Just wanted to check. There are contacts on the rear cover, that go to contacts in the phone. Can anyone confirm what these are for? I want to say that the antenna is in that cover, and these are to connect the antenna to the phone. I'm about 95% sure i'm right on this, since i lose a few bars of signal when the rear cover comes off, just wanted to make sure i'm right.
I saw this thread and asked the rep while I was in the store today for warranty stuff, he said he has no idea and that it's either for antenna or inductive charging on a supported charging mat, like the palm pre has.
He showed me what the wireless charging thing looked like on his palm and it looked similar. Apparently you just set the phone down on a mat and it charges.
Don't know if that helped any, but it would be cool if it was for charging. I'll keep my eyes open for any accessories that would confirm this.
The back cover is indeed the antennae. And no, it (unfortunately) has nothing to do with a wireless charging method.
I didn't buy the HTC extended battery but one from amazon sold by Karen Deals. Link is below
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=0NVM3EA1B2VE9HN3AKMA
Battery
Model No: cs-ht8585xl
Part No: 35h000128-00m, ba s400
Rating: 3.7v 2400mah
Lithium Ion
Induction Unit
Palm Pixi charging back with Palm touchstone charging dock
Operating System
Shubcraft 1.4d
Video:
Images are attached below!
Induction charging has the same charging speed as plugging it into a wall outlet. Very fast!
Sidenote:
I tried using a multimeter with the 3 contacts located under the battery and could not get it to register anything (with and without the charger plugged in). I then tried shooting 5v through it using 6 different combination (2 plugs for 3 contacts) and still couldn't get anything. If anyone knows a way to use these 3 contacts for charging please leave feedback. Also if anyone can find a minature microusb male connection that'd be great.
Well done, it's a really nice mod!
The 2400 mAh is a bit too bulky for me, though the extended uptime must be awesome. I'd even consider something similar, were it not that you're using the microusb to charge. If only you could connect it straight to the battery, would be so much more convenient. It'd still work in for instance car kits and attached to a pc.
Never the less, well done.
Looks great, i would try this myself but i cant stand the bulk of extended batteries and the stock metal back would almost defiantly interfere with the current. Where did you get the decal from?
Angelusz said:
Well done, it's a really nice mod!
The 2400 mAh is a bit too bulky for me, though the extended uptime must be awesome. I'd even consider something similar, were it not that you're using the microusb to charge. If only you could connect it straight to the battery, would be so much more convenient. It'd still work in for instance car kits and attached to a pc.
Never the less, well done.
Click to expand...
Click to collapse
You can't plug in directly to the battery since the battery doesn't have a balancer board on it and it would explode if it were to be overcharged without one.
JJbdoggg said:
Looks great, i would try this myself but i cant stand the bulk of extended batteries and the stock metal back would almost defiantly interfere with the current. Where did you get the decal from?
Click to expand...
Click to collapse
I got the decal in the automotive section of Walmart. It came with 2 big/4small stickers for 7usd
UPDATE: Made the microusb head smaller! Letting liquid electrical tape dry then I'll post pics.
this is a really nice mod. what about the possiblly of going via the nav panel connectors instead of micro usb. this would as far as i know leave the usb port free and also not have the disadvantage of having a usb connector attached which can be easily damged.
Personalyu i wouldnt do this mod as i use my phone to tether a hell of a lot so it seems pointless to me, but being able to just sit your phone down and have it charge is awesome.
Great work!!!!
veda_sticks said:
this is a really nice mod. what about the possiblly of going via the nav panel connectors instead of micro usb. this would as far as i know leave the usb port free and also not have the disadvantage of having a usb connector attached which can be easily damged.
Personalyu i wouldnt do this mod as i use my phone to tether a hell of a lot so it seems pointless to me, but being able to just sit your phone down and have it charge is awesome.
Great work!!!!
Click to expand...
Click to collapse
I tired the navpanel connections with no success. If anyone has a multimeter please try to do it to theirs (with charger plugged in).
that is really odd....only think i can think of is manye theres something that needs to happen with the middle pin.
nice work i think that decal are very cute indeed!
PPL this is knowed from a long time! This pins are used for example with Car Kit like CU s400: http://www.slashgear.com/htc-hd2-cu-s400-car-kit-gets-priced-detailed-coming-december-1360143/
This car kit is in two versions: like this on 1st photo - use other battery cover which use this "mysterious" pins to run NaviPanel and charging battery and 2nd version with charging via microUSB port.
I hope this helps a bit.
veda_sticks said:
that is really odd....only think i can think of is manye theres something that needs to happen with the middle pin.
Click to expand...
Click to collapse
This "odd" middle pin you can find in every phone battery too. If you depart any battery you can find there a little electronic circuit.
I think, that this pin is used to metering battery charge, but i can be wrong - im not advanced in electornics.
I'm well aware of the existance of these products but cannot figure out what the three contacts below the batteries are.
Maybe some users having one. In that case he/she can make photos of all connectors or better - check it with multimeter which connector is +, - and this middle one.
Maybe some service manuals can tell something more abt this. I searched for it and i did'nt find nothing useful.
FRANQ_23_PL said:
Maybe some users having one. In that case he/she can make photos of all connectors or better - check it with multimeter which connector is +, - and this middle one.
Maybe some service manuals can tell something more abt this. I searched for it and i did'nt find nothing useful.
Click to expand...
Click to collapse
I also did a search on google and xda but with no luck. I don't think it inputs 5v into the machine since I did shoot 5v into the 3 connectors using different combination.
Hi all,
The contact closest to the center of the phone (looking along the longest axis of the phone) is the +5V, the one furthest from the +5V is the ground, and there's a small voltage on the center contact, positive to ground. These +5V voltage shows up (on my phone) only when the mini-USB charger is plugged in.
I've got the +5V terminal of the Pre plate attached to the +5V contact on the phone, and the other one attached to the GND contact. Inductive charging works at 341ma (as measure by the hardware and read by BattClock) at maximum, which is probably not coincidentally also the limit set on USB charging, at least from my laptop.
I tried hooking the Touchstone up to a Apple ~1" cubed charger, didn't get any charge. I haven't read the USB power specifications, but according to the people at the Palm forums you have to have a USB spec power-capable charger to initialize the Touchstone, and the USB ICs signal this by connecting the two data lines. This can be approximated by clipping a USB cable and twisting the data lines together on the Touchstone side of the cable. This allowed the Apple charger to power the Touchstone.
The HTC stock charger works fine, as does an 800ma Verizon charger I had laying around. I tried hooking the Touchstone up to both a [email protected] switching charger and a 5V 8A supply, the Touchstone still charged at 341ma. I'm guessing this is software, firmware or hardware limited, just like the computer USB connection. I would speculate that if you shorted the middle pin to the ground pin, it might remove this restriction. Or fry your phone, I didn't try it.
There's a guy on the Pre forums who got the Touchstone to consume about 1.02A (http://forums.precentral.net/palm-p...b-adapters-touchstone-dock-2.html#post2020491) so the thing can, apparently transfer some power. I don't know how long it would last at those wattages, but I'm going to read a bit on the USB power spec and see if the 341ma limit can be lifted.
It's kind of nice to use the internal connector, because it leaves the microUSB port open. If anyone has any questions feel free to ask. With the relevant portion of the Pre cover stuck to the back of my phone, there are no wires out of the chassis and the added part doesn't add any considerable bulk to the phone. It protrudes less than the camera.
Anyways, hope this isn't a thread-jack or too long, but I figured it might help anyone that's going to take the time to do this.
Thanks to the community here.
Did you dremel and hotglue the plastic case to the metal case? Interweb highfive from me to you!
Can you post pictures of the inside wiring please?
I did. I basically cut out a square from the HD2 back large enough to hold the coiled length of wire that is needed to allow the back to be removed and articulated. Then I used Super Glue to fix the section of the Pre back containing the inductive coil and circuitry to the HD2 back.
If you're trying to maintain your warranty I might suggest DigiKey part number 478-4687-1-ND, it's from the AVX "MOBO Spring Contact Interconnect Solutions" catalog under battery connectors (I can send you a .pdf copy of the catalog, it's too big to upload to forum). This is a 3mm pitch connector that should mate well with the internal connector - but - I don't have calipers so I would measure before ordering. I just soldered the wires to my HD2.
I'll post some pictures soonish.
And yeah, high five for sure. Thanks for pioneering this. My last phone was retired when the power connector became flaky, so it's nice not to have to worry about the contact wearing out.
Ur mod is on a dutch popular website!
http://tweakers.net/nieuws/69360/mod-maakt-draadloos-laden-mogelijk-op-htc-hd2.html
Right angle micro-usb
I'm looking to do the same thing with my Vibrant and have been searching for a similar connector. I just did a quick google search and found these angled connectors:
http://www.usbfirewire.com/u_microb_cables_angled.html
I tried soldering it your way with no sucess
Soldering pins are as shown
(If viewing vertically with top up)
(leftside of hd2) negative x positive (center of hd2)
bumping an old thread to see if you've taken pictures of the contact points yet.
Sorry it took me so long to reply. Two pictures, the first is the terminal with the wires soldered in, the second shows how I got the cables from the Palm coil/board through the cover. The terminals as you look along the longest axis of the phone with the microUSB plug closest to you are GND, something, and +5v.
So from left to right: 1 GND / 2 ? / 3 +5v.
As of last night my A500 will not charge. I left the device overnight and unfortunately now have Zero charge.
- My charger makes a noise, I think it always did, so I'm assuming the charger is OK.
Can anyone confirm that the chargers give off a kind of electrical buzz when working?
- I get no light at all on my A500. If the charger is OK I'm thinking something has gone within the tab, be that circuit or battery.
Any ideas or tips here?
- Sadly I do not have a multi-meter to test either the charger or the tab, no friends with a similar device, I've lost my proof or purchase (which is painful and rules out warranty), and am a bit stuck what to do.
Any ideas?
- I've heard/read that allowing the power to drop too low can cause a problem. Obviously Zero is bad in this case.
Can anyone confirm this rumour or suggest a fix?
- I did try entering recovery and resetting the battery stats - whether this made things worse or not is unclear - it certainly did not help.
ANY HELP OR IDEAS WELCOME (bear in mind that I have spent quite some time searching and trying other peoples' ideas already though.
Thanks,
ta-wan said:
As of last night my A500 will not charge. I left the device overnight and unfortunately now have Zero charge.
- My charger makes a noise, I think it always did, so I'm assuming the charger is OK.
Can anyone confirm that the chargers give off a kind of electrical buzz when working?
- I get no light at all on my A500. If the charger is OK I'm thinking something has gone within the tab, be that circuit or battery.
Any ideas or tips here?
- Sadly I do not have a multi-meter to test either the charger or the tab, no friends with a similar device, I've lost my proof or purchase (which is painful and rules out warranty), and am a bit stuck what to do.
Any ideas?
- I've heard/read that allowing the power to drop too low can cause a problem. Obviously Zero is bad in this case. Y
Can anyone confirm this rumour or suggest a fix?
- I did try entering recovery and resetting the battery stats - whether this made things worse or not is unclear - it certainly did not help.
ANY HELP OR IDEAS WELCOME (bear in mind that I have spent quite some time searching and trying other peoples' ideas already though.
Thanks,
Click to expand...
Click to collapse
Quit guessing and get the charger checked
In reply to myself and to help those with a similar issue.
Yes a charger my buzz when good OR bad. The trick to seeing whether it is working or not (aside from it charging the pad) is to see if it gets warm -- no warmth, probably broken.
As for measuring with a multimeter the trick is to insert a paper clip into the small hole in the plug and measure the voltage between the outer plug (negative) and the paperclip (linked to the positive). Few multimeters have pins that will fit inside the super tiny plug on the A500 charger so the paperclip is your way in - obviously be sure not to short circuit the thing!
There are many chargers available out there. In Australia Jay-Car and **** Smith both have perfect chargers, the correct type, voltage, amps etc, they even come with multiple pins -- sadly none fit the A500!
My solution was to go to Infinity who are a provider of Acer spare parts. They have the correct charger and are easy to deal with BUT -- It's not cheap! They want $40 for the charger and a further $30 for the little bit on the end that gives the plug its nationality. In most cases we do not need this though as we can reuse our old one, but hey, not cheap all the same.
Still, it works and I'd rather be ripped off than get the wrong thing and blow the mother board.
NOTE: if you do get a charger from anyone other than Acer or a supplier of theirs - be sure to match every detail of your current charger - especially polarity.
I had problems with charging on my A500. When I plugged in the charger the power button would turn orange for a few seconds and then start flashing white.
I took the back cover off and found that the wire to the centre pin of the power connector on the tablet had almost broken off. I touched it lightly and it came away. Re-soldering the wire fixed the problem, it now charges as expected.
After fixing it I measured the charge current. It starts at a small value for a few seconds and then jumps to full charge rate. It seems there was enough of a connection to handle the small current but as soon as it switched to full charge current the voltage drop across the remains of the connection was too much and charging stopped.
Charging problem
I too just experienced the no charging problem. I looked up how to open up the tablet and tried to trouble shoot the problem myself. My problem turned out to be a very easy fix. The Posative lead on the back of the charger port had come loose, a simple touch of the soldering iron and its fixed. I thought since I had it open I might as well go ahead and change the battery too since it was 4 years old. Its an old tablet and time to turn it into a hand me down for a lucky niece or nephew
Hi,
I just recently had to have my charging port resoldered into my Motorola because it finally failed and ended up coming out of the phone housing on the charger connector. Prior to that, the phone was connecting to the charger, and I had two I was using. One in my car and one in the house. After I the port fell out, and until I could take it to a phone fixer, the workaround was I was charging and swapping out batteries with a Motorola Blur. What was weird is that both phone housings look identical; however, the older phone would pick up both chargers, and my Defy would not.
After they soldered in a new charging port a couple of days ago I left with clear assurance that everything was working great, and charging was a-go. Mmmhmm. On my way back home, which was an hour from the repair place, and tried to hook it up to the charger in my car. Still not charging. When I called the repair place they suggested checking it with my home charger too, once I got back home and then let them know if there was still a problem. They reassured me they had hooked up to several chargers while it was there, and all were good.
I got home, tried the home charger, and still no connection. This time when I called them back I got another person who started asking about my charger and the little lines on the underside of the metal piece that inserts into my phone. She asked if the metal tracks met the plastic on the back end of the charger itself or whether they stopped with a gap between the tracks and the plastic housing. On both my chargers I saw the tracks did NOT meet the plastic, and she said they only use Samsung chargers in their shop because it creates a better connection, and some phones need that.
Pretty sure the chargers I have were not OEM chargers for this Motorola so I am going to try to get to a place with Samsung charger so I can puzzle this out, but I am confused in that one Motorola charges and the other doesn't.
Any experience or ideas or suggestions????
Kristie
Hi,
Please can anyone tell me whether the little connector on the vibration motor is supposed to be soldered to the motherboard or does it just touch at a certain place?
I've already posted another thread about having replaced the battery but it doesn't seem to charge.
Without going into details all over again, a local repair shop replaced the charging port last week - my phone was returned in seemingly working order but they had assured me a bulging battery was OK. I charged my phone but the battery was draining quickly, which was what led me to research a bit more and discovered how dangerous it can be so I ordered a new one.
In the process of fitting the new battery, I discovered half the screws in my phone missing, no copper tape, plus there is no black rubber cover over the charging port & vibration motor as is shown on the guide for replacing the battery on the fixit.com website.
So I'm wondering if the small square 'connecctor' (?) part of the vibration motor ought to be soldered to the motherboard or is it just normally held in place by the black rubber cover? In my phone now, the 'connector' doesn't stay touching motherboard so I'm not sure if this would affect the phone and stop it from functioning or would it just mean the vibration wouldn't work?
Would this affect whether the battery could charge or not?
(Incidentally, I discovered that the the battery connector was upside down compared to the pictures in the ifixit.com guide (the red wire was nearest to the battery instead of the black wire being nearest) so I was hopeful that by correcting it to match the picture, I would have solved the problem but unfortunately, it didn't make any difference. When I connect a wall charger, the screen just flashes and when I connect it to my laptop, it just gets a blinking white led but nothing more. It seems strange to me that it wouldn't make a difference - is it like a usb-c cable in that it can go either way round?)
The battery seller asked for photos of the new battery in my phone and has now offered to replace it - is this likely to make a difference or is the vibration motor not being attached to the motherboard the cause of the problem?
I'll be so grateful for some help.