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NAD 712 - Page 9 Questions & Answers
NAD C 520 emits faint hum when I turn it on
This is not a problem but may be due to the surge current that occurs due to the charging of the power supply Filter capacitors. This might be made less with some silicone sealant. Best to have a Technician look at it as it could also mean a too high of current draw due to aged and defective Chinese Capacitors- yes the have infiltrated this business too and are the result of many a failures including flat panel display TV's and computer monitors.
12/25/2012 5:21:38 AM •
NAD Audio...
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Answered
on Dec 25, 2012
How to troubleshoot nad 716 power always off
how to troubleshoot nad 716 power always off• need to open the unit• get a multimeter and measure the DC voltages present on each of the amplifier output stage.• it should be no more than 0.7 V, if it s, remove those pair of powertransistors and test again for output voltages. the negative probeof the multimeter to the chassis of the unit.• if the shuts down problem goes out, assume one of the extracted pair is bad.you can test it individually since it is already outside the circuit.Let me know how you make out with the inspection. It is a good chance you will find something. hope this helps, thanks for using Fixya!
8/6/2012 8:10:10 AM •
NAD Audio...
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Answered
on Aug 06, 2012
Display screen on 501 no
Needs 2 new bulbs. Very common on older NAD players.If you look very closely you'll see the display is infact workingbut just not lighting up hence the need for new bulbs.
7/16/2012 10:19:49 PM •
NAD Audio...
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Answered
on Jul 16, 2012
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