(1)机器启动后,键入一键后连续出现多个信号。拆开键盘仔细检查,发现键盘印刷电路软板的触点处有少许迹印。这是因为键在频繁地敲击后,磨损电板形成少量金属粉末,形成上述现象。清洗迹印,重新装入,故障消失。 (2)键盘长期使用后,许多键(特别是数字键)会失灵。往键帽内滴入几滴酒精,反复按几次若仍不能使用,打开键盘,查看哪个键磨损断路,用万用表 (1) When the machine is started, multiple signals appear continuously after one key is typed. Opened the keyboard carefully check and found that the keyboard printed circuit board contacts a little trace. This is because, after the keys are frequently struck, the electrodes wear out to form a small amount of metal powder, which causes the above phenomenon. Cleaning trace, reload, the fault disappears. (2) After the keyboard is used for a long time, many keys (especially numeric keys) will fail. A few drops of alcohol into the keycap, repeatedly press several times if still can not be used, open the keyboard to see which key worn open circuit, with a multimeter