Circuit Diagram And Circuit Explanation - Haier EA-1770M Service Manual

Trouble 6:After starting, the noise of the oven is too large.
Dismantle the shell to see
1. if the fan bumps other parts ,The fan rotates with high speed, and cause the loose parts
vibrate and make noises.
2. The electromagnetic field attracts the shell to vibrate and bump other parts to make noises.
Increase the thickness of the sponge strip or shock-resistance rubber to avoid the vibration
of the shell.
Attention: The working sound of the microwave oven contains two parts:
1. The fan rotates with high speed (near 3000 r.p.m.). The fin rubs the air and
makes rubbing noises.
2. The high-voltage transformer will output 2000V high-voltage during work,
and produce a strong magnetic field. It will attract the shell to vibrate slightly
and make some noises.

10.Circuit Diagram and Circuit Explanation

Circuit Diagram and Circuit Explanation
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