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

Thanks Helmut, that's very clear and helpful. Unfortunately neither of the links you sent have a SunRem 800K EPROM listed so I guess I'll have to wait for that to be available.

Geoff

On Mar 24, 2011, at 11:01 AM, Diogenes45 wrote:

>
>
> 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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