Onkyo diagrams Unit goes into thermal protect @ approx. 46 setting on volume. Unit was taken outside when outside air temp. was 33 degrees F and the unit's volume was advanced past 80 with no in

SOURCE: onkyo ts595 goes into protect mode with volume increase

HI check your speaker cables are not touching, also make sure "b" speakers are not on and that all your speakers are 4ohm or higher as this will cause the amp to shut down if they are to low an impedeance,The amp is protecting itself when it shuts down.

hope this helps.
CABLE GUY.

SOURCE: onkyo tx-sr602 as soon as i turn receiver on it flashes protect

Does it display any message like "Protect" or something similar? Do you hear a relay click on then off?

Did the amp just not power up one day or did it stop working while you were listening to it? Finally, do you have teenage kids who might have been listening to your receiver and would have "neglected" to tell you that after listening to their music it suddenly stopped working?

It could be an internal fuse but chances are its something that requires a technician to repair (like the output transistors).

Scott Frye

• 1175 Answers
• Posted on Jan 01, 2009

SOURCE: problem with onkyo tx 919 unit

Hi...
If you've had it "fixed" 3 times and the problem comes back either you have the wrong impedance (ohms) speakers connected or the power supply in the unit is the actual problem.

Happy new years,

Scott

Ginko

• 19396 Answers
• Posted on Apr 27, 2009

SOURCE: My 605 turns off and red light blinks when volume goes past 58

Shorted speakers can cause the unit going on protection mode (the red light blinking) when a certain volume is reached.

Test with a set of replacement speakers.

If it is not the speakers, it is probably transistors in the amp final or something nearby. Test also input output board.