How to repair the malfunction of the tact switch

How to repair the malfunction of the tact switch? Before repairing, we must understand that the structure of the optical touch switch is composed of: insert, base, shrapnel, button and cover. The waterproof light touch switch consists of a layer of polyimide film on the shrapnel.

Then the fault situation is probably:

First of all, touching the switch (button) inside the shrapnel is severely oxidized, resulting in poor contact and malfunction.

Solution: Scrape the oxidized part of the shrapnel, or directly replace the touch switch.

2. Solution: Carefully check the solder joints on the circuit board for virtual soldering and repair them in time; replace the electronic components in time when they burn out; replace the defective circuit board directly.

3. If dirt or water enters the tap changer

Solution: Remove the corresponding equipment shell and check whether the tap switch water is serious. If it is not serious, use a desiccant to absorb water. If it is stained, wipe it with alcohol and install it after the alcohol evaporates. Do not damage the equipment twice. If the water accumulation is serious, you can consider replacing the new touch switch with the same specification and model.