Try manual loading, unloading, feel smooth no obstacles. Check the load motor, drive belt, limit him switch, load drive are normal. Further examination revealed: according to the out of the box key, 7 seconds CPU (E$3207) 39 foot issued a signal box, signal is issued immediately out of the box, that time delay box is out of the box information delay issued by. Into the box in place after the CPU delay of 7 seconds to send a focus signal, the same as CPU after PLAY is also delayed about 7 seconds to send the corresponding signal, which is estimated to have an abnormal CPU. Because of television and the screen display were normal, so the panel normal and the decoding board (servo and decoding combo, decoding ES3210+ES3207) has received the proper instruction. Check CPU power, reset, clock oscillation are normal. With the same type of substitution normal decoding board, the fault still, that caused by the abnormal CPU, the fault should be in movement. Check the connection between movement and decoding board, found no abnormalities. Further careful examination, found head straight tooth and sliding drive gear junction with a foreign body filling in the straight tooth slot, with the foreign body, foreign body aspiration was found to be straight teeth fall off the rack, so far, troubleshooting.

Maintenance also found in open, the sliding transmission gear and fretting about, like drive head impact within the limit switch, if at this time by hand along the movement direction of assistance immediately out of the box, do not delay. Similarly, the gear is also in place after the entry into the case, if the power is immediately focused. After check the head of the limit switch is good, which shows that the machine and other machine control principle is not the same. According to the open, CPU receives the signal not immediately issued a command box, but first a slip control signal, the head impact within the limit switch, the switch on time, CPU upon the switching signal to send out a command box. And due to the broken tooth filled the spur gear and the transmission gear of the driving head of the force is not sufficient to within the limit switch is closed and CPU receives less than the signal, not immediately issued a command box, the rest of the phenomenon similarly.

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