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一台日产VIP—1000型放像机,通电后,不能放像,其它功能正常。卸开机盖通电观察:按放像键时有加载动作,且加载到位,主导轴转动正常,但磁鼓不转动,从故障现象判断,故障在鼓电机及其驱动电路,或者在与鼓电机驱动有关的控制电路中。逐一检查鼓电机及其伺服驱动电路,未发现异常故障。该机系统控制采用μPD7538C微处理器,有关电路知附图所示。
A Nissan VIP-1000 player, power, you can not play, other functions are normal. Open the lid power observation: press the play button when there is a loading action, and loaded in place, the capstan rotation is normal, but the drum does not rotate, judging from the fault phenomenon, failure in the drum motor and its drive circuit, or with the drum motor driver Related to the control circuit. Inspect the drum motor and its servo drive circuit one by one without any abnormality. The aircraft system control μPD7538C microprocessor, the circuit shown in the attached map.