Re: Cleaning relay contacts


Hi Chris
it is the button that is the problem, not the PCB, the minute carbon deposits wears off. You can buy pure silverpaint that has a hydrocarbon glue,
specially made to repair tracks and keyboard buttons.
Alternative if you want to go cheap use super glue and aluminium kitchen foil and adhere it to the button.
VK4CSD Stefan 73

----- Original Message -----
Sent: Monday, March 29, 2021 7:02 PM
Subject: Re: [UKMicrowaves] Cleaning relay contacts

On a slightly related subject has anyone found a long lasting way to clean "contactless" key pads on things like TV remote controls which seem to rely on a resistive / capacitive button  to come into contact with a printed "electrode" on the pcb. Despite these being gold plated they seem to need frequent cleaning with IPA to ensure correct operation. I've lost count of the number of times I've had to open mine up to clean said contacts only to have them fail again a few weeks later.


Join to automatically receive all group messages.