Summary: due to the machine's ES3207, EPROM, SDRAM, ES3210, servo circuit until the integrated design, decoding, system control for an organic whole. In addition to the ES3210 core of the system to control the microprocessor in addition to the work of the control unit to detect information to implement dynamic control. The exchange of these information data is carried out under the control of a pre - set software program. When one of the control units (such as the servo circuit of the machine), which must be carried out in the data exchange, will cause the whole program to run the disorder. This example fault although is only a problem with the servo circuit, but also affected by the system control circuit of screen display and other controlled unit data normal exchange, so the resulting other controlled unit can not work, and even the emergence of the phenomenon of "machine" crashes.