Question about NAD C720BEE Receiver

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Receiver fuse continuosly blows when replaced and powered up

I am having difficulties with my stereo receiver in which the fuse blows every time I have replaced it. I even uplug the amp in the case that this is somehow causing the overload to the fuse. I'm assuming that one of the resistors is bad or something of that nature. What do you think? Help is greatly appreciated :)

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When a fuse blows it indicates that too much current is flowing. This melts the wire in the fuse.

What is actually damaged is hard to say, remove all the cables and test. If the fuse still blows take the unit in for service.

I doubt that a resistor has died, more likely something has created a direct short. It could be a power supply issue, or an issue with the amplifiers.

Ask for a quote first if it is out of Warranty.

Posted on Apr 03, 2008

Ir's not likely to be a resistor. Sounds like a shorted component in the power supply. A diode or bridge rectifier, or possibly a transistor or Regulator IC.

Hope that helps...

Geno

Posted on Apr 03, 2008

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If you had to replace the fuses, it is most likely that you have a blown channel in the receiver.

You put 8 amp fuses in, so I hope that the fuses that blew were 8 amps as well. If you put fuses in that are higher rated in amps than the ones that blew, you will most likely cause more damage to the unit than need be. If the fuses keep blowing, please stop putting new fuses in again until the unit is repaired. Every time a fuse blows, it is because of too much current is going thru the unit. Having too much current is a very bad thing for electronics, it causes components to short out and sometimes even catch fire if the fuse is higher rated than it is supposed to be.

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When an amplifier channel gets blown, there are normally around 5 to 10 parts that will need to be replaced. If you do not replace every single bad part in the channel that has blown, you will most times blow up all the new parts that you just put in.

If you have no experience with electronics, you really should take it in to a service center for repair. If you are willing to try it yourself, let me know and I will guide you thru the troubleshooting steps to help you identify all the faulty components.

Onkyo is very well made equipment and is worth getting fixed.

A blown channel can normally be repaired for around $100 to $150, just depending on the shops rates and the extent of the damage.

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