want to use Headphones and main speaker

[Rizwan77]

I have Sony Home theater and want to use headphones without cutting main speakers , How to do that ?

 

[Alec_t]

Welcome to maker.pro.
What audio output sockets are available on the system?

 

[Harald Kapp]

It's probably his Sony dz640.

 

[Alec_t]

If so, then it looks as though it would mean tapping into the Front R and L speaker connections and applying the signals via variable attenuators to the headphones. I haven't checked if there is any module already available online to do this.

 

[Rizwan77]

Its DAV-SR4W, have stereo head phones jack , its 5.1 out for speakers, I want both at a time

 

[davenn]

Its DAV-SR4W, have stereo head phones jack , its 5.1 out for speakers, I want both at a time

Presumably, this ? ....

 

[davenn]

I want both at a time

I have to ask the obvious Q .... Why ?

 

[crutschow]

The only way I can think of to keep both on is to remove the cover and see if you can modify the headphone jack.
Below is a typical connection for such a jack:
The two stereo signals go to pins 2 and 3.
When there is no headphone plugged in the signals go out pins 4 and 5 to the amp.
When the headphone is plugged in it mechanically forces the contact between pins 2-4 and 3-5 to open, while contact is made to the headphones.
So to allow the speakers to always be on, you would solder a wire between pins 2-4 and pins 3-5.

 

[Rizwan77]

Presumably, this ? ....

View attachment 58761

Yes, you are Right same amp

 

[Rizwan77]

The only way I can think of to keep both on is to remove the cover and see if you can modify the headphone jack.
Below is a typical connection for such a jack:
The two stereo signals go to pins 2 and 3.
When there is no headphone plugged in the signals go out pins 4 and 5 to the amp.
When the headphone is plugged in it mechanically forces the contact between pins 2-4 and 3-5 to open, while contact is made to the headphones.
So to allow the speakers to always be on, you would solder a wire between pins 2-4 and pins 3-5.

View attachment 58764

I am looking that kind of solution , only question is , that bypass make any harm to main amp ?

 

[crutschow]

I am looking that kind of solution , only question is , that bypass make any harm to main amp ?

All that would do is put the amp and headphones as a parallel load and I don't see how that would harm the amp.

 

[Rizwan77]

I attached the pics of headphones jack and its wires going to main board, can you guide me which one need to be shorted ?

 

[crutschow]

I attached the pics of headphones jack and its wires going to main board

Need to know exactly which are the jack pins on the other side of board.

 

[Rizwan77]

I am still not sure about 2 3 4 and 5 pins, how to check this ? Which part's pic you want to figure out the connection

 

[crutschow]

Which part's pic you want to figure out the connection

The pins from the jack should go through the board.
Need to see the pins on that (other) side of the board.

 

[Rizwan77]

That pic is back side of jack on pcb, only jack placed on this small peice, I mentioned it with red line , with 2 channels connectors

 

[crutschow]

You will need to use an ohmmeter to determine which pins are connected together when there is no plug into the jack, and all the pin connection to the plug outputs when the plug is in the jack.

 

[Rizwan77]

As I check and come to my knowledge , mechanically it cut common not L or R , I try to illustrate in pic with colors