Hello! I broke my amplifier by accidentally dropping a piece of copper wire onto an IGBT (T5) which led to the explosion of T1 and T5 on the schematic -> https://schems.com/bmampscom/behringer/Behringer_iNuke_NU3000_sch.pdf
I opened a thread earlier talking about a replacement for these IGBT's and now I am writing this here. Furthermore, my knowledge of repairing is basically zero. Experience is non existent...
A forum member told me "with a quick look I can see some blown smd components like R10,D5,T2,R21 and who knows what else"
That means other components are also possibly destroyed. Here is an image (with new IGBT's and horrible soldering skills)
I have no idea how to proceed in troubleshooting this stuff. A Digital Multimeter is in my repertoire but nothing more.
The amplifier turns on but the fan does not spin and the front LED's are shining RED, which they normally shouldnt because they are intended to glow orange.
Thank you.
I opened a thread earlier talking about a replacement for these IGBT's and now I am writing this here. Furthermore, my knowledge of repairing is basically zero. Experience is non existent...
A forum member told me "with a quick look I can see some blown smd components like R10,D5,T2,R21 and who knows what else"
That means other components are also possibly destroyed. Here is an image (with new IGBT's and horrible soldering skills)
I have no idea how to proceed in troubleshooting this stuff. A Digital Multimeter is in my repertoire but nothing more.
The amplifier turns on but the fan does not spin and the front LED's are shining RED, which they normally shouldnt because they are intended to glow orange.
Thank you.
Attachments
If that is your level of skill, you most likely causing more damage than repair.
But if you are ok making it worse, rather then having a professional repair it in less than an hour that’s your decision.
First - you likely have blown outputs which is why those IGBTs blew, so you have more problems.
The red led is telling you that you have a short or DC on your outputs (hence more stuff blown).
Google Dim Bulb Tester and build that before powering this on again.
With the DBT in line with the amp, you need to check all voltages, AC in, DC out of supply caps and all small voltages, likely 12-24Vdc to run less and protection and maybe pre-amp section.
If all that checks then you should test the outputs with your DMM and work backwards until you find good transistors.
After you find faulty transistors you need to check diodes and resistors around each for shorts.
Once that is done, power up with DBT and check for DC on outputs if that seems good, then put a signal in and test on a speaker you don’t mind blowing up. Hopefully if done right, it will be working as it should
Pictures of all areas of the amplifier will help you get better assistance too.
But if you are ok making it worse, rather then having a professional repair it in less than an hour that’s your decision.
First - you likely have blown outputs which is why those IGBTs blew, so you have more problems.
The red led is telling you that you have a short or DC on your outputs (hence more stuff blown).
Google Dim Bulb Tester and build that before powering this on again.
With the DBT in line with the amp, you need to check all voltages, AC in, DC out of supply caps and all small voltages, likely 12-24Vdc to run less and protection and maybe pre-amp section.
If all that checks then you should test the outputs with your DMM and work backwards until you find good transistors.
After you find faulty transistors you need to check diodes and resistors around each for shorts.
Once that is done, power up with DBT and check for DC on outputs if that seems good, then put a signal in and test on a speaker you don’t mind blowing up. Hopefully if done right, it will be working as it should
Pictures of all areas of the amplifier will help you get better assistance too.
Alright, before I do anything wild, I'll attach more images!
https://lbda.net/4fdJ.jpg
https://lbda.net/4Pso.jpg
https://lbda.net/vU2W.jpg
https://lbda.net/4fdJ.jpg
https://lbda.net/4Pso.jpg
https://lbda.net/vU2W.jpg
To me it looks like this is the power supply side of the amplifier. This is a job for an expert, there will be VERY high voltages here which can kill you, or start a fire. The amplifier is a Class D design so fixing this without expert knowlege and an oscilloscope is not going to happen.
Hmm, alright! I will sell it off to someone who knows what he's doing. Ebay is full of broken electronics which people buy and repair!
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