DIY Repair of Marantz SR8015, no audio on any channels

[bo_knows]

** UPDATE ** One month on . . . see below for faulty component tear down. High voltage carnage!

Prompted by a Denon AVR repair I read on another forum, I decided to cut open the ECO relay I replaced. Oh boy, the carnage is real.
Hopefully the Carbon deposits are obvious in the photo (it shouldn't look like that) but they are only a bi-product of the very obvious arcing and destruction of the high voltage contact pair. In comparison, the low voltage side (ECO mode on) look pristine.
I will be sourcing a more robust replacement relay with better contact materials and treatment.
Looks like I get to pull this all apart one more time

View attachment 432840

Excellent work! Please keep us posted.

I'm wondering if the top of the line A1H AVR/AVC contains these sub parts or they were upgraded.

I don't think we have any presence of Denon/Marantz engineers on this forum to chime in.

How could we reach out to provide them with the feedback? I assume they get notified via service centers around the world with this type of issue.

 

[Doodski]

How could we reach out to provide them with the feedback? I assume they get notified via service centers around the world with this type of issue.

When a warranty claim is full filled and the paperwork is sent to the manufacturer the old failed part is tossed in the garbage or sometimes returned but often times it is spot checks in failed parts returns to ensure the depot is not scamming warranty parts.

 

[bo_knows]

I will also assume that parts are carefully chosen to meet the warranty period.

Most of those AVRs have up to 3 years warranty and only A1H has 5 (that I'm aware of).

The engineering sheet for the part will most likely list the life span of the part.

 

[Doodski]

I will also assume that parts are carefully chosen to meet the warranty period.

Most of those AVRs have up to 3 years warranty and only A1H has 5 (that I'm aware of).

The engineering sheet for the part will most likely list the life span of the part.

The service depot might open the relay out of curiosity but mostly they just slap in the new part and test for proper operation and call it a day. They don't concern themselves with data sheets and MTBF specs.

 

[bo_knows]

The service depot might open the relay out of curiosity but mostly they just slap in the new part and test for proper operation and call it a day. They don't concern themselves with data sheets and MTBF specs.

I was thinking more like an engineer who designed the power supply board vs a service center tech.

 

[Doodski]

I was thinking more like an engineer who designed the power supply board vs a service center tech.

That is the thing though. Engineering reports require paperwork and time from the service depot and then follow up and action reports etc. It's a pain in the butt. Easier to just mind one's own business and stay out of politics. Replace the part, toss it and go to the next repair and stay out of the business matters.

 

[Maxpower]

So sorry; looks like Marantz really underestimated the employment/use of this relay. But from your previous postings, it seems like you kind of anticipated this also. Maybe Marantz engineers should have anticipated this deficieny also - maybe they did? - if so, shame on them for not insisting on a more robust relay module. I don't know - please correct if I'm wrong with this idea.

Yeah, thank you . . . and no worries. At least I can pick my timing for the rework over the next month or so.
You raise a good point about the relay choice. What is confusing me a little is, the PCB has an accommodation for a more significant relay, but the Marantz part number is for this 'smaller' relay. Given that unit came out of the factory during COVID . . . I wonder if there was a supply chain issue and they could not obtain the original spec?
We'll never know I guess.

 

[Maxpower]

Excellent work! Please keep us posted.

I'm wondering if the top of the line A1H AVR/AVC contains these sub parts or they were upgraded.

I don't think we have any presence of Denon/Marantz engineers on this forum to chime in.

How could we reach out to provide them with the feedback? I assume they get notified via service centers around the world with this type of issue.

Yeah, I am really hoping that is case. Especially when you're paying for the premium models. When I get a chance, I'll go back and look at the version 1 of the SR8015, before they made the hardware changes for the HDMI 2.1 bug. Maybe the original Relay was larger? COVID supply chains issues may be at the heart of this.

 

[oupee]

If you don't use ECO mode (me), you can throw the relay away completely. I'm attaching the service manual.

MARANTZ SR 8015 SERVICE MANUAL Pdf Download

View and Download Marantz SR 8015 service manual online. AV Surround Receiver. SR 8015 receiver pdf manual download. Also for: Sr8015/u1b, Sr8015/n1b, Sr8015/n1sg, Sr8015/k1b, Sr8015/fb.

www.manualslib.com