Question about Sony STR-DE185 Receiver

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Getting a "Protect" message in the display which then shuts down

When using the CD or FM tuner - the receiver shuts down and the display reads: PROTECT.

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The speaker wires were al little frayed, so I cut and stripped new 3/8" leads and when re-inserted the receiver worked fine. The problem was a short from the frayed wires touching either the back of the receiver or some other metal near the terminal.

Posted on Dec 08, 2008

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Zone 2 doe's not work Ihavetwo speakers that are outsde they are zone 2 when a am to the tuner I press zone 2 ad it shut off


Possibly a shorted speaker wire? If you remove zone 2 does the amp still shut down? If not, connect one side at a time and try it. Do you see the word protect on the display when it happens?

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Take the cover off and look at the cable that connects the tuner to the main board. Make sure it is connected straight and tight. Make sure all screws in the back are tight, just in case it is a grounding issue. Iff all checks out and you still have issues, replace your tuner.

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Since you have 2 receivers, you can either use the Sony STR-AV570X or the TA-AX380. You will need 3 Stereo RCA Cables to connect your CD Player, Tuner, and Tape Player. The speakers connect to the receiver you choose using the speaker input terminals.

Here is the diagram (click on picture to enlarge):

pctech1_71.jpg

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1 Answer

My receiver clicks on a off randomly.


Hello Fixya customer,

Thank you for your question.

Are you getting on the display, possibly a "P" or "Protect" that indicates it is in the protect mode?

Hitting the top of the receiver indicates a possible intermittent component or board connection. The receiver will shut down when the Microprocessor receives various fault conditions, including shorted speaker and wires, but if it develops an internal fault it will also shut down to protect itself and the speakers.

Remove all speaker wires and inspect th terminals for any stray wires shorting the terminals.

If it still shuts down, then a professional servicer would be required.

Thanks for using Fixya, and if I can help you further, please let me know.

May 01, 2010 | Sony STR-DE545 Receiver

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you need to change the audio amplifier iC´s damaged

Dec 24, 2009 | Sony STR-DE597 Receiver

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My Harman Kardon receiver ( AVR 225) displays "protect" and shuts off when I try to play anything (tape, CD, FM/AM). I unplugged receiver and reset it several times. The sam "protect" comes again.


I used the live chat and the problem was resolved.
Usually the problem are strands of speaker wires which cause shorting and protection shuts off the receiver in order to prevent damage. There was one speaker that I repositioned recently which was causing shorting. I twisted the wires and tightened them in place and my receiver has been working w/o a glitch. I was lucky that I did not have to check all the wire strands on the receiver and all the speakers.
Problem solved and I learned valuable lesson.

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Sony STR-AV770 AM/FM Tuning


If your going to buy an antenna you could do some research at cccrane.com. They might be able to help you with the other problem too.

May 15, 2008 | Audio & Video Receivers

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I suppose that on all speakers connections + (positive) is on +, and - (negative) is on - ?

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2 Answers

PROTECT Mode issue


Here you can get the owners manual for the unit if you need it; http://www.onkyousa.com/download/own_manuals.cfm?cat=Receiver For the protect mode to kick in only for some input sources, then there would have to be a fault in one or more of the pre-amp circuits - there will be a separate one for the radio tuner. Probably the solution for such a good unit is to contact the manufacturers and see what they have to say - probably they will suggest you send it in for service and i suspect they would be right - here are the contact details if you happen to be in the US; http://www.onkyousa.com/support/ or through this link if not; http://www.onkyo.com/ Hope this helps and you get an answer from them - it is probably fixable relatively easily and shouldn't be expensive for parts :)

Jun 23, 2007 | Onkyo TX-8511 Receiver

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