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VFO Problem with a pre-loved TS-680S

Posted: Thu Jul 23, 2009 10:06 am
by jlwickham

I have purchased a used Kenwood TS-680S HF/6 Mx transceiver.

I have a problem with the frequency control system. When using either VFO-A or VFO-B, the flourescent frequency display
malfunctions (all display annunciators turn on) and the VFO system goes completely "haywire."

I have studied the block diagram of the frequency control system and I cannot establish which components are responsible for VFO-A and VFO-B.

I need to identify the proper components, so I can rectify this problem, or could it be because of a crash of the CPU which
controls the whole thing?

Are there any TS-680S owners out there who have had problems like this, and have been successful in rectifying the above

Thank you and 73, de

John VK3ZK