Onkyo Tx-v940 Receiver/Amplifier Protection Mode

The Auto Stand-by turns off the receiver if there is no audio or video signal for 20 minutes when set to On. Thus it shouldn't be blocking the receiver from coming on if it is set to Off. When the USB Power Out on Standby (power to a USB device when the receiver is off) or Network Standby (enable network power on requests from the Onkyo app) are enabled, then you get the hybrid standby mode if the Power Management Auto Stand-by is active (On). There is also an HDMI Standby mode for throughput of an HDMI signal.

What devices do you have connected to the receiver? Try turning on a video or audio source before you turn on the receiver. The other reasons for the unit not to turn on is the protection circuit being engaged. This can happen from overheating or a loose speaker wire touching another wire or the back of the receiver. Usually if the unit has the protection circuit engaged, the display will indicate Amp Diag Mode. After the diagnostic test, the display will indicate if there is a problem (SP wire). If there is nothing on the display after the diagnostic, the receiver should work properly when it receives an audio signal to send to the speakers. If the unit has been overheating, make sure that there is good ventilation around the receiver. Also clean any dust off the unit.

Crutchfield has the manual for the TX-RZ730 on the product page: https://www.crutchfield.com/S-lvaBRQ0O5ib/p_580RZ730/Onkyo-TX-RZ730.html . The current link to the manual is https://pdf.crutchfieldonline.com/ImageBank/v20200223150400/Manuals/580/580RZ730.PDF .

I hope this helps. If you heard an abnormal sound or smelled smoke, then the unit has internal damage. Similarly, if the problem continues, I'd suspect a wiring fault between the internal power supply and the main board of the receiver. The unit needs service or replacement.

Cindy Wells

Hi,

Did you check that all the connections are fine and that the cables are not damaged?

HI
check first the Dimmer on your remote or in the front panel .
hope this helps to resolve the problem
regards

http://www.manualslib.com/manual/302311/Onkyo-Tx-Sv414.html#product-TX-V940

This indicates a load on the system, turn receiver off, remove speaker wires from the back of the unit. Now power up and turn volume right down, if the word protect stays off, there is a short in the wires or one of the speakers. But if the word protect comes on, "with wires and speakers dis-connected, it means there is a short in one or more of the audio outputs in the receiver. If you are handy using a digital meter then you may be able to track the shorts down, and replace the parts to get it up and running, also if you can solder then it will make the job easier.

check if it goes to protection mode on power on. see to it that speaker selector switch is set.

Is your speakers connected properly?

Is your music source ok?

Do you hear a click after you switch on the power? the click indicates that the time-on delay transfers the amps output to the speakers which prevents thumps going out to the speakers.

Once it goes to protection mode you need to have it serviced. This is due to a fault in one of the amps and that it protect the speakers from further damage.

There's a fre service manual here, you need to join tte site (free)

Onkyo TX SV727 Manual AV Control Receiver HiFi Engine

If you don't got any sound the audio amplifier IC is damaged you gotta change it.Good luck

you have to verify your connection cause if you are a short circuit in your different output or input the protection mode is on. it's an internal security
first disconnect all your output speakers, and restart your amplifier if the protection mode is on again try to disconnect all your input device and restart your amplifier, the protection mode should be off, so after connect one device after one to check who makes your protection mode on
;)