help ! dead channel

Interconnect ok? 

don't know which one to start with! - theres loads of them behind the boxes - connecting dc5xs flatcap naps 202 200! 

very odd - as been rock solid for years and halfway through a cd it stopped on the left channel.....

And what about with other sources?

C.

same if i play from mac mini 

one side down....

I take it that the FC is powering the CD5XS.

Are all the lights on as normal on the 202 ?

Sounds like you have eliminated the source as the issue as the CD and Computer both lose one channel and both speakers are working ok as you've swapped the speaker leads and the issue remains. 

It does sound a bit like something has failed but before that - 

Switch the 200 and NASPC off. Leave it to for a couple of minutes then remove the Snaic between the 202/200 and then plug back in again. Also do the same with the blanking plug on the 202 (you should only have one in). Power on the NAPSC first and then the 200.  Does the channel return ?

If not see if you can borrow a different Snaic. If this doesn't sort it then it's a trip to the dealer. No internal fusing in the 200 (only one mains fuse on the mains inlet). 

James

PS - it should not make a difference to the problem but also try removing the NAPSC and putting in the blanking plug so you have just the 202/200 in baseline configuration.

Thanks.  Will try when I'm back home but I don't understand why it should happen whilst it's playing all of a sudden . Checking leads is no doubt something I will have to look at but of course I don't have spares and its hundreds of pounds of leads

i will ring Naim but I'm guessing the quickest test would be to take the nap 200 and see if it works at a dealers if it does then I know it's the 202 or a lead which I think is more complex 

the practicalities of all this are very difficult indeed as so many leads and 4 boxes  cables together. All help appreciated 

It sounds like something may have failed but it was just a few things to try before you head off to the dealer / ring Naim. There are also a number of relays in the 202 and sometimes just powering off and leaving for a while may sort things out. Good luck. 

I'll power off and see what happens in the morning...or not. 

is the snaic the lead that takes the audio signal from the pre amp to the power amp? - is it the same one as used into a nap100?

thanks

Balance turned left?

sjw posted:

I'll power off and see what happens in the morning...or not. 

is the snaic the lead that takes the audio signal from the pre amp to the power amp? - is it the same one as used into a nap100?

thanks

It's a 4-pin DIN

Adam Zielinski posted:

sjw posted:

I'll power off and see what happens in the morning...or not. 

is the snaic the lead that takes the audio signal from the pre amp to the power amp? - is it the same one as used into a nap100?

thanks

It's a 4-pin DIN

yes - it's the same cable

I can swap one of those in and try - i think it goes from the flatcap to the 200?

As Adsm says,,have you moved the balance with the remote by mistake?

Preamp > power supply > amp.

This is a link to a useful NAIM connection guide (opens as a PDF)

https://www.naimaudio.com/site...ation%20Rev%201J.pdf

Adam

I wish it was that simple - I was nowhere near the remote when the left channel cut out -I have double checked that tho

I was playing a cd and it just stopped on that channel - i was sat 3 metres away on the sofa. 

i suppose the easiest test is to take the amp elsewhere and see if it does the same thing - otherwise it gets much more complex the 202 or a cable. 

I dont really understand what all the cables are for - didn't need to  as I've just enjoy listening to it

There a naps and a flatcap and wires everywhere so U don't know where the audio signal flows from the pre to the 200

I can't see how a cable that's stationary can just stop working and I'm guessing that its something more in the amp.

god only knows!

With NAP202 the connections possibilities are relatively modest. Just use the connection guide I've sent you - it's easy to trace a signal flow.

Generally cables don't break by themselves. But a fault diagnosis always starts with the simplest components: plugs, cables as those are themost likely to break. You must eliminate a fault in those, before an amp is blamed.

thanks!

it'll have to be a weekend thing now...

Ah so you have a flat cap in line with the 202/200 (I'd assumed it was used on the CD5). I'd remove that and run the 202 from the 200 (put the blanking plug back in) to check its not one of the power rails on the flatcap that is at fault. Spending a bit of time reading the connection guide (and taking a few photos of the present connection setup) might help you understand how it is connected before you taking anything apart. It can look a bit complex but it is really quite simple. 

sjw posted:

......

I dont really understand what all the cables are for - didn't need to  as I've just enjoy listening to it

There a naps and a flatcap and wires everywhere so U don't know where the audio signal flows from the pre to the 200

.....

Have you got a Naim mate or a dealer near who could have a look at this for you?

C.

thank you all 

will go through it sat am and fingers crossed

If swapping speaker leads swaps the problem, then all you've proved is that it's not the speaker.

Two separate sources exhibit the same problem so not the sources. There isn't a common thing there like a DAC is there? If so it could be that, or the interconnect from the DAC to preamp. 

This leaves preamp, Flatcap or power amp. Any of the three could be at fault. Without spares it's difficult to diagnose. Leads are notorious for going wrong incidentally, but the preamp should show up a fault on startup in that situation, with the flashing mute button, same as if you wire it up incorrectly.

Fyi, a SNAIC is the stiffer black interconnect between Naim components. It's a 5-pin SNAIC between 202 and Flatcap, and a 4-pin SNAIC from Flatcap to 200. You may also have a 2nd SNAIC powering the analogue section of the CD5XS from the flatcap's 2nd supply (assuming this is a Flatcap 2, 2x or XS). That one is also a 5-pin version. The reason the SNAIC is so stiff is that it carries both signal and power cables and it's shielded so there's a fair amount going on in there.

Frank.