Question about Sony STR-DE345 Receiver

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Str de345 shuts down after a few and flashes (protection) on face of amp.

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The Receiver is going into protection mode and possible some speaker cable might have touched the body or with each other.
Remove all inputs and outputs and then restart the receiver. If it starts then you are lucky and no further repair are required.
Connect all cable and wiring properly and ensure that they do not touch each other. You might have to reset the microprocessor also.

If the problem persist then let me know to further the trobleshooting.

Please do rate this solution and thanks for using FixYa.

Posted on Mar 09, 2009


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Related Questions:

1 Answer

My unit powers up and then goes to protect, why?

This usually means there is a short in the amp section. It needs to be looked at by a pro.

Nov 20, 2012 | Sony STR-DE345 Receiver

1 Answer

No sound. It flashes protect.

Your device has went into protection mode, an internal malfunction causes it to shut down in order to protect itself.
Somtimes a physical reset will help.
Turn of and unplug device fro a couple of hours

Feb 15, 2012 | Sony STR-DE345 Receiver

2 Answers

My sony STR-DE345 amp says "protect" and there is

The manual says it thinks there is a short circuit on the amplifier output side. If it still says Protect after disconnncting all the speakers wires there is an internal problem. Take it to a hands-on tech.

If the problem disappears, you had a short. Attach speakers one at a time to isolate the cause.

Dec 24, 2010 | Sony STR-DE345 Receiver

1 Answer

My Sony model STR-DE345 flashes (Protect) 4 to 5 seconds after the power is turned on. It's not the speakers cause there not hooked up. How can I trouble shoot to find which part needs too be...

Sony receivers in this series do a series of tests on the integrity of the audio path before allowing voltage to be applied to the output transistors.
First make sure the speaker selector is set to "off". Test it again. If it still does the same thing then:
If you are comfortable removing the cover, take out the four side screws and the screws on the rear top of the cover. Look at the volume control and make sure the ribbon cable is firmly inserted in to the slot at the back of the control. The next part is a little more involved. There are two ribbon cables on the circuit board on the front of the face plate. One is close to the front, the other is not. You can remove the face plate and check thoes cables, but you must remove the screws from the bottom of the face plate and the one screw holding the volume control in place.
If this is all in place, I recommend sending it in to Sony for repair.

Aug 29, 2010 | Sony STR-DE835 Receiver

1 Answer

When i turn it on it works 4 a few mins then protect flashs

shorted outputs. it needs parts replaced in the main amplifier section. typically $ 120.00

Mar 05, 2010 | Sony STR-DE345 Receiver

2 Answers

Sony str-de345 this keeps on making a

the clicking is a power suplie overload some output amp is with problems and shutdown after overheat, when you tap is bad connection inside, normaly is related with sound off after 15min. needs to be checked by tech. to ensure perfect operation.

Jan 30, 2010 | Sony STR-DE345 Receiver

1 Answer

Protect flashing

es posible que un canal se ha dañado por lo que primero daño el fusible con la sobrecarga y posteriormente se daño el canal. es necesario se revisen las polarizaciones de los transistores para determinar el canal dañado,es seguro que el daño se encuentra en uno de los frontales.

Mar 21, 2009 | Sony STR-DE345 Receiver

1 Answer

Protect Flashing Sometimes

Dust the cabinet out with one of those cans of "dust off" compressed gas and make sure you have PLENTY of ventilation around the amp.

Feb 24, 2008 | Sony STR-DE345 Receiver

1 Answer


The protect circuit is doing it's job....probably the amplifier
output stage is shorted.....have a technician check it..make
sure any / all bad connects are soldered when chassis is out
for service......................T.

Jan 04, 2008 | Sony STR-DE345 Receiver

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