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3.变焦垂直消隐脉冲形成电路索尼KV—W32MH11为16:9宽屏彩电机型,有调整放大模式、放大模式、字幕恢复模式、加宽模式和普通模式可供选择。当电路设在ZOOM(放大)显示模式与字幕恢复模式时,为保证画面不失真,要求对屏幕图像的水平幅度和垂直幅度按一定的比例扩展,因此必须对水平消隐脉冲和垂直消隐脉冲重新进行处理。否则,在变焦ZOOM模式电子束进行垂直方向扫描时,会打到荧光屏顶部与底部的空间去。
3. Vertical vertical blanking pulse forming circuit Sony KV-W32MH11 16: 9 widescreen color TV models, there are adjustable zoom mode, zoom mode, subtitle recovery mode, widening mode and normal mode to choose from. When the circuit is set in the ZOOM (enlarge) display mode and subtitle recovery mode, in order to ensure that the picture is not distorted, it is required to expand the horizontal and vertical amplitudes of the screen image in a certain ratio. Therefore, the horizontal blanking pulse and the vertical blanking pulse Proceed again. Otherwise, when zooming ZOOM mode electron beams vertically, they hit the top and bottom of the screen.