Thread: Soldering advice needed for re-attaching N900 USB to mainboard.
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lazart is offline lazart
2011-05-01 , 19:34
Posts: 99 | Thanked: 64 times | Joined on Jun 2009 @ Stuttgart/Germany
#74
Originally Posted by ~phoenix~ View Post
are there fuses for the 5v wire??
...
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??
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..
 

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