本刊(办公版)05/11/P22有篇“提高分辨率会烧开关振荡管?”谈到彩显的二次+B调整用开关管在提高显示分辨率时损坏的原因主要有两点:一是高分辨率时的+B也要增高,这给开关管Q911增加了很大的电压负担;二是Q911长期工作后性能变差。但就笔者多次修理这类故障的经验来看,二次+B电 This issue (office version) 05/11 / P22 there is article “to improve the resolution will burn switch oscillating tube?” Speaking of color display of the secondary + B adjustment with the switch to improve the display resolution of the reasons for the damage there are two main points : First, when high-resolution + B have to increase, which gives the switch Q911 increased a great burden on the voltage; Second, Q911 performance deterioration after long-term work. However, many times I repair the experience of such failures point of view, the second + B electricity