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本人整理维修笔记时,记起以前所修过的一台电视,其检修过程并不复杂,但其意义却值得深思。一次上门维修创维54cm(21英寸)彩电,故障为:无光、无声,但有屏显字符,也有广告语。重新搜台,电视无节目。拆机后,见机芯片采用TMP87C38和TB1238的创维4T机芯。查遍TB1238外围元件未见异常,代换TB1238故障同前。由于字符显示及其基本操作控制正常,怀疑系存贮器数据改变所造成。按照有关资料介绍,进入维修状态,发现多项数据改变,将其按资料一一还原,当将VM2一项改为04后机器工作正常。退出维修状态后,交付用户收看。
When I organize my maintenance notes, I remember a previously repaired TV. The maintenance process is not complicated, but its significance is worth pondering. A home repair Skyworth 54cm (21 inch) color TV, the fault is: matt, silent, but there are screen characters, but also slogans. Search again, TV no show. After disassemble, see the machine chip using TMP87C38 and TB1238 Skyworth 4T movement. Check the external components of TB1238 no exception, replacement TB1238 fault with the previous. Due to the character display and its basic operation control is normal, it is suspected that the memory data changes caused. In accordance with the relevant information, access to maintenance status, found a number of data changes, according to the data one by one restore, when a VM4 into a 04 machine is working properly. Exit the maintenance status, delivery to the user to watch.