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3rd January 2010, 07:51 PM
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#3 | |
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diyAudio Member
Join Date: Feb 2008
Location: East Midlands, England
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Quote:
Look for what could well be dried liquid or any form of liquid spill, if you can't see any you should be ok. This doesn't mean that the capacitors are still functioning as they should, just that they haven't "leaked" electrolyte  The capacitance value could still be a country mile out due to age & heat.
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3rd January 2010, 07:55 PM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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These photos show a (defective) vented capacitor (on the right) and one that's intact.
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4th January 2010, 12:44 AM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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One more. These are leaking from the bottom seal. There are two things that you need to look for. The brown liquid around the perimeter of the capacitor is where the electrolyte is highly concentrated. If you look out a bit farther, you can see that it looks like an oil has spilled on the board. It's more obvious on boards that are dusty but can be seen on clean boards if you look closely.
As a side note... Anyone with an amp (Autotek, Hifonics...) that uses these brown Nichicon capacitors marked PF(M) should check for this to see if there is any leakage. The electrolyte can damage large areas of the board.
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4th January 2010, 01:01 AM
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#8 |
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Magneto the Gravity Man
diyAudio Member
Join Date: Mar 2005
Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
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[QUOTE=Perry Babin;2034011].................These are leaking from the bottom seal. There are two things that you need to look for. The brown liquid around the perimeter of the capacitor is where the electrolyte is highly concentrated. ...........QUOTE]
Some manufacturers fix large caps down with with glue/cement. This can be brown or white. but usually goes up the can a little. Don't confuse with leakage. Andy .
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4th January 2010, 03:20 AM
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#10 |
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diyAudio Member
Join Date: May 2003
Location: Palatiw, Pasig City
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liquid soap and water.....
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What do leaky caps look like ?
