Question about Sony Home Theater Systems

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Sony STR-D460Z receiver

Receiver will power up fine then goes in to protect mode. I turned my STR-D460Z sony reciever on with my Samsung TV, Sony Surround Sound Speakers, and Samsung DVD player hooked up to it and it worked for over a year but it didn't work this time. The manuel doesn't help, all it says is to eliminate the short then turn it on but it doesn't tell us anything els. I unplugged everything from it and unploughed it then plugged it in and turned it on but it just came on and flashed "protection". We pulled the cover off and ran the cleaner through it gently, put it back together, turned it on with nothing plugged into it and it still flashed and flashes "protection".

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  • Scott Frye
    Scott Frye May 11, 2010

    HI...

    Is there a separate switch on front for turning ON/OFF the speakers?
    Are ALL the speakers connected when you try to power up?
    If so...it very well might be a blown amplifier output.


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  • Sony Master
  • 1,635 Answers

A common cause are failures in the amplifier output stage, the drivers, and some of the support components. You will have to send the unit out for service.

Jerry G.

Posted on Feb 09, 2009

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1 Answer

Why is protect is flashing on display


There is a defect that is causing the light to come on. It could be a bad output transistor or some other defect that produces excessive heat. The cooling fan could be at fault too.

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Sony home theatre system


Hi,

Good enws is yout unit is not fried. Bad news is you need to get the protection fuse replaced...

Mar 04, 2008 | Home Theater Systems

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Sony reciever shows protect on display


May be bad connections on the preamp ic's. Otherwise there is a short in the amp that needs to be repaired.

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I've got a Sony STR-K880 Cinema surround system and the remote control won't work it anymore! The only thing it will do is turn the system off when I push the'AV I-O' button and the &#


I had the same problem. Found the fix in this document
STR-K880 service manual
On the amp, while powered off:
"While depressing the INPUT MODE button, press the POWER button to turn on the main power."
You may need to do this more than once.
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1 Answer

I have a Sony STR-DE945 home theatre reciever, i keep gettin a clicking sound and then my surround speakers cut out.


It's probably your fan.

The system runs hot, as it supplies a lot of power to push your speakers.

The system knows that without a fan, it will overheat. If the fan gets hot, the system will throw its self into safety mode, to keep it from burning its self up.

Have a tech check your fan.

Nov 18, 2010 | Sony HT-DW610 System

1 Answer

My sony reciever is on protect i would like to know how to take it off protect


Probably has an internal short (output transistors I'd bet) around $100-$120 to get fixed. But first remove all the speaker wires from the receiver and see if it still goes into protect.

Nov 25, 2009 | Home Theater Systems

1 Answer

RC cable in headphone jack then to power source now ''protect''


This generally means that you've got a short somewhere.  You most likely *don't* need to bring it in for repair.
If you're familiar with how your system's set up, do the following: 1) Unplug the receiver from the wall. 2) Unplug your gear from the receiver 3) Plug the receiver back in 4) Plug each individual component into the receiver, and test it as you go.
The "protect" is there to protect you from damaging your system, which is why it still works (sort of.)
If that solution doesn't work, check all your speaker connections.  One may have come loose, and you've got positive and negative connections touching each other.

Mar 18, 2009 | Sony Home Theater Systems

1 Answer

"protect" on the screen


Protect mode will kicking whenever a fault is detected.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

Internal fault.
Internal fault is the natural cause for protect mode. If all the above did not work, then the problem is a blown component or an internal fault. In this case the unit must be taken apart , tested and repaired by an experienced person.
If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.

Regards.

Jan 18, 2009 | Samsung 650W 5.1-Channel Home Theater...

1 Answer

Protect mode shuts down the receiver


If this happens only when connecting the receiver, chech the receiver cable. If the cable is fine, receiver connector at the back of receiver is faulty.

Protect mode will kick in whenever a fault is detected.

You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

Internal fault.
Internal fault is the natural cause for protect mode. If all the above did not work, then the problem is a blown component or an internal fault. In this case the unit must be taken apart , tested and repaired by an experienced person.
If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.

Regards.

Dec 23, 2008 | Samsung HTZ-510 Theater System

2 Answers

Lock up


It probably is but may require a service person to physically open the unit up and do some testing/repair work which can be expensive if you dont know somebody or have the skills yourself.

Nov 08, 2007 | Sony STR-DG500 System

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