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Old 24th February 2010, 11:16 PM   #1
Phil50 is offline Phil50  United Kingdom
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Join Date: Jun 2008
Default NAD 319 Crackling?

Hi all
Just got hold of a NAD 319. It seems to be working but there are two small problems. There seems to be a mild crackling when I connect my speakers to it. Mission 7's. I measured the DC offset and its about 4mv per channel on the speaker outputs. I cant see anything on a scope to speak of. The only thing thats odd is the voltage seems a tad high on the protection PCB the two regulators are + and -24 volts but one is 33 volts.
I traced it back to the inputs of the Zeners D658-660 and there is + 72 volts and -67 volts.
Any ideas?

Also what is the correct sequence of relay activity on switch on.

I assume its the mains relay followed by the selecter input relay followed by the Speaker protection relay.
thanks

Phil
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Old 1st March 2010, 11:36 PM   #2
Phil50 is offline Phil50  United Kingdom
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Join Date: Jun 2008
thanks for the replies. I have solved the problem now.
cheers
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