9 Jun
2007
9 Jun
'07
3:59 p.m.
Hello.
I have a partially defective HP 82901 drive.
I found the problem on the controller card.
I found a service manual on HpMuseum site, named
"82901-82902_CEServiceHandbook-Partial_17pages_1982.pdf". Following it, I
made all self tests and the problem is on the read circuit. I'm sure about
that because the two Tandon drives work fine with another controller card.
In this case, the service manual suggest to verify read oscillator
frequency. Unfortunately the section VI of the manual describing the
procedure is completely missing from the pdf file.
Perhaps someone has this manual? I would be very gratefull if someone can
help me to fix this drive.
Thank you very much.
Roberto