8 Nov
2005
8 Nov
'05
6:29 a.m.
For the 7970 tape drive there ARE the full schematics
on bitsavers...
the 7970 series was built by HP, the 7879 is was OEM-ed from STC .
I may have an STC manual somewhere, though it will take some digging.
They weren't particularly reliable even when they were new.
fwiw
By the mid 80s, almost none of HP's 'service' manuals had schematics.