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

If you choose the address below, you can read everything about the Lisa Lite card.
It's not necessary if you have a Lisa 2/10 aka XL.

http://lisafaq.sunder.net/lisafaq-hw-io_substitution.html

If you have a Lisa 2/10 then your internal HD should be an Apple Widget hard disk. Otherwise you might have a SUN HD20 as a replacement instead.
(Or this: http://lisafaq.sunder.net/lisafaq-hw-exp-scsi_devices.html)- SCSI hard disks don't work with Lisa OS, Lisa OS will simply ignore them. SCSI drives only work under MacWorks(Plus) and higher.

If you are using a Mac 800 KB floppy drive in the Lisa, you need a different disk controller 800K EPROM. You can get it from: http://www.vintagemicros.com or:
http://stores.ebay.com/VintageMicros

BTW: You should first test your 800K floppy disk drive in a Macintosh (I use my trusty old Macintosh Plus) all 800KB Mac drives are working in a Lisa, the 400KB drives are fully functional in a Mac Plus (or in an earlier Mac128K, 512K= Fat Mac). Some of them even work in Macintosh II(x) or IIcx. If the 400KB floppy disk drive works properly in a Mac Plus under OS 6.x or 5.x, it should be running fine in a Lisa as well.
If the 800 kb floppy drive is fully functional in a Mac, it should work flawlessly in a Lisa 2/10 with a 800KB (SUNrem) disk controller EPROM. I hope, this helps you a little further.

Helmut

On 24 Mrz., 16:11, Geoff Barrall <geoffbarr..._at_email.domain.hidden> wrote:
> Can you tell me where I could get the SUNrem ROM you mentioned? Will this EPROM work with a standard 800k drive like those used in the Mac Plus and Mac SE?
> I'm not sure what a Lisa Lite card is. The Lisa seems to be a 2/10 and the I/O board supports both a integrated Profile and 400k drive.
>
> Very much appreciate your help.
>
> Geoff
>
> On Mar 24, 2011, at 5:59 AM, Diogenes45 wrote:
>
>
>
> > Hi Geoff,
>
> > I had similar problems with my 400KB and 800KB drives- you should have
> > a known good 800KB drive (test it in your Mac Plus or Mac 512 KB etc.)
> > Then you will need the SUNrem 800KB floppy disk EPROM for the Lisa I/O
> > board, otherwise your 800KB floppy won't be recognized by the Lisa.
> > As far as you told here you should have a Lisa Lite card.
>
> > Helmut
>
> > On 23 Mrz., 17:20, Geoff Barrall <geoffbarr..._at_email.domain.hidden> wrote:
> >> 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:
> >>>> Helmut,
>
> >>>> I do have two non-working drives which aren't worth much to me.  If you like
> >>>> I could have a go at extracting the pad from one of them and posting it to
> >>>> you?  It's so small posting charges will be trivial.   Would you like me to
> >>>> give it a go?
>
> >>>> Terry (Tez)
>
> >>>> ----- Original Message -----
> >>>> From: "Diogenes45" <helmut_p..._at_email.domain.hidden>
> >>>> To: "LisaList" <lisalist_at_email.domain.hidden>
> >>>> Sent: Wednesday, March 23, 2011 3:28 AM
> >>>> Subject: 400KB Lisa floppy drive non operational- felt pressure pad is
>
> >>>> missing
>
> >>>>> 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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