Hey guys I have burned my mUSB port by connecting some chinese charger. I have read the forums but found nothing that could help me.
Symptoms: no reaction from pc and phone when I plug in the cable, charging is too slow.
How to fix:
1. Take a multimeter and check whether there is a short circuit between all contacts in USB cable.
2. If there is a short circuit beetwen data+/- and ground you have to remove the folowing IC
this IC is burned when +5V are connected to data+/- contact and give the symptoms not connected to PC.
This solution only worked for me, do at your own risk!
UP! This is usefull
Isn`t it IC PM7250?
Remember time, when I was forced to resolder it
Its fsusb30
Low-Power, Two-Port, High-Speed USB 2.0 (480Mbps) Switch
Related
need expetise and advise
my ATOM cannot charge and cannot connect via activesync
battery and usd cable and power charger are proven OK, tested with other Atom , it works
now suspect mini usb port problem or software or other hardware problem
when i hook up charger or usb cable , the red light on for a while and off
i can see the charging logo on for a while, i go to POWER screen, can see charging but just a while only
tell me all possbile solution
million thanks
This could be hardware error...the usb port...
But...try it with carefully plug the usb cable, slowly...don't pull it to end of device slot...
Just untill the red light of battery charging turned on...then leave it...
hope this help...
cmiiw
same problem..
i had this problem recently as well, mine turned out the usb sockets on one of my notebooks couldn't cope with the current being pulled to charge and so shut themselves down stopping the charging after a few seconds. i found a mains to usb charger plugged it in and left it for an hour and all was ok again. if you don't have a mains charger try one of the dual usb to mini leads you get with some external drives, the one i tried seems to spread the load enough to charge the device
hope its something as simple as this for you as well
the atom series from quanta have a lousy usb port and ear piece component used
both of these component need to be hot air-ed out of the board in order to do replacement.
the usb port will be easily fallen off from the board due to poor soldering or mis-used by user.
the ear piece 2.5mm jack will be spoilt when frequently used and headset unplugging from device. when faulty, the device will think that the headset is still inserted & do not project the sound out during a call from normal hearing speaker (user can only use bluetooth headset to do calls) the mic will not work too if loudspeaker mode is on.
my 2cents, find someone skilled to replace them if they still can find the component in market & u think its worth servicing or buy another model.
hey!
i got myself a used TG01 but it didnt came with a usb host cable, so i decided to use a gender changer and the data cable to connect the peripherals to my phone, but it did not work...it does not recognize anything, am i doing something wrong ? or cant it be connected with anything else then the usb host cable provided?
thanks!!
mordockcs said:
hey!
i got myself a used TG01 but it didnt came with a usb host cable, so i decided to use a gender changer and the data cable to connect the peripherals to my phone, but it did not work...it does not recognize anything, am i doing something wrong ? or cant it be connected with anything else then the usb host cable provided?
thanks!!
Click to expand...
Click to collapse
it's a generic micro USB cable, you can find it at NOkia or HTC store
thanks for the reply, i already made some research and found out that the host cable is in fact a special cable that has 2 wires grounded on the micro usb side.
i actually was able to make one, but it must have broke a soldering point and if i connect it, it drains my battery in 10 minutes...
after the failure i just brought one out of ebay.
regards!
BTW: i encountered and other problem...
i had 2 micro USB cables, and i destroyed 1 to make the host cable, they looked the same so i picked one at random, now the phone wont change with this cable with the ac adapter connected i have to connect it to the PC to that it can receive power.
I tested with an other cable and it worked...has anyone experienced this?
I made one using an old USB extension cable. It took about 10 mins. Short the green and white wires on the female side of the USB cable. Now will use any normal in-car charger.
mordockcs said:
thanks for the reply, i already made some research and found out that the host cable is in fact a special cable that has 2 wires grounded on the micro usb side.
i actually was able to make one, but it must have broke a soldering point and if i connect it, it drains my battery in 10 minutes...
after the failure i just brought one out of ebay.
regards!
BTW: i encountered and other problem...
i had 2 micro USB cables, and i destroyed 1 to make the host cable, they looked the same so i picked one at random, now the phone wont change with this cable with the ac adapter connected i have to connect it to the PC to that it can receive power.
I tested with an other cable and it worked...has anyone experienced this?
Click to expand...
Click to collapse
you have to have a short on the 2 data wires for it to charge.
If you are traveling and need to use GPS, but maps are loaded on a external card and you have your viewpad charging on lighter outlet.
or (my case) you have some serious amount of text to write and you need the keyboard connected as well as your wall mount charger....
Is there any known way to connect the battery charger and a peripheral as keyboard or usb mass storage device at the same time?
I'm thinking about some surgery to the usb-to-miniusb converter that I use to connect my desktop type keyboard to the viewpad, but don't know what could happen to the usb device or the keyboard. Neither know which of the 5 pins (contacts) of the charger is the active one...
Any suggestions?
Tnx in advance.
anothe question....
Ok... since there is no answer over 24hrs, I'll make another question to make this a little more interesting for you people could help me...
Is there any chance to connect a keyboard (already working) plus a SD card at the same time??
I'm making some fun stuff with a keyboard and making some surgery I could install some kind of "external USB Port" on the keyboard.... but, should it work?? I mean, keyboard and flash memory together, connected to one-single miniUSB port....
Developers.... any suggestion??
Thnx again...
Forgett to say.... on Viewpad7 with FROYO 2.2.1
Another idea
Ok, easy people... That bunch of comments about my topic make s me feel kind dizzy...
Just kidding....
Making some research (on goggle, haha!!), I've found that USB port on a pc have a 5volt-500mA output... So, if that's nominal out and that power could charge the viewpad AND don't turn on smoke any peripheral, Then I just have to connect power out on a wall-mount charger to the 1st pin (wire) of a 5 contact miniUSB, regarding on the power out put on 500mA.
(thanks isIran for your assistance )
now... PLEASE SOMEONE STOP ME IF I'M HAVING SOME IDIOTIC, TABLET BRICKING, IDEA!!!!
Thnx again
Hi,
The Viewpad wall charger have a non standard conector, if you look in the contact part you will see double connection.
In the main charger body you will find the pinout:
Pin 1 & 6 +, pin 5 & 10 -
These pins (6&10) are longer than the data pins to ensure that the power connections mate first and un-mate last.
The wall charger is 2 A and the USB PC port only 0.5A (0.9A for USB3)
For this reason a wall charger change in 2 hours and a PC USB in 15 hours.
A dedicated USB charger should short the 2 data lines together. The device will then not attempt to transmit or receive data, but can draw up to 1.8A
for this reason the device know when it's connected to a computer or to a dedicated charger (like a Garmin GPS)
Probably modifiying a connector (or keyboard) to provide energy and data will work.
Did you try a USB hub?
Less us know the result of your experience.
cheers
You could solve the keyboard problem by using a bluetooth keyboard and you can charge the tab on the USB port at the same time.
ecossais said:
You could solve the keyboard problem by using a bluetooth keyboard and you can charge the tab on the USB port at the same time.
Click to expand...
Click to collapse
Right, this solve one problem, but is much expensive and less fun... Besides, didn't solve the flash drive plus charger issue...
About pins 6 &10... Just noticed that (in over a year never look that closer the charger pin).
I'll try usb hub, but I'm afraid to burn some flash drive or worst...
Thanx for your interest and helpful advice...
Hi, is there any way to diagnose and fix USB connector problem?
It stops recognizing external connected devises and when charging you need to find a certain position of the charging cable connector to start charging.
Not a cable or charger issue, also cleaned it up with air and using youtube recommendations for cleaning USB type C.
Sometimes the dust are gathering in the connector. The compressed air could be not enough. Try to use not iron needle if you see something inside.
First off the biggest problem is the damaged USB port. I got the phone from my little brother in this condition and want to use it as a screen for Klipper. I soldered two wires for charging on the traces of the USB-C Port PCB so data transfer using USB isn't possible anymore. Because I don't want to turn the phone on manually every single time I wanted it to start automaticly when it's charging. The missing USB port causes all the problems as all guides I found are based on some kind of computerassisted install. Therefore I'd be really happy if someone could guide me through this mess and potentially also help others