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Unfortunately, the RC-771M remote doesn't control the TX-SR502. It will only work with these Onkyo models: TX-NR1008 and TX-NR808. The RC-567M is the one for the TX-SR502; replacement remotes that are exact replacements are still available from various places including Amazon.com .
Since the TX-SR502 was released in ~2004, that replacement remote probably won't control other devices that were released in 2004 or later. Onkyo changed its IR code programming before the TX-NR1008 was released in ~2010 and the RC-771M can't communicate with the older receiver. The manuals for the receivers listed above are still available from Onkyo on the product page under the Downloads tab.
Please determine if the "Audio" button is actually working.... after pressing the audio button, can you still control the DVD, if not then the remote has switched to the Onkyo. Although, this is not 100% conclusive, unless you have a 2nd remote to test the Onkyo with, it provides a sound basis to proceed.
Assuming the remote is transmitting and the IR receiver on the front of the Onkyo is not otherwise blocked, likely faults include the IR receiver, input to the Micro processor, and the Micro processor.
The most probable fault is the IR receiver.
Thank you for using Fixya, and if I can help you further, please let me know.
You are probably connected to the pre-out jacks. These are not amplified. Connect them to the B speaker outputs(screw down connectors). If that won't work (and it should), you can connect to the "Presence" speaker connections(spring loaded connections).
I couldn't locate any info on your remote, but the usual reset solution if by depressing a reset button that may look like the type your press with a ballpoint pen. check the back and under the battery cover also. If you cant find one, then take the batteries out and leave it overnight and then put them back in the following day and see what happens. If all this fails, please let me know and we can try some more options.
The volume keys should be working by default, but you may have volume punch through turned on (meaning the remote is sending signals for TV or CABLE volume function no matter what mode you are actually on). To unlock volume control for AUX mode, do the following: 1. Press and release AUX 2. Press and hold SETUP until the remote blinks twice 3. Type 993 4. Press and release VOL- The remote should blink four times to confirm unlock.
They are probably referring to any other universal remotes that you may wish to use. Do you have any other remotes that you use, I can find a code for you to match your system. Even some cable have inbuilt codes to drive audio equipment. Makes sense in this day and age.
If this is not a good solution to your problem, then dont rate it yet. Just comment back to this post and we shall investigate further and resolve your problem.:).
Most yamaha codes will work some of your unit functions. try 0176 or 1176. These are for a dvr3 comcast remote. You can get the whole list and manual from here
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get back to me and we can try some more things. Thanks for using FixYa, If you consider the advice I have given you
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