| 摘要 |
PURPOSE:To eliminate the need for adjustment of a display area by switching the display area of a pattern in interlocking with the switching of the display mode in a receiver displaying display information from an external device by switching. CONSTITUTION:A capacitor C1 for sawtooth wave voltage operation is connected between the pin 8 of an IC11 and the feedback resistor connected in series with a vertical deflection coil. The connecting state of the 1st and 2nd variable resistors VR1, VR2 of a vertical amplitude switching circuit 12 is switched by switching transistors (TRs) 1, 2 to switch the amplitude of the sawtooth voltage through the changeover. Moreover, an integration circuit forming the sawtooth voltage for phase comparison is connected to the pin 1 of the IC11. Then the phase of a horizontal oscillating pulse is changed by switching the connecting state of a variable resistor VR4 and a resistor R4 constituting integration circuit in a horizontal position switching circuit 13 by the TRs 3, 4. |
