Re: Help restoring a 547 scope


felix_cantor@...
 
Edited

Hey there,

I uploaded an updated schematic to the link below with annotations in blue. Those readings that are "unstable" is because the DC voltage varies quite quickly up and down. Also the sweep that is indicated to be "unstable" wanders and moves around because of the unstable 5vDC component. I tried to use the hold-off adjustment in the test scope but couldnt bring it to a normal display. The sweep reading that is marked with an X is nonexistent, the test scope`s sweep remain at rest.


https://groups.io/g/TekScopes/photo/16016/2?p=Name,,,20,1,0,0

Let me know your thoughts please.

Thank you!

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