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"Bad caps" revisited

by Willy / November 9, 2011 4:04 AM PST

It seems bad caps are becoming a problem that is no longer one of a bad manufacturing issue. At one time several yrs. back, the formula for capacitors was stolen in an case of industrial espionage.

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About that heat damage
by Steven Haninger / November 10, 2011 12:46 AM PST
In reply to: "Bad caps" revisited

If you've opened a few power supplies, you may have seen some with darkened areas on the mounting boards. This is when the resins turn to carbon. Carbon is a conductor of electrical current. Thus, it can act as another component in the circuit and change how things regulate. Eventually the change to carbon cascades and causes total failure but any visible heat damage of this type to the boards is a warning of things to come.

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Yes, very true
by Willy / November 10, 2011 7:05 AM PST
In reply to: About that heat damage

One reason I posted as I found newer mtrbds. and/or other components showing cap damage. Though, in some it wasn't apparent, a real close look resulted in a tipped or distended leaning. Yes, I have taken apart PSUs and checked them for similar damage. Some are so bad, BUT they still worked at least intermittently. Of course, others are "smoke generators". -----Willy Happy

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Thanks
by raleighm57 / March 28, 2012 8:44 AM PDT
In reply to: "Bad caps" revisited

Thanks for the reply. I have suspected the power supply and have ordered a replacement with higher wattage. Hopefully that will fix the problem. I will also get out a light and magnifyer and look for bad caps.

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