Since my journey to TA4/US7IGN my very old (one of the very first serial number) ICOM IC-706MKIIG have had an issue – it started shut off when it warm up.


I am checked power wires, fuses, but all were okay, so I started to find same problems and its solutions in internet.

Thanks to Mike Nadeau – N1EQ I try to check same place on PLL board. And I found same issue was there!

Affected area, bypassed with a jumper wire:

I isolate place with nail polish:

The rubber pad under the PLL Unit caused corrosion of the “HV” trace. In my case it happened in humid and damp sites near Mediterranean sea. Now it is hard as a rock and cracked:

After repair my very old Icom is working as new.