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Old 19th January 2012, 01:17 PM   #31
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Does it draw excessive current when it shuts down?
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Old 19th January 2012, 01:30 PM   #32
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Sorry, Perry, but now, I'm not at my house, I'm at work, and even within two hours, do not go out.
Anyway, I think, last night when I tried it, yes, to disconnect, fell about 15 or 20v ... on the positive and negative high voltage.
Consumption at rest was two or three amps.
In the speaker output, had 0.9 v. ..
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Old 19th January 2012, 03:56 PM   #33
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Now, just plug it in, Q113 has exploded ....
I do not know it could happen ....
I have to order more parts.
Start again.
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Old 19th January 2012, 04:33 PM   #34
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Well, after making several checks, Q8 is also short (IRF3415)
Could it be that had been defective? What would have also caused the destruction of Q113 (IRF6215)?
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Old 19th January 2012, 05:07 PM   #35
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Quote:
Originally Posted by josesony68 View Post
Well, after making several checks, Q8 is also short (IRF3415)
Could it be that had been defective? What would have also caused the destruction of Q25 (IRF6215)?

Sorry, but the first transistor, which exploded, not Q113 (I've confused) is Q25
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Old 19th January 2012, 06:48 PM   #36
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Well, I'm here with new information,
Q8 and Q25 replaced (I still have some in my closet)
This is what happens:
Protection Led two seconds and shuts down.
Positive and negative the meter, the audio output, 1.02 V
When you release the positive terminal of the battery, the meter mark: 19.70 ... 15.20 .... 11.80 ... 7.50 .... and to zero.
I dare not connect a speaker, because I have fear, it explodes again, a transistor.
weird, huh?
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Old 20th January 2012, 01:14 AM   #37
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Do you have any loose resistors? Virtually anything will work.
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Old 20th January 2012, 07:28 AM   #38
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I have to check.
All resistors MOSFET gate of the audio section, I have replaced with new ones.
The originals were 25 ohm 1% tolerance.
And I've replaced are 24 ohm 1% tolerance.
Could this be the cause of failure?

When you say "virtually anything will work," what do you mean? I do not understand ...

Last edited by josesony68; 20th January 2012 at 07:33 AM.
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Old 20th January 2012, 08:05 AM   #39
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Sorry. Do you have any new/replacement resistors that you could use to connect across the FETs to keep them turned off?

The value of the resistors isn't really important.
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Old 20th January 2012, 10:26 AM   #40
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Sorry, I did not understand,,
You mean when you ask me, if I have new resistance to replace and connect, where??
Why turn off the FET? I understand that either,
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