Marty -
No service manual that I know of.
Check supply voltages.
DeoxiT the switches.
Check the 74192 divide-by-N (U3) and associated control
logic (U4 & U8) on the A300 Digital board. Board closest to
the back. I have seen more than a few of the 74192 chips
fail. Don't know why.
Check t
The .5 frequency does not function correctly instead of switching .5 mhz it
switches a full 1 mhz. Everything else seems to work o.k. Is there a tech
manual downloadable any where?
Thanks
Marty
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