Re: 400KB Lisa floppy drive non operational- felt pressure pad is missing

I'm also having issues with a 400k drive (dated sept 1984) in one of my Lisas. The Lisa is a newer model and has an integrated ProFile above the drive. The floppy drive looks similar to another tested good Lisa floppy drive I have from an earlier model (dated dec 1983) but that drive has a daughter board next to it in it's own Lisa and doesn't seem to work as a replacement (seemed to exhibit random activity) in the newer one. I've also tried a more modern 800k drive which also didn't work (same issue). FInally I tired a 400k drive from a 512k Mac from approx the same era but same issue there. Can anybody provide me with guidance on which kinds of Floppy Drive should work so I can determine if the issue is with drive compatibility or possibly an issue on the I/O board?

Many thanks,
Geoff

On Mar 23, 2011, at 2:46 AM, Diogenes45 wrote:

> I have  just examined the 400 KB disk drive: Many of the sub miniature
> caps are dried-out (I have a special capacitor tester) - the signal
> from the PCB to the R/W heads and vice versa is very weak and
> distorted.
> I think it's futile to exchange all caps on the board... the best
> solution would be a replacement drive (or original Sony controller
> board) or even better: an upgrade to a 800KB drive.
> 
> Helmut
> 
> 
> On 22 Mrz., 22:56, "Terry Stewart" <te..._at_email.domain.hidden> wrote:

>>> Hello!
>>> I have a problem with my 400KB Lisa disk drive: The Read/Write heads
>>> have no contact to the magnetic media  because the pressure pad with a
>>> small round  piece of felt is missing now,and I have no idea where it
>>> is gone.... it's not inside the drive or the Lisa...I have searched
>>> everywhere, but I think, it's hard to find such a tiny piece in a
>>> large room....no luck so far after many hours of intensive search.
>>> Do you have any idea where I can get this small piece?

>>> Thanks!
>>> Helmut

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