空调外机风扇的电机和风叶之间的固定螺钉松脱，这一故障的维修方法十分简单，只需重新将扇叶和电机之间的固定螺丝重新扭紧即可。

Fixed screw between air-conditioning fan motor and fan blades loose and maintenance method of this fault is very simple, only needs to be fixed between the screw blades and motor re tighten.

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要想换碳刷， 必须卸螺丝，把电机拆开。

To replace the brushes the motor has to be split by undoing screws.

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同步电机的固定螺丝没有固定，天线电机随同步电机一起转。同步电机的信号线被绞断了。

The fixed screw in synchrous motor is not fixed. The antenna motor rotates with synchrous motor. The signal line was broken by the rotation.

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