Question about Onkyo TX-8211 Receiver

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I think i fried the power supply shorting against the chassis.. is it worth trying to fix it? touched bare speaker wire to chassis while it was on...

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Shorting the speaker wire to the chassis will present a zero(0) ohm load to the final amplification stage. The protection circuit won't have time to react and the output transistors are likely to be shorted. This is a common problem (shorted output transistors) and is easily repaired by a shop that handles audio gear. Expect a parts cost in the $16-$40 range.

Dan

Posted on Feb 05, 2010

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What leads you to think you fried the power supply in your unit? While touching the speaker wire to the chassis is never a good thing it should not have fried the power supply. Might have opened a fuse in the speaker circuit. Have you checked all the fuses yet? Try that first and get back to me and make sure the unit is unplugged before you open it up!!!

hardrocko

Posted on Feb 05, 2010

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New problem?

Did you move it recently? Sometimes the speaker wires are stripped too long and short out against each other in the back

Disconnect EVERYTHING from the unit but please take great care to document how everything is connected so you can connect it again the same way.

IF the unit powers on fine with everything dis-connected, I can assume that you have a connections problem with the speaker wires being the most likely culprit.

Make sure your speaker wires are not stripped too long where bare copper is touching other terminals OR make sure the speaker wire is pushed cleanly into the speaker connections without stray wires to cause a short.

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IF it still shuts down after a few seconds with nothing connected then there is an internal problem that will need to be repaired.

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First guess I have is you have speaker wires crossed or shorting out against each other, check your speaker wiring make sure no bare wires are touching each other, most amplifiers will automatically shut off if it senses a short. It doesn't specify, but i am taking a guess this is a amp/receiver

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This could be due to one of a couple things:
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If protect is coming up on the display, it means the system is detecting a short somewhere on one of the speakers and so is turning the amp off to avoid damage.
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Sounds like there could be a short somewhere. Check to make sure that there aren't any (exposed/bare) wires touching each other or if there is a bare spot of wire touching something metal. Check both ends of all the wires. A speaker wire may have come lose and is shorting out against the frame or some other place. Usually if it goes straight into protection mode or you're popping fuses you have a short somewhere. I assume the capacitor you installed is somewhere on the power line, which would be for helping with
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My stereo is flashing the work "PROTECT" across the front


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