Hi Don,
>It would seem that there are a couple of possibilities for your
>problems: - a damaged lower head or read electronics that do not
>permit the drive to find a directory or - less likely - incorrect
>strapping for drive select and the variables on the drive board.
I doubt it strapping, as these are the original drives that were
installed by Morrow.
I thought it was odd that both of these drives (and only these two)
failed with exactly the same symptom - My guess is that something
in the read electronics is prone to an age related fault - I was
hoping that someone might respond with something like "Oh yeah -
thats a known problem with those drives - check capactor x".
>The rather brief Service Guide that I have for the Morrow MD
>series provides no detail at all on the drives. However, they do
>caution to replace the A and B drives in the position that they
>were removed from such as to not cross up their identity to the
>computer. No other manual that I have provides any information on
>the TEC FB-503 beyond the fact that it is a half-high 5.25" DS
>drive with a 360k capacity.
It is an odd configuration with a separate cable and terminator
for each drive ...
Any chance you could be talked into copying or scanning that service
manual?
Do you have other info on these systems (Technical or otherwise)?
Were you involved these machines? Looking to collect as much info
as possible.
Regards,
Dave
--
dave04a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Vintage computing equipment collector.
http://www.parse.com/~ddunfield/museum/index.html
Received on Fri Jun 25 2004 - 07:04:53 BST