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Onkyo A-RV401 amp is not sending any sound to the speakers.

I have a 12 year old Onkyo amplifier(not used that much) that doesnot send sound to the speakers anymore. The owners manual lists an activated circuit protection as one possibility. Can this circuit protection be reset or does this require replacing some electronic part by a service shop familiar with this product? If so the cost may not be worth it. Need your advice!

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The protection circuit is self resetting, it operates only when there is a fault condition in the amp. there is most probably a failure in the output stages of the amp causing a dc offset condition in the speaker output. The protection cct operates to prevent damage to your speakers. It may be difficult to offer a solution to you for this, it gets a bit complex to fix from here...you may have dry solder joint problems in the output stages, or more likely, failed output components. if you have a transistor checker(ohms meter), then you may be able to determine if any output transistors have failed, I recommend taking the amp to a good HiFi guy for repair. Many (including myself) often replace the all transistors to the last 2 stages when outputs fail. assures reliability in the future to repair this way, but the cost goes up a bit also. expect at least $120 to repair is it is a failed output stage.

Posted on Jan 11, 2008

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