Microwave oven is noisy: how to fix it

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Membrane Switch: How to Fix
Touchpad buttons not working. Each individual touchpad button on some models is a Mylar-based switch.

Such a switch contains two plates covered with conductive material on the sides facing each other. Meanwhile, there are also sensor-type designs.

The touch control panel is the most difficult structure to repair. Usually, for such a configuration, only a complete replacement of the panel is used.
When the user presses a touch panel key, the plates contact, closing an electrical circuit. This sends a signal to the electronic control board.

The conductive coating of the membrane switch plates wears out over time, which causes the button to malfunction. In this case, the defective button (or panel in the case of sensors) must be replaced:

Turn off the microwave oven.
Remove the microwave oven body.
Find the membrane switch.
The membrane switch system is a modular part of the control mexico telegram data board and is connected to it by a flat ribbon cable. First of all, the integrity of the connecting cable should be checked.

To test the touch buttons directly, you will need a schematic diagram of the microwave oven, which shows the matrix arrangement of the membrane switches.

Check the integrity of the contacts of the touch buttons using a multimeter. The resistance of the transition between the contacts of working buttons should be several ohms.

If the device works but makes an unusual noise, the electric motor of the mobile trestle may be faulty. The round tray (trestle) is connected to the motor shaft via an adapter.

It is easy to dismantle the sump motor for inspection. You only need to unscrew one mounting screw and disconnect the power supply connector. The motor is located in the area of ​​the bottom of the housing
Long-term use of equipment often leads to wear of the adapter. Wear, in turn, leads to shaft distortion and ultimately damage to the motor. Any of the damaged parts requires replacement.