Re: Lisa 2: Bad Disk Drive

2005-11-20 Thread James MacPhail

*but* despite all my effort, the diske drive remain not functionnal. It
make some noise at startup, like if head are blocked... I will try
again to dismantle it and grease everywhere again... May be somebody
have a spare diske drive ? Or Macintosh drive may work ?

The 400K drive is the same as in the 128K and 512K Macintosh, so if you
have one of those (and it sounds like you do), you could connect it to see
if it works.

If not, then suspect the I/O board and connectors.

If another drive does work, then the original drive would seem to need
maintenance.

Other than the sticky grease problem, check to see if the pressure pad is
still on the drive. It is a small felt pad opposite the read/write head,
when a disk is inserted, it is the thing that holds the magnetic disk
against the head.

Sometimes the pressure pad falls off (or is torn off by forcibly ejecting a
disk when the grease is sticky).

Congratulations on fixing your off/on problem!

James

James MacPhail   Think not of engineering as art,
[EMAIL PROTECTED] but of art as engineering
Sigma Seven Systems Ltd.
[EMAIL PROTECTED]http://SigmaSevenSystems.com



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Re: Lisa 2: Bad Disk Drive

2005-11-20 Thread Jerome Vernet


Le 20 nov. 05, à 12:42, James MacPhail a écrit :



*but* despite all my effort, the diske drive remain not functionnal. 
It

make some noise at startup, like if head are blocked... I will try
again to dismantle it and grease everywhere again... May be somebody
have a spare diske drive ? Or Macintosh drive may work ?


The 400K drive is the same as in the 128K and 512K Macintosh, so if you
have one of those (and it sounds like you do), you could connect it to 
see

if it works.
Yes, I have a 128 and a 512k macintosh. Do you think that a 800k drive 
from a Mac Plus -less value than the 128 or 512 ;)- will work, at least 
as a 400 k drive ?


Other than the sticky grease problem, check to see if the pressure pad 
is
still on the drive. It is a small felt pad opposite the read/write 
head,

when a disk is inserted, it is the thing that holds the magnetic disk
against the head.


I saw the presure Pad, seems to be OK.

In fact, the drive don't spin, or try to spin then go off, and Lisa 
eject the disk with Error 23 or IO board error 39 (timeout).


This is done with both IO card.


Jerome 



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Re: Lisa 2: Bad Disk Drive

2005-11-06 Thread Jerome Vernet


Le 6 nov. 05, à 12:54, Philip Lord a écrit :

I think you need the upgraded roms to use 800k drives. I can't tell if 
you have theses.


I don't really want to use the 800k drive as a 800k, but as a 400k. My 
Lisa -an Lisa upgraded system- have D/A8 ROM, so no 800k support.


I saw the pics. The first think I would do is remove the leaking 
batteries from the I/O board, and clean the area below. Do this soon 
or the leaking acid will destroy your board.


That exactly what's I'm currently doing ;)! I train myself on the 
second CPU board -I received my Lisa with an additional PSU, additional 
CPU/IO/RAM/ and // board-.


Thanks for your help.


Phil





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