cleaning corrosion off an edge connector

O

obakesan

Guest
HiYa

I've got a laptop with a DVD decoder card (IBM 770 ED)
http://www2.gol.com/users/cjeastwd/decoderCard.jpg

... recently the card stopped working, so I pulled it out and noticed a faint
green spot on the edge connector, closer inspection revealed that it was
corrosion on the swipe (also appears on teh socket end)

http://www2.gol.com/users/cjeastwd/corrosion.jpg

sorry there's no scale here, but its bloody small, about 0.5mm for the swipe.

does anyone have any suggesiton on how to clean the corrosion off this to get
a good contact again, and how to prevent it comming back?

would something be available to coat it, to prevent oxidation happening again?

thanks


See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
 
On Mon, 17 Nov 2003 06:32:36 GMT, cjundieseastwd@powerup.com.au
(obakesan) wrote:

http://www2.gol.com/users/cjeastwd/corrosion.jpg

sorry there's no scale here, but its bloody small, about 0.5mm for the swipe.

does anyone have any suggesiton on how to clean the corrosion off this to get
a good contact again, and how to prevent it comming back?

would something be available to coat it, to prevent oxidation happening again?
Click to expand...
Try CO contact cleaner. Made by Electrolube.

Available from DSE Jaycar etc
 
It was a dark and stormy night, and obakesan managed to scribble:

HiYa

I've got a laptop with a DVD decoder card (IBM 770 ED)
http://www2.gol.com/users/cjeastwd/decoderCard.jpg

.. recently the card stopped working, so I pulled it out and noticed a
faint green spot on the edge connector, closer inspection revealed that it
was corrosion on the swipe (also appears on teh socket end)

http://www2.gol.com/users/cjeastwd/corrosion.jpg

sorry there's no scale here, but its bloody small, about 0.5mm for the
swipe.

does anyone have any suggesiton on how to clean the corrosion off this to
get a good contact again, and how to prevent it comming back?

I would use small amount of steel wool
Click to expand...

would something be available to coat it, to prevent oxidation happening
again?
Click to expand...
Any coating/electroplating should have been done at the factory. Is it a high humidity environment eg coastal or queensland.
Gold does not corrode.

gtoomey
thanks


See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
Click to expand...
 
very gently use a Pen Eraser. And then clean the residue with CO cleaner.
Use to work on Mainframes with the gold edge connections. You cant seal it
to prevent corrosion, as it will effect the conductivity. I would look at
what caused it, ie water ingress or as others have said look at humidity. If
you can get some packets of dessicated Silica gel and put inside, that will
slow any moisture related corrosion down. Try and get the blue sort that
turns pink.
"obakesan" <cjundieseastwd@powerup.com.au> wrote in message
news:bp9q2m$km1$1@kraken.itc.gu.edu.au...
HiYa

I've got a laptop with a DVD decoder card (IBM 770 ED)
http://www2.gol.com/users/cjeastwd/decoderCard.jpg

.. recently the card stopped working, so I pulled it out and noticed a
faint
green spot on the edge connector, closer inspection revealed that it was
corrosion on the swipe (also appears on teh socket end)

http://www2.gol.com/users/cjeastwd/corrosion.jpg

sorry there's no scale here, but its bloody small, about 0.5mm for the
swipe.

does anyone have any suggesiton on how to clean the corrosion off this to
get
a good contact again, and how to prevent it comming back?

would something be available to coat it, to prevent oxidation happening
again?

thanks


See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
Click to expand...
 
I agree with the ink eraser trick; use a Vaseline coating to
prevent it happening again.

--
Regards
Blue

Remove Z from email address to reply directly.
 
HiYa

lads, thanks for the advice, but perhaps the macro image fooled you, remember
that pin is SMALL less than 0.5mm in thickness ... and inside the connector
(not removable)

I live in Southport in SE queensland, but have only been there for about
8 months, before that I was in Tokyo.

vaseline huh ... interesting

In article <Yx4ub.14742$aT.11278@news-server.bigpond.net.au>, "aussieblu"
<zaussiblu@bigpond.net.au> wrote:
I agree with the ink eraser trick; use a Vaseline coating to
prevent it happening again.
Click to expand...
See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
 
It reminds me of the edge connector on and old Sinclair ZX81
computer RAM pack and the solution there was also to clean all
the pins with the ink rubber and apply a generous wipe of
Vaseline when reassembling. Given your "please remove undies for
reply" by-line I thought the Vaseline would appeal to you and
that you may have a ready supply :) .


--
Regards
Blue

Remove Z from email address to reply directly.
 
I guess you could try some spray PC board cleaner or electronic
spray contact cleaner lubricant or slide some emery paper
between the contacts.

--
Regards
Blue

Remove Z from email address to reply directly.
 
Use an old ink rubber, good thing is no excesive abrasion,

DONT DONT use steel wool, tooooo abrasive and leaves
shards that can get lost under IC pins to short out connections

Rubber - like dark green ink eraser rubber is the hing that works best !

I use em all the time cause otherwise the tin/gold contact
can cause a semiconductor, fixes network cards too :)

peter purple prefers palladium





obakesan wrote:

HiYa

I've got a laptop with a DVD decoder card (IBM 770 ED)
http://www2.gol.com/users/cjeastwd/decoderCard.jpg

.. recently the card stopped working, so I pulled it out and noticed a faint
green spot on the edge connector, closer inspection revealed that it was
corrosion on the swipe (also appears on teh socket end)

http://www2.gol.com/users/cjeastwd/corrosion.jpg

sorry there's no scale here, but its bloody small, about 0.5mm for the swipe.

does anyone have any suggesiton on how to clean the corrosion off this to get
a good contact again, and how to prevent it comming back?

would something be available to coat it, to prevent oxidation happening again?

thanks

See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
Click to expand...
 
HiYa

I know that a picture is supposed to paint a thousand words, but the reason
that I posted the picture, and described the feature size of the edge
connector was because its bloody small

can't possibly get a rubber in there ... the gap in the card is about 1 mm
and the pin is less than 0.5 mm and recessed into it.


I sorta wish I'd thought to add something for scale in that shot, as all the
replies so far have assumed its something big like an edge connector on an ISA
bus slot.



In article <3FBD7099.71494042@203.0.178.192>, Peter_purple
<purple@203.0.178.192> wrote:
Use an old ink rubber, good thing is no excesive abrasion,

DONT DONT use steel wool, tooooo abrasive and leaves
shards that can get lost under IC pins to short out connections

Rubber - like dark green ink eraser rubber is the hing that works best !

I use em all the time cause otherwise the tin/gold contact
can cause a semiconductor, fixes network cards too :)

peter purple prefers palladium





obakesan wrote:

HiYa

I've got a laptop with a DVD decoder card (IBM 770 ED)
http://www2.gol.com/users/cjeastwd/decoderCard.jpg

.. recently the card stopped working, so I pulled it out and noticed a faint
green spot on the edge connector, closer inspection revealed that it was
corrosion on the swipe (also appears on teh socket end)

http://www2.gol.com/users/cjeastwd/corrosion.jpg

sorry there's no scale here, but its bloody small, about 0.5mm for the swipe.

does anyone have any suggesiton on how to clean the corrosion off this to get
a good contact again, and how to prevent it comming back?

would something be available to coat it, to prevent oxidation happening
again?

thanks

See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
Click to expand...
See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
 
Try an old toothbrush, complete with its traces of toothpaste. Gentle
rubbing should get it out. If not do you have access to an ultrasonic
cleaner?

If the gunge is there now it'll probably come back - in the meantime, once
you get it off try WD-xx, the one for lubricating and aiding electrical
contact. My brain's on holiday today, I can't remember anything. :-(

Ken

"obakesan" <cjundieseastwd@powerup.com.au> wrote in message
news:bprlr5$79a$2@kraken.itc.gu.edu.au...
HiYa

I know that a picture is supposed to paint a thousand words, but the
reason
that I posted the picture, and described the feature size of the edge
connector was because its bloody small

can't possibly get a rubber in there ... the gap in the card is about 1 mm
and the pin is less than 0.5 mm and recessed into it.


I sorta wish I'd thought to add something for scale in that shot, as all
the
replies so far have assumed its something big like an edge connector on an
ISA
bus slot.
Click to expand...
 
Hi all,
try isopropyl alcohol (IPA), it can dissolve oxides. may need to let it sit
overnight though

use a toothbrush to agitate it and you could try a small file or similar if
need be as well
Cheers
Greg
..

"Ken Taylor" <ken123@xtra.co.nz> wrote in message
news:F2ewb.7615$VV6.179558@news.xtra.co.nz...
Try an old toothbrush, complete with its traces of toothpaste. Gentle
rubbing should get it out. If not do you have access to an ultrasonic
cleaner?

If the gunge is there now it'll probably come back - in the meantime, once
you get it off try WD-xx, the one for lubricating and aiding electrical
contact. My brain's on holiday today, I can't remember anything. :-(

Ken

"obakesan" <cjundieseastwd@powerup.com.au> wrote in message
news:bprlr5$79a$2@kraken.itc.gu.edu.au...
HiYa

I know that a picture is supposed to paint a thousand words, but the
reason
that I posted the picture, and described the feature size of the edge
connector was because its bloody small

can't possibly get a rubber in there ... the gap in the card is about 1
mm
and the pin is less than 0.5 mm and recessed into it.


I sorta wish I'd thought to add something for scale in that shot, as all
the
replies so far have assumed its something big like an edge connector on
an
ISA
bus slot.
Click to expand...
 
HiYa

In article <F2ewb.7615$VV6.179558@news.xtra.co.nz>, "Ken Taylor"
<ken123@xtra.co.nz> wrote:
Try an old toothbrush, complete with its traces of toothpaste. Gentle
rubbing should get it out. If not do you have access to an ultrasonic
cleaner?
Click to expand...
sadly no ...

If the gunge is there now it'll probably come back - in the meantime, once
you get it off try WD-xx, the one for lubricating and aiding electrical
contact.
Click to expand...

I'm beginning to think that the vasaline suggestion is looking better

See Ya
(when bandwidth gets better ;-)

Chris Eastwood

we tend to blame others for our problems
I think this is something we inherit from our parents

please remove undies for reply
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top