UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Jon_G4MDC · 19th Aug 2019, 10:24 am

Hello Chris - no flashes of inspiration so far but still thinking on it.
A couple of questions come to mind.

The TC9122 you removed was the original one installed by Yaesu? No signs it has been resoldered before and this set has worked fine in the past?

Is there any chance of a picture of the new and old TC9122s? I'm interested in case we can see anything with date code markings etc.

I was going to say are you sure you changed the right one since there are 2 used. That is a stupid question as it will be the one on which you measured the BCD codes 805,815 etc - forget I even thought of that but this fault is getting my goat - I'll grab at anything. It has to be in this section of the circuit somehow.

19th Aug 2019, 10:24 am	#36
Jon_G4MDC Nonode Join Date: Nov 2015 Location: Welwyn Garden City, Hertfordshire, UK. Posts: 2,015	Re: Yaesu FT480R Hello Chris - no flashes of inspiration so far but still thinking on it. A couple of questions come to mind. The TC9122 you removed was the original one installed by Yaesu? No signs it has been resoldered before and this set has worked fine in the past? Is there any chance of a picture of the new and old TC9122s? I'm interested in case we can see anything with date code markings etc. I was going to say are you sure you changed the right one since there are 2 used. That is a stupid question as it will be the one on which you measured the BCD codes 805,815 etc - forget I even thought of that but this fault is getting my goat - I'll grab at anything. It has to be in this section of the circuit somehow.