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故障现象与检修:一台金星C5438型彩电,购机不足一年,出现屏幕全绿、亮度失控(拌音正常),十分钟后又出现声光全无的常见故障。开机检查发现电源调整管V_(513)(2SD1710)实际上用的是D1710)已击穿,用BU207代用后电视机又恢复到屏幕全绿、亮度失控故障。用500型万用表检测显像管座板三只三色驱动视放音,如图1所示。
Symptoms and maintenance: a Venus C5438-type TV, purchase less than a year, the screen appears green, out of control brightness (normal mixing), ten minutes after the sound and light there is no common fault. Boot check found power regulation tube V_ (513) (2SD1710) is actually used is D1710) has been breakdown, with the BU207 TV sets and returned to the screen after all green, the brightness out of control failure. 500 multimeter detection kinescope seat plate three tricolor drive as playback, as shown in Figure 1.