NAD 302 amplifier on off sound repeating. - UK Vintage Radio Repair and Restoration Discussion Forum

tobywarren44 · 22nd Oct 2017, 5:20 pm

Hi, I am new to this forum so hi to you all, I have an NAD amplifier that I have just turned on after around a year of so, When I turned the power switch on the green light came on but now the power switch just keeps making an off on sound ie a click like you get a second after turning on, It is just repeating itself every 25 seconds, any help would be much appreciated.

Thank you.

Grubhead · 22nd Oct 2017, 9:28 pm

Presumably a relay of some kind that is activating then switching off due to an overload. Check the main output stage for faults such as shorts.

Tractorfan · 23rd Oct 2017, 9:33 am

Hi,
Could the speaker leads be shorted somewhere, or not connected properly causing the protection system to kick in?
Just a thought as I don't know this amp at all.
Cheers, Pete.

22nd Oct 2017, 5:20 pm	#1
tobywarren44 Retired Dormant Member Join Date: Oct 2017 Location: Hastings, East Sussex, UK. Posts: 1	NAD 302 amplifier on off sound repeating. Hi, I am new to this forum so hi to you all, I have an NAD amplifier that I have just turned on after around a year of so, When I turned the power switch on the green light came on but now the power switch just keeps making an off on sound ie a click like you get a second after turning on, It is just repeating itself every 25 seconds, any help would be much appreciated. Thank you.

22nd Oct 2017, 9:28 pm	#2
Grubhead Heptode Join Date: Dec 2016 Location: Sheffield, South Yorkshire, UK. Posts: 539	Re: NAD 302 amplifier on off sound repeating. Presumably a relay of some kind that is activating then switching off due to an overload. Check the main output stage for faults such as shorts.

23rd Oct 2017, 9:33 am	#3
Tractorfan Dekatron Join Date: Mar 2008 Location: St. Frajou, l'Isle en Dodon, Haute Garonne, France.(Previously: Ellesmere Port, Cheshire, UK.) Posts: 3,184	Re: NAD 302 amplifier on off sound repeating. Hi, Could the speaker leads be shorted somewhere, or not connected properly causing the protection system to kick in? Just a thought as I don't know this amp at all. Cheers, Pete. __________________ "Hello?, Yes, I'm on the train, I might lose the signal soon as we're just going into a tunn..."