Request
for Quote

E-mail

How to Repair the Malfunctioning Microwave Oven Membrane Switch?

Two common faults in microwave ovens are mostly related to membrane switches or FPC printed circuits.


(1) Most of the key switches in the keyboard fail. This failure is usually caused by the leakage of the membrane switch or FPC. The electricity leakage is caused by long-term moisture or moisture erosion of the microwave computer board and it is sometimes difficult to judge whether there is electricity leakage from the appearance of the circuit board. Therefore, if necessary, it will be effective in most times that you directly use absolute alcohol to wipe or clean the membrane switch, FPC and computer board. This kind of failure may also be caused by several disconnections in the FPC printed circuit at the same time, but these disconnections are basically caused by improper maintenance, so they are not common. When checking, you can quickly check the fault by just seeing with the naked eyes or measuring with a multimeter. Then as long as you re-solder the broken wire, the fault can be eliminated.


(2) Individual key switches in the keyboard are malfunctioning. The main reason for this failure is that the FPC circuit corresponding to the failed switch is broken or the membrane switch is in poor contact. You can find the membrane switch corresponding to the malfunctioning switch and repair it.


The failure of the microwave oven buttons is probably due to the aging of the membrane switch panel. If it is more than four years, it is recommended that you replace the membrane switch panel, and it is OK as long as you replace it with one of the same model and specification. This replacement can be done by removing the control panel by people as long as they have basic operational ability. If you can't buy a membrane switch panel, you can also change it to a micro switch. The circuit should be wired according to the old membrane switch board, and the panel can be done by drilling holes, installing micro switches, fixing and wiring with silica gel.


After the microwave oven is used for a long time, the membrane switch may be aging. In this case, the switch that are used with longer time is really not useful, so there is no need to spend money on repairs, and you can replace the membrane switch panel. If the membrane switch fails when used for short time, then it is necessary to see if the machine is affected in any way, such as whether it is damp or corroded by water. These problems are required to be studied carefully.

Relevant Blog
  • Choice of Flexible Circuit for Membrane Switch

    Choice of Flexible Circuit for Membrane Switch

    April 23, 20211. Material composition of membrane switch (flexible circuit)The materials used in membrane switches are insulating films, adhesives and conductors. The insulating film forms the base layer of the cir...view
  • Custom Film Switch Advantages

    Custom Film Switch Advantages

    April 3, 2020(1) DurabilityThe service life of the customized film switch can reach more than one million times. The reason for such a long service life is that the action of the switch is realized by the vertical...view
  • The Introduction Of The Membrane Panel

    The Introduction Of The Membrane Panel

    December 10, 2020Membrane switch panel is a popular word mark and trademark that integrates decoration and functionality in recent years. It is a plastic product used for marking and protection. The production method ...view
  • Car Stereo Wiring Harness

    Car Stereo Wiring Harness

    April 3, 2020The car audio wiring harness is very important for the car audio. A good harness is to ensure safety first, followed by anti-interference and attenuation. Car audio wiring harness can be divided into ...view
  • Wiring Arrangement And Reasonable Layout Of PCB Board

    Wiring Arrangement And Reasonable Layout Of PCB Board

    April 3, 2020Wiring arrangement and reasonable layout of components on PCB board(1) No crossover circuit is allowed in the printed circuit on PCB board. For wires that may be crossed, two methods of "drilling...view
  • The Role of Materials in the Design of Membrane Panel Products

    The Role of Materials in the Design of Membrane Panel Products

    December 10, 2020Switch products are ubiquitous in people's daily life, and people are in contact with such products all the time. As the basis of the product, materials can not only provide people with different ...view
Product Inquiry