Whilst SMD doesn't help matters the main issue is the same as its always been with mains SMPS ie that it either works perfectly or literally goes bang and explodes shrapnel of bits of mosfet etc in yer face! There is very little in between. Hence when repairing them you may have replaced say 10 parts that are definitely blown but if there is one part that looks OK, measures OK on a DMM, but is dodgy under load then 9 times out of 10.. BANG!!!! and everything you've just replaced has been blown up again.... It HAS to be perfect at that moment you switch it on.. no if's no but's... worse still, as they deal with rectified and smoothed mains @ 340V there is no practical way, once you've checked everything that you can, that you can be sure all the parts are going to handle 340V other than actually switching it on to test it...
Worse still... you can't measure any of the voltages for diagnostic reasons unless it's working... catch 22!
Have you tried the old light bulb in series with the mains trick? Back in the 80's + 90's I repaired loads of switched mode PSUs using this technique.
On some occasions I was fortunate enough to have a variac.
Most SMPSUs should begin working from around 80 vAC which usually provides enough opportunity to establish if there are any remaining faults.
Whilst SMD doesn't help matters the main issue is the same as its always been with mains SMPS ie that it either works perfectly or literally goes bang and explodes shrapnel of bits of mosfet etc in yer face! There is very little in between. Hence when repairing them you may have replaced say 10 parts that are definitely blown but if there is one part that looks OK, measures OK on a DMM, but is dodgy under load then 9 times out of 10.. BANG!!!! and everything you've just replaced has been blown up again.... It HAS to be perfect at that moment you switch it on.. no if's no but's... worse still, as they deal with rectified and smoothed mains @ 340V there is no practical way, once you've checked everything that you can, that you can be sure all the parts are going to handle 340V other than actually switching it on to test it...
Worse still... you can't measure any of the voltages for diagnostic reasons unless it's working... catch 22!
As you're giving legal advice, presumably you're legally qualified. Perhaps you might like to direct us to the Act, and the section of the Act that states that all items sold in England and Wales bear a six year warranty, rather than directing us to a newspaper article.Hi,
You are entitled to a 6 year warranty. So, Nord must respond positively.
If they do not, then the following website shows how you can progress :
https://www.which.co.uk/consumer-ri...ovider-wont-honour-the-warranty-what-can-i-do
I checked the website, and it does not state that the warranty is not 6 years - in fact, there are no statements of warranty. Is there anything in the literature you received with the amplifier on warranty ?
Regards,
Shadders.