77型高频电刀,已成为手木室的常用设备。现将这种电刀的常见故障和修理作一简单介绍。故障现象一:电源指示灯亮,但无火花,也无输出。故障原因及其修理①脚踏开关失灵、接触不良或连接线断开;②四个火花间隙过大,机器停振。此时应调整火花间隙。先将火花间隙按顺时针方向调到闭合状态,再断续踩动脚踏开关,按逆时针方向调整火 Type 77 high frequency electric knife has become a common equipment for hand wood room. This is a brief introduction to the common faults and repairs of this kind of electric knife. Symptom 1: The power indicator is on, but there is no spark and no output. Fault cause and repair 1 Malfunction, poor contact or disconnection of the foot switch; 2 Four spark gaps are too large and the machine stops. The spark gap should be adjusted at this time. Firstly turn the spark gap clockwise to the closed state, then step on the foot switch and adjust the fire counterclockwise.