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Old 18th March 2007, 08:40 AM   #1
poynton is offline poynton  United Kingdom
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Default HELP ! Smelly Circuit Board !

Help !

I have a very nice little power amplifier, made by AIWA.

It smells !

There is an acrid smell which gets worse when it gets hot, either from use or just being in the sun. (It is not what I would call 'overheated transformer insulation' smell)

I cannot see any sign of overheating on the circuit board, no brown discolouration or cooked components.

Anybody any ideas ??

Would coating the board in conformal coating or varnish spray help ??

Andy
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Old 18th March 2007, 10:49 AM   #2
dnsey is offline dnsey  United Kingdom
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Any electrolytics getting warm?
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Old 19th March 2007, 08:17 AM   #3
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by dnsey
Any electrolytics getting warm?


None of the electrolytics looks like it is leaking.

Andy
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Old 19th March 2007, 08:37 AM   #4
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It's possible through age or contamination, the board is braking down into base components and offgassing. If this is so, there's nothing you can do besides replace it.

If it's something spilled on it, a chemical wash may help. Take a boo through a GC catalog.

Good luck!
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Old 29th March 2007, 08:04 PM   #5
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Do you own a cat?
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Old 30th March 2007, 03:19 PM   #6
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Quote:
Originally posted by XEAGLEKEEPER
Do you own a cat?
I have done, and after having my nose close to the carpet in that corner of the room behind the TV and all the electronic equipment, I know exactly what you mean...
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Old 30th March 2007, 03:31 PM   #7
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by cpemma


I have done, and after having my nose close to the carpet in that corner of the room behind the TV and all the electronic equipment, I know exactly what you mean...
Not content with used ladies leather bicycle saddles, you now have to resort to this....!!!!!
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Old 30th March 2007, 03:32 PM   #8
poynton is offline poynton  United Kingdom
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Quote:
Originally posted by XEAGLEKEEPER
Do you own a cat?
No, it's not that sort of smell ! It's certainly from the board.
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Old 30th March 2007, 04:40 PM   #9
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Maybe its plastics or fiberglass resin breaking down.I used to own one of those old xcelite multi-driver toolsets--it stunk so bad --and everytime i opened the toolbox --holy**** it reeked ended up throwing the set away.


Dave
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Old 21st April 2007, 07:05 AM   #10
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I know that smell…

I had the same problem with a RadioShack 4-Channel Mixer. Thing is, it DID smell like cat urine. I have four cats, so it's highly possible that at some point in time it was strangely only funny on the inside, as it was perfectly fine on the outside.

Could it be some sort of finishing that was applied to the PCB perhaps? Please let me know!
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