Source: Beijing Panasonic Washing Machine After-sales Service Phone Number http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3444727. Panasonic fully automatic washing machine, Beijing Panasonic washing machine after-sales service phone number, brief description of structure and working principle. Fully automatic washing machines can be divided into two categories according to different control methods: electromechanical and microcomputer types. The electromechanical fully automatic washing machine completes the whole process of washing, rinsing, and dehydration by controlling the switch of contact points through an electromechanical program controller. The microcomputer fully automatic washing machine realizes the automatic control of the whole process of washing, rinsing, and dehydration by outputting control signals from a microcomputer program controller. The main difference between electromechanical and microcomputer fully automatic drum washing machines lies in the electrical control part, and their overall structures are basically the same. They are mainly composed of a mechanical support system, a washing and dehydration system, a transmission system, an electrical control system, a water intake and drainage system, etc.