[s-cars] infra-red key

[Bjørn Ødegård]

The contact is a dome switch element. (Click dome) The biggest problem
with these, (I've worked 10 years with a keyboard manufacturing company,
www.keytouch.no, and most domes do 5 million ops. easily..) are that
they have to be ventilated to work. (see the little canal to the left
lower side of the dome, on the last picture.)
This ventilation also picks up dust and other contaminations, and the
point where the 'dimple' meets the PCB gets dirty. The finger contacts
are self-cleaning. A pencil eraser is a good idea,  as you don't really
want to remove the gold plating on the PCB.. (I actually saw a jerk
sanding off all the gold from the edge connector of a PC card on time.
'It looked dirty' he said. The card never worked again.. ;o))

If some pins of the components on the PCB are corroded, (some people
perspirate a good deal in their hands, or carries the keys in their
pocket all day..) just clean it off with electronics cleaner and a
toothbrush. It's a big chance it'll work again.

Just my .01?..

Bjorn  :o)
'92 S4 (with DEFA RF security remote. One remote, three cars.)


----- Original Message -----
From: "Franco Barber" <feb at febsun.cmhnet.org>
To: "David Glasser" <divad at rcn.com>
Cc: <S-CAR-List at audifans.com>
Sent: Wednesday, February 26, 2003 11:29 PM
Subject: Re: [s-cars] infra-red key


> I opened up my key, took some pictures, and tossed together
> a quick web page.
>
> See this URL:  http://elektro.cmhnet.org/~feb/audi_ir_key/
>
> Franco
>
>
> On Wed, Feb 26, 2003 at 04:43:23PM -0500, Franco Barber wrote:
> > I had a non-functioning IR key on a 95 A6 that I bought used.
> >
> > Just like your case, changing batteries didn't do anygood.
> > I don't know about the IR bulb illuminating:  I can't see it
> > illuminate even when it's working.
> >
> > In my case, I was able to get the key working again by disassembling
> > it and cleaning the contacts on the button.  The contact on the
> > key is made by a very simple switch that looks remarkably like
> > the contacts on an Atari joystick from 1982.  A triangular piece
> > of metal that is arched, and when you push down on the button this
> > piece of metal is flexed and makes contact.  I think there was
> > a piece of clear cellophane holding it in place.
> >
> > I took the contact piece off, cleaned it with a pencil eraser,
> > and put it back together.  Wish I had a picture to send you,
> > but I didn't have a digital camera when I did this two years ago.
> >
> > I can't remember exactly how the key comes apart, but I think
> > the side with the button on it pops off like a cover, leaving
> > the core of the key (with the batteries on it and the key shank.)
> > Take the battery cover off and you'll see that latch that holds
> > it together.
> >
> > You might also try cleaning the battery contacts first...
> >
> > Franco
> >
> > On Wed, Feb 26, 2003 at 04:24:16PM -0500, David Glasser wrote:
> > > One key works, other doesn't.  Batteries changed.  Programming per
manual
> > > failed to solve.  Infra red bulb in broken key seems not to be
illuminating.
> > > Any BTDT's?
> > >
> > > Dave Glasser
> > > 95 S6
> > > www.daveglasser.com
> > > Louis, Duke, Bird, Diz, & Trane live on through
> > > the work and efforts of today's jazz musicians.
> > > Please continue to support the future of this great
> > > American art form.
> > >
> > >
> > >
> > > _______________________________________________
> > > S-CAR-List mailing list
> > > S-CAR-List at audifans.com
> > > http://www.audifans.com/mailman/listinfo/s-car-list
> > >
> >
> > --
> >
>
> --
>
>
> _______________________________________________
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>
>



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