[Test-Equipment] Need Help with HP Scope.

[John Barnes]

Hi,
 I have a proble with a HP scope from the 1720 series. These are 27MHz
scopes. The unit that I have is a 1727A.

I am unable to center the trace in the vertical direction. The gain seems
low. I think the Vertical amplifier is bad.

Can anybody help with either a vertical amplifier board or the custom ics
and hybrid part nos:

5081 -3022 and 5081- 3024

Thank you advance.

Sincere regards,

John Barnes