Hi everybody.
I have a problem that I am not able to trace on my recently acquired old Tek 465 scope.
Initially ,operating on CH2 , pressing the INV button , the trace disappeared. I adjusted , as per service manual section 6 page 15 subsection 12 ,
the Invert Balance trimmer R215, and after the trimming ,actually the trace only moved not more than half division operating the CH2 INV button.
But I observe that the trace is not inverted. The only way to see it inverted ,after pressing the INV button is to use both channel ,on the alternate mode, trigger on CH1 (with the two signals frequency related).
Is there anybody who can explain this behavior of the scope , and show me the direction to follow to fix the problem?
Thank you for your help