UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Marconi 2022C, no signal below 250 MHz anymore

Stefan_O · 4th Dec 2017, 1:30 pm

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.

4th Dec 2017, 1:30 pm	#3
Stefan_O Retired Dormant Member Join Date: Nov 2013 Location: Bremen, Germany Posts: 11	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.