Question about Sony STR-DE875 Receiver

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Protect light when I turn on my receiver after 5 sec all it says on display protect

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  • trev675 Feb 15, 2009

    I have a Sony STR DE 705. Approximately 5 seconds after I power on the Amplifier, it flashes PROTECTOR, and will not function. I have disconnected all speaker wires and tried to power on but have the same result. What parts would I need to fix the problem myself?

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  • Master
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Protect mode indicates that a problem was detected in the final stage of the output amplifier. As Ginko stated, there are a number of reasons for this. The most common is that the output transistors have shorted. The easiest way to confirm this as an internal problem rather than crossed speaker wires or a damaged speaker is to disconnect the speaker wires. If the unit still stays in protect mode, then the problem is internal to the unit. A reset will no clear this problem.

Expect a parts cost between $15-$25 or so. Add in the local labor rate for the total repair cost.

Dan

Posted on Jan 05, 2009

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  • Sony Master
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Protect means that an internal error, as a blown component, a short , or a wrong voltage had been detected.

Try unplugging the unot from all cables, including power cord, for ten minutes. If the unit is still on protection after restart, then you need to have the receiver taken apart and inspected by a technician.

Posted on Jan 05, 2009

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The version number of m icroprocessor is displayed only for 3 seconds.
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E1A48K0N/0FFPo
FFFFFF0 0 000
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