One of my OPA541AP short without knowing why - diyAudio
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Old 13th September 2006, 03:58 PM   #1
5150ed is offline 5150ed  Thailand
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Default One of my OPA541AP short without knowing why

One of my OPA541AP short without knowing what is the reason.

I am using 100mf Blackgate N with 1000mf Balckgate Standard and haveing very wonderful result however, I want to try only 100mf Blackgate N which is said to have best mid and high frequency.

So I remove the 1000mf standard, without touching any others parts at all.

But when I turn on my amp there is a lound noise from one of my speaker and noise from the other side.

So I check both chanel, nothing wrong. I did try again, same thing happen.

Then I connect the 1000mf standard back but one of my chip is short resulted in 29V DC offset at the speaker terminal. .

The worst thing is I still do not know why???
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Old 13th September 2006, 05:06 PM   #2
Nordic is offline Nordic  South Africa
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My guess was it formed part of an RC network, and you basicaly changed the cutoff frequency for your amp to the point where it made the chip oscillate to death.
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Old 22nd September 2006, 02:50 PM   #3
100db is offline 100db  Thailand
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My friend, you may still lucky enough.
Check your grounding, power and signal ground may loosen or separate when you remove the BG

I've a similar symptom when I forgot to connect power gnd. to signal gnd.
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