Thread: Soldering advice needed for re-attaching N900 USB to mainboard.
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stickymick is offline stickymick
2011-04-25 , 13:18
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#67
Originally Posted by lazart View Post
That's my problem, too. Filesystem errors on root, some apps don't work anymore, can't open the contact list. I have to reflash!

There are debug ports, also for USB. But I couldn't get a working connection with them, yet. I tried with Data+, Data- and GND.
I'm not assured this is really USB. Maybe I'll have a look at the schematics/PCB

edit: I've found J5300 and J5301 in the schematic and the PCB, these are described as USB D+ and D- in the schematic.

Seems like another way for a USB connection, without soldering on components again
I think you could be onto something with those 2 pads. If you look under your battery they are accessible through a hole in the shielding, as are the 7 & 5 pin pads. I'm thinking they are there to be used by a service centre for the purpose of flashing etc.

A quick search for "Nokia N900 flashing cable" got this http://ditsonline.com/3385-nokia-n90...ufs-7-pin.html. If you look at the full size image you can see there's 7 spring loaded pins on the box. This thing fits inside the battery compartment and the pins contact one of the sets of pads.
There's gotta be something out there that makes use of those two USB pads.
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