U17
Pin 1: 0
Pin 2: 7.74
Pin 3: 0
Pin 4: -9.92
Pin 5: 0
Pin 6: 8.32
Pin 7: 9.75
Pin 8: 0
All these tensions, I measured in less than a minute, and after a few seconds, Q110 has exploited, can be found exceeded my time connecting to the power?
Pin 1: 0
Pin 2: 7.74
Pin 3: 0
Pin 4: -9.92
Pin 5: 0
Pin 6: 8.32
Pin 7: 9.75
Pin 8: 0
All these tensions, I measured in less than a minute, and after a few seconds, Q110 has exploited, can be found exceeded my time connecting to the power?
Well, confirmed, Q8, Q110 and Q111, transistors burned.
I do not know it could happen ...
I have to order more parts, mmmmmhhmm .....
I do not know it could happen ...
I have to order more parts, mmmmmhhmm .....
U17 looks defective to me. It can really strain the amp with U17 being defective. You should remove U17 and order a new one. LM6171 BIN
I agree. If the voltage on the inverting input (pin 2) is greater than the voltage on the non-inverting input (pin 3), the output (pin 6) should be negative.
There may be other problems but that IC needs to be replaced.
There may be other problems but that IC needs to be replaced.
Thank you very much to both, I had suspected something, so I ordered the part yesterday.
I take to get eight or ten days.
Thanks again, and wish them a Happy New Year.
I take to get eight or ten days.
Thanks again, and wish them a Happy New Year.
Well, today me and the new parts have arrived, finally!
Replaced: U17 and IRF3415 (IRF6215 others were already replaced)
When connected, the LED lights to protect two seconds and shuts down.
The speaker produces a sound followed (ssssssssssshhhh) and when connected to the input audio sounds very softly.
Any ideas?
Replaced: U17 and IRF3415 (IRF6215 others were already replaced)
When connected, the LED lights to protect two seconds and shuts down.
The speaker produces a sound followed (ssssssssssshhhh) and when connected to the input audio sounds very softly.
Any ideas?
Without a scope, it's very difficult to troubleshoot class D amps.
When you look for a scope, look for one with a locked trace displayed and from a seller with 100% good feedback. Shipping a scope is expensive. You don't want to have to ship it back if it doesn't work.
When you look for a scope, look for one with a locked trace displayed and from a seller with 100% good feedback. Shipping a scope is expensive. You don't want to have to ship it back if it doesn't work.
I've been watching some oscilloscopes, but for now, I will not be able to buy one (my budget leak, 300 or $ 400, expensive for me) I'm sorry ..
Try to find another solution for this amplifier.
Thank you very much for everything again, Perry.
Try to find another solution for this amplifier.
Thank you very much for everything again, Perry.
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. ..
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. ..
Now, just plug it in, Q113 has exploded ....
I do not know it could happen ....
I have to order more parts.
Start again.
I do not know it could happen ....
I have to order more parts.
Start again.
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)?
Could it be that had been defective? What would have also caused the destruction of Q113 (IRF6215)?
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?
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?
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 ...
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 ...
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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.
The value of the resistors isn't really important.
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,
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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