| 摘要 |
PROBLEM TO BE SOLVED: To adjust a position in a vertical direction of a screen by inputting vertical sawtooth-shaped wave signals to a DC level control circuit and changing a DC voltage by a voltage stabilization circuit or the like. SOLUTION: The vertical sawtooth-shaped wave signals from an input terminal 1 are applied to the DC level control circuit 13, a DC level is changed according to control signals from a terminal 14 and adjusted vertical sawtooth-shaped wave signals are applied to a vertical drive output circuit 3. When the charging voltage of a capacitor 5 is apt to rise from an initial value by an increased DC current from a vertical deflection coil 4, the voltage stabilization circuit 15 bypasses the increased DC current through a transistor 19 to a resistor 6 and prevents the charging voltage of the capacitor 5 from fluctuating from the initial value. In such a state, when the DC level is changed in the DC level control circuit 13 and the output DC voltage of the vertical drive output circuit 3 is changed, the DC current flowing to the vertical deflection coil 4 is changed. |
