LIke the title says, I would like docs for big old Hitachi scope. I found schematics for the 20MHz version, The horrizontal circuitry seems to be the same, but not the vertical.
It is usable, but needs voodoo to operate. I think cleaning the pots would help, but don't want to make it less accurate than it is already.
Also, the probe cal test point is non functional.