Database Develop

Headphones extension cord

I've been thinking about this for some time as I have some nice headphones (HeadDirect RE0) that I use with my Defy. But I miss having a microphone (taking/making calls without too much hassle). So I thought of cutting off the headphones of a Nokia stereo headset and putting a 3.5 plug so that I can have an extension cord with microphone.
I searched around the net but didn't find a good pinout so I opened the Nokias. They only have a 470ohm resistor (if I remember well). I tried to rewire those (to get a button push) with no success.
So I opened the original Motorola headset (quite easy and with no damage) to find quite a circuit inside. I'm putting the a picture of the circuit here, maybe someone with more experience can help me. The circuit is quite small and as I have minimum experience with circuits...
PS: I was thinking of getting a third party headset, but at about 10 euros... kinda expensive to break.

Heh, this is how i modded my headphones - got Creative EP-630 headphones, but no microphone, and sucking (compared to senn) motorola ones.... ...and voila!
Take pilot/microphone apart --> solder out old connections --> cut new headphones cord somewhere like 20 cm from headphone -->solder them in to original connection points.
EDIT:
Ohhh... and the worst part was to carefully remove original rubber gasket around original cables which were to be removed, and pulling/glueing new cabling through it. But the effect is awesome - there is almost no visual hint that someone modded them
..and sound quality....

I was thinking that I could get away with it without taking apart the original headset, but it looks like I'm slowly getting there...
Thanks for your reply!

I have a sony headset with mic, but they have the old sony ericsson socket. Could it be possible to solder a 3.5 jack onto them. Are the even selling 3.5 jacks with 4 rings?

I don't know if you could find a 4-rings 3.5 jack? Check the closest electronic parts shop. Or, if you have a Nokia headset lying around like I had...
From what I've found out the mic and headphones work OK just connected to the respective rings*, but what I couldn't make work is the button. As you can see in the attached picture, there are a few SMD capacitors.
*if I remember well, from tip: Left, Right, Mic, Ground (Corrected: Left, Right, Ground, Mic!!!)
Cheers!

NO.
There is right:
Left, Right, Ground, Mic
This is my modification:

[Q] Audio jack not working

My 3.5 mm audio output has been having increasing problems and it won't recognize most jacks anymore, including my earphones. Do you know of any trick to make it work, or would I need to replace the part completely to have it working again?

I think it depends on the kind of issue you see.
Example:
My audio jack was not working when I received my used Droid 4 from the USA.
I realized that my headphones are not deep enough in the phone. When I push them in a bit more they worked properly, but hey flip out as soon I touch the cable or I move.
1. Look if the Headphone jack is dirty and clean it up: h**ps://motorola-global-portal.custhelp.com/app/answers/prod_answer_detail/a_id/85247/p/30,6720,8096/c/8149,8172
2. If its cleaned and still not working its probably a hardware issue. ( Now you need to find whats broken / not working )
- A weak point is that the feeds of headphone jack are only pushed against the mainboard. I can imagine that carrying the phone in the pocket will bend that feeds. Meaning if you try to use the headphone jack outside of the pocket it will not work properly. You can try to push from the outside of the headphone jack to see if they work then properly. If yes... you need to disassembly the phone... and bend the feeds of the headphone jack back so that they get contact with the mb again.
- In my case after cleaning the headphone jack, the plug still didn't fit into the jack properly. I didn't want to open the Phone since ifixit says its a mess. So I tried to fix it without replacing it. I pushed a pice of toothpick into it to widen the deepest part of the jack. That fixed my Headphone jack. But the risk is there that you completely mess up the jack and you have to replace it completely.
Try at your own risk!

It is VERY easy for lint, dust, and grime to get stuck in the audio input socket. It's happened to my phone several times, since the audio jack isn't covered by any sort of cap. If you turn the phone off, shine a light into the socket, and (gently) dig around with a safety pin, you should be able to get most of the gunk out. It'd surprise you, how much lint can get stuck in there!
If you can find something to cover the audio input socket with, even better.

It was just dirty after all - I had like 3 mm worth of lint inside
I was worried it's some HW issue because different jacks responded differently... Glad it's not I use BT HF most of the time (with 3,5 jack output for headphones), but sometimes I like to plug the phone into my speakers, plus BT isn't that comfy for watching video...
Pipe cleaner wasn't very helpful, but a pin did the trick
Thanks for your help, guys!

Fixing the crap microphone issue on a single Din unit

I've spent hours reading the various threads since getting my HU last Novemeber. Absolutely love it, especially with the Malaysk roms on, does everything I could want it to, except make a bloody phone call. If the other end can hear me it's very faint at best.
Mine was supplied by Pumpkin, they have tried to help with a microphone app and various settings, none made the slightest difference.
There were a few posts about adding an external mic by finding the BT card after dissasembly and wiring to the mic+ and Sgnd legs on the card. Last night I eventually bit the bullet and took mine completely to piecese. Unfortunately I couldn't find a BT card, maybe it's built in, or on chip or...... But I gave up looking for it. What I did find on the front panel was the original pathetic little mic, way back from the tiny hole. You can't drill it bigger as it knocks the mic out of place.
My fix, made simpler now I know what I'm doing (it took me a lot longer and many more steps.
Take off main case
Pull tape off DVD drive to extend ribbon cable
Flip up black tab at the back of the ribbon cable connection on the screen and slide out ribbon and put screen aside
Remove two small screws from the side of the faceplate and using a flat blade screwdriver release the faceplate
Flip up tabs on both ribbon connectors and remove ribbons, I found it easier doing the short one first
unscrew all circuit boards screws in the faceplate circuit (7) and remove faceplate
Drill a hole in the rear of the unit above the ISO connector to feed a cable through
Carefully desolder the horrible little mic from the right hand side of the circuit (labelled mic1) and clean the holes
Take a mini jack extension lead and cut off the male end - either a mono one or if stereo you want the wires for the top part and the middle part of the connector stripped and feed through the hole, I also put a very small tie wrap inside with the tag outside so I could hold the wire tight and not strain the solder - tightened after assembly
The positive (top part) goes on the inside connection. I soldered this to the top of the board
The ground goes to the other terminal - these are so close together that I soldered this on the underside to ensure no contact
Reassemble in reverse of above (making sure all faceplate buttons are in place (yes I forgot the eject and screen buttons)
Then connect any unpowered condenser Mic and all of a sudden fantastic vocie clarity, quite a phenomenal difference.
I used this mic from Amazon, https://www.amazon.co.uk/gp/product/B01F84YMZQ/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Happy for this to get merged into another thread, but I couldn't find one specifically about the mic problem with the single din unit.

Was there no factory fitted connection for an external mic? Mine does have one. Then it would be simple to just disconnect the internal mic right?

ACSlater said:
Was there no factory fitted connection for an external mic? Mine does have one. Then it would be simple to just disconnect the internal mic right?
Click to expand...
Click to collapse
No, no external mic connection on the single din units. Confirmed by Pumpkin. Bit of a silly oversight

[HOWTO] [REPAIR] Spotty Headphone Jack or Random Google Assistant Activation Fix

If you've owned your Nexus for a while, you'll start to notice that your headphone jack may become spotty, finicky, or no longer work. This is caused by the lack of a proper connector on the motherboard for the headphone jack module. The pins of the headphone jack end up rubbing up against the PCB pads and wearing it away, resulting in a faulty connection. (See attachments for reference).
Symptoms of a worn connection:
- No sound through headphones
- Wiggling the headphone connector causes something to happen
- Google assistant or search activating randomly
- Songs randomly skipping or stopping when using aux or headphones
You can make a semi-permanent repair by tinning the connection pads with solder, which both improves the connection and repairs any wear. This may need to be repeated in the future as solder is a soft material. (not any time soon though, maybe a few months).
Tools:
- Soldering Iron
- Solder with rosin core (or solder + flux)
- About an hour
Step 1 - Follow any tear down guide to remove the main motherboard from the phone.
I prefer the iFixit guide which can be found here:
https://www.ifixit.com/Teardown/Nexus+5+Teardown/19016
You don't need to remove the battery, just the back cover, the protective shield, and unplug a few connectors.
Step 2 - Tin the connectors.
See attachments for the headphone connector, and reference images. (The images are taken with the motherboard flipped over)
If you've never touched a soldering iron before, make sure it's hot, and make sure to add a little flux to your target area. Flux removes oxidation, and makes the solder flow much much easier than without. Avoid hitting anything other than the soldering pads.
You don't need a lot, in fact, if you add too much, try to use the soldering iron tip to pull away the extra solder from the pads. I've attached a photo of a finished repair.
Step 3 - Reassembly.
Just put it back together the way you took it apart.

Is the microphone located on the USB charging board?

I think I damaged my mic trying to clean it with an old tooth brush and some alcohol, I recorded some voice notes to test it an it sounds crackly, buzzy and barely picks up my voice. Now I'm looking for a replacement and don't know if the microphone is located on the USB charging board or should I replace the speaker. The speaker works fine, but I don't kwon where the mic is located.
I would be grateful if someone could tell me