Re: Marconi 2022C, no signal below 250 MHz anymore
Thanks for the fast answer. Unfortunately I cannot find any datasheet of the SP9131, so I'm not sure how exactly this part is working.
Could find a more readable service manual now, switching is done without relais.
So for now I will check if the switching levels are correct, then check the OM345 (IC9) in front of the divider and hope it's one of them.
|