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Sorry for the delay and thank you for your patience. My name is Michael. I will be helping you with your question today. I am an Expert in the Consumer Electronics category. If you feel this is not the best category for your question, let me know and I will forward it to the appropriate group of Experts.
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Can you clarify what model you are referring to as "a 765"?
I would agree, as.long as there is no other indication of the frequency jumping - meaning you don't actually see any changes, but you know they are hapenning.
Do you already have a schematic?
Is this something you would like to troubleshoot on a board level and repair yourself? I will provide you with whatever assistance I can.
I don't blame you. Many people have no idea that there are some significant benefits to analog in almost all contexts. Let me see if I can find a schematic.
Well, that certainly didn't take long. I haven't looked at it yet, but here is a link to the service manual for reference.