Trying to fix a board that had a SMD inductor. it was labeled L1 on the silk and there was no marking on the part, and I have no schematics. ...or there may have been markings, but someone tried to fix the board before me and plastered the thing on solder. no way I can salvage that part... pic included at the for laughs. (the only part I could read the labeling was R3. probably because it is the less dense than solder so it floated :)
[L1 is right next to C6 there on the right. under that unsightly blob of solder.]
It is used on V+ from the broken USB connector, and then goes to those Resistors/Caps on the right side of the picture and then to the ICs.
I'm going to solder wires and trhu holes compoenents to substitute the damaged ones (because I have nothing SMD here)
Can I just bypass that if I use a USB cable with a ferrite core? ... I confess I'm not really sure what a SMD inductor does there. I always assumed USB had a standard frequency on the power line. is that not the case?
Edit: found the schematics for the USB chip this board uses. The inductor is the one marked L1 on the evaluation board. http://www.nxp.com/documents/user_manual/D12PCKitMan.pdf there is not spec there. BOM just says "ferrite bead"