Question about Onkyo TX-SR803 Receiver

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Onkyo TX-SR804 power supply

I had moved from US to Turkey and due to the 220V 50Hz as opposed to 110v 60Hz plugs, I cannot use my sr804. Where can I buy a new power supply?

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Re: Onkyo TX-SR804 power supply

If you imply an AC voltage transformer by saying "power supply", I don't believe it will be difficult to find one. If you stay in Istanbul, I recommend that you go to "Dogubank". You can choose from a wide variety of options at that place. All you have to pay attention is that the AC frequency (Hz) of the transformer you're about to purchase. It must be around 50Hz to operate your amp.

Posted on May 05, 2007

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If I would buy a Onkyo TX-NR616 in the US (110V) and take it Europe (220V), wouldn't it be a solution to simply exchange the power transformer for a 220v one?

An stepdown transformer is needed should you buy in US and use it Europe

However, if your on a technical side , trace the primary windings , and check

There are European versions which are already 220V, no need to convert.

Source : page EN 99 of the Onkyo TX NR616


Sep 24, 2012 | Onkyo Tx-nr616 7.2 Thx Certified Network...



The Mainboard on the TX SR804 is falty and i just fixed two units with this solution and it bullet prof un der the HDMI board you will find the mainboard stating up right with its back facing the preamp board and it has 3 screws that secure the mainboard to the system 2 on the middle top of the receiver and one on the right side just under the screw you removed for the HDMI board that secures it to the Audio processor board.
Once the screws have been removed pry the board back going from left to right and slowly disconecting the board. THE FIX. once infront of you clean all of the ribom connectors and the and bend the pins on the connector P954A, P959A , P2005A and P2004A THESE CONECTORS ARE THE REASON THE SYSTEM WILL SHUT DOWN SPECIALY THE FIRST TWO. I ALSO RECOMEND PUTING A INTERNAL FAN POINTING TO THIS BOARDS KEED THE HEAT DOWN. the reason the SUB is low or the HDMI does not seem to work well they are related to the SIF connectors on the the are 4 on this board and i used a thin bud hard plastic and inserted bering each sif cable to push the pins againt it. this is a 20 minute job and you amp will be fixed. i fixed many like this. Have a wonderfull holiday. Mvianna

on Dec 21, 2008 | Onkyo TX-SR804 7.1 Channels Receiver

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Hi Arthur,

First of all, thank you for purchasing the Service/Repair Manual of Onkyo TX-SR804.

Please email me at I will send to you the copy. It is a PDF file format and can't be uploaded here.

Again thank you so much!

Take care and have a great day!

Ratings and feedback are highly appreciated!

Kind Regards,


Feb 11, 2012 | Onkyo TX-SR804 7.1 Channels Receiver

1 Answer

I just bought an Onkyo tx-s804 receiver. and some new rear surrounds. Since I am moving, have not set up anything formally, but have plugged my dvd player into the front video 4 input via an optical...

PCM is what it's receiving from the DVD player. The player has output bitstream settings, too, maybe even speaker configurations and distances. Read its manual.

May 11, 2011 | Onkyo TX-SR804 7.1 Channels Receiver

1 Answer

Onkyo tx sr804 receiver turns on by itself

I have the same receiver and the way to fix is simple. in the main board of this unit there are 5 connectors and they slide into other components like Lego. the issue is the king of material they are made of it's cheap. if you reseat the mainboard it will fix it for a day or two, them it will start again. the easyway is to re seat the board and put a fan inside of the receiver between the transformer and the inside of the amp pointing down about 20 degrees connect the fan to a ajustible voltage adapter and connect it to the outlet in the back of the unit. so it comes on when you turn it on. this voltage adapter is cheap. the adapters people buy for phones and or MP3's at Radio shack or Best buy it goes from 1.5v to 12 volts/ this way you can control how loud the fan is in side the receiver. i find 4.5V does the trick. The connectors on this board start to loose contact with some of the pins when heated. the fan keeps it cool enouth to fix the issue. I fixed manny these ONKYO 804's this will fix it. you just have to do it. the main board is inder the HDMI board in a Vertical position running from one side to almost the Power supply. it has 2 screws also holding it in the inside middle back of the amp. Becarefull with these amps 75 V at 23amp's DC is no joje leave it off for a couple of hours to satart working on it. Good luck.

Aug 26, 2009 | Onkyo TX-SR804 7.1 Channels Receiver

1 Answer

Need help hooking up a KRK powered subwoofer to an Onkyo 7.1 receiver

a single male rca spliting into 2 male rca's ....a signal splitter

Oct 30, 2008 | Onkyo TX-SR804 7.1 Channels Receiver

1 Answer

No Sound

Tell me in details how you connect your whole home theater system.Step by Step.Video and audio connection please.
I need to know does it happen only on certain component(ex. dvd player?)

Oct 21, 2008 | Onkyo TX-SR804 7.1 Channels Receiver

1 Answer

Onkyo tx-sr804 ..problem with the remote


Mar 26, 2008 | Onkyo TX-SR803 Receiver

1 Answer


Check the rated impedance of your speakers. Use the manufacturer's rating. Don't try to measure it with an ohmmeter. This should be printed on the rear panel. If not, check your manual if you have one. The receiver probably shouldn't be connected to speakers rated any lower than 6 Ohms. If the speakers are 6 or higher, check your wires and connections for any stray strands that could be causing a short. I also have to wonder what "increase the volume substantially" means. Are we talking potential hearing damage? Maybe the receiver is saving you from your self.

Oct 09, 2007 | Onkyo TX-SR804 7.1 Channels Receiver

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