Re: Smell of burned capacitors...

"TimPerry" <timperry@xxxxxxxxxxxxxxxxxxx> wrote in message
news:hN2dnb0j1uDZECnenZ2dnUVZ_tGdnZ2d@xxxxxxxxxxxxxxx
>
> "mc" <look@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:10Zsf.20603$Lb1.10693@xxxxxxxxxxxxxxxxxxxxxxxxx
>> I have a function generator that burned up a tantalum capacitor (which
>> shorted) and a 2-watt resistor. Fixing it electrically was no problem,
> but
>> there is a scorched place on the circuit board and a terrible smell.
>>
>> Today I made some progress against the smell. I had been airing the
>> generator out, covers off, in my attic (which is not hot at this time of
>> year), for about 3 days with little progress. Today I figured out that
> the
>> bulk of the smell was actually in a large calibration-instructions chart
>> that was glued to the inside of the case. I Xeroxed it and peeled off
>> and
>> discarded the original; much better. I've also given the whole circuit
>> board a spraying with contact cleaner and then with isopropyl alcohol.
>>
>> Any other ideas? The smell was so strong that even with all the covers
>> on
>> the function generator, it was quite noticeable throughout the workshop.
>>
>>
> simple green or other mild detergent applied with toothbrush or
> paintbrush.
> rinse with clean water. air dry or gently apply heat gun or hair dryer.
>
Tim has the right idea. The Collins radio restorers swear by Simple Green
for cleaning and restoration work.

I am cleaning a receiver (previous 25 year owner was a smoker). After doing
all of your steps with contact cleaner, Windex, isopropyl alcohol and
distilled water in key areas .. it still had a slight odor.

So, I tried Simple Green with cotton swabs and Q-tips. Brought up brown in
areas that I had previously cleaned. Simple Green also has a slight
pleasant odor. It's better -- but will take quite a bit of Q-tips and
cleaning still !

gb


.

Relevant Pages

  • Re: Smell of burned capacitors...
    ... > there is a scorched place on the circuit board and a terrible smell. ... > Today I made some progress against the smell. ... > the function generator, it was quite noticeable throughout the workshop. ...
    (sci.electronics.repair)
  • Re: Smell of burned capacitors...
    ... >there is a scorched place on the circuit board and a terrible smell. ... > Today I made some progress against the smell. ... > the function generator, it was quite noticeable throughout the workshop. ...
    (sci.electronics.repair)
  • Smell of burned capacitors...
    ... there is a scorched place on the circuit board and a terrible smell. ... Today I made some progress against the smell. ... the function generator, it was quite noticeable throughout the workshop. ...
    (sci.electronics.repair)
Quantcast