Question about Sony STR-DE715 Receiver

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Display The display screen on my STR-DE715 receiver does not light up.  Is there a way to reset the system to activate the display.? thank you

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Re: Display

There is a 2.3A 125V fuse on the power supply board you will need to replace. Radio Shack has them for about $3 for a bag of 4, however, they are 2.3A 250V fuses. The difference in voltage will not matter. Remove the top of the unit and you will find the power supply board down in the back left hand corner. The power cord feeds into it.

Posted on Dec 03, 2009

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Re: Display - Sony STR-DE715 Receiver Audio & Video Receivers

Protector appears on the screen

Posted on Jan 01, 2008

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Protector mode on what to do

Might be short circuit protection or over load protection activated. Contact any service technician, to confirm what the reason is. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".

Jun 18, 2014 | Sony STR-DE715 Receiver

1 Answer

Sony STR-DE375

there are a number of possibilities, bad solder connections on the display board, missing B+, a defective driver display ic, this is a situation a diagram would be helpfull.

Mar 10, 2012 | Sony STR-DE375 Receiver

1 Answer

Sony STR-DE715. Unable to use because PROTECTOR keeps coming up on screen. If solving the problem requires the remote I will be out of luck as it is missing .

First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the protect show or not . if not, then any of the speaker is damaged. If then also it shows protect you have to check the amplifiers hardware.

AV receivers shows protect mode , when there is a hardware fault in side it. Its a warning that some thing is wrong.
Normally AV receivers show this when any of the output amplifier have some problem. there are five amplifiers in this AV receiver. May occur when the output diver transistors of any of the amplifier become shorted. if the output transistor get shorted this will lead to flow of current through the speakers. To prevent this there is a protection circuit for each channels. One combined output of this protection circuit is connected to the system control. when the any of the output amplifier fails, the protection circuit detects it and switch of the speaker and sent data to the system control. when the system control get this data it will give a warning to the customer through display that PROTECT.
You have to check the amplifier.
For that you need digital multimeter,soledring iron screwdrivers etc
Open the amplifier , then power it on. connect the negative terminal of the multimeter any where in the chase( metal body of the amplifer). then connect the positive terminal to all the output transistors emitter pin one by one . the voltage should be bellow 0.5V. If any of the emitter of the transistor shows voltage more than 0.5V., then that amplifier stage is faulty. Remove the transistors and check it. if it is shot then replace with a new one.
after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial.
You can do this easily remove the mains fuse. put the bulb in a holder. now you have to wire from the holder. connect one of it to the one end of the fuse holder and the other wire to the other end of the fuse holder. Why using a bulb is, if there is any further problem in the amplifier stage on which the transistors replaced, there is a possibility of the new transistor get damage. if we use a bulb in serial with its mains supply ,when any overload in the amplifier occur the bulb will drop the current, by lighting itself.
After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check
connect the power and check.
If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components.
I have the service manual for the same. if you need the same will sent it to you. For that i need your email id. As it is a large pdf file can't sent through fixya.

Jun 13, 2011 | Sony STR-DE715 Receiver

1 Answer


I believe what you want to do is as follows. Turn off the power supply. Hold the buttons 6, 7, 8. And turn on the power. The display should activate all options, then turn on and off a few times and finally display End. Then the memory should be reset back to Factory.

Apr 11, 2011 | Sony Audio & Video Receivers

1 Answer

How to hard reset a sony str-DE898

I couldn't find anything about a Lock Code in the manual but here's the general setting-reset procedure:

Turn OFF the receiver
Hold down the I/0 for 5 seconds - "PUSH ENTER" appears on the display

Apr 08, 2009 | Sony STR-DE898 Receiver

1 Answer

Function Selector Bypasses Input Sources

Hopefully this post isn't too late... That receiver has the ability to disable certain inputs. The easiest thing to try is to do a factory reset.
1. Turn off the receiver
2. Hold down DISPLAY and PANEL UP/DOWN buttons and press power.
3. All Clear should appear on the screen.

Unfortunately, this clears out all of the other settings on your unit. It should, however, re-enable the inputs.

Let me know if this helps!

Dec 28, 2008 | Sony STR-DA90ESG

1 Answer

Sony STR de845, 5.1 Surround does not work. 3.2 is indicated o

3.2 IS the "5.1" mode for this receiver. 3.2 is indicating that you have 3 front channels and 2 rear channels. The ".1" is applied to all the speakers (LFE). If you read the manual on page 37, you'll see that "3.2" is displayed with either "Dolby Digital 3.2" or "DTS 3.2". The little icons of the speakers in the display window will show you which channels are active. The bottom line is as long as you see the blue light, it's decoding multi-channel discreet surround sound (at least 5.1).

Nov 22, 2008 | Sony STR-DE845 Receiver

1 Answer

Sony STR-VX550 receiver does not respond correctly to commands from optional Sony RM-S750 remote commander. Remote is working properly and activats all functions on my other STR-VX550. Only on/off command...

If this is a recent occurrence, unplug receiver for 20 minutes. This will reset the receiver. If the remote is programmable, reprogram it for the receiver. If you do these steps and it does not work, you need a different remote.

Aug 22, 2008 | Sony Audio & Video Receivers

1 Answer

Protector appears on the screen

I have the same problem, i also have a STR-DE715. I have two thunder acoustic speakers and two 12in. punch subs. Now when i only play the subs i can go max volume, no problem, great bass the whole deal. Then when i play the thunder speakers i cant even go half way without the receiver shutting off and saying "protector" on the screen(both the speakers are 120 watt). From personal experience i think it could be the speakers youre using, either the receiver is giving too much juice and its preventing the speakers from blowing or the speakers need more power and the receiver cant give it. So a new set of speaker might be what you need. The receiver is 280 watts so something in that zone should work out. Also try turning off the sound field if you're using more than two speakers for the front output (i read this in the manual, you can pull up the users manual on and see if you can find something i might've missed) it supposed tp help it in one way or another. E-mail me at and tell me if your problem was fixed or not. Im pretty curious myself to find a solution to this problem. hope this helps!

Jul 15, 2008 | Sony STR-DE715 Receiver

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