I have a Vertex 3200U mobile radio and it has a problem where the screen blinks the channel name off and on
and when you key the mic it beeps 3 times and says error on the screen. Any feedback would be appreciated.
Has this radio ever worked,
or this happened the first time you ever powered on?
Sounds like the VCO is out of lock.
Are all programmed frequencies within factory spec
for the version you have?
That model came in at least three versions:
A 400-430 MHz
D 450-490 MHz
F 480-512 MHz
You are lucky in that the service manual is
available several places on the web in pdf format.