Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

You just reminded me. Used to use that stuff too when repairing broken tracks and worn contact pads in quartz watches.

Like the humor that's been interjected into that guide though. ;)

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

First, excuse me if this is considered crossposting.
Though, I discovered that you can use the pads beneath the battery to actually gain access to the USB and charge your device.
I describe this in more detail here:
http://talk.maemo.org/showthread.php...818#post997818

I just mention it here as it may be of interest for you as well.
I didn't post it here as this thread is about fixing/re-attaching the existing USB to the mainboard instead of using an alternative method.
So imho all stuff about creating an alternative way for charging or getting access to the USB should go into the other thread linked above.

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

are there fuses for the 5v wire?? i tried to fix my n900 by myself an had everything soldered together but usb was not regognised.... BUT

when i use a cutoff usb cable and short the Data wires it boots when i put in a battery ... that means the data pins are correct soldered ...

but i have connection with gnd and +5v (from cut off usb cable to testpoints on the pcb) too.

that means:

the usb is soldered it correctly.

data wires are regognised

issue could be an fuse...

i never saw an fused gnd

so it must be a fuse somewhere on +5v...
or an broken USB cotroller.

someone know where the fuses are??
how can i test the usb controller??

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

there is a fuse on USB VBus 5V, directly after the microUSB socket. That part is called "F5300". You'll find it in the "N900 RX-51 Full Schematics", page "GAIA_05" and "Rover_Component_Finder" pdf.

I also want to test USB connectivity, I think also USB power is required. As I mentioned before I couldn't get an USB connection with just the two data pads.

A fuse can be shorted, when you know what you do after that! I broke a fuse in my old N810, when I inverted 5V and GND accidently..

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

The pictures from http://talk.maemo.org/showpost.php?p...3&postcount=12 that a lot of people seem to refer to are no longer available. If primo still watches the thread, could you put them back up or has anyone else similar pictures?

Thanks

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

Sorry. I did a cleanup on the server and noticed that I removed too much. Pictures came back:)

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

oMFG my usb broke again :( F***********

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

Just wondering, did you file down the microUSB connectors on your data cable and charger?

PS: I'm a fellow Hamiltonian BTW! I'm travelling in Asia for the next few months.

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

I tried to soldering it back on but my soldering is too big to fit in the small space. I can only mount the ground.I'm guessing sending it again for repair.

Fuc* put it back in and my screen gone funny turned it off and turned it back on it back to normal again.. Pewff

Re: Soldering advice needed for re-attaching N900 USB to mainboard.
 

Good news guys. I have successfully reattached the MicroUBS back onto N900 board with a soldering iron.

It's charging and accepting data transfer. :)
Cost $59.95 for a soldering iron and hours of works. lol.
Photos are up soon.