Charging using USB - Eee Pad Transformer General

Hello
as we know, we cannot charge our Transformer using USB.
Thats a pitty as I bought a Solat Charger (expensive one) which can charge USB-Devices.
Now does anyone know how we can fix this? I thought about buying a second cable and changing some connectors? Power is power, it has to work somehow...
any ideas?
thanks
Dominik
Sent from my LG-E900 using Board Express

You've got to somehow mod it to give us 15v, buy a usb 3.0 female and change some pin layouts.

DominikReber said:
Hello
as we know, we cannot charge our Transformer using USB.
Thats a pitty as I bought a Solat Charger (expensive one) which can charge USB-Devices.
Now does anyone know how we can fix this? I thought about buying a second cable and changing some connectors? Power is power, it has to work somehow...
any ideas?
thanks
Dominik
Sent from my LG-E900 using Board Express
Click to expand...
Click to collapse
It depends how fast you want to charge. I plugged the ASUS cable into an apple charger last night. I then connected it to the tablet and shut the tablet down. When I started charging the tablet was at 72%, when I got up 7.5 hours later, it was up to 93%. So it wouldn't be enough to charge it from nearly empty, but it might be enough to top up the charge after using the tab for a couple of hours. This is with the ASUS cable and no modification to the charger at all.

According to the Tip sheet that came with my TF, USB on a computer can charge it, but only when the TF is in sleep mode (screen off) or powered off.
Have you tried the solat charger to see if it does indeed charge the TF when the screen is off?

Most solat chargers have a 12v plug to power car cigarette jack devices. Connect this to a female usb plug and you can charge your tranformer and dock.

Search for the Charging thread started by Devcake. There is an extensive discussion on the charging requirements of the TF and charging options. Also the pinout and function for the connector. It is NOT true USB 3.0. It just happens to use that connector and some of the conductors.

Related

Aftermarket charger.

Hey guys. Got an aftermarket charger after my original gave up on day one and i didnt want to have to send everything back. When i plug the phone in the scren becomes un responise, but the hardware buttons stil work. Can anyone explain this? obviously i ned to try a diferant charger, specificaly for the galaxy but how can the charger stop the screen working? Many thanks.
Sent from my GT-I9000 using XDA App
Yes the same thing happened to me,,i took the charger back..and got a proper one
just for reference, the Black Berry 9600 chargers are compatible with SGS 9000
i bough one for car use
So are the moto chargers.
My car charger is an old razor v3 mini-usb with a mini-usb adapter.
My wall charger is an old Razor v9m charger.
Never tested a BB charger as i have always charged mine with the moto ones that were already plugged in
yup i also purchased a mini usb to micro usb adapter to use my old Moto chargers with my SGS
The same happened with me while using the stock charger in a train. The capacitive touch buttons and the screen stopped working, but the hardware buttons were working. So I plugged in my laptop and used a USB cable for charging it.
Never heard of this before....
I've not come across a charger that does not work.
The chatger works but the phone doesnt while its plugged in! my back button and menu button still work along with hardware buttons...... Weird... Allready ordered an official replacement
Sent from my GT-I9000 using XDA App
jakers said:
The chatger works but the phone doesnt while its plugged in! my back button and menu button still work along with hardware buttons...... Weird... Allready ordered an official replacement
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
That will be the cable that has issues.
Pity you couldn't have tried another cable.
I am using a nokia car charger, also works fine. Blackberry didn't work for me
Yeah i know the cable causes the issue but does anyone know how? obviously other after market chargers are ok... Phone charges fine too, just cant use it when charging...
Sent from my GT-I9000 using XDA App
i'm using After market chargers too, but i have no problem
my car charger is using a BlackBerry 9500 charger (2A)
an in my PC i use a Motorola sync/charge USB mini + micro USB adapter to make it compatible with SGS 9000
they all work fine
i have not even unpacked my SGS usb cable that came in the box
Is any of this chargers really recognized as charger (charging with more than 500mA)?
You can easily verify this with the app "OSmonitor".
IF you see this: "USB Power: Online and at AC Power: Online" everything is working as it should. But if you see "AC power: Offline" your phone thinks the charger is a pc and it will only charge with 500mA.
TDO said:
Is any of this chargers really recognized as charger (charging with more than 500mA)?
You can easily verify this with the app "OSmonitor".
IF you see this: "USB Power: Online and at AC Power: Online" everything is working as it should. But if you see "AC power: Offline" your phone thinks the charger is a pc and it will only charge with 500mA.
Click to expand...
Click to collapse
The only problem with software informers here though is for those that have the problem and the screen locks up whilst being charged the software is of little use.
This question was not for people having a faulty charger but for the ones claiming that they have a functioning charger!
If the charger is not really recognized as charger it is useless for navigation. As the Galaxy S need more than the 500mA while navigating (with GPS).
yeah, minimum you need a 1A (1000mAh) charger
that's why i prefer the 2A chargers, it gives just enough juice to actually charge the battery, and use GPS+3G+WiFi+Bluetooth
else the car charger will not even be enough to power all those, and it will still consume the battery power.
that's from experience from my HTC phones
TDO said:
This question was not for people having a faulty charger but for the ones claiming that they have a functioning charger!
If the charger is not really recognized as charger it is useless for navigation. As the Galaxy S need more than the 500mA while navigating (with GPS).
Click to expand...
Click to collapse
I bought a Sharper Image Retractable USB kit that has adapters for most of the USB sockets out there. But the Micro USB that came with the kit fails to work with the SGS, the retractable USB cable is set up like an extension cable which works fine as an extension cable but putting on the adapters dont work.

Charging without Samsung AC Adapter?

I went out of town this week and made sure to grab my USB cable, but left the AC adapter at home figuring I'd just charge off my laptop via usb. Apparently not... I also tried plugging the USB cord into my iPhone AC/usb adapter with no luck. The only thing I've found is that when you turn off the Tab and connect to one of these devices, a green battery indicator will pop up showing that it is charging. Well, after about 16 hours, it made it from 15% all the way up to 48%. Does anyone know any way around turning it off to charge or why it is barely charging when it is off?
Jaydawgx7 said:
I went out of town this week and made sure to grab my USB cable, but left the AC adapter at home figuring I'd just charge off my laptop via usb. Apparently not... I also tried plugging the USB cord into my iPhone AC/usb adapter with no luck. The only thing I've found is that when you turn off the Tab and connect to one of these devices, a green battery indicator will pop up showing that it is charging. Well, after about 16 hours, it made it from 15% all the way up to 48%. Does anyone know any way around turning it off to charge or why it is barely charging when it is off?
Click to expand...
Click to collapse
Well seeing as it has a 7000mAh battery, just about any run-of-the-mill USB charger isn't going to cut it. The amperage would have higher as well. Now i would hazard that an iPad charger (10 watts) would probably work just fine vs an iPod charger.
Your laptop's USB port isn't providing enough juice to charge fully. With the screen off it will only trickle charge and very slowly at that.
You'll need at least 5 Volt 2 Amp chargers.
You can also try this:
http://forum.xda-developers.com/showpost.php?p=14890063&postcount=16
Or this:
http://cgi.ebay.com/190522553195?ru...ee-All-Categories&_fvi=1&_rdc=1#ht_3085wt_905
I've ordered both last week but neither have arrived yet. I'll report back.
You need a 5vdc supply that will provide 2A. 10W, not 5w as the previous post said. That adapter on ebay won't help the charge, it just disconnects the data line so it does not change its mode when connected to a computer. There are a lot of power supplies that will work and even more that won't, just made sure it supplies 2a. If you want to charge off your laptop then you will want a Y adapter similar to what is on usb powered hard drives but even then you will need to use 2 usb 2.0 or 3.0 ports and will provably only get 1a out.
Sent from my GT-P7510 using XDA Premium App

Impossible to charge sg2 in car

Hi all, just came 3 days ago from an htc hd2, and so far I am more than happy with it.
I have only one complaint and maybe you guys will help me sharing your experience : I can't charge this phone in my car while using gps.
It seems that the power adapter is not powerful enough to charge the phone screen on.
The car charger has a 5v 1000ma output, more than the regular wall charger provided by Samsung and it was working well before with my HD2 so I have no clue about this problem.
Did you experience that issue too, else can you share what car charger do you use?
try to buy new standard car charger with micro plug.. 13 eur and you will be saved..
Sent from my GT-I9100 using XDA App
Charger doesn't matter unless the phone is dropping into USB charging mode - phone limits to around 600-650 mA by default.
Custom kernels can bump this limit up for I9100 users. I777 users are screwed - we've got a crippled charger chip.
I had the same problem, I used the samsung one, useless, so I used my iPad charger, which is 2A, and charges the iPad quick, still useless. We drove from Bathurst NSW, down to Melbourne, about 10 hour drive, plugged in all the way using GPS, and about an hour from home, the connect to charger warning came on!! So once I stopped GPS, it started taking charge. Looks like when the phone is in use, it draws more then it takes charge, plus I read somewhere on here the phone is limited on the charge it takes, so using the 2A does nothing different then the stock 500mA charger.
I always had this problem with my Nexus One, although they are different phones, the problem is the same, uses more power then it can recharge in USB mode.
After trying 3 or 4 different charges I remember that I found one ultra-cheap 'made in taiwan' from a street seller that worked very well.... so it's kind of a lucky shot!
good luck!
Im using a genuine Samsung SGS2 charger and I can charge and run Sygic just fine. I started my journey with 80% and 40mins later I was up to 91% when I stopped and got out. (not in aeroplane mode..)
Very interesting feedbacks... So that confirm that is clearly not a matter of output amperage power.
It is now the same problem on the galaxy tab 10.1, for quickly charge this tab you need the Samsung compatible usb adapter.
It can be likely with a tab bringing a proprietary plug, but I didn't thought it will be the same with a Samsung phone bringing a regular micro usb plug. Quite frustrating and disappointing!
I will search around a micro plug car charger as suggested by redzion, but actually I don't clearly see the difference with my usb charger + a micro usb cable.
Double post, sorry.
If I use the usb cable from my cd player I have the same problem but if I use the official Samsung car charger Ithe only problem I have is the phone getting stupid hot
Sent from my GT-I9100 using xda premium
Oh Samsung, when you will understand?!
Samsung DOES follow the USB charging standard - it goes to its highest current setting when a charger that follows the standard is connected.
Note that iPad/iPhone chargers do NOT follow the standard - Samsungs will treat these as USB hosts and limit to 450 mA instead of 600-650.
Modified kernels can increase both of these values on I9100s.
The only thing Samsung really did **** up is counting screen/CPU current usage against the charge current limits - that's just stupid.
So the charger has smarts. On the i9000 factory chargers, the data pins were bridged. Bridging these pins manually on a USB cable when connecting to a USB source (such as a PC) enabled full current charging. You can see this in Settings -> About; it will say either USB or AC charging.
Do you think this is the case with the i9100?
I don't condone testing this theory on your i9100. Increasing the max current via custom ROM may be a safer solution.
I had the same problem. Two things fixed it for me:
1) I bought this charger: Sony Ericsson AN300 Micro USB 10€
2) I am using a custom kernel now
Any charger that is rated at 1000mA or more (per port) will do just fine. The problem is the cable - you need a quality microUSB cable, or it won't provide all the juice you need. I had the same issue, and I swapped three chargers until I found the real culprit.
Try with the charger you have now and the mUSB cable that was in the phone box - it should work well with that one.
I just press the power button to turn the screen off. when i need the sat nav i press the power and it still tracks you so there is no delay. With the screen off it does charge.
same problem
Duffman19 said:
I just press the power button to turn the screen off. when i need the sat nav i press the power and it still tracks you so there is no delay. With the screen off it does charge.
Click to expand...
Click to collapse
You are right, but even if it is better than nothing the charging time is still a big problem.
Yesterday I drove for at least 40mn phone off. Arrived to destination, I turn the device on: it charged only from 0 to 5%
I would like to test the mariusi theory concerning the Samsung micro usb cable, unfortunately on my SgsII box I just have a wall charger, no a microusb-usb cable.
Entropy512 said:
Samsung DOES follow the USB charging standard - it goes to its highest current setting when a charger that follows the standard is connected.
Click to expand...
Click to collapse
Is there a way to know before buying if the charger respect this charging standard?
I have some cheap usb chargers here and no one is a fast as the one provided by Samsung.
Entropy512 said:
The only thing Samsung really did **** up is counting screen/CPU current usage against the charge current limits - that's just stupid.
Click to expand...
Click to collapse
Maybe for safety purpose? Gps phones can become very hot behind the car glass.
Samsung are trying to "encourage" you to buy only their official accessories. To do this they've wired something differently in their chargers and cables. This "problem" exists on the Galaxy Tab too and can be solved with this adapter...
http://www.ebay.co.uk/itm/USB-car-w...ccessories&hash=item2c5c07736b#ht_3084wt_1163
It's cheap and turns a trickle charge into a full charge. I don't know the specifics of what they've done, but their USB charging just isn't the same as most others manufacturers.
Archer said:
It's cheap and turns a trickle charge into a full charge. I don't know the specifics of what they've done, but their USB charging just isn't the same as most others manufacturers.
Click to expand...
Click to collapse
Great find.
Pretty sure it just bridges the data pins.

Transformer stuck with "Connect your Charger", charging slowly

Hello.
I m having a problem with my transformer. Right now it is charging slow as if it was connected to the computer and not the wall plug. Also the message "Connect your Charger" won't go out of the screen, even if it is connected or fully charged. I flashed a custom ROM to see if it fixed something, but I had no luck. The cable works fine to connect the transformer o my PC the only thing wrong is that is is not charging properly and the message won't go off. Do you have any idea of what could be happening? My wall charger is model OB-1LF, which I believe is not the one with the known fault. Any ideas?
the adapter is surely broken.
This will sound nuts but, put your wall charger in a plastic baggie [push out all the air and then seal the bag] and put it in your freezer compartment for say 3hrs. Take it out [still in the bag] and let the charger warm up to room temp.
The charger may now work. It is worth a try. You would be trying to be sure the thermal fuse inside the charger is reset. I brought one back to life that way.
hshoem1
the TF uses pin 7 in the USB connector to signal the charger to use the 15v output. If the charger does not see a gnd on pin7 it will only charge at 5V as ypou are seeing. Are you using an extension usb cable? If no then check the pins on the TF and cable for bent or damaged pins. Also try the freezer as the charger may have gone into safety reset.
Thanks for the answers. I will try the bag and freezer to see if it gets fixed.
I know that this freezer trick works (also with broken hard drives too apparently), but what's the physical reasoning behind it? I swear I've seen a good explanation of it before but I can't remember..
Same problem here... Even had the charger replaced but of no use. It does charge wth a different (do it yourself) charger usig the same cable.Maybe that doesn't have the 5v/12v mode or something...
Going to order a new adapter and hope thatll fix it otherwise I'll send the entire transformer for repair i guess :/
I just got one today (got a good price on Amazon)
it just will not charge, tried all the fixes! not too happy as i went for the asus over the ipad and apparently quite a few people have charging issues with it.
charges very slowly through my laptop
From reading posts on forums is sounds like a few people are having it and Asus should of recalled the charger.
phone call to Asus tomorrow
asdfuogh said:
I know that this freezer trick works (also with broken hard drives too apparently), but what's the physical reasoning behind it? I swear I've seen a good explanation of it before but I can't remember..
Click to expand...
Click to collapse
There is overtemp protection circuit that should reset once the charger cools, but apparently it needs to cool down past room temp. The freezer is cold enough to reset it. I would not buy a new TF charger search for devcakes discussion there several aftermarket chargers that work well
Check the cable. I had the same problem. At first I thought it was because of faulty charger and had it returned and got a new one from Asus, but still had the same issue. Then I returned the cable for a new one, it worked flawlessly.
A plus: Asus gave me new cable which was much longer than the original one.
the cable is fine, used it to charge via my laptop
I had the same issue with my charger. I called up Asus and was able to send it in for repair, after a couple days they mailed me a new charger and cable.
Sent from my Transformer TF101 using xda premium
mglancy23 said:
the cable is fine, used it to charge via my laptop
Click to expand...
Click to collapse
Charging with your laptop does not involve pin 7 and supplies 5V. If pin 7 or that conductor is bad or you use an incorrect USB extension cable, the pin 7 signal will not get to the charger and will not supply the 15V charge voltage for normal charge.
Rumbleweed said:
Charging with your laptop does not involve pin 7 and supplies 5V. If pin 7 opr that conductor is bad or you use an incorrect USB extension cable, the pin 7 signal will not get to the charger and will not supply the 15V charge voltage for normal charge.
Click to expand...
Click to collapse
Cheers will send the cable as well to be sure but am pretty confident its the power adapter.
Hopefully i will have an adapter for next week.
I had a brief play on it and i was quite impressed, the stock browser was surprinsignly good and may unistall dolphin.
I tried the freezer trick, but it didn't worked. I ordered another wall charger to see if it works. What's really weird about this is that the Connect your Charger message will not go off the screen. It doesn't matter if it has 100% charge it will still show "Connect your Charger".
In my case my Transformer didn't want to charge at all. The red light never came up while connected, the only way to fix it was to drain my Transformer all the way until shutdown and then plug it in and voila! It started charging again ever dince.
Great tips by the way!
Thanks
Sent from my Atrix 4G using Tapatalk
Just an update, after ordering a new adapter (with cable) it now works... Appearantly the cable was the problem afterall...
New cable with old charger = ok, new cable with new charger = ok, old cable with new charger = no go, old cable with old charger = no go.
And old cable with 3rd party adapter supplying 12V = ok, heh...
New cable is longer indeed, now I just need to think if I wanna go through the RMA process again for the old cable. But yeah, cable was the issue (out of nowhere btw).
dagrim1 said:
Just an update, after ordering a new adapter (with cable) it now works... Appearantly the cable was the problem afterall...
New cable with old charger = ok, new cable with new charger = ok, old cable with new charger = no go, old cable with old charger = no go.
And old cable with 3rd party adapter supplying 12V = ok, heh...
New cable is longer indeed, now I just need to think if I wanna go through the RMA process again for the old cable. But yeah, cable was the issue (out of nowhere btw).
Click to expand...
Click to collapse
The Pin 7 Connection I referenced earlier is bad. This prevents the charger from outputting 15V.
Rumbleweed said:
The Pin 7 Connection I referenced earlier is bad. This prevents the charger from outputting 15V.
Click to expand...
Click to collapse
Yeah, I read your posts about that... couldn't see anything wrong with it on the outside though (with my eye) so unfortunately no clearly bent usb-pins or anything.
Any tips on things I can check? Could easily be on the inside as well of course in which case I can just forget about fixing it. At least it still works with another (non asus) adapter.
Mine was also doing a slow trickle charge. I ended up getting a new charger, but found that the problem was with the cable, not the "wall wart". I can still use my old one with the new cable and works fine as well.

Bricked the power adapter +

Last night the power adapter died. The extension cord it was plugged into was very hot where the adaptor was plugged in. Maybe the cord killed the adaptor.
Asnd the micro USB port has gotten worse.
I have many micro USB chargers and cables designed for phones but none of them except a very light weight one are not working on the TPT.
I have it charging now 6 hours and not yet 70 %.
One of my chargers accepts a USB - micro cable but the TPT cable is also not working nor any other cables either.
Is this the death of the USB port I've been reading about?
Is the USB micro standard off the shelf or Lenovo special?
Waiting for IBM Israel to get back to me.
Thanks for any help you can give.
Shofar
most of phone charger is 1A
Thinkpad charger is 2A, so it's normal that charging Thinkpad with phone charger is very slow !
Bad IBM service
After 12 days I have my TPT back BUT!!!!
New motherboard and the micro USB fits good.
BUT!!!
The did not (check) or replace the AC power supply or USB cable as I asked them to do.
Trickle charging with 1 Amp phone charger.
Also the motherboard comes back with:
Serial # 000000
Model: 00000
What can I do???
Shofar
Shofar1 said:
After 12 days I have my TPT back BUT!!!!
New motherboard and the micro USB fits good.
BUT!!!
The did not (check) or replace the AC power supply or USB cable as I asked them to do.
Trickle charging with 1 Amp phone charger.
Also the motherboard comes back with:
Serial # 000000
Model: 00000
What can I do???
Shofar
Click to expand...
Click to collapse
Buy a new charger
If you can do without the TPT for a couple hours the 1a with the device turned off charges pretty well, I also dug up an old iphone 1st gen charger and its 1.5 amp, i had like 3 of them around the house was a happy little surprise as I have already lost my lenovo charger
I tested with a Sony Ericsson cord and Lenovo's power adapter, but the TPT wouldn't charge. Certainly, it doesn't charge either with Sony Ericsson power adapter and Lenovo's cord. It must be end2end Lenovo.
Would it charge faster if I configure USB to "only charging"?
if you are using a wall plug-in charger, the usb menu should not come up that only comes up for pc link. the cable does not matter on mine, im using an apple charger and a Motorola cable from my photon and it work albeit slow, the best thing to do is completely turn the tablet off, its not going to charge too well if you are using it while trying to charge and the adapter only pushes an amp out.
Sad, you can't peruse any thinkpad tablet forums without hearing about defective usb ports.

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