UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Bang Olufsen 25" hissing static sound at all times L and R

marsbar · 19th May 2021, 2:29 am

It looks like this will be a winter project.

I have a similar 28", same circuit boards.

This TV is 25.

AUX in: Hissing sound both channels.
A correct BO would anyway have muted hissing on a blank snow screen.

But I noticed when the tv was cold, hissing was low.
Then it increased slightly as tv got hotter.

Hissing is equal in L and R. Static FM noise,
Blank station in FM band.

I am foing to use the schematic and solder out a c leg in the signal path from the amplifiers.

Case is I ordered new speakers, and this set would
Look stunning using RGB in.

Picture looks fine though!

19th May 2021, 2:29 am	#13
marsbar Triode Join Date: Apr 2011 Location: Stavanger, Norway . Posts: 49	Re: Bang Olufsen 25" hissing static sound at all times L and R It looks like this will be a winter project. I have a similar 28", same circuit boards. This TV is 25. AUX in: Hissing sound both channels. A correct BO would anyway have muted hissing on a blank snow screen. But I noticed when the tv was cold, hissing was low. Then it increased slightly as tv got hotter. Hissing is equal in L and R. Static FM noise, Blank station in FM band. I am foing to use the schematic and solder out a c leg in the signal path from the amplifiers. Case is I ordered new speakers, and this set would Look stunning using RGB in. Picture looks fine though!