Question about Sony STR-DE545 Receiver

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STR-DE545 protect mode

When turned on, goes straight into 'protect' mode, i have been searching online on ways to fix this problem.
i have come to the conclusion that the most likely cause of the problem is the internal ground points, because most people on other forums have complained about this problem and thats been the best responce for it.
seeing as i know little about the circuit boards and not much of a tech person im not sure where to find the ground points to attempt to fix the solder job if needed. a diargram or very clear instructions on where to find these points would be very much appriciated. thanks, Ryan

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Posted on Jan 02, 2017

  • 11 Answers

SOURCE: stuck in protect mode

Speakers shorted out, blew a fuse. Replace the unit or (cross your fingers and) open up the box and find the blown fuse.

Posted on Dec 05, 2007

SOURCE: Sony STR-DE945 Clicking Noise Sound Cutting Out

I had the same problem with STR-DE545; I worked out over time the main board starts to sag, which in turn causes the exposed solder points to earth out on the bottom of the case. Reseating the mainboard along with using non-conductive foam to hold it up, fixed the grounding issue. Hope this helps anyone else with the same issue. :)

Posted on Jul 25, 2008

ginko
  • 19396 Answers

SOURCE: stuck in protect mode

Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

Posted on May 29, 2009

  • 167 Answers

SOURCE: Sony STR-D715 Protect Mode

Hello,
This is a common problem...
It is in fact a bad power-amp module.
I have repaired quite a few of these receivers by replacing it.
The module is inexpensive. I Googled the Part number and found several sources for it.

Good luck!

Posted on Oct 10, 2009

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Go into the settings and select Demo Mode OFF

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Soon as i turn power on my sony receiver goes straight to protection mode can i disconect the fuse to reset it


Resetting probably won't fix it, Sounds like it needs output transistors and some resistors and/or fuses

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Sony str-de545 protect mode?


Disconnect all speaker wires at the receiver and turn the unit back on. If it stays on, your receiver is ok and you need to reconnect speakers one by one and test until you find the one causing the "protection" once you find this, disconnect the wire at the speaker and test again. make sure the + and - wires do not touch! If the receiver stays on, use a multimeter to test the speaker for a short with resistance check. If your not sure how to do this, any home audio shop will test it for free and while you wait. If speaker wires are disconnected and it still shuts down, it needs to be serviced. Hope this helps

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How do i get out of protect mode?


in general protect mode means you have a problem most amps that have this will just need turning off and then on again when the fault has gone. if its not then you may still have a fault maybe bad speaker or a short something like that. if not then the amp itself may be faulty.

Oct 08, 2009 | Sony STR-DE545 Receiver

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Receiver stuck in protect mode


surely i can reset this myself without paying sony!

Feb 01, 2009 | Sony STR-DE545 Receiver

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I just turned my DVD player off when my STR-DE545 was still in DVD input mode and it came up LOCKED, maybe the input that you are using is not receiving a signal?

Feb 03, 2008 | Sony STR-DE545 Receiver

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It works a few minites,then stops and displays "Protect".


Your complaint isn't a problem at all. This is a usual characteristic of the relevant amplifier. The protection mode comes on when the main volume/bass/treble or whatever is too loud. Unfotunately, you can not overcome it. But, as they always say: It's a Sony:)

May 01, 2007 | Sony STR-DE545 Receiver

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