Got this Arcam AVR350 on the bench, which has problems with speaker relays (the blue ones incircled in red).
I can't find a service manual for this unit, and as I need to remove several other boards with tons of wires to get access, I would like to have the manual in order to get it correct assembled again.....
Anyone here able to provide the manual or guide me??
Thanks in advance 🙂
I can't find a service manual for this unit, and as I need to remove several other boards with tons of wires to get access, I would like to have the manual in order to get it correct assembled again.....
Anyone here able to provide the manual or guide me??
Thanks in advance 🙂
Attachments
Hi, you can get service info from hifiengine dot com. It's pretty unusual to have a problem there, are you sure?
Sadly my IP-area is banned from hifiengine......
No I'm not sure. But my friend insist on having them replaced........ 🙄
No I'm not sure. But my friend insist on having them replaced........ 🙄
Just use a VPN to bypass it. Your friend is misguided. The main motherboard PCB is the usual source of trouble, followed by the amplifier modules and the standby PCB.
Don't forget to correct the power supply to DSP board and follow the ON /OFF procedure on them. This series of Arcam receivers is facking unpredictable .
Kramtweeter, are you skilled enough to replace that multipin surface mounted DSP IC on the dsp board ? I recapped 4 of them and gave them away to friends since they are pretty much worthless thsese days but I'm stuck with re-capped 250 with fried DSP board. Bought the Ic's just afraid to touch it ..
Kramtweeter, are you skilled enough to replace that multipin surface mounted DSP IC on the dsp board ? I recapped 4 of them and gave them away to friends since they are pretty much worthless thsese days but I'm stuck with re-capped 250 with fried DSP board. Bought the Ic's just afraid to touch it ..
They do sound pretty nice when working actually. Google the problem . There is a guy in Israel who had a nice write up on this series of Arcam receivers and the bugs. I've got a mint AVR350 with all the factory packing and accessories for free because it was malfunctioning and the owner deemed it obsolete (true) and therefore not worth of the repair cost (also true ) I corrected DSP board PSU supply and its a base of my GF HT system . Works great
elektrotanya is my go to for elusive service manuals.
https://elektrotanya.com/showresult?what=arcam avr350&kategoria=&kat2=all
https://elektrotanya.com/showresult?what=arcam avr350&kategoria=&kat2=all
Hi, yes I do have the equipment to do it, but I just don't have any time! I already have a backlog of arcams to fix. Each takes about 1 day's worth of work, so I do one now and then in the weekends when I have a bit of time. You can try scraping all the glue off the pins and cleaning with alcohol, that might help...
I'm sorry I just have to laugh. I picked up an AVR350 recently, and I'm in a very similar spot. I detailed the roller coaster ride here:
https://techtalk.parts-express.com/forum/tech-talk-forum/1481904-amplifier-woes-arcam-asylum
Long story short, I got taken for a ride on this. Granted, I didn't pay a ton for it, but I was basically sold something "not working/for parts" and the guy claimed it was in "Very Good" condition.
I had the exactly same concern about disassembling the amp. Unfortunately the Service Manual isn't very good, and doesn't give clear instructions how it goes together. (It does at least have schematics and parts lists, though) Let me know your email and I'll send you the PDF.
The design of this amp SUCKS for ease of repairability. Eventually my curiosity got the best of me and I just took lots of photos and went at it and took all the cards out and unplugged all the ribbon cables. I replaced probably 8-10 bad caps and got it all back together. Putting it all back together wasn't nearly as hard as I'd feared, although I literally have like 100 screws I have to put back in.
With that said, after repairing the bad caps, mine still has a pretty loud transformer hum. At this point I'm not sure if it's mechanical or if there's some other component on the board that I couldn't find. I'm going to try removing the transformer tonight and see if something is just rattling there. The hum is slightly audible at the speakers, and does not get louder with volume or input changes. So as it is, I KIND OF have a working amp now.
Is it possible that an amp's humming transformer can be audible through the speakers? Like, if the humming is mechanical and I manage to quell that, will it disappear from the speaker?
Is transformer hum ALWAYS mechanical? Is there some other element in the circuit that could be causing the transformer to hum so loudly? I don't claim to know a ton about amp repair, which is a big part of the reason I took this on (read: "sunk cost fallacy"). I figured what did I have to lose? And so far, I've learned some cool stuff, so it's not a total loss.
https://techtalk.parts-express.com/forum/tech-talk-forum/1481904-amplifier-woes-arcam-asylum
Long story short, I got taken for a ride on this. Granted, I didn't pay a ton for it, but I was basically sold something "not working/for parts" and the guy claimed it was in "Very Good" condition.
I had the exactly same concern about disassembling the amp. Unfortunately the Service Manual isn't very good, and doesn't give clear instructions how it goes together. (It does at least have schematics and parts lists, though) Let me know your email and I'll send you the PDF.
The design of this amp SUCKS for ease of repairability. Eventually my curiosity got the best of me and I just took lots of photos and went at it and took all the cards out and unplugged all the ribbon cables. I replaced probably 8-10 bad caps and got it all back together. Putting it all back together wasn't nearly as hard as I'd feared, although I literally have like 100 screws I have to put back in.
With that said, after repairing the bad caps, mine still has a pretty loud transformer hum. At this point I'm not sure if it's mechanical or if there's some other component on the board that I couldn't find. I'm going to try removing the transformer tonight and see if something is just rattling there. The hum is slightly audible at the speakers, and does not get louder with volume or input changes. So as it is, I KIND OF have a working amp now.
Is it possible that an amp's humming transformer can be audible through the speakers? Like, if the humming is mechanical and I manage to quell that, will it disappear from the speaker?
Is transformer hum ALWAYS mechanical? Is there some other element in the circuit that could be causing the transformer to hum so loudly? I don't claim to know a ton about amp repair, which is a big part of the reason I took this on (read: "sunk cost fallacy"). I figured what did I have to lose? And so far, I've learned some cool stuff, so it's not a total loss.
Thanks kramtweeter
I need to have a serious talk with my friend about his observations
Thanks kramtweeter
I need to have a serious talk with my friend about his observations
Can only agree..... This amp is a laugh. Looks like it's build by parts they just had laying on stock. It's a mess inside and must be concidered as a use and discard amp.......
There is no such thing as a 2nd hand Arcam AVR receiver in good working order unless it's just had a full service. So when you buy one, you have to assume it's for parts / not working.
Normally any kind of hum is power supply related. Perhaps you didn't get all the faulty caps or there are still faults on the main PCB? I've never had one where the transformer is mechanically buzzing or humming.
Well , it is much more than an amp . Seven channel AVR receiver which was once considered by Peter Moncrieff , an eccentric audio critic of some credentials as a state of the art device encircling 2 channel separate devices many times its price . He also had similar opinion on the DAC's employed in those designs.
And it was built according to the best British tradition meaning using the cheapest parts available from "fly by night" suppliers and slave labor assembly.
LOL foolish me should have realized I was the dunce thinking he was getting a steal on a used Jaguar.
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