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Audio equipment

Integrated audio stk 4231 II

Pablomiranda12345
hace 5 años
hace 5 años
Hello how are you. I would like to know if someone can tell me if I could get the audio input and that of the speakers to this amplifier I found a stereo and I took out the amplifier board I also have the transformer. That's why I wanted to know if you can or should change something on the board. Thanks in case anyone can tell me please
Alexis Navarro
hace 5 años

The branch of white wires dotted with pink and that are on the opposite side of the large filters this is the one that goes to the transformer, this plug must match one of the sockets that is in the section of the transformer this is the voltage that feeds the integrated amplifier, and the small yellow plug that is on the card next to the transformer is the ac voltage input is where the cable that connects to the outlet that goes on the walls goes, you just have to decipher the white resistors for the outputs to speakers and through the plane that you send see which are

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Alexis Navarro
hace 5 años

the signal inputs that are very sure to reach the black plug on the edge of the card and that it will be easy to find if you are guided with the plane that you send there that you have to add a stereo volume control as of 100K or 150K to this input so when you apply a signal it does not go off to its maximum, with the control you regulate the volume level and avoid damage to speakers the protection fuses the transformer card and should bring them, good luck friend in your project, remember to comment your results

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Pablomiranda12345
hace 5 años

Hi, thanks just from your message. But where I put the potentiometer to regulate the volume.
Then the outputs are the black plastic connector that is still on the side of the large capacitors.
If the fuse is brought, the transformer.
Oh, I forgot, I see that where the speakers go, it has reels, I think they tell them about the air. But you don't have them on the amplifier card, it doesn't matter or what do I do?
Sorry if my questions are very silly but then I had to ask them.
Well thank you very much in case you could answer my questions, I would appreciate it very much see you later

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Alexis Navarro
hace 5 años

Cordial greeting, hello, no friend do not worry, there is not a silly question, to be sure, that's why it is usually said "Sure I kill trust" hehehehe b

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Alexis Navarro
hace 5 años

Well with respect to the coils there is no problem, you can connect directly to a suitable connector for the speakers, you must be sure friend after you follow the respective tracks of the outputs, remember to tell you that they are from the white square resistors, after If you place the signal input terminals, you must connect them through shielded cables for the right and left channel respectively through the potentiometer that I mention either 100 or 150K at the other ends are the female RCA connectors that would be the inputs of signal,

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Pablomiranda12345
hace 5 años

Hi. Alexis again, I was reviewing pin 12 and 15 which are the speakers but in the black plastic connector gives me continuity the four pins of the black two in pin 12 and two in pin 15. It is to connect two speakers per entry or how?
I found it difficult to follow the tracks but I checked them directly from pin 12 and 15 with the multimeter in continuity, it is ok to do so or I keep trying to follow the tracks
I'm just going to check the other pins on 3 and 20 to connect right and left
When I finish I send you a message again, for anything else that happens to me friend.

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Pablomiranda12345
hace 5 años

And I also wanted to know how many omhs whats the speakers that it bears should be, I hope it is not very fitting on my part so much question, friend many, thank you very much for all your help!

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Alexis Navarro
hace 5 años

Hello, friend so you do not get too tangled, keep in mind what I mentioned regarding the white square resistors, which say they are 0.22ohm those resistors are from the audio outputs, take the opposite pin that connects with the integrated that is to say, of the resistance and follow it to see in which terminal of the black connector it arrives, there you can connect the positive terminals of the left and right audio outputs and the earth that would be negative of both sides left. and right and there the speakers are connected, after that you can locate the signal inputs.

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Alexis Navarro
hace 5 años

Hello again, friend, do not worry here we are always to collaborate in what we can, because in what you ask, the diagram says that it is 100 wats per channel, so I would recommend some speakers from 12 "to 8 ohms to about 150 wats with mouth or coil of 2 "1/2 or up to 3" of mouth so that t reproduces several medium-low frequencies and take better advantage of your audio project, depending on where you are you can either build your own speakers or order them already armed as a full range or in Spanish, any range for you to perform more with the specifications of the speaker that you gave

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Pablomiranda12345
hace 5 años

Hello again friend, I already had the horn inputs but the thing is that I can't find the ones where I want to put the jack I already know that those audio inputs are on pin 3 and 20 of stk but I can't find the tracks on pin 1 and 2 they have no connection the 3 that is an entry has only one point, I do not see the clue in the image you sent me it has a capacitor of 2.2 uf but the card does not carry only carries 47 uf 100 uf and another but none of 2.2 uf. What can I do friend give me a tip to find the clues please. Thank you so much for help me

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Pablomiranda12345
hace 5 años

Hooooola friend that I tell you I think I already found the clues as you said let me tell you to see if I did it well or I return
15 and 20 is where the square white resistors are followed, just as you told me the opposite leg to the integrated one comes out to a bridge and from there directly to the black plastic connector, the two are the same.
And the audio input cost me a little more but it goes through a condenser I think of 10 microfarads and three resistors ďe there goes the track that goes to the black plastic connector. The two entries are the same.
I only have one doubt and it is if this integrated feeds.

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Alexis Navarro
hace 5 años
hace 5 años
Cordial greeting, friend, here is a small map that may be useful as a guide, so that you can make your connections correctly. I hope to be helpful
Pablomiranda12345
hace 5 años

Hi Alexis Navarro, I have the armed amplifier but I just wanted to know if I can use it as it is armed. The amplifier was a stereo stereo I think is the only thing that was the only thing I could recycle before they threw it away.
In the image you sent me I follow the clues but I get lost.
I don't know if you can help me I have a transformer and the amplifier just sent you an image for you to see. Thanks for your time

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Alexis Navarro
hace 5 años

Cordial greeting, friend is easy, you just have to take as a guide the image that you send and guide you through the numbers indicated by each pin, to make it easier on the card where the integrated amplifier is, the square white earthenware resistors are the audio outputs and the part of the large filters is the dual supply voltage that comes from the transformer part, follow the tracks of the white resistors so that you can connect the speakers you plan to put there, you can do the tracking that I recommend and comment. Regards

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Pablomiranda12345
hace 5 años

With positive current and negative positive current, then what is the earth.
Sorry if my question is nonsense, is that I do not know and well no way since, I asked.
That's it Alexis many, thank you very much for your help I hope you answer me, have a nice day

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Alexis Navarro
hace 5 años

Cordial greeting, friend Pablo the Earth is the middle point where two of the pins of the big black filters meet, verify that all black connector also arrives. Regards

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Pablomiranda12345
hace 5 años

Good morning Alexis. You know that it is already connected and if it works only it sounds very, very low in volume. What do you think it could be

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Alexis Navarro
hace 5 años

Good morning, friend Pablo, it can be for several reasons and one of them a bad connection soon, or you have misplaced the volume control, another possibility could be the electrolytic filters that the IC card carries in the signal inputs, check if you did not connect the signal input in an inverted way, that is to say the positive one, you have been able to place it in the negative one, this usually happens and it is reason for it to sound low, check the connections again and comment again as t was, if possible take pictures of How did you see what else I can help. Regards

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Omar Arboleda
hace 5 años
hace 5 años
good could you send me an image as the current of the transformer would be connected I have complete the stk4231 and suffuente were of a great sony
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