Question about Sony STR-DE345 Receiver

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Protect Flashing Sometimes

HI I HAVE PROBLEM WITH MY DE 345 THE PROTECT KEEPS FLASHING BUT IT ONLY HAPPENS WITHIN CERTAIN RANGES. lIKE WEHN IM WATCHING TV IT CAN NOT BE WITHIN THE 7-10 SOUND LEVEL RANGE BUT IT CAN BE ABOVE IT OR BELOW IT. THE ONLY PROBLEM IS BELOW 7 REALLY DOES NOTHING BUT PUTTING IT AT LIKE ABOVE 10 CAN MAKE IT HARD TO HAVE CONVERSATIONS WHILE LIKE FOOTBALL IS ON. WHAT CAN I DONT TO FIX SO IT WORKS IN THE 7-10 RANGE

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  • uvaljb May 21, 2008

    Protect flashes - and the amp is not working. happens alot.



    What should I do with it ?

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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.

Posted on Feb 24, 2008

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don't know what kind of radio you have, but usually if a radio is flashing protect it is because you have a short in the wiring, a bad speaker or a bad output ic.

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Protect led flashing with hit of bass


Try a bigger amp. This one wants to be turned down. But seriously the protect can act like sort of a clipping device when the unit is trying to amplify out of a certain range. The transistors may be getting weak and need to be replaced. That said I would move this amp to the midrange or the highs and get a little bigger amp for you low low's. Hope that helps.

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Stand by light just keeps on flashing red and i cant press any otehr buttons it just keeps flashing red


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Flashing protect


the protector comes on to keep the amp from further damaging itself or the speakers. The buzz you heard was probably 60HZ line buzz from the main DC supply conducting full current through one of your speakers through a damaged amplifier transistor. Your stereo will need professional repair. The protect circuit basically opens the speaker relay (and sometimes shuts down the unit) to prevent this DC voltage and current from getting to your speakers until the problem is corrected.

Jun 17, 2009 | Onkyo TX-SV727 Receiver

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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


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

1 Answer

Protector flashing


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.

Oct 05, 2007 | Sony STR-GA7ES

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