Question about Onkyo TX-SR500 Receiver

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So how do you replace a fuse?

Unit shuts off immediately after turning on. Standby light blinks. No wires or cables attached. The unit is only plugged into the AC. Guess it's a fuse. No warranty. So how do I go about replacing the fuse?

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Re: So how do you replace a fuse?

Hmm. Tricky problem. It could be the main fuse blown and the standby power suply is only working. Worts case senerio is that one of your amp is faulty and the unit is in protection mode. If the fuse is dead then you are lucky, just get the cover open, remove the power before hand, and do a little search, Most of the time it will be in a glass tube ( glass cartridge type) rated at 250VAC with a nominal of around 5 to 7 amps rated current. U can check it with DMM in a continuity mode. If fuce blown replace with the same rating and it has to be slow blow type. Cheers

Posted on Sep 11, 2007

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Onkyo ht-rc180 standby light blinks will not start.i tryed factory reset, still blinks

The amp protection circuit has been activated. Remove the power cord from the wall outlet immediately. Disconnect all speaker cables and input sources, and leave the AV receiver with its power cord disconnected for 1 hour. After that, reconnect the power cord and reconnect an input and a pair of speaker wires onto the unit. If the receiver still does not turn on than you will have to bring it in for service. Turn up the volume and if the receiver doesn't shut down, power off the receiver and add another pair of speakers. Power up the unit again and turn up the volume. If it doesn't shut down, power off the unit again. Now connect all your input sources and turn on your receiver. If the unit shuts down again, your unit will need to be further serviced at an authorized Onkyo service center.

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Most likely, you have DC Offset(a bad amplifier). The unit is shutting down to protect your speaker system, as well as protect the unit from any further damage. If you require more assistance, or would like to inquire about repairing your Onkyo, please visit my website at You may contact me there. Thank you.

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Standby light is flashing rapidly and I cannot turn on

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In some cases, the STANDBY indicator may blink slowly, twice per second. In this case, turn off the unit, unplug the power cord, and check the following points.

Make sure the speaker cables are not reversed and connected to the wrong sides (+ and -) on the unit.

Make sure the speaker cables connected to the unit are not shorted. (Check both the unit end and the speaker end.)

Make sure the volume does not exceed the level that the unit is capable of producing.

When using the unit in a rack or other enclosed space, heat may build up inside the unit and cause a fire. When installing the unit, be sure to leave suffi cient space between the top, back and both sides of the unit and walls or other AV components to prevent the internal temperature from rising.

After checking these points, plug in the power cord and use the remote controller to turn on the unit. Turn down the volume before resuming playback. Confirm that there are no problems with the speaker connections and playback performance.

If this symptom recurs, request service at your nearest service center.

In rare instances, the unit may enter standby mode and the STANDBY indicator may blink rapidly, 8 times per second. In this case, unplug the power cord and request service at your nearest service center.

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1 Answer

My receiver DRA-395 turns on and in a few seconds it kicks off - the standby light remains blinking the whole time and after shutdown. it will not stay on. i unplugged it for a minute fiquring it would...

Try unplugging everything, including your speaker wires. It's possible that you have a damaged or crossed cable or wire causing a short that activated the receiver's internal circuit. It might have also reheated.

Let the unit sit for an hour. Plug it in (just the power), set the volume to minimum, and turn it on. If it stays on, the issue MIGHT be with a wire or connection, so you should examine all of the tires for damage or crossed connections.

Turn the receiver off, unplug it, reconnect the wires and cables. Plug it back in, make sure the volume is set to the minimum level and turn the receiver on.

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Hello Fixya customer,

Thank you for your question.

The best way to fully isolate the fault is to disconnect all the speaker wires, and verify that there are no strands of wire shorting between the speaker terminals on the rear of the unit.

Turn the volume all the way down, full CCW, and if it goes into shut down with the STBY light blinking then there is a fault in one of the amplifier's.

Thank you for using Fixya, and if I can be of further assistance please ask.

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1 Answer

When I turn the unit on it cycles through its start up but turns right off. little red light blinking. I checked the fuses did the reset on the micro processor with no luck. I also detect a slight burning...

check your speakers for loose or frayed wires touching across causing ashort. if not , remove 1 speaker at a time unit the the unit stops shutting off. replace that speaker and you should be good to go!

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When it is on, does any audio come out of the speakers? If so, you may have a problem in the protection circuits. If no audio is heard, I would first check the speaker wires to make sure there are no strands shorting across the terminals, and that you have the it selected to output audio to the speakers -- Now also be sure to check the various inputs, for instance if it has a FM receiver, select that and see if any audio comes out then as well. I don't know what the cable guy could do other than knock loose a wire or change connections on you.

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