 | ||
CRT |
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| REF | 3 | 17 |
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IC521 | 18 | HP/PROTECT |
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PIN 7 |
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| 18 |
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| SDA | 35 |
| 37 | SDAT |
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+B overcurrent (OCP)
Occurs when an overcurrent on the +B(115V) line is detected by pin 18 of IC301. If the voltage to pin 18 of IC301 is less than 1V when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.
Vertical deflection stopped
White balance failure
Occurs when an absence of the vertical deflection pulse is detected by pin 17 of IC001. Power supply will shut down when waveform interval exceeds 2 seconds.
If the RGB levels* do not balance within 2 seconds after the power is turned on, 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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