| 摘要 |
PURPOSE:To prevent seizure when a deflection yoke is changed over by installing a power source switch, which is operated by synchronizing with opening and closing of the case cover, and a deflecting change-over switch of the deflection yoke, which is installed in the case and inverts the video. CONSTITUTION:When a case cover 9 is opened, an impingement plate 12 is dislocated from a power source switch 8, the power source switch 8 becomes open and a beam electric current of the Braun tube is stopped. Next, when a deflecting change-over switch 7 is changed over and the case 9 is closed, the impingement plate 12 pushes the power source switch 8 and the power source switch 8 is closed, and therefore, the beam electric current of the Braun tube restarts to flow, and the video, which is inverted upward and downward, and from right to left, is reflected. As mentioned above, since synchronizing with opening and closing of the case 9, the power source switch 8 is alternately changed over from on to off, the power source is turned off and the seizure due to the beam electric current of a Braun tube can be removed. |
