25 Jul
2004
25 Jul
'04
10:36 a.m.
Subject: Re: Anyone have/know of Persci drives, parts
1. There are no microcontrollers on the 270/277 series drives (I believe
that there were on the later 299 drive)
2. The board has a huge amount of analog circuitry on it, both for the r/w
head and the very complex servo system, and is not easy to troubleshoot.
3. None of the components on the board, including the 50 or so ICs, are
socketed.
No argument that the boards ultimately could be repaired, but it's not
nearly as easy as your post suggests. Plus there are 4 other major but
smaller boards on the drive in addition to the large main board.
I need some Persci 8" drives (model 270 or 277)
and/or parts to repair
them
for some systems. The part that I need most is the
very large circuit
board
on the right side of the drive. Anyone know of a
source? [I'm sure that
Are you actually missing this board? If not, then surely the existing one
can be repaired to component level -- AFAIK the only custom part is an
8048 microcontroller, which presumably could be copied from one in a good
drive (I don;t think the 8048 has any security features).
-tony