Behringer NX6000D Power Amplifier Repair (With Audio Tutorial)

[@VRTiMo]

Another two units saved (NX4-6000) thanks to this video! D32 on one unit, D29 on the other.

[@AudioAmplifierServicing]

That's great to hear, please feel free to make a donation to support the channel.

[@CoryTealeSK]

This video was a god send! I had 2 units that had failed and thought I had to throw them away. Turns out both had D32 shorted in the power section and after replacing those shottky diodes with a different manufacturer (Part Number VS-MBRS1100-M3/5BTGICT-ND Specs: 100V 1A DO214AA) they are both back in business. Funny thing is one is an old NU6000 and the other a much newer NX4-6000 but they both have the exact same power PCB revision. The nx4-6000 had failed about a week ago and that unit had replaced my failed NU6000 from a couple years ago. I thought I was out 2 units but both are working again! Thanks again for sharing your expertise in fixing Behringer amp, such a pity that something like a shoddy shottky diode can render devices inoperable so easily. Keep up the great worK!

[@AudioAmplifierServicing]

@CoryTealeSK Great to hear you have repaired your Amplifiers, and i appreciate the positive feedback about my channel.

[@delatronics3257]

Thank you for your knowledge! I couldn't get a schematic but went straight to D39 to find it shorted. Now the amp is working thanks to you.

[@AudioAmplifierServicing]

That's great to hear and I appreciate the comment. Thank you.

[@MrPlytiger]

Love the voice description of these videos. I've heard also that shotkey diodes are used in SMPS because they can switch much faster than normal silicone diode, smps can switch at over 25kHz.

[@AudioAmplifierServicing]

Thank you, your correct the diodes are used in smps due to their ability to switch on and off at high frequency.

[@jonathan_ansell]

almost.. FREDs are often used for high speed switching & spike snubbing in SMPS. Shotkey diodes have the advantage that Vf is much lower, so the dissipate much less power.

[@ryanybos]

Thank you for the valuable time saving information and insight

[@AudioAmplifierServicing]

Thank you, your welcome.

[@kinklesstetrode]

Spent ages on this amp. Had one of the mosfets in the power amp leaky. Replaced, still goes into prection mode. Once channel I see PWM waveform, other channel no. I guess the controller chips have been damaged? Other cold checks seem okay.

[@AudioAmplifierServicing]

Yes, it does look like the controller chip is damaged

[@peterstein5670]

Thanks for the Video! Lately, I hooked up a 4 Ohm Subwoofer on the Amp, and let it run for a few minutes. Then I realitez, that the amp was shutting down for a short period and immediatly restarting. But when I went to check it, it was already in Protection mode and no sound was getting through. I had the same faults as you were describing, so I replaced also both diodes D29, D30 with the SB1100. It went out of Protection Mode, and i thought, it was good. But sadly I was getting 80 V DC on both Outputs and also a few Volts DC on the Input... Now I guess I have to try and find also a whole new board for the Amp if I am lucky.

[@AudioAmplifierServicing]

Hi for a new circuit board contact [e-mail], supply chain is very long.

[@peterstein5670]

Thanks for the fast answer, I'm going to try it🙏

[@subculture-records]

Don't waste your money. Spend a little extra and get a decent amp, old school are better, such as a Crown MA5000VZ / MA5002VZ or Crest Audio Pro 10001, CA18, etc. Old school amps are heavy but they last forever. To get reliability from lightweight amps you have to look at companies such as Lab Gruppen & Powersoft, etc. The price is high. Behringer amps are not reliable, they're just cheap. The price of their PCBs is high because they want you to buy another amp, not repair your broken one. Hence, no available schematic diagrams for their products. A little extra money spent on a decent amp now, will serve you well in the future.

[@peterstein5670]

@@subculture-records Yeah, in the future I am going to buy another Amp, for now, I contacted musictribe and bought a pcb for 330$. The delevery time was also very short, about a week, so they had it in stock, luckily. Now it works just fine again and I hope, the stronger Diodes will last longer.

[@AudioAmplifierServicing]

@@subculture-records Absolutely spot on.

[@VRTiMo]

Thanks!

[@robdj3341]

Hi, great video. I've just purchased an NU3000D, was initially working but now no sound. When I connect the inuke remote it shows inputs and outputs active and fluctuating. I've tested the speakers and mixer with different cables and amplifier. Any suggestions would be gratefully appreciated. Cheers Rob

[@AudioAmplifierServicing]

I would recheck connections and switch settings www.bhphotovideo.com/lit_files/84919.pdf

[@roderickbonello]

Good afternoon, i have the same amplifier with an issue on the two lm317 regulators, the amp switches on and works but the two 5w 12 ohms resistors heat up after a few seconds and smoke. This even happens with the fans and amplifier board disconnected... The lm 317 are good and they only seem to be supplying the fans. The strange thing is that with everything disconnected they still smoke and heat up. Thanks in advance.

[@AudioAmplifierServicing]

Hi email audioamplifierservicing@aol and I will send you the NX3000 service manual to assist with your fault finding.

[@roderickbonello]

@@AudioAmplifierServicing Thank you very much for your help as i could not find any schematics online.

[@lezliegarcia9055]

Hi, are u able to help me as i have nx6000D having protect issue. The red light blinks on and off even when playing at low volume… audio out is not affected but its annoying the protect light flickers while hearing the relay sounds together.. what could be the issue here??

[@AudioAmplifierServicing]

Hi I have not seen this issue but would advise to check with customer support at [e-mail]. If your Amplifier is within the 3 years warranty period, it will be covered under warranty.

[@christothegreat1]

Briefly, which parts had failed? What was the presumed causes and manners of failures?

[@AudioAmplifierServicing]

Hi D30 and D29 Schottky rectifier diodes on the switch mode power supply board checked. D30 found to be short circuit. (IR10 0422L) Both Didoes replaced SB1100 (100V - 1A)

[@amorbandolero2010]

muy buen video amigo, saludos desde oaxaca mexico. gracias por compartir tus conocimientos . tengo un amplificador como este pero aca en mexico es muy dificil conseguir las piezas a menos aca en donde radico, seria tan amable de decirme el valor del diodo de reemplazo que le puso en el D29 ?

[@AudioAmplifierServicing]

Hi you can replace with any 1 amp 100 volt rectifier Schottky Diode.

[@amorbandolero2010]

@@AudioAmplifierServicing muchas gracias por el dato, bendiciones amigo....

[@delatronics3257]

I notice that you can change a link in the SMPSU to convert the mains voltage from 230 to 115v; is this as simple to do as moving the link and doubling any inlet fuse? I am learning a bit more about amps now (class D, class H and revisiting Valves). I am about to be authorised by Behringer again but don't have schematics yet. I no longer live and work in the UK but now Brazil. We have 127 and 220v here, and I am getting a lot of damaged power supplies, amps, keyboards, mixers etc. I put out some videos on my channel as well but I specialise in electronic musical instruments, pro PA systems etc. Only make I will no longer work on is Crown (they make some nasty DC coupled amps that when one SMD transistor blows, you need to be careful to replace all of them on the channel).

[@AudioAmplifierServicing]

Hi Behringer will no doubt provide the service information once your registered

[@kubendranganess-ds6ch]

Thank you for this video I'm repairing a amplifier similar to this one .these amps when they are in protection does the fans power up ,my amplifier the sg3525 in protection mode there is not input voltage and output voltage on the 15 + and 15 - and 24v regulators (fans off and 24 v led for the front panel all off just wondering if this is related to the amps in shutdown mode ?

[@AudioAmplifierServicing]

Hi if the Amplifier is in protection mode the fan can spin for a few seconds on start up before the protection mode initiates. If the power supply board is disconnected from the Amplifier board and the power supply is not in protection mode then the fan will spin at high speed. I reviewed the SG3525 data sheet. www.st.com/en/power-management/sg3525.html

[@SamerRemonAlHaddad]

@@AudioAmplifierServicing Hi, so if after disconnecting the supply board from the amplifier board and the power supply is not in protection mode but with high fans as you mentioned here does this mean that the fault is not in the power section board but the amplifier board?

[@AudioAmplifierServicing]

@@SamerRemonAlHaddad Yes correct.

[@nhanled6689]

Thanks a lot for your video

[@AudioAmplifierServicing]

Your welcome

[@donataspasilis8103]

Thanks a lot for your video ! ❤

[@AudioAmplifierServicing]

Your welcome

[@jasonrsx7499]

hello friend, how are you! I need the schematic of the NX6000D.. would you have it?

[@AudioAmplifierServicing]

Hi I only have the NX3000D service manual

[@jasonrsx7499]

goodnight ! I need the service manual , the fonts of the Beringuer NU models are different .. could you provide them ? you sell

[@AudioAmplifierServicing]

@Jason R S. Music tribe the owners of Behringer do not provide any service manuals to the public and authorised service centres are under non disclosure agreement. You can email [e-mail] for the NX3000D service manual.

[@jasonrsx7499]

Thank you for your help, I already sent the email to technical support.

[@AudioAmplifierServicing]

@@jasonrsx7499 I have responded

[@subculture-records]

It needs a 3 year warranty. These amps are the pro audio equivalent of an Amstrad amplifier.

[@AudioAmplifierServicing]

@subculture-records It does come with a 3 year non transferable warranty, but it seems the Amplifiers fail just outside the warranty period. .

[@Erlandsson1964]

You talk a lot about components and ic's, but you don't show where they are. Just static pictures.

[@AudioAmplifierServicing]

As advised in the Tutorial only the NX3000D service manaul is available in the public domain, so unable to detail the component reference number to the actual device on the circuit board.

[@Erlandsson1964]

Well you talk about measuring the diodes in the rectifier for example, but don't show which ones it is. I have a nx6000d that died (not much used in 3 years). I opened it up and measured all voltages as accurate. The fans and display started up when i disconnected the ps from the amp board. I then connected the ps again, and it ran again for almost 2 weeks. Yesterday it died again.

[@Erlandsson1964]

So it is a very strange fault. I am taning it apart again this weekend.

[@AudioAmplifierServicing]

@@Erlandsson1964 The rectifier diodes that failed are listed in the description as below and also shown in the video. D30 and D29 Schottky rectifier diodes on the switch mode power supply board checked. D30 found to be short circuit. (IR10 0422L) I would not advise attempting to repair your Amplifier if you are unfamiliar with repairing electronic equipment.

[@Erlandsson1964]

@@AudioAmplifierServicing thanks i missed that completely. My problem was temperature dependant. when room was 18c it did not start, when temp rised to 20c, it started. It was a capacitor around the Viper chip (the softstart chip). It is fixed now.