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.
Related
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
My photon comes contact with some water which insert into the micro usb and micro hdmi ports.
Now both of them with corrosion.
The first thing I've made is to turn it off, pull off battery and sim card, dry it and put it into a rice box.
The device has seems works fine before I've turn it off, maybe only these usb and hdmi ports has screwed up.
I found a cheap usb port for it but didnt find any hdmi port....
There is any guide or something how to replace the usb port?
is it hard to do it/needs soldering or something?
Any other tips before I turn the device on? (How many hours/days it should be closed in the rice box?)
Thanks.
Hi,
Does anyone has any idea why the micro-USB connectors which are used to connect a HDMI or VGA cable to the micro-USB port of the Samsung Galaxies are longer than let's say a data micro USB connector?
I've tried a micro-USB extension cable, and they don't work with these video-output connectors because they're too long. When I looked inside the connector I noticed that all the connection points are way down the connector, and that the upper part is just extra. So I've tried filing off the upper part. Now it charges the phone, but still no video output.
Thanks!
Never mind, just found an answer to my question
Apparently the dock / video out connectors are 11 pin micro USB connectors. The data and charging cable connectors are 5 pin.
Now to find an extension cable for that. I wonder if this excists.
It would be much easier to find HDMI/VGA extension cable rather then the 11 ping micro usb.
golalmo said:
It would be much easier to find HDMI/VGA extension cable rather then the 11 ping micro usb.
Click to expand...
Click to collapse
Indeed, but the problem is that I want to extend the dock connector so I can put my Note 3 next to my dock to put it in landscape.
I can confirm that the Lecco USB-A to USB-C cords are of good quality free from soldering defects etc.
My non-charging symptoms are that the phone starts to charge and then stops charging, The USB cord works fine for file transfer
End to end connectivity of the cable is fine, The USB-A end connectivity to the charger on the (+Ve, Gnd, D+ D-) is intact.
There is a inline Fuse which was intact
A IR1 designated diode or resistor ? in the USB-C end .. It was open circuit ? I will work up a diagram when my eyes recover
I cannot confirm the contacts that the USB-C makes with the phone BUT the fingers all look fine. !
Mine is marked with the "Le" logo on one side, so it's easy to remember the side which you mention about. I had no problems with the cable and I never cared about the side of USB-A that I plug in.
Still, a good point though.
valy_cta said:
Mine is marked with the "Le" logo on one side, so it's easy to remember the side which you mention about. I had no problems with the cable and I never cared about the side of USB-A that I plug in.
Still, a good point though.
Click to expand...
Click to collapse
Yes mine has the logo as well, I concluded this possible cause for failure because its so easy to plug in reversed ? I will open the connector in the next few days to hopefully show where the failure occurs .
I've just compared the USB-A male from the OEM cable with another regular male port and I see that LeEco did a good job with it. The middle part is very thin and positioned very well. By plugging it into a female port and even reversing it, I haven't noticed any flexing of the middle part either way (I've watched it through the 2 small holes that keep the male port attached). There should be some movement, but I think it's too small to be noticed.
Anyhow, I'm looking forward to your disassembly of the connector.
valy_cta said:
I've just compared the USB-A male from the OEM cable with another regular male port and I see that LeEco did a good job with it. The middle part is very thin and positioned very well. By plugging it into a female port and even reversing it, I haven't noticed any flexing of the middle part either way (I've watched it through the 2 small holes that keep the male port attached). There should be some movement, but I think it's too small to be noticed.
Anyhow, I'm looking forward to your disassembly of the connector.
Click to expand...
Click to collapse
Scratch that theory ! Indeed the Lecco USB-A end is robust and NOT the problem ?! All wires to Pins test out ok.
I will need to investigate the USB-C end or the cable !
cheers
Thanks for the teardown.
I do agree that too many people were complaining about the cable that somehow it stopped charging, so there should be a weak point. Most of them reported failure within the first week or so, this makes me believe that it should be some bad soldering somewhere. It just needs few flexes and it's broken. I do suspect the junctions at the plugs either side.
Some safety precautions:
- Never remove the charger out of the socket by pulling the cable
- Never remove the cable out of the USB port (either side) by pulling the cable, pull it from the plug
- Whenever you are carrying the charger in a bag, remove the cable from the USB port
- When not in use, spin the cable to form a small coil of about 10cm in diameter (very subjective, the point is not to form an angle that might damage it; a 90 degree angle when caught between the drawers, etc)
PS: Was you cable broken or something?
valy_cta said:
Thanks for the teardown.
I do agree that too many people were complaining about the cable that somehow it stopped charging, so there should be a weak point. Most of them reported failure within the first week or so, this makes me believe that it should be some bad soldering somewhere. It just needs few flexes and it's broken. I do suspect the junctions at the plugs either side.
Some safety precautions:
- Never remove the charger out of the socket by pulling the cable
- Never remove the cable out of the USB port (either side) by pulling the cable, pull it from the plug
- Whenever you are carrying the charger in a bag, remove the cable from the USB port
- When not in use, spin the cable to form a small coil of about 10cm in diameter (very subjective, the point is not to form an angle that might damage it; a 90 degree angle when caught between the drawers, etc)
PS: Was you cable broken or something?
Click to expand...
Click to collapse
I can confirm that the soldering and the wire quality are top notch, End to end connectivity is good!
At the USB-C end there is a fuse inline with the +VE (Red wires) intact in my case, and a IR1 Zener diode (I think) , Or a resistor ?
Its open circuit ! (they normally go closed circuit ?) I have noticed sometimes plugging in the Power pack that the mains pins will give a little spark ?
So maybe that has blown the Diode ? IE Plugging in the powerpack with the cord attached might not be advisable ?
I have yet to work out the wiring .... of the IR1 diode / resistor ?
The only thing I cannot confirm is the contact made by the USB-C fingers onto the Phone connector..... I won't be doing any more.
Replacement cords are cheap
My cable is fine but I have a problem with my charger. It charges fine once, but having been disconnected (even midway through charging) it won't work again for at least a day. After about a day it generally works again, but again only one time. Very strange and annoying.
In Germany we have a couple of guys complaining about the Leeco OEM cable too. But if I remember correct these guys had a different kind of cable in their package.
USB-C to USB-C instead of the USB-A to USB-C variant.
That seems to be the case for people who had buying the phone from banggood with shipping from Europe direct.
Maybe there's another manufacturer of the cable with a bad soldering standard!?
My girlfriend and myself were both receiving​ our Max 2 with the USB-A to USB-C variant of the cable about nearly 5 Month ago and no issues so far!
USB-C to USB-C should be the way of the future for everything !
My cord had been working fine for 6 months, never unplugged from the charger, never rolled, never damaged.
It just went faulty after I had transferred files from my PC to the phone for a rom upgrade etc that the problem occurred.
Just coincidental ! ?
I tried to hook up a game controller via the OTG adapter and it appears to not send any power out from it. Even with a USB thumb drive and other USB C adapters, nothing seems to work. Has anyone else noticed this? You can transfer data via the cable just fine, but I find it strange it doesn't send any power through the plug.
Have you tried connecting it the other way round?
tomixnscale89 said:
I tried to hook up a game controller via the OTG adapter and it appears to not send any power out from it. Even with a USB thumb drive and other USB C adapters, nothing seems to work. Has anyone else noticed this? You can transfer data via the cable just fine, but I find it strange it doesn't send any power through the plug.
Click to expand...
Click to collapse
I noticed the same thing. I believe it's because once it comes out the other side with the 5-pin adapter, it is then reduced to the old micro-usb specification, which uses 5 wires. True USB-C connection has like 20 or 24 pins. I was able to get a couple very basic OTG of things to work, like a mouse and a thumb drive. BUT HERE IS THE CATCH - The mag connector has 5 pins, reduced from 20-some on the C connection.. so true USB-C connection is no longer possible once you get on the other side of the connector. So the trick is to NOT use a USB-C OTG when it's in the case with magnetic adapter. You must use a Micro USB OTG with a Micro-to-C adapter attached to that. Even so, not everything worked just by sticking on the Micro-to-C adapter.. Mouse and a thumb drive worked, but my ethernet adapter and VGA/HML/HDMI adapters did not. Out of the case, I can use my USB-C to HDMI cable to display on my TV. But same cord does not work with the magnetic adapter with the case. It is simply not possible because the reduction of contact pins from phone to case to magnet.. One more thing to consider, if you're trying to do anything other than charging, make sure the magnet is on the right way.. there's a little logo it should be in the front.
If I can come across a spare or broken Dual Screen case, I'd be curious to take it apart and see if it would be possible to rig it up with a better plug for the case.. find which wires go to the workings of the DS and leave them intact, but then try to replace the magnetic pins with a female C plug that has all the contacts intact still..
Seymour_Asses said:
I noticed the same thing. I believe it's because once it comes out the other side with the 5-pin adapter, it is then reduced to the old micro-usb specification, which uses 5 wires. True USB-C connection has like 20 or 24 pins. I was able to get a couple very basic OTG of things to work, like a mouse and a thumb drive. BUT HERE IS THE CATCH - The mag connector has 5 pins, reduced from 20-some on the C connection.. so true USB-C connection is no longer possible once you get on the other side of the connector. So the trick is to NOT use a USB-C OTG when it's in the case with magnetic adapter. You must use a Micro USB OTG with a Micro-to-C adapter attached to that. Even so, not everything worked just by sticking on the Micro-to-C adapter.. Mouse and a thumb drive worked, but my ethernet adapter and VGA/HML/HDMI adapters did not. Out of the case, I can use my USB-C to HDMI cable to display on my TV. But same cord does not work with the magnetic adapter with the case. It is simply not possible because the reduction of contact pins from phone to case to magnet.. One more thing to consider, if you're trying to do anything other than charging, make sure the magnet is on the right way.. there's a little logo it should be in the front.
If I can come across a spare or broken Dual Screen case, I'd be curious to take it apart and see if it would be possible to rig it up with a better plug for the case.. find which wires go to the workings of the DS and leave them intact, but then try to replace the magnetic pins with a female C plug that has all the contacts intact still..
Click to expand...
Click to collapse
Thank you @Seymour_Asses ! I saw here https://twitter.com/konic0s/status/1202966945693220865 that LG G8X supports USB-C to HDMI adapters but I didn't know if it also worked with the Dual Screen case but now I know it doesn't, thanks for the information, very helpful ! :good:
BTW I think that when you connect the Dual Screen case to the G8X it uses the dedicated USB-C high speed pins of the G8X for video-out so these pins are not available anymore for other HDMI out, I'm not sure about it and don't have any proofs but it seems you are right about not enough pins on the mag connector.
If i remember correctly, the manual states that most USB-C functions wont work though the dual screen case. I think there was some speculation that its due to most of that bandwidth being used for the second screen.
Quite simple: the Mag USB-C adapter is for charging only. It drives me mad as i have a professional USB-C headphone that I use for conferencing.
But I understand the reason: when in dual screen, the USB-C data connection is in use dor the second screen, enabling the USB-C connection beyond that requires a hub to be built in the case "before" the DS connection (so it wont work building it in the dongle itself).
I wish LG went with a Pogo connector on the bottom or on the side to activate the DS case. This would have made the chin slimmer and freed up the USB-C port.
Anyway, it is what it is now, and i will not trade my LG G8x DS for anything at the moment... Until maybe that Surface Duo phone for which I might need to sell a vital organ ?