Re: Lenovo V110-15ISK schematics



Ok, although I solved my problem using the web cam, I'm very interested on the technique to discover the short source, withou using an electronic schema (don't have one for this laptop). Can you still provide me the practical "theory" behind the technique you have in your mind, please ? You told me to measure the impedances, ok I don't have the laptop anymore, I returned it to the owner, but can you continue please ? After telling you the impedance what would have been next ?...

Re: Lenovo V110-15ISK schematics

So, I fixed the usb by sacrificing the integrated web camera. Took the camera, cut the cable, identified the power and ground lines + data +/- (always twisted wires), ignored other two, found an unused space on the MB to place a new usb port, soldered the wires, cut the plastic cover of the laptop to support for the new usb port, and it was done. An usb 2.0 port, with something like 3.3 V instead of 5.0V (last measure) but it seems it supports a mouse and/or an usb memory flash.

Thanks for the advices though, I'm sorry it didn't worked...

Re: Lenovo V110-15ISK schematics



This is what actually hapenned, the laptop is used in a school and I'm the IT guy. Someone actually broke the usb port plastic, tried another pass, bended the metalic pins, touched them together, short circuit, pufff.
I'm merely an electronics beninner, but I have willing to learn on a practical way. So I wanted to fix this, I dissasembled the laptop and looked at the mb, only the U3601 piece was visible fried. I removed it from the board, and because the damaged usb port was hard for me to remove, I broke it's pins in short...

Re: Lenovo V110-15ISK schematics



Thanks for so fast replying anshad.
I tried to do what you told me, but I guess I additionally have a big short somewhere on the board, since all the usb port pins are shorted together, with also 3 pins from the U3601 piece.

Anyways, I tested out the card-reader and it works. Could I use the card-reader to restore an usb port on the usb hub ? Should that be easy somehow ? I'm guessing there is the card-reader controller, and then on some outputs from there should arrive as inputs to some usb controller IC, but...

Re: Lenovo V110-15ISK schematics

I need to know what electronic piece is U3601, it is related to tthe two usb ports, one of those shortcircuited and u3601 fried. Please help !