Limit volume at sony str-de197 - Sony STR-DE597 Receiver

There is a short or an overload. Check the speaker connections, and if there is a defective speaker. If the speakers are okay, there may be a failure in the amplifier circuits. This will require shop service if it is an internal problem.
Jerry G.

It sounds like the switch might be OK mechanically but not electrically. Have a look to see if you can check the connections on the switch. Perhaps there is a broken or loose or bad solder joint.

This has happened on my receiver but it goes away if I switch it off and turn it back on again.

check the connections on the back , specially the speaker wires , make sure the strands are not crossing each other causing the PROTECT SIGN , hope it helps , AJ

I have the same unit. My best recommendation would be to remove all speaker wiring, and try new wiring with another pr of speakers,since the "outdoor " speakers were rained on. the protect mode that the unit went into sounds like it did because the speaker outputs were shorted due to the rain, so ensure that the speaker output terminals are not shorted and dry...also see if output is still availalable at the headphone jack...if it is, the pre-amp section is still good , in which case the protect mode and no volume output out of the speaker jacks may mean that youve blown the ouput trasnsistor finals.
I hope this helps.

bobbymaximus

Check to be sure that none of the buttons are stuck on. With the unit off, press each of the buttons. You should be able to feel the button engage. If they all feel like they are working, the internal switch itself may be shorted in the closed position.

Update this with what you find.

Dan

Have you connected an extra pair of speakers?. (Thereby loading the amp stage beyond it's capacity)
Are the speakers connected to the unit the original ones the system came with or different? ( Speaker impedance, usually displayed at the back of the speaker cabinet must not be less than amp's specifications....6 ohms, 8 ohms)
If you're driving the unit excessively you're lucky this piece is equipped with protect mode, else your speakers and amp would have been fried by now.
One last possibility comes to mind: High volume causes vibration causing loosely fitted mains plug to rattle in wall socket calling "protect" due to improper feed voltage. Move the unit to another wall socket and ensure a tight fit into mains receptacle.

Overload protection circuit kicked in. Check all your wires (speakers,input,output cables), There is a short somewhere and lets hope it's not In the receiver.