论文部分内容阅读
近年由海外陆续转入我国的二手彩电中,大部分都还是九十年代前后生产的,整机电路设计程式较国内同期产品先进些,且采用平面直角的大屏幕显像管,其性价比较大,确有旧物利用的价值。但近期笔者在检修中陆续发现几例送修的二手彩电的故障现象都是有声无光无像,且都是因显像管灯丝烧断所致。大家知道,显像管的价值约占整机的70%,一旦彩电显像管灯丝烧断,若
In recent years, one after another by overseas into China’s second-hand color TV, most of them are still produced around the nineties, the whole circuit design program more advanced than the domestic product over the same period, and the use of flat-angle large screen CRT, its cost is relatively large, and indeed Have the value of the use of old things. However, the author recently found in the overhaul several cases of repaired second-hand color TV failure phenomenon is sound like no sound, and are due to CRT filament blown due. We all know, the value of the CRT about 70% of the whole machine, once the color TV tube filament blown, if