| 摘要 |
PURPOSE:To efficiently execute a power source supplying and to reduce power comsumption by respectively supplying a power source from the power source to a transistor TR for a horizontal drive at the time of oscillating activating of a horizontal oscillating circuit and from a rectificating circuit after the oscillating activating. CONSTITUTION:At the time of the oscillating activating of a horizontal oscillating circuit 3, since a TR4 for a horizontal drive is not operated yet, a current from a power source terminal 1 is supplied through a resistance 6, a resistance 13, a Zener diode 12 and a diode 14 to the circuit 3. After the oscillating activating of the circuit 3, the TR4 is operated and a TR7 for a horizontal output is operated, too. Thus, through a transformer 8, a direct current voltage is generated from a rectificating circuit 9 and supplied through a diode 15 to the circuit 3. At this time, since the collector voltage of the TR4 is lower than the power sourve voltage of the circuit 3, the diode 14 comes to be a reverse bias and a current to flow from the circuit 9 to the circuit 3 is prevented from flow to the TR4. |
