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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: SMN on May 06, 2016, 06:46:46 AM

Title: Amiga 500 keyboard membrane repair and other stuff
Post by: SMN on May 06, 2016, 06:46:46 AM

Greetings !

I recently took apart my Amiga 500 keyboard for cleaning and inspection since my escape key did not work.
Can it be repaired?
[ATTACH]5012[/ATTACH]
Im also looking for software in adf format  to test the functionkeys ..

best regards..

Marius

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: kolla on May 06, 2016, 01:04:13 PM

Quote from: SMN;808016

Greetings !

I recently took apart my Amiga 500 keyboard for cleaning and inspection since my escape key did not work.
Can it be repaired?
[ATTACH]5012[/ATTACH]

Just solder over a small bridge? There are also pens with conducting ink you could try.

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: rkidd7952 on May 06, 2016, 01:56:37 PM

Quote from: kolla;808024

There are also pens with conducting ink you could try.

I've had good luck with this approach.  I used a CAIG CircuitWriter pen to repair the membrane from a Sun keyboard a while back.

Robert

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: SMN on May 06, 2016, 08:47:42 PM

Thank you guys for fast replay, :D

So.. how do you use this conductive pen?

Regards

Marius

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: rkidd7952 on May 07, 2016, 04:40:44 AM

Quote from: SMN;808038

So.. how do you use this conductive pen?

Now that I look through my toolbox, this is what I used on the membrane: http://www.bareconductive.com/shop/electric-paint-10ml/ (http://www.bareconductive.com/shop/electric-paint-10ml/).  I don't remember what I used the CircuitWriter for, but they're more or less equivalent.

The trace that runs out to the pad is a copper strip with a protective covering (conformal coating) that makes it appear light green.  Carefully scrape back the covering on either side of the break to reveal the copper, then draw a line with the pen or paint to connect the copper on either side.  You probably don't need to remove too much of the coating.  I'd try 1-2mm on either side of the break.

(In the Sun keyboard, the trace was made of exposed carbon or something similar that got washed out by a spilled drink.  It was just a matter of painting over the trace, no scraping was necessary.)

Robert

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: SMN on May 07, 2016, 11:00:03 PM

rkidd7952 and Kolla.. I will check this out.

Thanks!

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: Kernel on October 07, 2017, 11:07:26 PM

How did this turn out?  I just found my ESC key has a break in pretty much the exact same area and now I need to attempt to repair... worried I might make it worse trying to scrape the green covering away.

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: Acill on October 08, 2017, 05:15:58 AM

I'd bet I could fix that for you guys if in the USA. I would charge for this, just the cost to return ship is all. If you can solder well, a SHARP NEW hobby knife blade with a light touch will get the greet off and expose the trace. You need to use very low melting point solder too.

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: orange on October 08, 2017, 05:52:17 AM

go to car store and buy 'rear window defogger repair kit'.

Title: Re: Amiga 500 keyboard membrane repair and other stuff
Post by: BLTCON0 on October 10, 2017, 02:06:36 PM

Quote from: SMN;808016

Greetings !
Im also looking for software in adf format  to test the functionkeys ..

Just use MeMacs - in command mode the function keys produce regular characters, so they can be tested.