Button repair of membrane switch

Membrane switch button repair, today I will explain to you the method of repairing the membrane switch button on household appliances:

1. First disassemble the panel of the membrane switch, and then turn on the membrane button on the upper layer. Check the connection position of the circuit board and the key switch feature to ensure that the switch connection point corresponds to the original one after modification.

2. Use a positioning cone to tap each switch point of the base film on the metal plate. The size of the perforation or the size of the micro switch should be slightly larger according to the size of the pillar. It is best to ensure that the micro switch is built in the hole according to the pillar. Unrestricted movement up and down. If the hole is too small, it may affect the elastic effect of the switch and cause the switch to fail.

3. Compare the distance of each small hole on the golden moon plate. Fix the micro switch on the print board, and connect the connecting wire according to the corresponding connecting point of each switch. The fixed switch board can leave the corresponding printing board edge according to the practical space between the display board and the metal board. Since the new switch board is located between the indicator light display board and the metal plate, it is also necessary to punch holes on the printing board corresponding to the indicator light positions of the display board to ensure that the light emitting tube of the display board can be seen through the printed board from the panel. Signal. Keep a certain distance between the circuit and the two boards to prevent short circuits.

4. Embed the manufactured printed switch board in the metal plate and the corresponding small hole of each press switch, the surface of the metal plate is parallel to the top of the press post. If it exceeds the board surface too high, the outer panel film will hold the switch and cannot be used after recovery. If it is too low, the switch will not be pressed in place and it will not work. The switch board that is broken flat with a rubber pad is reused, the left glue is stuck on the metal board, and the outer protective film of the panel is restored to the status quo. The modified switch board has a very good operating feel, high reliability, long life, and convenient protection. If a switch is damaged during use, it can be directly judged by the sound of the membrane switch button and replaced.

5. The editor has finished introducing the maintenance of membrane switch buttons for household appliances. Although it is a bit complicated, let's study it carefully. If you want to know more about membrane switches, please stay tuned.