To N9IB
Your problem it is hidden in my former title, and maybe other members will not find it, maybe you should open other thread. I have opened a new thread regarding malfunction in the first 10 minutes after switch on the radio.
I asked about reception in GEN because the band filters in RF unit for HAM or GEN are different. And the electrolytic capacitors in the HAM filters have given problems sometimes, so the first thing would be to discard the filters. As you say the lack of reception is similar in both modes, the problem it is not in the filters themselves. Once filters discarded, comes teh voltages that selects the filters.
So you have to check J10, J11 (HAM), J12 (GEN/HAM) and J13 (GEN) just pull them and push them. J13 should have 13.5 in the selected band and 0V in the others. J10, J11 0/4V, and J12 HAM/GEN 0.7/9 and 0.7/8. I am a bit lost in the logic and uP. But I think I am right. May someone know better.
Another problem is than the band filter is OK but the logic HAM/GEN is opposite in this case.
But you can check in the filters that the diode are ON, even if when testing the reception is affected by the voltage testing
So I think this is the first thing to do.
I dont know how to analyse the logic that generates those voltages, uP and so on. I am old and I manage better tube radios hahahaha
But first thing is to cleac/ check voltages in those connectors, before I told you to lift them and put them to clean them. But it is easy to check that the correct voltage arrive to the band, and.... no voltage to the other bands.
Maybe you should copy this text if you find it interested, for your new thread on your problem. Here is hidden for most.
