Repair conductive area on rubber keypads?
David Wells
I see a lot of units come into my shop with bad keypads. The problems seems to
be the conductive surface that contacts the keyboard PCB looses its
conductivity. I would buy new pads but they are no longer available. Painting
a conductive coating on them seems to work, but does anyone else have this
problem and a better solution? I looked into having some rubber keypads made
but they wanted $6kilobucks just to do the tooling! Post here or e-mail.
Thanks.
Dave
Mike Gallo
Try:
I haven't been there for a while but I seem to remember him having a
solution to your problem with some special chemical. It was too pricy for
the one keypad I had a problem with, but if you do it for a living it
might be worth it.
Ian Price
In article <4q7kb7$dnc...@pine222.cruzio.com>, David Wells
<da...@cruzio.com> writes
I repair a lot of calculator key boards.
I usually find that striping the key board and blowing out the dust and
cleaning both the P.C.B. and the conductive rubber surface with a good
quality switch cleaner does the trick.
Be careful not to use a cleaner that dissolves the rubber though.
Ian Price, Lichfield, England. (Birthplace of Dr Samuel Johnson)
and More Pubs than people (Well nearly)
Email i...@lich.demon.co.uk
JStev55598
In article <tr723HAE...@lich.demon.co.uk>, Ian Price
<i...@lich.demon.co.uk> writes:
I have found that if the rubber membrane looses it's conductivity it can
be repaired
by stcking on a small square of self adhesive aluminium foil.
This gives a permanent fix.
I have also tried condutive paint but this seems to fail after a few
months maybe this is due to oil in the rubber?
Jon stevens.
Stan Cramer
Greetings!
What a great idea! Thanks for the tip! I haven't ever seen self-adhesive
aluminum foil at any hardware store or supermarket. Do you remember a
brand name? I suppose that I could use tiny drop of contact cement or
superglue, but the the self-adhesive type would be a bunch easier to use.
Let us know if you can!
Stan Cramer
JStev55598
In article <4qikm6$n...@news.ios.com>, Stan Cramer
<stv...@Gramercy.ios.com> writes:
Well Stan I am in the UK so I can't help you on that front.
I mine from Maplin electronics , the manufacurer is Ewan Jones (If that
is any help).
It's worth looking in the "service aids" or equivalent section in some
elctronic catalogues over there, or perhaps someone reading this knows of
somewhere.
Your idea of using sement would work ok but may be a bit more tricky.
Jon stevens.
Mike Gallo
I have tried to glue aluminium foil to the pads, but have had limited
success. It seems to hold for a few months but then comes off. I have
tried various adhesives with the same result.
Edward Kravitz
3-M makes aluminum and copper adhesive tapes in various widths. I found
the copper extremely useful, since you can solder to it.
-
ED K. KB2NSP HAT...@prodigy.com
Jeff Buttler
...
> >
> >I have found that if the rubber membrane looses it's conductivity it can
> >be repaired
> >by stcking on a small square of self adhesive aluminium foil.
> >This gives a permanent fix.
> >I have also tried condutive paint but this seems to fail after a few
> >months maybe this is due to oil in the rubber?
> >
> >
> >
> >Jon stevens.
>
> Greetings!
>
> What a great idea! Thanks for the tip! I haven't ever seen self-adhesive
> aluminum foil at any hardware store or supermarket. Do you remember a
> brand name? I suppose that I could use tiny drop of contact cement or
> superglue, but the the self-adhesive type would be a bunch easier to use.
>
> Let us know if you can!
>
> Stan Cramer
3M makes EMI/RFI foil shielding tape, type 1181, that seem would work
very well for this. I've seen it in the Newark catalog and have a roll
of it around somewhere. Next time a bad keyboard comes in I'll have to
try it.....
Thanks
WEBPA
If you're looking for aluminum or copper foil tape with adhesive on it,
visit your local hardware store, in the plumbing and/or roof rain gutter
sections. Alternatively, try an auto parts store. I've found a variety
of adhesive foils (including stainless steel) in these kinds of
establishments.
As for as repairing conductive rubber keypads: I've not used the metal
tape method, but will probably try it. I've had great success with a
thorough cleaning and light buffing of the contact area with very find
(1000 grit) wet/dry sandpaper.
Paul Weber
we...@aol.com
webpa
Shawn Call
jstev...@aol.com writes:
>>What a great idea! Thanks for the tip! I haven't ever seen self-adhesive
>>aluminum foil at any hardware store or supermarket. Do you remember a
>>brand name? I suppose that I could use tiny drop of contact cement or
>>superglue, but the the self-adhesive type would be a bunch easier to use.
They sold the stuff for Reel To Reel tapes, although it I think it was
discontinued earlier this year, you may be able to find some on
clearance-special.
Onat Ahmet
In jstev...@aol.com's opinion;
: I have found that if the rubber membrane looses it's conductivity it can
: be repaired
: by stcking on a small square of self adhesive aluminium foil.
: This gives a permanent fix.
: I have also tried condutive paint but this seems to fail after a few
: months maybe this is due to oil in the rubber?
:
: Jon stevens.
I tried the same thing, but have found that the tape
comes off after a year or so (not a big deal!). The
reason seems to be that I don't push the switches
straight down, but forward then down (more like swiping).
This seems to dislocate the foil eventually.
Also, you might get "catastrophic failures": the foil
under the "volume-up" button comes loose, and
shorts its contact permanently!!! You have the whole
neighbourhood up before you can reach the volume
down button on the TV......(no, the remote
does not function anymore at that point!)
I guess this is because the foil is hard but the
membrane is soft; it is difficult to get a good
bond between them...
| Ahmet ONAT Kyoto Univ. Japan |
| E-mail : on...@kuee.kyoto-u.ac.jp |
| WWW page : http://turbine.kuee.kyoto-u.ac.jp/staff/onat.html |
| My 6 leg walker, RC airplanes & more in home page |
JazzMan
I've used metallized duct tape dots punched out with a hole punch to
repair my Panasonic KX-T3620H's carbon button keypad. Only drawback is
the adhesive eventually oozes around to the conductive side, usually in
about 6 months or so.... jsavage
stan blazejewski
>In article <4qj5d5$a...@newsbf02.news.aol.com> JStev55598,
>jstev...@aol.com writes:
>>>What a great idea! Thanks for the tip! I haven't ever seen self-adhesive
>>>aluminum foil at any hardware store or supermarket. Do you remember a
>>>brand name? I suppose that I could use tiny drop of contact cement or
>>>superglue, but the the self-adhesive type would be a bunch easier to use.
>You may be able to pick up some "sensing tape" at a Radio-Shack near you.
>They sold the stuff for Reel To Reel tapes, although it I think it was
>discontinued earlier this year, you may be able to find some on
>clearance-special.
I'm pretty sure that Tandy still sell that foil used for windows &
alarm systems, that may work also.
Ever looked at a world globe?
Australia isn't "down under", it's "off to one side"!
Mike Morris
:From: JazzMan <jsa...@airmail.net>
:Subject: Re: Repair conductive area on rubber keypads?
:Date: Fri, 28 Jun 1996 19:51:37 -0700
In article <31D49A...@airmail.net> JazzMan <jsa...@airmail.net> writes:
:Shawn Call wrote:
:>
:> In article <4qj5d5$a...@newsbf02.news.aol.com> JStev55598,
:> jstev...@aol.com writes:
:> >>What a great idea! Thanks for the tip! I haven't ever seen self-adhesive
:> >>aluminum foil at any hardware store or supermarket. Do you remember a
:> >>brand name? I suppose that I could use tiny drop of contact cement or
:> >>superglue, but the the self-adhesive type would be a bunch easier to use.
:> You may be able to pick up some "sensing tape" at a Radio-Shack near you.
:> They sold the stuff for Reel To Reel tapes, although it I think it was
:> discontinued earlier this year, you may be able to find some on
:> clearance-special..
:I've used metallized duct tape dots punched out with a hole punch to
:repair my Panasonic KX-T3620H's carbon button keypad. Only drawback is
:the adhesive eventually oozes around to the conductive side, usually in
:about 6 months or so.... jsavage
The best solution of all was developed by a guy in Chicago for fixing the
keypads in modern business telephones - some of which are $100+ each...
send email to mi...@sandman.com and ask him for info on his keypad fix.
Richard Symonds
stan...@netspace.net.au (stan blazejewski) wrote:
>Shawn Call <ca...@butler.qrp.com> wrote:
>>In article <4qj5d5$a...@newsbf02.news.aol.com> JStev55598,
>>jstev...@aol.com writes:
>>>>What a great idea! Thanks for the tip! I haven't ever seen self-adhesive
>>>>aluminum foil at any hardware store or supermarket. Do you remember a
>>>>brand name?
>snip
Hi All,
Just released on the market here in New Zealand is a liquid formula
(and no, it is not silver paint) for restoring the conductive pads.
It has been developed here and is being marketed by an electronic
parts supplier (TradeTech). Not cheap, at about $40 (NZ) in a bottle
that looks like a nail varnish applicator type.
Have just ordered some for work and I have a remote just come in with
just one pad worn out, so I'll report back here after I try it out.
Cheers
Richard
Ken Koskie
David Wells wrote:
>
> I see a lot of units come into my shop with bad keypads. The problems seems to
> be the conductive surface that contacts the keyboard PCB looses its
> conductivity. I would buy new pads but they are no longer available. Painting
> a conductive coating on them seems to work, but does anyone else have this
> problem and a better solution? I looked into having some rubber keypads made
> but they wanted $6kilobucks just to do the tooling! Post here or e-mail.
> Thanks.
>
Supposed to contain enough material to repair 200 contacts. Their part
#20-2070