Question about Sony STR-K840P

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Sony STR-K840P channel fuse replacement - Sony STR-K840P

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
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Posted on Jan 02, 2017

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Tinu Patel

  • 6 Answers

SOURCE: Sound turns off for Sony STR-DE875 amp

If you do not here a click as soon as the power is turned on, (note you must be in a very quite environment no noise absolutely to hear this) then the amplifier has blown output transistors which are pushing DC current to the speakers.

Posted on Sep 01, 2007

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Anonymous

  • 1 Answer

SOURCE: I have a Sony STR-D565 Receiver. I bought new

I resently hooked up my sony std d 565 reciever for 5.1 speakers and I keep hearing beeping, what is wrong?

Posted on May 01, 2009

dunnbiker

David Dunn

  • 8546 Answers

SOURCE: I have a Sony STR DB930. Something happend and it

The fuse blowing is a symptom of something seriously shorted internally. What preceded the initial problem? Smoke is bad. Fire would be soon to follow without the fuse blowing. Take it to a tech.

Posted on Feb 09, 2010

dj_relly999

dj_relly999

  • 4070 Answers

SOURCE: STR-DB940 Sony receiver will not send sound or

Hi and welcome to FixYa!

Check the back part of the unit. It usually has a fuse that protects the unit from power overload. But since the unit is working then the problem can be on the inside. Capacitors and circuit boards should be looked at. They may need replacement to resolve the issue.

Hope this helps and thank you for using FixYa! Have a good one!

Posted on Jan 06, 2011

dunnbiker

David Dunn

  • 8546 Answers

SOURCE: we turn on our sony STR/K840P receiver and it

No, it's in trouble.


Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Eure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Posted on Feb 28, 2011

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1 Answer

Can't use my Sony model STR-K840P. Serial number. 8825701 don't know how to use the components have no diagram


I located an online PDF manual that covers your receiver unit. The cover has a different model Sony number on it but it is the same unit. It will give you a comprehensive run down on connecting it to your other home entertainment devices and all the functions -
https://docs.sony.com/release/STRK840P.pdf

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The problem might not be your remote. It could be your IR sensor in the reciever.

Apr 10, 2012 | Audio Players & Recorders

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How to use a optical conection


You must first check to see if the optical sound is an option on both the reciever and the item going into it, then buy the wire and it will plug directly into the ports.

Jan 11, 2012 | Sony STR-K840P

1 Answer

We turn on our sony STR/K840P receiver and it wont work the only thing it is doing is flashing protect wires are ok is it a parent lock if so how do we turn it off


No, it's in trouble.


Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Eure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Feb 28, 2011 | Sony STR-K840P

1 Answer

Hi i am a new member and i have a problem with my str-k840p it started to have a protect mode flashing and I can't hear the at all the tv or speakers. What could i do i check all my connection and they...


Hi,
Protect display indicates that receiver is in protection mode due to some serious problem in output amplifier section and most probably any output channel output chips got shorted out.
Protection mode turns On to avoid any further damage in receiver. If your Sony STR-K840P is under warranty then call numbers written on warranty documents to ask warranty cover and if unit is out of warranty then either Sony service center or local repair shop will help you to get it fixed, it is not user level repair.
Hope these info will help you.
Let me know if you have additional question.
Thanks.

Nov 29, 2010 | Sony Audio Players & Recorders

1 Answer

Surround sound won't work


Try Googling (sony)(STR-K840P)(manual) without parens.

May 25, 2017 | Audio Players & Recorders

1 Answer

Str-db790


The output stage on one channel may be damaged or there may be a blown fuse for the side with no sound. If a fuse is blown, this is an indication of a fault condition.

Also, before assuming a failure, make sure that all the controls or setups are in their proper settings.


Jerry G.

Oct 12, 2007 | Sony STR-DB790 Receiver

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are these the speaker output fuses...if yes, they should be on back panel. if no, then are you also looking for board mounted fuses on the pc board?

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