Question about Sony STR-DE597 Receiver

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How to turn off 'Protect"?

Every time I turn it on It goes to "Protect" and goes off. I have cheked speaker wires, and I unplugged it for a couple of hours still the same problem. What do you advise?

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However, If you still have the problem, there is likely damage in the receiver that needs to be corrected. I have a few other posts on this for this receiver. Make sure you don't have shorted speakers connected. One at a time, disconnect your speakers and check them with an ohm meter. If they read 8 ohms, they are electrically ok. Reconnect them to the receiver. If the read 4 or less, they are either of the wrong type or are partially or fully shorted and should be replaced with known good 8 ohm rated speakers with 100 watt program ratings.
Also, you can try using the reset to see if this provides relief. Using the front panel controls, power off. The holding down the 2 channel button, power on. You'll see a reset message on the display. If after this procedure it goes right back into protect mode, the receiver needs professional attention. Best guess is shorted outputs or other damaged components in the power amp section due to wrong type speakers connected or extended high heat operation.

Posted on Dec 12, 2009

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PROTECT is flashing on our Sony Digital Audio/Video Control Center

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You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
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Internal fault.
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If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.


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