KV-2199XDK
6.SELF-DIAGNOSTIC CIRCUIT
|
|
|
| IC301 |
| IC001 |
|
|
|
|
|
| IC003 | ||
|
| Y/CHROMA JUNGLE |
| SYSTEM |
|
|
|
|
|
| MEMORY | ||||
FROM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 21 |
|
|
| 45 |
|
|
| 5 | ||||||
CRT |
|
|
|
|
|
|
| ||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
FROM |
|
|
| MP/ |
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
| |||
[+B] Q604 C |
| 18 |
|
|
| 51 |
|
|
|
|
| ||||
| PROTECT |
|
|
|
|
|
|
|
| ||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
| SDA 35 |
| 46 |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
| ||||
[V]Q509/507
[+BÊovercurrentÊ»OCP¼] | 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. |
[VerticalÊdeflectionÊstopped] | Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001 |
| shut down the power supply. |
[VerticalÊdeflectionÊovercurrent] | Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be |
| shut down when detect this by IC001. |
[WhiteÊbalanceÊfailure] | 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.) |
– 7 –
