Buzzing noise from Marantz SR5008

[zeuiax]

So I have this receiver from past 2 years now. It started making buzzing noise a year ago. Its starts very randomly. Buzzing noise doesnt increase with volume. Its starts with static cracking sound then continuous buzz till you switch off.

I tried removing all inputs to find the culprint. However, receiver still makes buzzing noise without any inputs plugged in.

Then I thought it must be grounding our wiring issues with current house. So I tested it 3 different friends place in 2 states. Buzz still goes on....

And lastly, I took it to Marantz service center in NYC thinking it must have a blown capacitor or something. Yet, they couldn't find any issues with it. So they just upgraded the firmware and gave it back. It worked flawlessly for 3 months and last week it started making that buzz again.

I have not idea what to do now..other than dropping it from 4th floor

May be I should try that voltage filter humX???


Set up details

Marantz sr5008 >>>>AMP: Onkyo 2 channel>>>>PSB Left and right

Inputs : Fios cable, Xbox one s, Amazon Firebox, Fiio X3 digital audio player and ethernet cable
Output: Just one to Tv

 

[tyhjaarpa]

Why don't you run your speakers directly from Marantz unit? Doubt this has anything to do with the issue but worth a try I guess.

My SR7008 had static noise issue with some other issues as well, they replaced hdmi board twice and the issue came again. When I got new receiver I finally got rid of those issues. But perhaps some one else who knows more about electronics can say something more.

 

[PENG]

So I have this receiver from past 2 years now. It started making buzzing noise a year ago. Its starts very randomly. Buzzing noise doesnt increase with volume. Its starts with static cracking sound then continuous buzz till you switch off.

I tried removing all inputs to find the culprint. However, receiver still makes buzzing noise without any inputs plugged in.

Then I thought it must be grounding our wiring issues with current house. So I tested it 3 different friends place in 2 states. Buzz still goes on....

And lastly, I took it to Marantz service center in NYC thinking it must have a blown capacitor or something. Yet, they couldn't find any issues with it. So they just upgraded the firmware and gave it back. It worked flawlessly for 3 months and last week it started making that buzz again.

I have not idea what to do now..other than dropping it from 4th floor

May be I should try that voltage filter humX???


Set up details

Marantz sr5008 >>>>AMP: Onkyo 2 channel>>>>PSB Left and right

Inputs : Fios cable, Xbox one s, Amazon Firebox, Fiio X3 digital audio player and ethernet cable
Output: Just one to Tv

My Parasound Halo A21 power amp would buzz like crazy occasionally, I eventually realized it happened whenever the table humidifier is on high. I suggest you turn everything that have dimmer circuits, and variable speed drives off. It will be quicker if when it buzz, you try to use a long extension cord and plug it into the 20A outlet in the kitchen but make sure nothing else on that circuit is on.

 

[TLS Guy]

If that unit buzzes with nothing connected to any inputs, it is not an external grounding issue.

It could be RF interference. However I think it has a dry solder joint some place, probably in the ground plane. I suspect the trip to the service center shook things up and made the contact good for a period of time.

Unfortunately these sort of faults are hard to trace and take lots of patience.

 

[zeuiax]

Why don't you run your speakers directly from Marantz unit? Doubt this has anything to do with the issue but worth a try I guess.

My SR7008 had static noise issue with some other issues as well, they replaced hdmi board twice and the issue came again. When I got new receiver I finally got rid of those issues. But perhaps some one else who knows more about electronics can say something more.

Funny you mention that. I have tried it many times. What interesting is, everytime I switch speakers to receiver or to amp, buzzing noise goes away randomly for few mins to few days. Then its back to normal buzzing.

 

[zeuiax]

My Parasound Halo A21 power amp would buzz like crazy occasionally, I eventually realized it happened whenever the table humidifier is on high. I suggest you turn everything that have dimmer circuits, and variable speed drives off. It will be quicker if when it buzz, you try to use a long extension cord and plug it into the 20A outlet in the kitchen but make sure nothing else on that circuit is on.

Let me give this a try.

 

[slipperybidness]

Funny you mention that. I have tried it many times. What interesting is, everytime I switch speakers to receiver or to amp, buzzing noise goes away randomly for few mins to few days. Then its back to normal buzzing.

The way that you say this is hit or miss for buzzing, it seems pretty clear to me that either TLS or PENG have given you the correct answer.

Hopefully, PENG is right on this. That will be the easier problem to track down and correct.

 

[dannispel]

Hey guys, wondering if there was ever a resolution to this. zeuiax, did you ever get that buzzing to stop?

I also have an SR5008 with the same problem. It's really frustrating since I bought the thing used less than a year ago, and it's been acting up for the last couple months. Thoughts?

 

[AcuDefTechGuy]

My Denon AVR-3012CI also has buzzing sound when I use the Pre-outs, but not when I use the AVR by itself.

I think they're just defective.

 

[Drunkpenguin]

Troubleshooting sounds like too much work. Id just upgrade and move on.

 

[AcuDefTechGuy]

I bought the thing used...

Buy a brand new one next time.

Or try something else like Yamaha or Sony ES.

 

[dannispel]

Buy a brand new one next time."

A fine solution, but it doesn't help much with what I've got. What I'm trying to figure out is if it's an issue with the receiver itself or the power source, inputs, etc. The original thread left off before any resolution. It seems like it's time to upgrade if the receiver is defective and Marantz can't fix it.

 

[AcuDefTechGuy]

What I'm trying to figure out is if it's an issue with the receiver itself or the power source, inputs, etc. The original thread left off before any resolution.

I couldn't attribute the buzzing noise on my Denon to anything because I was using the same sources and power amps to compare.

So I concluded that my Denon has some kind of defect in the Pre-outs.

Are you using the pre-outs to connect to external amps or just the AVR itself?

 

[dannispel]

I have two powered woofers that get signal from the dedicated woofer pre-outs. Front, center, and rear speakers are just connected to the AVR. I haven't tried disconnecting my woofers to see if they are causing some sort of problem. Worth a shot.
The only input at the moment is optical from the TV. The buzzing problem started when my cable box, Xbox, etc. were all run through the AVR, so I've concluded that the inputs aren't causing the problem.

 

[dannispel]

Okay... pre-outs disconnected, and no buzzing for the last 15 minutes. It used to start after about two minutes. Too early to proclaim victory, but I'll check back in after a while.

 

[PENG]

I couldn't attribute the buzzing noise on my Denon to anything because I was using the same sources and power amps to compare.

So I concluded that my Denon has some kind of defect in the Pre-outs.

Are you using the pre-outs to connect to external amps or just the AVR itself?

I suspect certain buzz depends on how the power supply components are tuned (unintentionally) to and resonate with certain harmonics injected by certain dimmers and variable speed drives of certain appliances. The table humidifier I mentioned only excited the Halo A21 but not the other amps plugged to the exact same outlet. My A21 is definitely not defective or I would have sent it back. The other amps might buzz with a different kind of interference if I tried hard enough to find that combination. Noise issues are complicated and can be hit and miss. A few years ago, there were quite a few complaints about the Marantz AV7005 hum, yet mine never did no matter where I plugged/used it. Hard to believe, but it does depend... Even Bryston now no longer object to those "clean power/noise/surge auppression gadgets, as long as they are well designed/made, the could be good to have. I have none of those only because I don't need one, yet.

 

[PENG]

Okay... pre-outs disconnected, and no buzzing for the last 15 minutes. It used to start after about two minutes. Too early to proclaim victory, but I'll check back in after a while.

Is it a constant level buzz, or it varies with the volume? Are everything connected direct to wall oulets, or to some sort of power bars?

 

[AcuDefTechGuy]

Okay... pre-outs disconnected, and no buzzing for the last 15 minutes. It used to start after about two minutes. Too early to proclaim victory, but I'll check back in after a while.

So Pre-outs are disconnected - you are not using the external amps now?

And you are just using the Marantz AVR by itself?

Yeah, I bet you won't hear any more buzzes. That's what happened with my Denon. As long as I just use the AVR all by itself and not use any external amps, there was no buzzing noise.

 

[PENG]

So Pre-outs are disconnected - you are not using the external amps now?

And you are just using the Marantz AVR by itself?

Yeah, I bet you won't hear any more buzzes. That's what happened with my Denon. As long as I just use the AVR all by itself and not use any external amps, there was no buzzing noise.

If I remember right, that was the same scenario with the AV7005, except those guys had no choice but to stopping using the prepro.

 

[AcuDefTechGuy]

If I remember right, that was the same scenario with the AV7005, except those guys had no choice but to stopping using the prepro.

I guess we might say this is one example where an AVR is better than a Pre-pro.

If the Pre-pro causes intractable noises (buzzing or humming), you have to replace it. If an AVR causes noises, you can just use the internal amps.