Question about Onkyo TX-SR605 Receiver
My husband was sliding the unit out from the cabinet and one of the wires
came out. He referred to the users manual and under trouble shooting it mentioned the amp protection circuit.
Remove all speaker wires from the receiver and turn it on.
If it still goes into protect, I'll bet the house that one of the channels is shorted out and it needs repair. This is a job for a pro.
If it doesn't go into protect, check for a short in the speaker wire or for a bad speaker.
Posted on Jan 29, 2009
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The protective device on the receiver has been activated because of a short circuit.
("PROTECTOR" flashes.) Turn off the receiver, eliminate the short-circuit problem and turn on the power again.
Generally speaking, an amp protects itself from heat, shorts and overloads.
Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.
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