Develop Bugs

XDA2 2,5'' jack PINout !

I didn't find here the pinout description of 2,5mm jack connector from XDA2.
There is stereo out, microphone in and two buttons.
I tried to buy 2,5mm connector, but it is not usable - connector itself fits to the XDA2, but the connector's body is too thick so the connector can not be fully plugged in.
So i bought some Nokia portable handsfree, which is also equipped with 2,5mm jack with four pins. So all i need is to know, how it should be connected.
I also bought a small plastic box, two 3,5mm stereo females and two little buttons. All of those things will be installed into that tiny box (plus the Nokia 2,5mm male connector). So this will work as an universal adaptor: from XDA2 to anything. I already bought big HiFi earphones with built-in microphone - it has two male 3,5mm jacks - one for stereosound, second for the microphone - so I'll be able to connect it to the XDA2 using my homemade tiny box and HiFi telephoning will become the reality ;-))
I'd also like to make a "homemade" simple car handsfree : I'll connect XDA's audio out to AudioIn on my car audio (also suitable for playing MP3 from XDA on car audio system). And I'll connect a standalone external microphone to XDA, microphone will be placed somewhere in the cabine.
Does it sound insane? Or realistic? Does anybody know the XDA2 jack pinout?

http://xda-developers.com/connectors/
this is xda1 but they are suppose to be able to use the same headphones
so it would help a bit
even though the xda1 dont support the 2 button thingy

Hey, as I trashed my cable I had to find out a little bit about the connecter
I write this from memory, so please handle with care ;-) :
from top to bottom
top ring - stereo out (left or right)
next ring - stereo out (right or left)
next - microphone in
next - ground
metallic ring in the inside of the connector - phone switch
By the way.. these pins are protect versus each other.. you'll have some tries..
Alex

The truth is that I can use the system connector instead of the 2,5mm jack.
AudioOut and MicrophoneIn pins are on the system connector as well...
So meybe I'll make SystemConnector-to-3,5mmJack adaptor ;-)
Or is there a difference?

Ehm..I had simply buyed a 2,5 to 3,5 Jack and cut a piece of it to fit into phone:

unapproachable2kx said:
Ehm..I had simply buyed a 2,5 to 3,5 Jack and cut a piece of it to fit into phone:
Click to expand...
Click to collapse
Well, OK. But it is only a stereo out, you don't have a microphone in. I'd like both of them plus those two buttons (red and green phone button)...

http://pc-mobile.net/pxdaa.htm
this one have the mic but dont support the pickup and slam down of the phone
So meybe I'll make SystemConnector-to-3,5mmJack adaptor
Or is there a difference?
Click to expand...
Click to collapse
well if you wanted to connect something else to the sysconnector you would not be able to connect something like charger or GPS
then imho it would make more sence using the 2.5 connection which cant be used for anything but sound anyway

Well, I am looking for such a device, but then one that will work with the XDA2/MDA2
Because I would like to use my own B&O headset, but would like to keep the phone function with microphone and answer buttons
So if somebody would like to spend an hour on the web for a detailed surch :wink:

make it your self...
takes less than 30 minutes (if you know how to use a solder iron)
I did it and I am trulty happy with it.
Alex

but is it not a problem that the lengh of the 3.5mm headset get added to the length of the wire from the device to the buttons and mic
i mean the mic need to be able to reach ones mough but the lenght from ones mouth to ones ears are not that long and with the added 3.5 mm headset lenght it would seme to become a wire mess?

Yes and No...
Yes if you do nothing.
No if you wrap it up a little.

well if you wrap the wire you will create a coil line effect
and that damage audio quality
just kidding i'm not a real audiophile

It seems that info in xda-developers.com/connectors/ is aplicable to XDA I.
XDAII headset has 2 buttons, answer and finish.
I'm specially interested in the 22pin pinout, that I've told IS DIFFERENT from the XDA I.
Can anybody point me with updated info on XDA II conneectors?
Thanks

vcp
xant give the wiring of the 2.5mm on the xda2 in this thread
about the 22pin connector then
http://forum.xda-developers.com/viewtopic.php?t=3929&highlight=22pin+pinout

Xant said:
from top to bottom
top ring - stereo out (left or right)
next ring - stereo out (right or left)
next - microphone in
next - ground
metallic ring in the inside of the connector - phone switch
Alex
Click to expand...
Click to collapse
Alex,
This is correct. The XDA II uses 5 pins instead of four. The switches are both connected to the 5th ring on the inside.
Until now, I wasn't able to find this connector.
Seems it's only used on the XDA II.
The diagram of the XDA I connector is correct, only the button isn't connected over the microphone to ground. So if you only need audio and mike, use that schematic.
Grtz,
Jos

adapter for sound *in*?

Hi all!
For sound out, there are adapters (I already have one), which convert from that custom 2.5" jack to a standard 3.5" - which even let the built in microphone active. OK.
But is there any adapter for the opposite? Converting the microphone / sound in part of that custom 2.5" to an e.g. 3.5" - so that some standard microphone or some other sound pickup could be attached?
Wether built in speaker would be left active or not isn't relevant for me.
Background: I have one of those programs for tuning musical instruments. It works fine with the built in mic in relatively silent rooms and for acoustic instruments. But imagine beeing on stage between two songs while the crowd is cheering!
If no such accessory is available: I would spend some extra Euros for a second hands free thing, cut off the side with the 2.5" plug and tinker a 3.5" on the open end.
But will this work - or have I to include some resistors or such?
Thanks, greetings
Manfred

There are such adapter on sales
http://www.expansys.com/product.asp?code=113967&tab=0
As for the issue of resister, I don't think you will be needing any. I've no experience on electric musical instruments, but a microphone is a essentially an active resistor/capacitor that convert sounds to resistance/capacitance-variation and hence electric signals. It does not produce any form of voltage itself (eg. you do not need battery for microphone).
Hence, it depends on your musical instruments. If you were to get the adaptor above, perform a voltage test on all 6 combinations (of the 3 contacts) to make sure your instruments does not produce any form of voltage/current. If it does not produce any form of voltage, you ought to be safe for a direct plug-in.

(oops, did I mix up " with mm in my initial post )
Are you using this adaptor yourself? With a Prophet? Does it work?
Not to appear nagging, but there are three facts that make me doubt:
- the description there tells me, that it "converts the standard 2.5mm three conductor jack"
- which can also be seen on the "larger image" (those pictures at expansys often are near causing eye cancer >;-) ), where the plug has *three* contacts
- description also tells us, the adaptor converts to a "3.5mm Mono Headphone Jack".
Well, the jack of Prophet has *four* contacts, and sound out comes in *stereo*. I guess that: tip and first ring are - stereo - out; 2nd ring is mic in; last "ring" obviously is ground. This I take from the fact, that my adaptor for standard 2.5mm to standard 3.5mm stereo earphones really delivers stereo out, but the internal mic is still working.
So I also guess, that this adaptor here has e.g. *mono* out on tip, mic in on 1st ring - and ground on third and last ring - which also would lead to connecting Prophet's mic to ground.
Or am I totally wrong here?
The question about resistors (and such) comes from looking at
http://wiki.xda-developers.com/index.php?pagename=Connectors
(but that's Wallaby and Himalaya wiring, and with the latter there's also an extra (5th!) "outer sleeve" connector); but you can see in the drawing there, that there are a diode and three capacitors between mic and ground, and serially a resistor (but all without values).
So I fear, that just connecting a (passive) guitar pickup won't deliver satisfying results.

Hmm. didn't notice that one is a mono output. Anyway, can't really find one with mic and headphone out for streo (actually, gave up searching). I guess there aren't enough market for people pluging in their own mic.
As for the diagram, it looks like that, for the micrphone, the circular wiring thing is an inductor, not a resistor, since it is marked as L1. From what it seems, it looks like those capacitors and inductor is there to bias the circuit such that the mic is to be in the right impedance to pickup speech. That is more to "adjust" the mic such that it will gives the correct values (probably due to its small size?). So, if you were to plugin in your instruments directly, the result may not be that good. But probably it will. You may need to tune your software to adjust for this?
As for the z-diode there, it is a mystery to me. Can't think of anything useful for it, except to ensure the mic-in is always >= 0 (greater or equals to zero).

Well, first of all: thanks a lot for your answers!!
I also gave up searching before posting here; also searched for a separate 4-ring 2.5mm plug; but before investing in a second headset just to get that plug, I thought I'd ask here ...
Inductors, resistors et all ... it's been way too long since my physics intensive course on grammar school ...
Your thoughts sound logical.
So I'll get me the headset for the plug and tinker an adaptor myself - without any extra inductors or capacitors. Will see how it works - if not, well, I'll come back here again to ask for the values of them ... and tinker along ;-)

I build an adapter on my own out of the standard hands free headphone which was included in delivery.Unfortuately I had to destroy the case a bit I just made a kabel with a 3,5 mm jack and soldered it on the circuit board and bridged the build in mikrophone.Now I am able to connect a stand alone microphone to my Prophet.
Cheers

you can order one @ http://mobile.brando.com.hk/

@ Repose: you mean the handsfree headphone? I already ordered one at expansys
@ colida: that's another idea, keeping the circuit board. Such, all capacitors etc. are in place ... maybe just looks a bit ugly, you really have to break that little housing.

Fix Sennheiser HD205

I was handed down a pair of Sennheiser HD205 headphones. I had used them a few times before and they sound awesome! However, since I got them they make my music sound weird. For example, sometimes it turns every song into an instrumental version or it is really soft and will get really loud if you jiggle the cord right.
I cut off the jack and found 4 wires inside. 2 copper wires, 1 copper wire painted blue and another copper wire painted red. I removed the paint using acetone nail polish remover and fine sandpaper. Now that I have the exposed wires, I connected them in a new 3.5mm jack from radio shack. I think the colored wires are + and the unpainted copper wires are -. Note these wires are actually bunches of wires with tiny radiuses.
Sadly, when I connect the wires in I still have the distortion problems. It mostly has to do with losing the vocals. If I move the balance on my computer to all right or all left it will sound perfect. If I also connect the former red bundle to the ground of the 3.5mm and the former blue to either the L or R I can get mono.
I am thinking of cutting the wire higher and repeating the acetone procedure and rewiring again. Will that work because I don't want to keep cutting and cutting and eventually cut the whole wire to small pieces!
Your help is greatly needed and most appreciated. I really think these headphones will complement the voodoo sound on my I9000 nicely

187 views and nobody has any idea?? or needs more information for a fix recommendation??

Balancing audio?
I know this is probably a bit late. But i had a similar problem. My Sennheiser HD205 Headphones Started acting weird. They have an excellent sound of them and are really comfortable for someone like me who would wear them for a long period of time. Recently I had to get the cable fixed that went into the actual headphones because if they moved ever so slighty all sound was gone. I got them fixed and then the sound went weird the next day, when ever I played a song with a heavy bass, once the bass part came on the whole song was muted until it stopped and the vocals were distorted, then I was playing around with the sound settings on my computer and i noticed the audio balance was a bit off then usual (Left=78 and Right=78) so I brought them back down to 50:50 and it was all better . I thought maybe you should try that, seeing as nobody else left a suggestion! (If you dont know where to find the sound setting on your comp, go to: Control Panel>Hardware and Sound>Sound, and a window should pop up. right click on the speaker output you use (its called Speaker by default) and click properties then click on the tab properties and balance it to 50% on both sides) NOTE: Make shure your not playing any music (eg. Itunes) while your doing this. it MAY stop the program from working! Good Luck!

AAccount said:
I was handed down a pair of Sennheiser HD205 headphones. I had used them a few times before and they sound awesome! However, since I got them they make my music sound weird. For example, sometimes it turns every song into an instrumental version or it is really soft and will get really loud if you jiggle the cord right.
I cut off the jack and found 4 wires inside. 2 copper wires, 1 copper wire painted blue and another copper wire painted red. I removed the paint using acetone nail polish remover and fine sandpaper. Now that I have the exposed wires, I connected them in a new 3.5mm jack from radio shack. I think the colored wires are + and the unpainted copper wires are -. Note these wires are actually bunches of wires with tiny radiuses.
Sadly, when I connect the wires in I still have the distortion problems. It mostly has to do with losing the vocals. If I move the balance on my computer to all right or all left it will sound perfect. If I also connect the former red bundle to the ground of the 3.5mm and the former blue to either the L or R I can get mono.
I am thinking of cutting the wire higher and repeating the acetone procedure and rewiring again. Will that work because I don't want to keep cutting and cutting and eventually cut the whole wire to small pieces!
Your help is greatly needed and most appreciated. I really think these headphones will complement the voodoo sound on my I9000 nicely
Click to expand...
Click to collapse
Hello,
I had the same problem. Unlike most headphones, the Sennheiser HD205 uses two separate ground wires, these are the two uncolored wires. The red one is for the right (the pin that's closer to the middle) the blue one is for the left (the pin that's further from the middle). The colorless wires both go to the ground pin.
I connected them this way, now I don't have any distortion, and I can hear the vocals loud and clear on both sides.

Sounds like you don't have ground connected to the signal source (jack).
If the jack has 3 connectors (tip + 2 sleeves) the wires go like this: tip - blue, first sleeve - red, second sleeve (furthest from the tip) - ground (usually golden).
Try an connect the two sides separately and check if they work individually. Only then connect them both. If the cable doesn't have any shor circuits it should work just fine.
Good luck!

[Q] Nexus 7 - Very Flaky Headphone Jack

For the past few months, the headphone jack has gotten more and more flaky, to the point that I have to press down on the jack to receive sound. Does anyone know of a DIY fix? Its not the headphones themselves, as it has this problem with every pair I've tried.

jlanik4 said:
For the past few months, the headphone jack has gotten more and more flaky, to the point that I have to press down on the jack to receive sound. Does anyone know of a DIY fix? Its not the headphones themselves, as it has this problem with every pair I've tried.
Click to expand...
Click to collapse
I've had it happen with another Asus model. The solder cracked and the tiny traces broke, resulting in bad connections. What you can do is check continuity between the jack and the circuit. Tedious work, but if you're game, you need a 3.5 mm jack with exposed wires. Trace those wires to the connecting points on the motherboard.
If everything is good, then 2 possibilities: (1) the connecting points inside the female jack (soldered to the motherboard) are worn, causing intermittent contact, in which case you need to replace it. If you can't find one, let me know.
(2) If the problem persists, but varies depending on how much pressure you put on the headphones jack, then maybe it's just dirty. Best is to use high-grade alcohol (91% or more) and clean the inside with a q-tip with less cotton; plus use a toothpick with double-sided tape at one end and swirl inside the female jack to remove impurities and dirt. Good luck.

graphdarnell said:
I've had it happen with another Asus model. The solder cracked and the tiny traces broke, resulting in bad connections. What you can do is check continuity between the jack and the circuit. Tedious work, but if you're game, you need a 3.5 mm jack with exposed wires. Trace those wires to the connecting points on the motherboard.
If everything is good, then 2 possibilities: (1) the connecting points inside the female jack (soldered to the motherboard) are worn, causing intermittent contact, in which case you need to replace it. If you can't find one, let me know.
(2) If the problem persists, but varies depending on how much pressure you put on the headphones jack, then maybe it's just dirty. Best is to use high-grade alcohol (91% or more) and clean the inside with a q-tip with less cotton; plus use a toothpick with double-sided tape at one end and swirl inside the female jack to remove impurities and dirt. Good luck.
Click to expand...
Click to collapse
Thanks. I had a feeling it might just be dirty, but I wanted to know if anyone had any alternative solutions if that didn't work.

Speaker issue after screen replacement

Hello, I have replaced the screen and housing on my LG Nexus 5x which went OK.
However, I now have no audio from the loud speaker under certain situations. I have replaced the earpiece (I now don't think this was anything to do with it) and headphone jack to no avail but have narrowed it down to the lower back plate (the bit you screw in over the headphone jack). Sounds through the headphones work correctly BTW.
When the back is pressed on very lightly the speaker works. (so the pogo pins connect to the cover/speaker). However, when you click the plastic on speaker cuts out. My guess is something gets pushed in too far so something either loses contact or makes contact that shouldn't.
Any thoughts/ideas most welcome. I've made a little video to illustrate what I mean: drive.google dot com /file/d/1CU37Fvrq2NfL6WKNS0sn0ssw_3s-BWx1/view

same here after battery replacement
Although i have purchased a new speaker still no sound out of it.
pressing the back did not work on either part.
any suggestions?
AshSplash said:
Hello, I have replaced the screen and housing on my LG Nexus 5x which went OK.
However, I now have no audio from the loud speaker under certain situations. I have replaced the earpiece (I now don't think this was anything to do with it) and headphone jack to no avail but have narrowed it down to the lower back plate (the bit you screw in over the headphone jack). Sounds through the headphones work correctly BTW.
When the back is pressed on very lightly the speaker works. (so the pogo pins connect to the cover/speaker). However, when you click the plastic on speaker cuts out. My guess is something gets pushed in too far so something either loses contact or makes contact that shouldn't.
Any thoughts/ideas most welcome. I've made a little video to illustrate what I mean: drive.google dot com /file/d/1CU37Fvrq2NfL6WKNS0sn0ssw_3s-BWx1/view
Click to expand...
Click to collapse