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Pin oxidization

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13 replies

by twiga

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I'm having trouble with poor contact on some of the pins/sockets of the connector on the rear of the CRT in a monitor. As these age with multiple heat/cool cycles and humidity, problems with oxides or other compounds on the metals emerge.
Most of these are not soluble in electrical spray cleaners... I have used propyl alcohol on a brush for the pins but the socket holes are too fine.
I know this used to happen more often in the days of valve amplifiers. Any suggestions please?

13 replies

by gigelul

About connector with holes:
-you can try to replace it or
-make again the solders on card, maybe there are cold solders.
-about cleaning holes I don?t know, maybe with a spray cleaner and with a connector, try to plug and unplug many times to clean the oxides. Also you can plug a blank connector and with an ohmmeter check the contacts and try to clean only contacts with problems.
Hope these help you.

by timthetoolman

Hi,

Yep, If you can wield a soldering iron, then use it. But be careful... The cable itself can be replaced.

By the way, how do you know its a contact problem? Wiggling the cord makes it work?

Anything else, and I'd be looking for other solutions as well...

Cheers,
Tim.

by shanghai sam

I would prefer not to replace the socket if possible. The assembly looks custom-made for Panasonic. Wriggling conecting cables does not change the effect but pulling the socket off and pushing it back on the CRT base stops the problem for a while

by otl

I agree, Replace the offending cord, clean the pins on the back of the CRT, and use an electric no-ox grease (make sure temp rated to 120 F) to seal the new connector. This will prevent oxidation on the new connector and old pins.

by rgrowcock

I can give you an old Army trick that still works, at least for pins. Do you have a wood pencil laying around anywhere? If so, use the eraser to clean the pins, it will clean the oxidation off real easy and cheaply. All you have to do is blow offthe part when you are done. I have used this trick while in the Army to clean off radio contacts, and I still use it today, and it still works.

The downside, is that I'm not sure how you would clean the sockets themselves. Sorry I can't help with this part of your problem.

Roger

by thechas

CAIG Labs makes several products that do a very good job of cleaning / restoring / protecting contacts from oxidation.

I have personally used their products for many years with excellent results.

I use a fine stiff artists brush, if needed to get into small sockets. Sometimes, just a single bristle.

Check your local electronics suppliers (commercial not retail).

I have also seen CAIG products from time to time at some of the web and mail order houses.
www.mcmelectronics.com lists 38 "CAIG" products.

Chas

by twiga

Can't find CAIG in Australian trade shops, I have been looking for Chemtronics products.... they used to work well.

by timthetoolman

Hi,

Really? Wiggling at the connection point doesn't fix, but removal and plugging it back in does?

I'd definitely be looking at another solution.

Often, modern monitors have a built in power saving option where they turn themselves "off" after a time of non-use.

Could it be that its not getting its "has been used" signal correctly? Did the drivers for your particular monitor get correctly installed? Or are they generic ones? You'll find that in the device manager...

If generic, then it would pay for you to locate and download the manufacturer specific ones...

Something else to look at, anyway...
Cheers,
Tim.

by twiga

The powersaving is turned off. Monitor has been correctly installed with it's own driver.

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