Signal Loss (again)
Posted by: Charles Paterson on 22 December 2007
It's back! After having been back to Naim it appeared to be sorted appart from the occasional loss, lately it's happening quite regular,4 or 5 times a week & twice today. I'm thinking of giving up & moving onto something more reliable even if it does come with a drop in quality. Is there anyone outthere who has an idea what can cause this.
Charlie
Charlie
Posted on: 17 January 2008 by David Dever
quote:have the:
DVD5 - CO1
LUMAGEN - CO2
PC - OPT1
I switched from OPT1 to CO2 & lost the signa, now surely that would rule out Sky or V+ causing this.
Not necessarily–if you switch from OPT1 to COAX2 and lose signal, what happens when you then switch to COAX1–does the signal return (signal locked, audio is decoded, sound produced, etc.), or does the AV2 decoder board "stall"?
In general, a video processor that provides any sort of audio delay (e.g., lipsync) should indicate that it has locked onto the bitstream signal prior to buffering–OTOH, if it is merely switching the signal, then you ought to try a direct connection.
VMC is entirely correct (who'd have guessed!) in that the n-Vi is much more tolerant of this than the AV2.
Posted on: 17 January 2008 by Charles Paterson
I only just started using the audio on the Lumagen, until last week all connections were direct. Once the signal has gone it doesn't matter what input or signal you switch to analogue or digital, the only way to get any sound is to power off then on.
Posted on: 18 January 2008 by Charles Paterson
Should I get intouch with the dealer now or are there anymore suggestions I could try ?
Cheers, Charlie
P.S. Does the DVD5 have onboard DD & DTS decoders ?
Cheers, Charlie
P.S. Does the DVD5 have onboard DD & DTS decoders ?
Posted on: 06 February 2008 by Charles Paterson
Well it lasted a whole two weeks without dropping the signal then it comes back with a vengeance, twice yesterday & so far twice today. I think unless there's no plans to update the software with a solution I will be looking elsewhere for a1 more reliable processor.
Posted on: 06 February 2008 by David Dever
With that amount of intermittent behavior, are you absolutely sure that there is not some local environmental effect that relates to the way in which the processor behaves? (Not that this excuses any faults on the processor's part, but it may affect performance in general.)
Posted on: 06 February 2008 by Charles Paterson
As it's been happening for quite a while I tried using it in several different ways but it still happens, so unless there's a solution (soon) I think I'm going to give up.
Posted on: 06 February 2008 by AV@naim
Does the issue happen with only the DVD5 connected to the AV2 (no other sources). I realise there is a timescale involved. I also find it very bizzare that mine works ok with DVD5 + other digital/analogue connections running latest code, but your one, thats been repaired on various occasions, seems to sport the same problem each time.
My diagnostic is that if you have the same issue with ONLY DVD5 connected via SPDIF, then its most likely AV2 at fault.
If you don't, then its got something to do with one of the other devices causing interference.
Another question, do you have a device for monitoring mains voltage? I wonder if your mains supply is varying greatly.
Lastly, check for ground loops in your system
My diagnostic is that if you have the same issue with ONLY DVD5 connected via SPDIF, then its most likely AV2 at fault.
If you don't, then its got something to do with one of the other devices causing interference.
Another question, do you have a device for monitoring mains voltage? I wonder if your mains supply is varying greatly.
Lastly, check for ground loops in your system
Posted on: 07 February 2008 by Charles Paterson
What your asking is rather awkward, my dealer normally does most of this for me (can't reach the wires from my wheelchair). Measuring the mains, I haven't got a clue, if it had something to do with a loop surely I wouldn't get long breaks where everything works perfect.
Apparently I'm not the only one, if you have a look here: AVforums & start from post 2666 & 2676.
Charlie
Apparently I'm not the only one, if you have a look here: AVforums & start from post 2666 & 2676.
Charlie
Posted on: 07 February 2008 by RAM
Had the same problem several years ago.
It's the Gen6 PCB in the AV2.
Also a good idea to update to latest Firmware.
It's the Gen6 PCB in the AV2.
Also a good idea to update to latest Firmware.
Posted on: 07 February 2008 by RAM
Further thoughts
Send the AV2 to Naim Audio for Repair and a Firmware Update.
Also, it's critical that you NEVER connect or disconnect any Cables when the AV2 is "On" or in "Standby" Mode.
In other words, make sure the power is turned off (Switch on back Panel) before connecting or disconnecting cables.
Once the unit is full Off, wait two (2) minutes before making any connections, from AV2 or the Source components.
Send the AV2 to Naim Audio for Repair and a Firmware Update.
Also, it's critical that you NEVER connect or disconnect any Cables when the AV2 is "On" or in "Standby" Mode.
In other words, make sure the power is turned off (Switch on back Panel) before connecting or disconnecting cables.
Once the unit is full Off, wait two (2) minutes before making any connections, from AV2 or the Source components.
Posted on: 08 February 2008 by Charles Paterson
My AV2 has been repaired twice not several & only once for this fault. I also found the fact that your AV2 works fine to be a bit patronising indicating that it's something I've done to cause the problem.quote:Originally posted by AV@naim:
Does the issue happen with only the DVD5 connected to the AV2 (no other sources). I realise there is a timescale involved. I also find it very bizzare that mine works ok with DVD5 + other digital/analogue connections running latest code, but your one, thats been repaired on various occasions, seems to sport the same problem each time.
My diagnostic is that if you have the same issue with ONLY DVD5 connected via SPDIF, then its most likely AV2 at fault.
If you don't, then its got something to do with one of the other devices causing interference.
Another question, do you have a device for monitoring mains voltage? I wonder if your mains supply is varying greatly.
Lastly, check for ground loops in your system
Posted on: 08 February 2008 by AV@naim
Point taken, but it is not my intention to patronise.
I am more frustrated, than anything else, that you are still having problems after the unit has been returned to naim.
I suggest you contact me via: info@naimaudio.com
(Quote AV@naim in the mail)
I am more frustrated, than anything else, that you are still having problems after the unit has been returned to naim.
I suggest you contact me via: info@naimaudio.com
(Quote AV@naim in the mail)
Posted on: 09 February 2008 by Chumpy
Although Naim have made/make some great products, IMO for AV rear-channels etc etc there are better cheaper products.
Posted on: 09 February 2008 by Charles Paterson
To be fair apart from this problem I can;t complain about Naim. I've had several Lexicon's, a CP3, DC2 & an MC8 & I still prefer my AV2, I love the sound + as an extra bonus it looks as good as it sounds.
Hopefully I get it sorted & have until Naim bring out something better.
Charlie
P.S. (AV@naim Thanks) I'll send an email sometime tomorrow.
Hopefully I get it sorted & have until Naim bring out something better.
Charlie
P.S. (AV@naim Thanks) I'll send an email sometime tomorrow.
Posted on: 09 February 2008 by RAM
Hi Charles,
I have been a Naim retailer for more then thirty years.
As I said in my previous post, I had exactly the same problem with my AV2.
Also, one of my customers AV2 had the same problem.
My unit had the Gen6 PCB replaced, and it has been working perfectly for more then three years.
My customers unit had a cold-solder-joint on the Gen6 PCB.
When it was returned from Naim it has also been working perfectly.
The Gen6 PCB is responsible for locking onto incoming signals, deciding what mode of processing is required, and turning on Dolby Digital, etc.
I'm fairly confident this is the root of the problem.
Once again your best bet is to send it to Naim for repair and update.
I have been a Naim retailer for more then thirty years.
As I said in my previous post, I had exactly the same problem with my AV2.
Also, one of my customers AV2 had the same problem.
My unit had the Gen6 PCB replaced, and it has been working perfectly for more then three years.
My customers unit had a cold-solder-joint on the Gen6 PCB.
When it was returned from Naim it has also been working perfectly.
The Gen6 PCB is responsible for locking onto incoming signals, deciding what mode of processing is required, and turning on Dolby Digital, etc.
I'm fairly confident this is the root of the problem.
Once again your best bet is to send it to Naim for repair and update.