BA Electronic Circuit Hardware - mapping the pcb eletronics - MDA III, XDA III, PDA2k, 9090 Software Upgrading

Hi all,
As i started servicing all pdas for a couple of monthes (only as a hobby, i fix them for friends and relatives), i came across one BA that gave me some trouble.
i got it to replace its LCD that was broken as it was dropped and thats very simple to replace it, so far so good. now it has two main problems :
1. no sound from speaker (even when in speakerphone mode), but there is sound in the stereo earphones (i plugged to the connector by the sd card slot). - i can only assume that a bluetooth handsfree device it will also work.
2. although the backup battery is fully charged, if i remove the main battery even for a brief second, when turned on, the BA acts as if i made a hard reset.
as for solving the problems :
1. using a digital multimeter, i managed to track the conductivity from the internal speaker through its connector, flat ribbon to the connector which connects to the main pcb - so there is no contact problem from the speaker to the main pcb.
using the help from WIKI, i went to site that has the list of all components and their description - the IC that is responsible for audio amp is a MAXIM's MAX4410 which is a stereo headphone driver. a quick look at its charasteristics and typical configuration and i understood that (assuming this is the IC that drives the internal speaker) the speaker should have one pin which is ground and the other goes to the amplified signal from the IC. neither one of the pins showed it has GND to it. so maybe there is a bad GND line to the connector.
2. regarding the backup battery issue i do not know what makes this problem.
I am sharing this info with you all with two ideas in mind :
1. to resolve my problem and know those devices hardware better.
2. because i am quite a while watching xda-developers and WIKI and i got the feeling that a lot of eforth is given to the software side of all those pdas (which is greate!!! keep going, this work helps lots of people and it shows al thos mega corps they are not the only ones), but the hardware is a bit forgotten and left behind. let me tell you this, there are many VERY simple mini projects i made useing electronics (i am an electronics engineer in my profession) that made my life easy . i am now investigating those instruments hardware as i have several ideas to develope useful accessories to my pda (like an external IR transciver to control IR devices like TV,DVD and to communicate with my laptop, and some other ideas) and i believe we can do the same info sharing as done on software side but on the hardware side.
I will thank any ideas, thoghts or commentsabout this matter. Yol.

Related

mapping hardware for this device

Hi all,
As i started servicing all pdas for a couple of monthes (only as a hobby, i fix them for friends and relatives), i came across one BA that gave me some trouble.
i got it to replace its LCD that was broken as it was dropped and thats very simple to replace it, so far so good. now it has two main problems :
1. no sound from speaker (even when in speakerphone mode), but there is sound in the stereo earphones (i plugged to the connector by the sd card slot). - i can only assume that a bluetooth handsfree device it will also work.
2. although the backup battery is fully charged, if i remove the main battery even for a brief second, when turned on, the BA acts as if i made a hard reset.
as for solving the problems :
1. using a digital multimeter, i managed to track the conductivity from the internal speaker through its connector, flat ribbon to the connector which connects to the main pcb - so there is no contact problem from the speaker to the main pcb.
using the help from WIKI, i went to site that has the list of all components and their description - the IC that is responsible for audio amp is a MAXIM's MAX4410 which is a stereo headphone driver. a quick look at its charasteristics and typical configuration and i understood that (assuming this is the IC that drives the internal speaker) the speaker should have one pin which is ground and the other goes to the amplified signal from the IC. neither one of the pins showed it has GND to it. so maybe there is a bad GND line to the connector.
2. regarding the backup battery issue i do not know what makes this problem.
I am sharing this info with you all with two ideas in mind :
1. to resolve my problem and know those devices hardware better.
2. because i am quite a while watching xda-developers and WIKI and i got the feeling that a lot of eforth is given to the software side of all those pdas (which is greate!!! keep going, this work helps lots of people and it shows al thos mega corps they are not the only ones), but the hardware is a bit forgotten and left behind. let me tell you this, there are many VERY simple mini projects i made useing electronics (i am an electronics engineer in my profession) that made my life easy . i am now investigating those instruments hardware as i have several ideas to develope useful accessories to my pda (like an external IR transciver to control IR devices like TV,DVD and to communicate with my laptop, and some other ideas) and i believe we can do the same info sharing as done on software side but on the hardware side.
I will thank any ideas, thoghts or commentsabout this matter. Yol.

ExtUSB - How it knows that a headset is plugged in?

Hi,
I just bought an active Brodit Carholder with a 1-to-3 adapter, but I dont want to use (for now) the 3.5 mm connector for sound. The problem is, that my Diamond thinks that a Headset is connected, while plugged in, no matter if a headset is connected or not (3,5mm or ExtUSB). So I cant hear my Navigation Program...
Has anyone an idea how to "say" my Diamond to use its own speaker while plugged in (I'd prefer the Hardware-method, like connecting some contacts inside the 1-to-3 adapter).
Brodit Issue!!!
Same problem here!!! Can anybody help us out? So many smart people here, this problem should be an easy one (I would guess)
Thanks in advance!!!
I've the same Problem! Is there any answer?
go to registry
HKLM/System/State/Hardware/Headset
check its value when connected and when disconnected....
it must be "0".
Brodit Issue
Does this mean that I need to set it everytime when I put my Diamond in the Brodit car holder? There must be an easy way.......
But thanks anyway, let me try
Thanks, but I'd prefer a hardware method like cutting a cable/bridging two etc... so I don't have to set this registry value everytime i put my diamond into the carholder..
There must be an easy way thats right!
It don't work if i change the registry, when die headset is connected,
the value changes to 1 but when i change it to 0 nothing happens!!
Brodit problem
Has nobody got a solution for this problem? So many smart people up here...
PLEASE HELP
Thanks guys!!!
Hello, got also this problem i'm using the touch Pro, can anyone help me?
when my phone is in the Brobit carkit it thinks that my headset is connected.
So when I receive a call the sound of the conversation is over my car speakers, but there is nog mic.....
Anyone with a solution?
Any News on this?
Thanks!!
The only extUSB cable that worked well for me is the YC-A300 cable. It only sends out the sound if the headphones are plugged in, otherwise the sound comes from the Diamond speaker. It also enables the Diamond's built-in mic even if the headphones are connected.
No-one here can even be expected to help you with this problem. You were given the only solution available from the phone's end. So what makes you think that someone can give you a better answer. Most of the people here are phone modders, not accessory modders. And everything here has to do with SOFTWARE modding. You want hardware modding, & that isn't happening here. Besides yous guys are probably the only ones here that even have that holder. So you can try looking for a site that has forums developed around the holder that you have. Or, you can try to find a service manual on the holder & see if there is a schematical routing of the wires.
You shoud not have to bridge any of the wires though. It should just be a matter of diconnecting wire(s).
If I understand !nVisible correctly, you only want the charge capability, & nothing else. If so, then here is a possible "hardware" fix.
First make sure that all the wires are color coded.
Cut ALL the wires.
If there is only one black wire then reattach it first. (if possible, don't cut this one at all) {This should be ground -}
Connect the plug into your phone. {Be sure holder's power is plugged in}
Reattach & detach the wires one-by-one until the charge light is activated. {if the charge doesn't activate then disconnect that wire again} {Start with Red, then orange, then variatons of red (red is usually the positive +}
Or, try this:
Attach the plug into your phone whilst holder is powered. {if the holder is activating the headset, then you should see a headset icon in the startbar.}
Cut each wire one-by-one until you deactivate the headset icon. {reattaching the wires that don't deactivate.}
start with blues & greens {if present}
Remember; Black is most always ground, & red {or a variation of} is usually positive.
DO THIS AT YOUR OWN RISK!! I personally would do it this way {if no other solutions existed}; but I've been working on electronics since I was a child {& I went to electronics school }
If you $&%* it up It's on you NOT me!

(HELP) xperia stuck in headset mode

its been a few months now and still no parts for my xperia so i cant get it fixed.
i have been wondering if its possible for someone to make a cab to turn off/on hardware headset jack or forcibly use handset speaker when in a call orsomething?
BTW i have tried all possible fixes using the "search feature"
Are you describing the problem where even though there is nothing plugged into the 3.5mm jack, the XPERIA thinks you've got something plugged in? If so, I'm having the same issue and have found that a quick way to fix this is to take the stylus and wiggle it about at the bottom of 3.5mm jack. This clears it up.
well yeah that worked before but my jack is kinda broken but working
some of the metal in the jack is really loose and the jack has a small broken part.
I had the same issue where my headphone jack reported that there was a constant headphone plugged in, it happened after I plugged a damaged headphone port into the phone.
It took many hours of research and a very intricate and careful dissasembly to fix the issue. I meant to take photos, but my primary camera ( my X1 ) was in pieces at the time..
Anyway, there's a little connector inside the headphone jack that makes contact with a pad, closing a circut, if the connector is bent too far out of the way, it doesn't make contact, and the phone thinks there is a headset inserted.
If your connector is actually broken, you'll have to jerry-rig a wire or something between the two plates to force it to know there's nothing in, but then you lose all headphone functions.
I had to bend the strip of copper to -exactly- how it should be, and it worked out for me, my phone is back how it used to be.
I hope this is of some help to someone, if it happens to me again, I'll document it properly, unfortunately I was in a rush this time, so I didn't have time to prepare properly, I went gung-ho and ripped it to pieces to get it right again.
what about a "software" method of fixing this problem?
doesn't windows mobile support turning headset off, from the registry, for example?
while using radio you can still redirect the sound to the main speaker, (this option is available on the radio panel) something like this feature can help us, i think..
Same problem here. I have tried some suggestion over here but didn't work. You may try it: http://forum.xda-developers.com/showthread.php?p=4485113#post4485113
I'm tired with annoying wire headset and now using a BT headset to be able make/receive calls.
Hope somebody can help us before we send back for repairing.
It happened to me, simply insert a clean "cotton buds" and pull it out again. I think, a dirt just got stuck causing some hardware short circuit or something. Don't know....but it definitely worked for me. I have tried those hardresets, softresets, tweaks and unfortunately none of them worked.
try to drain the battery and charge it back up.
Sometimes would be nice to combine some of the threads because they refer to the same problem
http://forum.xda-developers.com/showthread.php?t=529449
Anyway from my knowledge there are two reasons for this problem.
You may guess
1. Hardware:
This issue had been described very often. Of course the jack is a delicate piece of hardware, which could be damaged physically due to some bad plug or violent force.
2. Software:
It's obvious that the connection is controlled by a piece of software.
I realized that the problem had gone with the latest update.
Maybe it would be helpful to know about the firmware version you got on your phone.
P.S.: Anyone out there who may add this issue to the wiki?
scholbert

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] I9000 electronic hardware help (earphone piece)

Hello
I got an I9000. A few days ago I dissasembled the phone to separate the glass from the frame to fix the "home" button.
I was able to remove it without breaking the screen and fixed it. When I assembled everything back together I noticed that the earphone doesn't work and I can't hear what the other person says in a call. If I enable hands free it works well (uses the main speaker of the phone) and if I connect headphones to the audio jack it works as well.
Microphone is working fine (using the audio jack or using the phone's microphone).
I tried to replace the earphone-audiojack-light sensor module and it still doesn't work. I tried 2 different ones with no success.
The light sensor / proximity sensor works good as well. So I don't think there's a damage on the motherboard or the socket itself.
According to the I9000 technician manual it says to follow a few checks for this module that I attached on the attachments.
The components it asks to check are:
U207 - IC-CODEC
UCP200 - IC-MODEM
HDC302 - HEADER-BOARD TO BOARD
Surpsingly I am sure those components are used for other features of the phone. For example the IC-Codec must be the audio codec used to play sound. Sound works perfectly on the other speaker and on the audio jack. IC-MODEM is probably the chip that holds the modem.bin firmware of the phone, so if there was a failure with this chip I think I should have no signal, and I do. HDC302, well, could be, I wonder why tho since I've been carefully with this and I have dissasembled this phone a few times already with no issue.
Could you help me? How do the tests indicated in the manual? I only have a multimeter, but not an oscilloscope.
Thank you!
Hello
Seems this is a tough question. Do you know where I could find information? Maybe another forum that it's more into mobile hardware stuff?
Thank you.
Hello
After checking the pins with a multimeter I noticed that the pins 11 and 13 from the earpiece were not in continuity. Replaced the piece (a few times because all of them were broken) and phone is working again.
Thanks.

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