My TX-SR502 AV receiver has no output sound in any mode but CD. Thsi has been a progressivly deterioration from sometimes sound to finally no sound.

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.

I wish that I had better news for you.

Cindy Wells

You have to assign each digital input.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Onkyo-TX-SR502-Receivers-manual/id/365ag217/t/2/

Search the document for "assign".

first doing factroy setting by hold "VIDEO1", press STBY until you see "cleared". after that, if problem stay there, then check coil L7002 on DSP board if it is open. the last reason is main CPU (Q7008) defective. this is hard one and final one

I have the same problem, how did you initiate debug mode ?
The receiver worked perfectly until a few days ago, then one day it didn't work when I turned it on but started working after a few minutes. The next day it did the same thing and the folowing day it didn't work at all. Have tried the power reset and also had the top off to see if there's anything really visibly burnt - nothing.
This receiver never got bad treatment, left on overnight a few times but not with sound running out, just powered up. It's a bit enclosed I guess so maybe overheated but I find it hard to believe.
Anyway, can someone advise how to initiate debug mode and also what to do with it.

Thanks

I have the same problem.It's definitely the pre-amplifier board (board with speaker terminals).I did not quite nail the exact component yet but I replaced with a working one and got back sound output.

this could be the pre amp transistor or the power amp that needs replacing
the pre amp transistor is cheap but the power amp is not
if you did not crank it , then it is probably just the transistor that needs replacing

electech

L7002

you have to verify your connection cause if you are a short circuit in your different output or input the protection mode is on. it's an internal security
first disconnect all your output speakers, and restart your amplifier if the protection mode is on again try to disconnect all your input device and restart your amplifier, the protection mode should be off, so after connect one device after one to check who makes your protection mode on
;)

you have to check your output configuration

pls make it reset at factory level ,but pls note that you have to keep it in aauto mode