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AV Connector oxidized

Posted: Mon May 18, 2015 4:41 pm
by berry25
Hello all,

My raspberry bought in 2015..
Image

Audio/Video connector oxidized :(
Anyone have same problem?

Re: Connector oxidized

Posted: Mon May 18, 2015 5:18 pm
by rpdom
Mine is quite a bit older, but looks similar
avjack.jpg
avjack.jpg (24.37 KiB) Viewed 2054 times
I'm not bothered. I either run it headless or with HDMI.

Re: Connector oxidized

Posted: Mon May 18, 2015 5:45 pm
by solar3000
looks like a QC issue.
Can you scrape the contacts inside?
like with a Dremel bit?

Image

Re: Connector oxidized

Posted: Fri Apr 05, 2019 4:14 pm
by spock
i have the same problem on all of my raspberry pi 3bs. :( seems to only take 1 year or so.

Re: AV Connector oxidized

Posted: Fri Apr 05, 2019 7:21 pm
by Notupus
All my pies have this connector corroded but my 3b+ just ain't having it. They are corroded that much that they fail.

Re: AV Connector oxidized

Posted: Sat Apr 06, 2019 12:14 am
by mrreality13
also try DeoxIT 5% Spray Contact Cleaner,i use it to clean vintage stereos from 60/70's
https://www.amazon.com/Hosa-D5S-6-DeoxI ... B00006LVEU

Re: AV Connector oxidized

Posted: Sat Apr 06, 2019 3:52 am
by Milliways
It isn't "corrosion" it is oxidation of the cadmium plating, and is quite normal (and harmless).

If you use it it should work, but attempting to "clean" is likely to do more harm than good.

Re: AV Connector oxidized

Posted: Sat Apr 06, 2019 10:12 am
by spock
cadmium plating? :shock: :)

Re: AV Connector oxidized

Posted: Sat Apr 06, 2019 5:56 pm
by andrum99
Milliways wrote: ↑
Sat Apr 06, 2019 3:52 am
It isn't "corrosion" it is oxidation of the cadmium plating, and is quite normal (and harmless).

If you use it it should work, but attempting to "clean" is likely to do more harm than good.
Corrosion *is* oxidation. And after some googling, I'm rather surprised to find that it is still legal to use cadmium in electronic products, as long as it is below 0.01% or 100ppm by weight. Cadmium is certainly *not* harmless.

Re: AV Connector oxidized

Posted: Sat Apr 06, 2019 6:22 pm
by Burngate
For some reason, I thought it was silver rather than cadmium.

Re: AV Connector oxidized

Posted: Sat Apr 06, 2019 11:33 pm
by Milliways
Burngate wrote: ↑
Sat Apr 06, 2019 6:22 pm
For some reason, I thought it was silver rather than cadmium.
On reflection, it probably is - the fact remains the discolouration (which is common) does not seem to affect performance, and does not warrant drastic removal action. Simply inserting and removing a plug should be sufficient.

Re: AV Connector oxidized

Posted: Mon Apr 08, 2019 7:58 am
by andrum99
I'm hoping it is silver. I don't know what cadmium oxidation looks like, but it does look like silver tarnishing. I'm going to go with silver :D

Re: AV Connector oxidized

Posted: Mon Apr 08, 2019 8:53 am
by Imperf3kt
andrum99 wrote: ↑
Mon Apr 08, 2019 7:58 am
I'm hoping it is silver. I don't know what cadmium oxidation looks like, but it does look like silver tarnishing. I'm going to go with silver :D
I believe, like the other ports on the Pi, it is just steel.

Re: AV Connector oxidized

Posted: Mon Apr 08, 2019 8:56 am
by Heater
If it were regular steel it would rust. It for sure is not stainless steel.

It may well be steel but plated with something. And what that is is the question here.

Re: AV Connector oxidized

Posted: Mon Apr 08, 2019 9:30 am
by Burngate
Probably spring steel coated with silver.

When I was in OBs, we had a rather large number of ΒΌ" jacks - 19" racks full of them.
As you can imagine, the first week in June on the Epsom Downs is not famous for its weather, and anything that could corrode would.

The jack plugs were I believe brass which got cleaned with wire wool. The sockets were cleaned with a plug-shaped device that was mildly abrasive.