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故障现象:(1)该机以前能收看的30多套有线电视节目全部消失,前维修者修理数日,并将存储器N202(AT24C04)和微处理器 N201(MN1871274)均更换,故障始终不能排除。笔者接机检修前重新启动搜索功能,搜台的全部过程正常,随着清晰画面的不断出现,屏幕提示的节目号也不断递增,所有节目从 L 段、H 段、U 段亮相而过,节列总数一个不漏的达到当地正常收看的30多个台:当 L、H、U 三个频段全部搜索完后,屏幕字符提示处于 U 段的正中间,并且无图、无声;当解除菜单中
Symptoms: (1) The aircraft previously watched more than 30 sets of cable TV programs disappear, the former maintenance repair a few days, and the memory N202 (AT24C04) and microprocessor N201 (MN1871274) are replaced, the fault can not always be ruled out . The author picks up and restarts before the search function, the entire process of search Taiwan normal, with a clear picture of the continuous emergence of screen shows the program number is also increasing, all programs from L, H, U debut section, section The total number of columns does not leak to reach more than 30 local stations to watch: When the L, H, U three bands all search finished, the screen character prompt in the middle of the U segment, and no picture, silent;