No, i believe ive tested it correctly using links in your sig and other info on the web. It does give funky readings while on the board compared to the other 28n15 output though.
But on that note ive replaced them with new components regardless. The resistors also seem to test fine. Maybe i have a bad DMM? 🙁
I would start fresh, replace all the outputs, source resistors, gate resistors, and the drivers.
What are the readings you get with 1 probe on the gate leg, and 1 probe on the source leg?
That would be between legs 1 and 3 on the outputs, assuming they are using FQA28N15 and FQA36P15.
What are the readings you get with 1 probe on the gate leg, and 1 probe on the source leg?
That would be between legs 1 and 3 on the outputs, assuming they are using FQA28N15 and FQA36P15.
Ive replaced the outputs. The 28n15 in question is measuring open on 1-3. Not sure which the gate drivers are, the resistors tested good. I dont want to spend much more cash on this. I may have to call it quits in that case 🙁 Hate quitting something but its not mine... Is there an easy way to find/test the drivers? maybe im confusing the terms also ill look things up a bit. And you are correct those are the outputs used in this application.
Thank you
Thank you
Yes, in the sense that they read differently out of the board. But the one on the board match. Im going back retesting them just to be sure and i am getting interesting results with Q2010 (old component). The new one reads with pos probe on Drain(2) and neg probe on Source(3) i get a 'normal' reading, and flipping the probes show open circuit.
on the old component i can get the 'flipped' probe config to read values and buzz indicating close circuit. but happens intermittenly and will sometimes read 'normal'; So i assume this one was the bad one.
on the old component i can get the 'flipped' probe config to read values and buzz indicating close circuit. but happens intermittenly and will sometimes read 'normal'; So i assume this one was the bad one.
What is the resistance between the first legs of the two 28N15s?
What is the resistance between the first legs of the two 36P15s?
What is the resistance between the first legs of the two 36P15s?
That's not exactly what I was looking for but it shows that you either have a solder bridge between legs 1 and 2 of Q2011 or it's defective.
I pulled off Q2011 its indeed shorted. Replaced it and all seems to be working now! Thank you! I do have further questions though: I understand why the power FETs blew but what would cause the outputs short? Both of the amps seem to have had the same exact issue, I have yet to test it all, but will apply same techniques to trouble shoot it. But I would really like to understand what caused them to blow considering they seem to have same issues.
Thanks once again!
Thanks once again!
A blown sub.
Speaker wires being shorted together.
Pushing the amp to its limits, at all times.
Improper heat transfer compound and or torque on the output clamps.
Powering the amp up and testing for audio without being clamped in the sink.
These are 5 things that could have shorted the outputs.
Speaker wires being shorted together.
Pushing the amp to its limits, at all times.
Improper heat transfer compound and or torque on the output clamps.
Powering the amp up and testing for audio without being clamped in the sink.
These are 5 things that could have shorted the outputs.
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