Sony Str De835 Problems......please Help!!!!!!!!

[ghammerle]

I have had this amp for about 7-8 years and just recently in the past few months it just quits on me and the "PROTECTOR" flashes and it kills the sounds. It does it so randomly and I am unable to figure out why it is doing it. At first I thought it was getting too hot but sometimes it will do it after it has sat there all night with nothing else on. It is in a cabinet with a CD player, satellite, DVD. It sits on top so the top is open. I also have a powered sub connected to it and when I turn the amp on sometimes it will POP the sub(just noise like a POP) then it will work fine. I have checked Sony website and done everything they tell me to do. I do have extra speakers connected to it just 2 small ones in another room but these remain off most of the time via volume control. This morning it would come on and then shut down and then I would turn it on and off til it came back on. Currently it seems to be working fine without a hitch even though I did nothing......PLEASE HELP........

 

[TLS Guy]

I have had this amp for about 7-8 years and just recently in the past few months it just quits on me and the "PROTECTOR" flashes and it kills the sounds. It does it so randomly and I am unable to figure out why it is doing it. At first I thought it was getting too hot but sometimes it will do it after it has sat there all night with nothing else on. It is in a cabinet with a CD player, satellite, DVD. It sits on top so the top is open. I also have a powered sub connected to it and when I turn the amp on sometimes it will POP the sub(just noise like a POP) then it will work fine. I have checked Sony website and done everything they tell me to do. I do have extra speakers connected to it just 2 small ones in another room but these remain off most of the time via volume control. This morning it would come on and then shut down and then I would turn it on and off til it came back on. Currently it seems to be working fine without a hitch even though I did nothing......PLEASE HELP........

Something is triggering the the protection to the output stages, I think. What is the impedance of the main speakers, and by the way not nominal, but there minimum impedance? These receivers don't like a low impedance load. Even though your volume is turned down in the other room, the control and speakers still present a load to the amp. I think I would disconnect those speakers from the receiver.

Also check your speaker wiring, and make sure there are no electric whiskers causing shorts. If the speaker wires are in good condition, the unit is not getting too hot and you are diving one set of speakers, this shut down should stop. If it does not, it is time to have the receiver serviced.

 

[j_garcia]

For the cost of servicing you could get a new, better receiver. The DE line is an inferior product, and having owned a few previously, I can attest to this so I would recommend tossing it and picking up a new one.

 

[TLS Guy]

For the cost of servicing you could get a new, better receiver. The DE line is an inferior product, and having owned a few previously, I can attest to this so I would recommend tossing it and picking up a new one.

I would agree. If correcting the speaker load does not connect the problem, I would not put money in that unit.

By the way, when people ask for advice on technical problems, feedback is very useful and instructive. I for one don't mind getting it wrong. This long range diagnosis is very difficult and there are lots of opportunities to get it wrong.

 

[ghammerle]

Still shutting down

I checked what I believe is all the speaker connections and it all seems fine. What I still don't understand is sometimes when I turn the amp on it POPS like a kick drum. It is a Klipsch powered amp and I have it set to auto turn on. What is the phase switch do and what should I have it set to 0 or 180. Right now I have the amp set to about 85hz for the low pass and the high pass to 100hz. I am not sure if those settings are close to what they should be but when working it sounds decent. I realize the amp is not the greatest but if I can make it last til Christmas that would be great then I could just use it in my garage... THANKS AGAIN.......

 

[TLS Guy]

I checked what I believe is all the speaker connections and it all seems fine. What I still don't understand is sometimes when I turn the amp on it POPS like a kick drum. It is a Klipsch powered amp and I have it set to auto turn on. What is the phase switch do and what should I have it set to 0 or 180. Right now I have the amp set to about 85hz for the low pass and the high pass to 100hz. I am not sure if those settings are close to what they should be but when working it sounds decent. I realize the amp is not the greatest but if I can make it last til Christmas that would be great then I could just use it in my garage... THANKS AGAIN.......

There is a component failing, but I could not tell which without the unit under instruments on the test bench. It is not considered safe or advised to run electronics with faults. This fault is likely to take down the speaker driver. It needs service.

Now generally the high and low pass crossover should be set to the same frequency. Depending on speaker roll off slopes sometimes they can be set a little apart.

The phase knob changes the phase angle of the sub out put from zero to 180 degrees. This is to allow for correction of the cumulative phase errors of speakers, speaker position and amp phase inversions. Play music with a lot of deep bass or better still a test tone and adjust the the phase control for the greatest combined out put from sub and mains.

 

[ghammerle]

Componet

When you say a componet, you mean like the cd player or dvd player. I have searched the internet and a few people have said they have had problems with their dvd player maybe. It happens even when the dvd player is off.

 

[TLS Guy]

When you say a componet, you mean like the cd player or dvd player. I have searched the internet and a few people have said they have had problems with their dvd player maybe. It happens even when the dvd player is off.

No I mean the electronic internal components, such as transistors, IC capacitors etc. Your symptoms are particularly associated with a failing capacitor some place, but it could easily be a transistor or IC problem.

Either way the correct advice is to remove the unit from service until it is repaired. This is not something you will fix yourself.

 

[majorloser]

....What I still don't understand is sometimes when I turn the amp on it POPS like a kick drum....

Unless you wish to buy new speakers along with a new receiver, STOP

You can just as easily destroy a whole speaker, a crossover or a individual driver if you have some sort of circuitry fault in you system and continue using it.

And let's not forget that little thing called, FIRE.

 

[TLS Guy]

Unless you wish to buy new speakers along with a new receiver, STOP

You can just as easily destroy a whole speaker, a crossover or a individual driver if you have some sort of circuitry fault in you system and continue using it.

And let's not forget that little thing called, FIRE.

Yes! That's exactly what I'm trying to tell him.