Question about Onkyo TX-SR603X Receiver

1 Answer

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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  • Master
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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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My unit powers up and then goes to protect, why?


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2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

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On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

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If the TV goes off completely, then is usually a faulty power board.

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

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If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

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