Question about Onkyo TX-DS575 Receiver

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Not operating immediately

I have had no problems with this receiver for 7 years. It recently began not operating upon initial power up (It powers on but no output via speakers). I can only get it to work by cycling through some of the various inputs (this does not always work). I do not know if it is some relay having to do with the various inputs or if has something to do with the length of time the unit has been powered on. Any help would be appreciated.

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Re: Not operating immediately

Cpu mpd720208 send comand -mute- all the time pin 42 AMUT. if you cat this wire after receive is on saund appiar. this is not right, but this work.

Posted on Feb 08, 2007

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How to reset avr5805

n very rare instances, the AVR-5805 internal microprocessor might lock up, or otherwise cause mis-operation. This might be caused due to an AC line surge or line spike noise, or by static electric discharge on or nearby the unit, or to connected components. If the condition cannot be corrected by powering off the unit, including disconnection of the AC cord for a period of ten minutes and subsequent re-connection, then the unit may have to be re-initialized. Doing so will restore the microprocessor to its original out-of-the-box state, with all custom memories and settings erased, and the original factory default settings restored. Only use this procedure if you are sure that the microprocessor requires re-initialization.
1 Switch off the unit using the Main unit's power operation
2 Hold the following STANDARD button and HOME THX
CINEMA button, and turn the Main unit's power operation
switch on.
3 Check that the entire display is flashing with an interval of
about 1 second, and release your fingers from the 2 buttons
and the microprocessor will be initialized.
If step 3 does not work, start over from step 1.
If the microprocessor has been reset, all the settings are reset
to the default values (the values set upon shipment from the

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HK 3380 Receiver - Power turns ON, then within a few seconds displays a PROTECT mode and immediately shuts off. I have checked speaker leads for shorting, etc. This unit was operating perfectly and then...

It seems that one (or both) of the power amps are defective. To have a quick check, take a meter, sett it on the DC voltage and measure the outputs, one by one (with no speaker attached and no signal) for the short time when the unit stays on. If you have high DC voltage on the outputs (one or both) this means that channel(s) needs repairs (most likely the power transistors are blown). If one of the paired transistors is gone you need to replace both of them anyway.
Good lock

Sep 21, 2011 | Harman Kardon HK 3380 Receiver

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I have had my Denon AVR-485 for a few years without a problem, just recently when you turn it on it shuts down within a few seconds. Any suggestions?

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Aug 21, 2011 | Denon AVR-485 Receiver

1 Answer

Immediate power off anfter turning on.

Just a further note..
Before you replace the fuses, (be sure to get an identical replacement, wouldn't want to start a fire), so you remember how long ago you began to have this problem, and, if you can recall anything that might have caused it?


Mar 25, 2009 | JVC RX-D301S Receiver

1 Answer

Rear speakers not working

  • Try this on your rceiver to see if it corrects your problem .If not make sure rear speakers are activated and properly connected
  • Sound Field Clear Mode
    The preset sound field is cleared when this mode is activated. Use
    this mode before returning the product to clients upon completion
    of repair.
    1. While depressing the [MODE +] button, press the power `/1
    button to turn on the main power. The message S.F Initialize
    appears and initialization is performed.

Dec 05, 2007 | Sony STR-DB940 Receiver

1 Answer

Immediate shut

Unplug all the speaker wires first, then unplug the unit from the wall for at least 24 hours, The plug back in without the speaker wires or anything else plugged in. Then see if it goes to the protection mode. If it does not, plug in each speaker at a time, and see if any speaker, when hooked up, makes the receiver shut down. If it does shut down, My friend, I'm afraid you will need to take this unit into a repair shop, OR get a new unit. Good Luck

Jun 06, 2007 | Yamaha RX-V630 Receiver

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Yamaha Receiver RX-V630 not working (resets itself immediately)

This maybe an easy one. Have you unhooked all the wires going in to the stereo. "SP wires" means you have wires to the speakers are touching and the stereo is shutting down to avoid overloading. Hope this helps...

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Yahama receiver Rx-630 not working

The problem might be caused by two major circumstances. 1)Touching wires 2)Overheating. I suggest you unplug all wires connected to the amp then turn on the amp. If it gets turned on then we know that the problem is that you have touching wires. If there is a short circuit somewhere, get rid of it. The ventilation is another important issue that you have to pay attention. It simply causes overheating.

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1 Answer

Receiver turns on and off in endless cycle

Its one of Three problems. The main b+ filter is defective, one of the standby power sources have a bad capacitor on the line, or theres a short in the main amp. section. Its probabvly going to cost you more then you would care to invest in a reciver thats around 5 to 6 years old. Its most likly time for you to upgrade to a suround sound dydtem with new fancy lights bells and whistles. Good Luck

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