[SOLVED] Fixing stereo headphones - right speaker not producing sound

[yonyz]

I don't find it not-normal, I just didn't know about it.
I'll try that floating connection, but I remember with 100% certainty, when I first opened these headphones, there was no such thing as a floating connection.
Also, the red and green wires are both connected to the plug properly, I checked that too with the multimeter.
In fact, there's a connection all the way from the plug's ring (the right channel) to the right speaker. Must be a short I guess, so I'll also try switching red and green.

Edit:
Just letting you know, when I take a solder-clean speaker, the working one of the old pair, and check with the multimeter the points where the green and black are connected, there's already a connection, without anything soldered to the speaker. And when I "rub" the probes on those points, the speaker makes noise (like white noise), so I think it has nothing to do with the wires themselves, the speakers themselves are already made like that so those pads are connected.

Edit 2:
Tried floating connection, no sound from both speakers.

Now trying the switch between red and green.

 

[alexan_e]

You are the only one that can measure the pads , if the pad that the green wire is connected (with the black stuff in the middle ) is not one piece but split in half and each side goes in one connection of the speaker then there is no short.
The speaker will have a low resistance , say 32 ohm so if you describe this as a short than it is not, it is just the coil resistance.
Your scratch sound seem to verify that the two slices of that pad are not shorted, in that case the connection shown in the first picture would be correct.

 

[Genovator]

@alexan_e

if the pad that the green wire is connected (with the black stuff in the middle ) is not one piece but split in half and each side goes in one connection of the speaker then there is no short.

Yes. That is splited into half. I have repaired some speakers like this. Against that "black stuff" you can see square pads are there. The coil ends are connected there. (I guess).

@yonyz
In simple, you can consider your sound source(cd player, ipod, etc.) as the amplifier.
Can you upload images of both the speaker's pcb sides?? Just need to verify something...

 

[yonyz]

Switched between red and green, still sound from left speaker only, which makes perfect sense, all I did was feed the left speaker the right channel signal...

I can try to get some pictures, but it's really messy...

 

[yonyz]

So, left speaker, after switching between red and green wires (so now the stereo signal is inverted, but in my opinion it shouldn't affect whether or not the right speaker works):
https://i47.tinypic.com/2crwz0l.jpg

Right speaker:
https://i50.tinypic.com/24dh93m.jpg

It looks especially messy on the left speaker image, but the solder of one pad does not touch that of another. I double checked that with a multimeter.

 

[FvM]

You would wan't to add the missing link

 

[Genovator]

There you are.... You connected the red wire of right speaker in the middle pad (carrier line). I told you earlier, it is a carrier line. It has no work with the speaker.



Connect it as shown in the image.

 

[yonyz]

The area where the bronze (yellow, copper, whatever) wire is, it's the same area where you pointed the yellow arrow. It's a long pad... However, I'm gonna change the red wire as in your picture.

Update: IT'S WORKING! I just got to switch back the red and green cause the stereo is inverted atm.

Thanks a lot everyone.

 

[Genovator]

Fewww.... At last.....
Congratulations.....

Now mark this thread as SOLVED.

 

[yonyz]

Well bad news. I did the switch but the left speaker isn't working. I'm touching both its ends of the coil, scratching, no white noise at all. There's continuity between the ends, but no sound is produced.

 

[Genovator]

From your last post, I think you have not done what I told you to do.... Connect the red wire were I mentioned....

 

[yonyz]

I did that, and you were talking about the right speaker.
What I said in my last message is that the LEFT speaker isn't working now, which is all new. The right is working.
Here's the right speaker:
https://i48.tinypic.com/11109eb.jpg

 

[Genovator]

Keep your left speaker's soldering configurations as same as it was before. All wires in its initial place. Just make a change in the right speaker.....=> Desolder the red wire and place it where I mentioned in my image.

Try it and see it works or not....

 

[yonyz]

I completely unsoldered the left speaker. I'll resolder as it is here (which is also how I had it soldered):
https://i48.tinypic.com/2nty4j4.jpg

 

[Genovator]

Yes, do it as below.....

LEFT SPEAKER:




RIGHT SPEAKER:

 

[yonyz]

Yeah that's how they're soldered, but no sound from left speaker.
Something I noticed though, is that on the left speaker, all the pads are connected to each other. I know that's normal with the two ends of the coil, but the middle pad, the carrier as you call it, is also connected to both coil ends. This is only true when all the wires are soldered on the left speaker. If nothing is soldered the "problem" is gone.

Meanwhile I'm gonna try to solder one of my old speakers, the one that still works. Maybe the new left speaker died in the long process...

Update:
Switched back to old left speaker, now both speakers work. Maybe the new one died despite the working connection between both coil ends?

 

[Genovator]

but the middle pad, the carrier as you call it, is also connected to both coil ends.

Carrier is not exactly connected with the coils directly. It is through right speaker's coil. (That's a long story)
The red wire in the carrier is the audio line for the right speaker. Green wire gives sound to left piece, red wire gives sound to right piece. Black is common ground.

Now forget about left speaker.
In the right speaker, there are only two wires to be connected - Red and yellow. Red is audio line, yellow is ground.
=> Connect red in right speaker exactly were green was connected in left speaker. See the right speaker diagram in post #35.


Have you tried this?????????

 

[yonyz]

Yeah that's how I did it. It now works with the old speaker. Guess new one is dead.

 

[Genovator]

Does both left - right works????

Your speakers are prone to be dead b'cause as I seen in the images, you burnt them while soldering.... :-|

 

[yonyz]

Yeah both sides work.
I did burn the plastic cover, not the actual speaker... Or maybe I did damage the left speaker somehow I guess... It was some aggressive soldering I guess.
Oh well, I closed them (minus one lost screw), put them on and am now enjoying some good Infected Mushroom music.

Thanks again everyone, and especially you Genovator, for the final, most important revelation.