Question about Onkyo HTR500 Receiver

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Blown Fuse, needs fix'n

The fuse on my Onkyo HT-R500 is blown. I need to know how to replace it. The manual says its not user-serviceable, but I doubt thats true, and I'm not paying somebody to fix my 5 year old receiver.

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  • Anonymous Nov 21, 2007

    when you turn power in it shuts right of and goes on stand by

  • harley5571 Apr 21, 2009

    I looked at fuse..it seems to be ok..now what?

  • harley5571 Apr 21, 2009

    I looked at fuse..it seems to be ok..now what?

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Regarding the last answe, how do you know if it is slow blow or fast blow?

Posted on Jan 21, 2008

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You CAN open the unit (keep in mind that even unpluged there is still voltage runing through the system, so.... dont fry) and you will notice, if the face of the unit is towards you you will see on the left hand side a power supply board, the fuse is on that board, and it is a tube fuse, 125V 8A. Most stores do not carry the 125V version anymore, but will carry a 250V. This is okay to use where the voltage is not the main purpose of the fuse.

Posted on Dec 27, 2007

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http://www.manualslib.com/manual/302221/Onkyo-Ht-R500.html

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If that is true the power transformer is probably open at the primary, the secondary voltages feed the receiver and power various parts. I suggest getting it checked, my worry is the power transformer may not be available from the parts manufacture.

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Activated protection circuitry means that the amplifier is seeing conditions it does not like and is shutting down the power to prevent further damage.
Either you have a short in your speaker wires, in your speakers, or a blown amplifier.
Disconnect both speakers and turn on the amplifier. Does it still give the error message? If it does, your amp is blown. If it does not, carefully inspect your speaker wires and their connection. Make sure all looks good and reconnect the speakers and try it again. Still get the error message? You likely have a problem in your speaker cabinet(s).

Apr 21, 2009 | Onkyo HTR500 Receiver

3 Answers

I have a onkyo HT-R500 receiver and it keeps blowing fuses.


A receiver that recent usually has a detect circuit that keeps the outputs off until speakers are connected . So, if it bows fuses right away , it's really a power supply issue.
Probably the AC rectifier bridge.

Tech service only.

Dec 27, 2008 | Onkyo HTR500 Receiver

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I found the manual sometime back...try 3Xdouble-u dot eserviceinfo dot com

Aug 06, 2008 | Onkyo HTR500 Receiver

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When a receiver does this, it is know as the "protect mode". This keeps the receiver from causing more damage to the components in it, by shutting it off when it detects an abnormal amount of voltage or current.

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.

To find out just what parts will need to be replaced, you need a multimeter and then you will need soldering tools to remove the bad parts and put the new ones in.

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.

Let me know if you need more help.

Dave

Jul 26, 2008 | Onkyo HTR500 Receiver

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Unit has circuitry problems, take in for service

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Consult HT-R500 operations manual for hook up

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