Question about Onkyo TX-SR500 Receiver

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System lock Hi guys, When i turn on my receiver it tells me system lock and then turns it self off i took it to the shop to get fixed and they told me they cant fix it. the model no is TX-SE 500. i really hope you can help me as i would really like it working again. i bought a sony and it just doesnt compare.. cheers anthony

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Re: system lock


Posted on May 27, 2008

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This is a common question on this site. Amps of all types have protection circuits to keep them from doing a self meltdown. Testing follows this logic. 1. Remove all speaker wires. 2. Keep the volume down - all the way. 3. Turn the unit on. 4. If it does not trip off, then there is a problem either in a speaker or the wiring. a. Reconnect one at a time until/unless it trips off b. That will tell you where to look further.
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Hello aversteegh, hi, in my opinion as a tech guy, I'm really not sure if its worth the repair, there are to much problem with that receiver, but if you plan to service it your self, better not, this takes a lot of diagnosing, as you describe this receiver problems, it points all to power supply and or a main board (possibly controls circuit, the IC that controls every media player), I humble suggest consult first a local tech shop for evaluation or free estimates on the repair. and make sure that the repair is reliable.

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My onkyo receiver (tx8511) keeps going to protect mode when turned on. I have changed the fuse, but dont see any way to overide this mode. Is there another fuse or some way to turn off protect mode

Hi there
To answer your question;
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Was there any source playing through the amp when your kid turned on the system?mabye the cd or dvd.If so the speakers may be blowen,to find out put a finger each side of the dome on the bass driver and press gentley,if you hear a rough sound a little like sandpaper or if the cone is stuck you have blowen sprakers,if not let the amp stay off for a couple of hours it should reset.Ps system lock is in your amp menu at the end of the setup list,but this is to lock your settings.
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Had this problem yesterday.......was getting v. frustrated. My good lady suggested removing the cover, so I did, when she wasn't looking. Turns out that two DVDs had come off the changer and were jamming the drawer. One was Stuart Little III which my girls had been looking for for months. Took the opportunity to bin that 'course, then told the wife that I'd managed to fix the player "Needed the reverse polarity torque resetting pet".
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After boot up, My receiver defaults to "Decoder"

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