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From: Steve on 8 Jan 2010 13:45
Just picked up an HP 54201A digital scope. It basically works but
both input channels are dead. Will not recognize any inputs, and the
input self test fails. Don't have a service manual (and have been unable
to download one...on dial up here), and don't want to pay a bunch
of $$$'s for one to find out the hybrid circuits are bad.

Can anyone provide *just* the schematics for the input circuitry?
Has anyone else here been able to fix this problem?

Steve


From: f825_633 on 8 Jan 2010 14:27
Steve wrote:
> Just picked up an HP 54201A digital scope. It basically works but
> both input channels are dead. Will not recognize any inputs, and the
> input self test fails. Don't have a service manual (and have been unable
> to download one...on dial up here), and don't want to pay a bunch
> of $$$'s for one to find out the hybrid circuits are bad.
>
> Can anyone provide *just* the schematics for the input circuitry?
> Has anyone else here been able to fix this problem?
>
> Steve
>
>
HI,

Look for O/C inductors on the input stage - they are just
about the first component that the signal passes through,

you'll need good eyes - they'll be tiny....



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