i am repairing an ICON 2 meter all mode rig.
it has PLL problems at the moment.
i have track down the area of the problem
while doing so i noticed something strange
with the 1/10,1/11 scaling chip., the input
of the chip is getting driven by a buffered
and amplified stage of around 133 Mhz,,how ever,
it seems the input pin of this chip is generating
a signal of its own?, when testing it i get ~ 30Mhz
steady on it and its dominating hte 133 Mhz thats
suppose to be there. it also looks dirty!
is this chip suppose to be chopping its input
like that? i know its coming from the chip because
when changing the 133 freq a little this 30 mhz
remains constant!.. could this be my problem with
the PLL circuit not working? currently the programmable
chip form the CPU is triggering an UNLOCK state and this
small scaler chip is what supplies this programmable
chip.

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