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Fixing a female TRS connector on phone

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michael09

New Member
Hi everyone This is my Dubao N868 PDA knockoff clone or whatever.

I broke the 2.5mm female TRS connector and now plan to solder on a 3.5mm female TRS instead so I don't have to use an adaptor for my headphones anymore. Heres what I want the finished product to look like.sort of...

8889-IMG_0839.jpg


Heres the female TRS I bought
8890-IMG_0844.jpg


and heres whats confusing me.
8891-IMG_0843.jpg


I've searched google quite a bit but can't work this out! Any help much appreciated. thanks in advance!
 

michael09

New Member
I know how to read basic schematics but this is making my head hurt. Is there somewhere where I can learn to read this type of diagram?
 
Well, look at the diagram. See where the pins are numbered 1-5? This would be the side touching the PCB. So (your) 5 would be pin 1, (your) 2 would be pin 2, etc. Then, using the diagram underneath "Stereo Schematic" match up the pins to the adapter you have. If it works, youre done! If it doesnt, the layout isnt correct (I just picked any SMD jack I could find), and you will need to find another diagram, or try to follow traces
 

michael09

New Member
ok Ive figured out which pins are which I think
8896-dots.gif


but why would the 6th pin not be connected to anything?
and now I'm lost with this and how it connects to the TRS
8897-dots2.gif
 
Its possible that the connector you have has a different pinout or more/less pins. There are many reasons that the pins may not line up - Im not saying the diagram is exact or even right, its just a starting place.

So you would connect the shield (the biggest part of the plug) to pin 1, the ring to pin 2, and the tip to pin 5.

8902-800px-Jack_plug.png


1 - shield
2 - ring
3 - tip
 

michael09

New Member
Ah ok so that diagram may not match. I Thought there would of been some kind of universal configuration. I'll give this diagram ago and then hunt around for some others. Thanks!
 

michael09

New Member
I don't think that diagram quite matches up. with a multimeter set to continuity could I manually find out which pins = what channel?

8907-dots.gif


pin 3 seems to have to continuity to other pins while all other pins are interconnected.
I've managed to get my headphones working in mono sound by attaching pin 3 (the one I suspect is earth) to the sheild of the TRS and by connecting any other pin to the ring AND tip.
8908-mono.jpg


Am I making any sense or just gibberish?
 
Where is the shield connected to? If you dont have it connected, remove either the ring or tip wire, and try connecting the shield wire to every pin until you get mono from one side. Then, reconnect the other wire and move it around until you get stereo sound. Havent tested it but it seems like that would work.
 

michael09

New Member
ok I'm finished
8911-IMG_0839.jpg

It looks almost exactly as I planned BUT the loud speaker and small speaker now don't work. There connected up perfectly right. I think it all ties in with the jack and those extra pins. I decided to just go MONO. theres not enough room for the extra wires I'de need to go stereo and still close the phones casing.

without the speakers it doesnt function as a phone BUT its still damn good to play movies on, surf the net, emulate gameboy etc. just need to use headphones . THANKS parkinglotlust!
 
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