extraction carte électronique moteur oximo rts volet roulant pour changement composant résistance?

Bonjour,
Il faut dessouder les arrivées et sorties électriques pour qu'elle puisse être retirée.

Bonjour, je relance ce sujet car j'ai le même problème de surtension sur une carte. J'ai une varistance (composant bleu) qui a grillé. Quels autres éléments avez vous remplacé pour réparer la carte? merci pour votre aide qui me sera grandement utile sachant que j'ai les mêmes symptômes.

Bonjour, Je n'ai rien fait pour l'instant. Je n'ai pas extrait la carte électronique car c'est compliqué pour moi

Hello,
I also start to repair an Oximo io electronic board.
I have to check some items in the next days.

To your problem:
the blue item is on my board a:
SIOV metal oxide varistors
Leaded varistors, StandarD series
type model: S14K300
but this is an overvoltage protection
it burns by shorting not valid high voltages.
You have check yourself what else was destroyed, sorry.

My "io" board has a different problem:
It does not work anymore.
So, the first is to check the power supplies:
There is the + (!) 330V at the gate of the LNK304 this seems Ok.
But the output of the LNK304 is only 6V (it has to be min. 12V because of the relais) and the output of the LM217 for the ICs is 0V, so it is logical, that the unit do not respond anymore.
I will check in the future days the capacitors and later I may change the LNK ....
They have problems in other machines often.
You can get them as LNK306 for a much higher current.
Maybe it is better to use this model.
But this is only an idea, first I have to check correctly.
I will write here my results, if I have had time to solve the problem.