Hi, I have a small PCB board with just two IC's, zener, diodes, resistors and capacitors. That problem is that the board does not work when it is cold and after it warms up, it works fine. Is it possible that the problem are the IC's? Or do you think it is probably from another thing? Thanks, Bruno
As per your post, i guess you cant debug the fault. As you have mentioned, if the Small PCB is having just two IC's, zener, diodes, resistors and capacitors, just remove all components and replace with new ones. Your problem will be solved instantly. Cheers
Since it is a small board, I can in fact substitute all the components.
But I would like to know your opinion If I had instead a very large board, what are the components that have a higher probability to malfunction as I described in my first post?
The IC’s can malfunction when cold and function correctly when warm? The resistors? The zeners?
You need to establish what the problem is first. It could be that you have a floating input that drifts to a point where it works due to a bad design or connection. If it genuinely a temperature related problem I would track it down with a freezer spray.
Hi,
In my opinion is to sort in temperature for malfunction is falsh!
Temp`s are question of dimensioning the circuits too, so can be a "worm component" absolutly normal in function... Nobody can it so generell say for you.
K.
The board is used on an industrial machine and it's function is to rotate a set of pins when the newspaper arrives. It is a stacker for newspaper that comes out of the printing press.
The problem was solved by changing the IC's and a zener.