[Q] Power supply adapter - Xoom Q&A, Help & Troubleshooting

Ok guys,
Quick question for you.
What is the polarity of the power adapter?
Is the center connection, which touches the pin in the Xoom + or -?
I know it's 12VDC @ .5A.
Need to make one quick. Forgot mine somewhere.
Thanks.
Ridilen.

center is 99% times +

Related

Ext hard drive with dock.

Hi,
I just wanted to relate my findings when using external hard drives. The Gtab puts out limited milliamps of 5 volt power which sometimes isn't enough to power up external drives all the way. The leds light up and the motor spins but no read / write = no works!
Yesterday I received my malata / gtab dock and had hoped that it would be able to power up a external drive since it had the power supply plugged directly into itself. This in itself did not work. However using a USB Y Power cable plugged into both the Gtab and the base unit usb ports did the trick! Seems the Y cable can pick-up enough power using both ports to power up the drives!
The drives that didn't work before (sata) now were found and worked properly.
Could I get a link of your dock you are talking about?
The dock -> http://forum.xda-developers.com/showthread.php?t=865038
Y cable
Bit Banger said:
Hi,
I just wanted to relate my findings when using external hard drives. The Gtab puts out limited milliamps of 5 volt power which sometimes isn't enough to power up external drives all the way. The leds light up and the motor spins but no read / write = no works!
Yesterday I received my malata / gtab dock and had hoped that it would be able to power up a external drive since it had the power supply plugged directly into itself. This in itself did not work. However using a USB Y Power cable plugged into both the Gtab and the base unit usb ports did the trick! Seems the Y cable can pick-up enough power using both ports to power up the drives!
The drives that didn't work before (sata) now were found and worked properly.
Click to expand...
Click to collapse
How about a link to which Cable you purchased/used....
Anything like this will work.
http://www.newegg.com/Product/Produ...0736&cm_re=USB_Y_cable-_-12-200-736-_-Product
Odds are you are not going to be walking around with the external HD and dock attached to your "G so why not just get a $10 power supply from RS and power the HD with it. If the HD doesn't have a power port, connect the Power side of the Y cable to the supply.

bought tablet used. power button question & usb cable

Hey guys
I just bought one of these (refurbished off cowboom) and i have a few questions.
1) The powerbutton does not "click" it is very soft and i need to push a little (with no response) to get the tablet to come "on". Is this normal or should it give feedback like the volume up/down buttons?
2) I bought a USB cable for this off NewEgg. When plugging in to my computer it communicates fine but the tablet does not read "Charging". Also, when i plug this usb cable in to a wall charger (usb input) the tablet does not say charging, it just charges EXTREMELY slow (possibly only registering as 5v? but still doesnt read charging?) Should i just buck up and get the official cable/charger from Asus or do you think my unit has issues?
This is the cable i have and i plug it in to a USB input wall charger (from my galaxy s3)
http://www.newegg.com/Product/Product.aspx?Item=9SIA0U009H3151
Thanks!
Brett8187 said:
1) The powerbutton does not "click" it is very soft and i need to push a little (with no response) to get the tablet to come "on". Is this normal or should it give feedback like the volume up/down buttons?
Click to expand...
Click to collapse
It should 'click'. The buttons on the TF101 are a little squishy and loose feeling but the power button should definitely have a click like the volume buttons.
I'd suggest going somewhere local (depending where you are) and picking up an official charger and trying that. If that doesn't work then at least you should be able to return it.
grgmre said:
It should 'click'. The buttons on the TF101 are a little squishy and loose feeling but the power button should definitely have a click like the volume buttons.
I'd suggest going somewhere local (depending where you are) and picking up an official charger and trying that. If that doesn't work then at least you should be able to return it.
Click to expand...
Click to collapse
Grea thanks thats what I was looking for. I can RMA it if need be. Perfect. Thank You

[Q] Philips AS111 force to charge

Hi all,
I have a Philips AS111 docking station/bluetooth speaker/charger. Worked perfectly for my SGS2, however, since I bought a new phone (Sony Xperia Z1 Compact) I'm experiencing some problems.
I bought an micro usb to magnetic connector adapter to be able to connect my phone to the dock without having to open the flaps all the time. I took it apart and it basicly splits the first and fifth pin of the micro USB connector to the pins in the magnetic connector. Unfortunately I may not link to external images...
Unfortunately, my phone does not charge when using the adapter in combination with the Philips dock. It does when using the original Sony USB charger and the adapter, so the adapter is fine.
I measured the voltage on the two pins, and it's 0V. I even tried to fool the dock by putting a 1.5kOhm resistor over several lines. Only when I put a 1.5kOhm resistor between 5V and the connector housing, the dock responded by turning on Bluetooth. Voltage went crazy, flipping between 0 and 3V, but phone still doesn't charge.
I think the sollution is to fool the dock by putting a certain resistor between certain lines or by shorting certain lines. Does anyone have a clue how to fool the dock to think there is a device connected, so it opens the +5V line?
Thank you very much!
Nobody into usb connection protocols? :crying:
Finally got it working. Eventually I needed to connect two wires together inside the device. One of them being 'CLAS1' and the other was Ground. Both could be found on the connector going to the micro usb plug of the device. Unfortunately I can not post a link to the photo I made of it.
mblox said:
Finally got it working. Eventually I needed to connect two wires together inside the device. One of them being 'CLAS1' and the other was Ground. Both could be found on the connector going to the micro usb plug of the device. Unfortunately I can not post a link to the photo I made of it.
Click to expand...
Click to collapse
Hello!
I've just bought an AS111. Charges perfectly my SGS4 but it doesn't do a thing when I try connecting my SGN3 (the one with the micro-usb 3 connector) to the Philips dock. I know that the micro-usb 3 is backwards compatible but I do believe that the AS111's dock outputs too little power - or something like that, I am no expert.
I was wondering that maybe your experience could be of help to me. What do you think? If so, could you please guide me through the stuff you did to the dock? Thank you!

[Q] Split Micro USB Cable - Power and Data from different sources

Hi All,
I have a GROM Audio interface installed in my car which is great for using my phone as media player over my car stereo.
However, I don't think it sends enough juice (amps?) over the +5V to power the handset when I'm using navigation - I see a battery drain when using any nav software.
Is there any cable out there which will take 2 micro USB females to a single male plug? One so that I can send power from my cig plug and one so I can connect the data to the GROM unit?
Is this even possible?
TIA
Same here
doowruc said:
Hi All,
I have a GROM Audio interface installed in my car which is great for using my phone as media player over my car stereo.
However, I don't think it sends enough juice (amps?) over the +5V to power the handset when I'm using navigation - I see a battery drain when using any nav software.
Is there any cable out there which will take 2 micro USB females to a single male plug? One so that I can send power from my cig plug and one so I can connect the data to the GROM unit?
Is this even possible?
TIA
Click to expand...
Click to collapse
I have the exact same issue with a GROM and Note 4. The GROM can't supply quick charging and all the Y cables that I can find out there get power from both sources and then have a max passthru of 1 amp (probably to protect all 3 connected devices from each other). I may have to try making my own and split out data and power (or mod an existing Y cable by cutting the power leads to the data connector so that one side is data and the other is power). Too bad someone doesn't just make one like that.

Lenovo Tab M8 OTG + Charging

I picked up a Lenovo Tab M8 from walmart (Part number: ZA5C0045US). It comes with a small dock that charges the table via a two pin connector.
I was trying to set this up with an OTG cable so that I can attach a high end sound card. I notice that once I plug the OTG cable, the tablet stops charging via the dock. It's like OTG and charging is not allowed at the same time.
I also tried making my own OTG + charging cable (with a 10K resistor between the ID pin and ground), but it seems that the OTG function will not work unless the ID pin is grounded. I know that other devices allow for OTG + charging when the ID pin has a resistor to ground with a certain value.
Is there a way of finding out if lenovo tablets allow this? If so, where can I go an find out what type of resistor value this tablet will detect as allowing the function of OTG + charging?
Also, this tablet is rooted. Is there a software based solution like my old Nexus 7 (2013) where you could enable OTG + charging?
I've been at this for a couple of days now, so any help is greatly appreciated.
Hi,
Have you had any progress on this? I would like the same function.
Doing some reading though. I think a 10k resistor is too low, normally seen 64k or 100k
Hi, I just signed up to leave a reply here. I also was looking for a replacement for my slightly outdated Nexus 2013 in my car and stumbled upon this thread. So got a used M8 (TB 8505F ZA5G0038SE) and gave it a try.
With a 10k (measured 9.8k) resistor between ID pin and ground, OTG and charge works perfectly, without changing anything in software. With a 2A charger, battery charging is pretty slow, but the battery doesn't drain while using navigation and music (contrary to the Nexus )
So, for me it is a quite good solution.
Thank you for the info guys
I also have a TB 8505F and needed this function in my car.
For me the 10K resistor works, now it both charges and I can use my accessory (OBD2 reader)
Before this I tried a 100K resistor and that did not work so I had started to give up.
Just an update, maybe someone needs the info: I tried to make a second Y-OTG-cable with the same components, and it didn't work. Charging went on and off, no otg function. I decided to play again with the resistor values and it worked again with 12.9k. Maybe there is a certain range, which the second cable was slightly out of.
Hi All, i just bought the same tablet for similar purpose and i was wondering if when the cable is built using the 10k-12.9k resistor, i can still use the docking station that it comes with>? has anyone tried it out like this?

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