I have a Denon AVR-5800 that stopped working several years ago. I took it to a Denon authorized service center who said a digital board went bad and that since the board was no longer made by Denon they could not repair it. For a while I had in my mind the thought of using the preamp inputs and bypassing other components inside to make it into an amplifier. I even posted here about it and got some useful advice: https://www.diyaudio.com/community/threads/using-amp-in-receiver.342695/
Unfortunately I never got around to it so it has been sitting in its box for several years.
As far as I know all the amplifier components are fine. The thing is a beast. It weighs about 50 pounds, was rated as 170 watts/channel, and has a massive toroidal transformer. It seems like a terrible waste to send it to the recycle bin and I am hoping someone here could use it. I can see someone using the transformer in an amp they are building or using both the transformer and amplifier boards to make an amp. Somebody with the right skills might even be able to repair the digital board that failed.
So, I'd like to sell it to someone for any reasonable offer. I am located in the Houston area and it is probably too heavy to ship economically so it needs to be someone local. Does anyone want it or have any ideas of what I can do other than recycle it?
Unfortunately I never got around to it so it has been sitting in its box for several years.
As far as I know all the amplifier components are fine. The thing is a beast. It weighs about 50 pounds, was rated as 170 watts/channel, and has a massive toroidal transformer. It seems like a terrible waste to send it to the recycle bin and I am hoping someone here could use it. I can see someone using the transformer in an amp they are building or using both the transformer and amplifier boards to make an amp. Somebody with the right skills might even be able to repair the digital board that failed.
So, I'd like to sell it to someone for any reasonable offer. I am located in the Houston area and it is probably too heavy to ship economically so it needs to be someone local. Does anyone want it or have any ideas of what I can do other than recycle it?
Hi JC,
I like your idea of bypassing the digital PCB. Denon makes good sounding amplifiers. It seems to me that your idea is easily doable.
I know the DSP chips need special soldering equipment to remove (Bump chips). Back when I did warranty for them, DSP boards were replaced, we didn't attempt to service them if the chip was suspect. You may also find one being parted out or in a thrift shop. Cosmetics don't matter, you could replace the PCB if you knew the other was okay (like blown amplifiers).
I like your idea of bypassing the digital PCB. Denon makes good sounding amplifiers. It seems to me that your idea is easily doable.
I know the DSP chips need special soldering equipment to remove (Bump chips). Back when I did warranty for them, DSP boards were replaced, we didn't attempt to service them if the chip was suspect. You may also find one being parted out or in a thrift shop. Cosmetics don't matter, you could replace the PCB if you knew the other was okay (like blown amplifiers).
You are right, the amp sounded great. I replaced it with a Marantz (which failed shortly before the warranty expired and also couldn't be repaired so Marantz just gave me a newer model) and the Marantz is nowhere near as good as the Denon was. At this point I have lost my ambition to tear into it and try to do this myself but it would be a great project for someone who likes this kind of stuff. That's why I am hoping to find someone to take it off my hands and put it to good use.
lol!
I have a Marantz AVR (still working), and a Denon AVR. The Denon is easier to operate and sounds better. Big beast. The Marantz sounds better than most units out there, so I'll give it credit for that. The remote was ridiculous, it frustrated me to operate it.
Too bad you can't find a donor unit for that PCB and just swap it.
I have a Marantz AVR (still working), and a Denon AVR. The Denon is easier to operate and sounds better. Big beast. The Marantz sounds better than most units out there, so I'll give it credit for that. The remote was ridiculous, it frustrated me to operate it.
Too bad you can't find a donor unit for that PCB and just swap it.