Re: Lisa won't stay off (was Lisa 2: Bad Disk Drive)

2005-11-20 Thread Jerome Vernet

Le 12 nov. 05, à 00:33, James MacPhail a écrit :



This was an aside to another problem, so it looks like it didn't get 
any

attention:


when I switch the Lisa off, it goes off then on immediately.


I have seen a couple of causes for this problem, ones that come to 
mind are:


1) Damaged (broken) traces on the I/O Board due to corrosion from 
leaking

batteries.

After removing battery, and cleaning as much as I can the board, it's 
OK !


I also clean all socket.


Great !

More over, I test second second board (Cage, CPU, IO, 2 RAM Card and 
one // card) and it's working also :happy:.


This second board as a different ROM version (H/A8) athough the first 
one is D/A8. Is there any real differences ? Which one is better ?


When started with the H/A8 board, the Lisa will only ask to boot on 
drive 2, although it let choose Drive 1 (which does'nt exist ?) and 
Drive 2.


Both Profile start on MacOs.

*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 ?



Lisa is my best piece of old computers, far away from my other Apple 
pieces likes Apple II, macintosh 128 What a beautiful thing !



Jerome 



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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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Lisa won't stay off (was Lisa 2: Bad Disk Drive)

2005-11-11 Thread James MacPhail

This was an aside to another problem, so it looks like it didn't get any
attention:

when I switch the Lisa off, it goes off then on immediately.

I have seen a couple of causes for this problem, ones that come to mind are:

1) Damaged (broken) traces on the I/O Board due to corrosion from leaking
batteries.

If your I/O Board once had batteries on it, check the continuity of the
traces in that area carefully.

If it still has batteries on it, you should probably remove them and clean
the circuit board in that area before battery leakage causes (more) damage.

The battery is not required for startup or operation of the Lisa; it is
only to keep the clock running and preserve some preference settings in
RAM. Unlike a modern computer whose clock can run from the battery for
years with no external power, the Lisa battery only lasts for a few hours
when external power is interrupted.

2) Bad COPS, or perhaps poor contact with its socket.

It may be enough to remove and re-insert the COPS to improve the connection.

If not, replace the COPS with one from another I/O board... if it still
doesn't work, then it probably isn't the COPS.

3) A couple of other parts on the I/O board can fail causing this sort of
problem, so if the above don't help, let us know and we can start
trouble-shooting.

Good luck!

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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Lisa 2: Bad Disk Drive

2005-11-06 Thread Jerome Vernet

Hi,

After years, I finally get a Lisa 2. It come with 2 working Profile 5 
Mb, loaded with Macwork (?) and MacOs 5.

I Have two problems:
- the 3,5 disk drive seem to be dead. Make some noise at startup, but 
do not spin... I've dismantle it, cleaning grease, add grease, but no 
way Like if the head driver was dead.
Can I put a 800k drive from a MacPlus in it ? Even if it will be 
recognized as a 400k drive.


- the on/off switch: when I switch the Lisa off, it go off then on 
immediatly.


Any advice ?

My Lisa: http://perso.wanadoo.fr/jerome.vernet/specs/lisa.htm


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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