Apple lisa repair.

[Patnukem]

crisis adverted. a couple of caps switched out from the power supply seemed to fix it. and I got to the start up from area and could move the mouse so the mouse is working!

UPDATE! I took the top of and used my fingers since I know some of the keys need "refoaming" and entered service mode and got it to let me type out a bit and all the keys seem to work (Electronically) Now I need to put new foam on. The mylar disks look a bit worn is (Some are flaking the metal parts off) is this going to be a big deal when I transfer them to new foam?

 

[JRL]

There's also this:

Link

But might be too expensive for you.

 

[Patnukem]

I am going to build an IDEfile (http://john.ccac.rwth-aachen.de:8000/patrick/idefile.htm), it sounds like it might be fun to build something like that. Someone on the lisalist built one so I know I can at least ask them for help if need be.

 

[Patnukem]

hmm its spazing out again I think It must be the caps in the power supply I skipped I hope that new ones will fix it.

 

[JRL]

Oh yes, a real mouse:

Link

 

[RandomDamage]

I replaced the foam in a Lisa keyboard not too long ago. I did all of the keys and it was quite time consuming, but in the end they all worked fine and it was worth it.

I used some 1/8" thick foam mounting squares from a craft shop and trimmed them to fit. Ideally, if you could find something that was precut to the approximate size of the disks, that would help quite a bit.

The old foam just disintegrated while I worked with it. I used an Exacto knife to scrape as much of the old foam off of the mylar and plastic disks. It isn't necessary to get them absolutely clean.

Good luck! (Though it sounds like your power supply is a more pressing issue.)

 

[Patnukem]

it is I wish I could find the pesky 390uf 200v caps locally. (the only electrolytic caps in the ps I have not replaced) and the closest I have are 470uf 200v.

Although I will need to buy some stuff for the idefile I am making, just etched my first board for this project and came out better then I had hopped although a bit off center from the other side.

 

[JRL]

Lisa Office System:

Link

 

[Patnukem]

ill be watching it if it does not get too $$, I do not have a job right now so money is tight but it is only a little ways away. I also have to re etch a new board the one I made like I said was off center but the holes were ok but to many leads I would have to fix because the holes broke them. so I will make a new board (And actually match it properly, last time I drilled something else and it screwed me up).

Then I have to figure out how to solder the stupid IC holders in (The bottom layer is easy but the top is a pain) I think I will try to find a fine tip for my soldering iron and get some solder that is thiner gauge so I can shove it in there.

 

[JRL]

So how is the Lisa going?

 

[Patnukem]

well it stopped working again (I have replaced every cap on the the power supply but the two massive ones) so I will try to find some replacements for them (390uf 200v) all of them seem to be way over priced. but I hope that will bring it back to life again.

I have not had a chance to repair the keyboard, still waiting for my self to fix the lisa.

I have just gotten the stuff to re-etch the IDEfile board. I hope this time I can line it up right so the holes match up. my last board messed up somehow and bubbled up and ruined the copper luckily radio shack exchanged it for a new one I have taught my self how to cover the copper traces on the old board with solder, I have also been using it to practice soldering the ic sockets in since it is a double sided board it will be hard to solder unless i link each hole with the opposite side with a small wire to ensure conductivity. it has help my though hole soldering skills as well they look more professional.

 

[GnatGoSplat]

There's usually a pair of 330uF 200V(?) caps in PC power supplies that might work for you. Just about every junk AT/ATX PSU I've come across has them. They might work in place of the 390uF caps.

 

[Patnukem]

just my luck the two I have taken apart have had the 470uf 200v ones in them, I was thinking of using these in series with a 100uf 200v to make an approximate of 370uf

small Update, after digging though my large collection of electronics I remembered seeing some 100uf 200v caps, So i will combine them with the 220uf 400v caps I have to make a replacement that is less then 20% off lets hope this fixes it.

 

[JRL]

Well good luck anyways.

 

[Patnukem]

yeah I found the problem a loose cap was causing the problem!

 

[JRL]

I think you should be able to buy foam for the keyboard at Michael's or a similar crafts store and cut it to fit the keyboard.

So what does the Lisa do on startup now? There is also someone selling a Profile in the Trading Post.

 

[Patnukem]

im actually going to buy the profile talked to him yesterday about it, so that is awesome, the install disks will format the profile for me right? I know you can not do the low level format without the apple III.

I actually have been using this weather striping foam for the keys it is sticky on one side and seems to work well on the ones I have fixed already although I think I may have broke the caps lock though, but I have it kinda working, i think the pin inside used to have a spring in it and it must have shot across the room so now it does not want to click and stay down.

it is turning on now and the first keys fixed were the apple and s keys so I can boot to service mode and can test the keys that way. I also found some new tdk ds/dd unformatted disks 50pk for a bit over $20 with shipping. then I can make all the disks I need.

I still want to make my idefile and have a new pcb ready to etch and the holes all lined up well so this one should work.

 

[JRL]

So does the Profile work?

 

[Patnukem]

he said he was not sure but it did spin up with ready light on. i would want it even if nonworking i can put my idefile in it, i did not hear back from him yet so i wrote him an email asking him how i should send him paypal, hope he writes me back soon

 

[JRL]

Hey patnukem, do you want a Lisa-ImageWriter cable? (One of these)

funkytoad is giving away an ImageWriter too.