DONGGUAN XINGDONG ELECTRONICS CO., LTD.
Add: NO.2, Dagao Hengfeng 2nd Road, Changping Town, Dongguan, Guangdong, China
Tel：+86-769-83660708
Fax：+86-769-83660718
Email：info@d-fan.com.cn
URL：http://www.szdosense.com/eng/
Analysis:
1. The "220V Cooling Fan" blade deformation or motor failure;
2. "220V Cooling Fan"turntable motor failure or raceway with debris;
3. Transformer / magnetron fixed bad;
4. Transformer / magnetron itself failed. Solution: "220V Cooling Fan"Check all possible causes of points.