| 摘要 |
PURPOSE:To more stably start up a power supply by boosting +B2 up to regulated voltage even when the +B2 is dropped from the regulated voltage at the time of starting up the power supply. CONSTITUTION:The existence of an oscillation output from a horizontal oscillation circuit 9 is detected by an integrated circuit consisting of a resistor 16 and a capacitor 17 at the time of starting up the power supply, and when no oscillation output is generated, a transistor (TR) 13 is turned on and a load resistor 14 is connected as a load of +B1, so that +B2 to be supplied to the circuit 9 is boosted and a horizontal deflecting circuit can be normally operated. After normally operating the horizontal deflecting circuit, the resistor 14 is automatically disconnected from the +B1. |
