Question about Onkyo TX-SR603X Receiver

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Powers off when I press the power button

I read in the user manual that this usually means that the amp protection circuit has been activated. It goes on to say that I should bring the unit to a dealer. Is there any way to reset this circuit without sending into the service center?

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  • jalex08844 Oct 07, 2008

    Thanks. This unit has been off for over a week now. It shut down while in use and the cabinet felt very warm, but I unplugged it the moment the component failed.



    So if the circuit resets itself after cooling down and it hasn't done so yet then it sounds likely that a repair visit is needed, would you agree?

  • Anonymous Dec 22, 2008

    whem i tray to turn on is going to stan by

  • cevans276 Apr 06, 2009

    My onkyo tx-sr603x does the same thing. I took it to an onkyo repair center and they could not get the receiver to duplicate the problem. It goes into circuit protection from standby instead of powering up correctly.

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  • 599 Answers

It resets itself when cool..something is causing it to trip that is non serviceable ,or rather, Should be serviced by them

Posted on Oct 07, 2008

  • milespeed Oct 07, 2008

    completely agree..and should be a completely warranted issue unless they can blame a power spike from your source...which is unlikely if you have other components also running off same source and they are fine ..:)) good luck and keep us posted

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3 Answers

Power problem


If the protect function works but is causing you problems, cancelling the protection function should help, and it will be possible to enter the self-diagnostic function mode. This should disable all functions of the protection mode, excluding the 'excess electrical current detection' feature.

While pressing the "Tone Control" and "Info" keys, try pressing the power key to turn on the power. Keep pressing those 2 keys for 3 seconds longer.

this should activate the Self Diagnostic function, with your Protection Mode disabled.

in this mode the 'sleep' section on the tv's fluorescent display flashes to indicate that the mode is properly activated.

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1. Unplug unit from wall.
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Connect power cord to mains and wait 5 seconds or so. While holding down "info" and "tone control" buttons, press "main zone" power button briefly and release, but keep "info" and "tone control" buttons pressed for at least 3 more seconds. The unit should power up. Assuming the reason for the protection has passed or been fixed, the unit can now be turned off and then back on with the "main zone" power button to restore normal operation mode.
If the protector activates again, the fault is still present and the unit needs to be repaired, ideally by a Yamaha authorised repairer.
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