Hi, On Sun, Dec 23, 2012 at 08:15:22AM +0000, Dmitry Shalnoff wrote: > thank you very much for answer and all hints and links!
BTW, the bass rework looks very similar to what i was doing, i wonder who did that :) too bad it looks like i didn't warn everyone strong enough (though i did put a big fat warning on the rework page) when i discovered the shield must be additionally insulated after the rework, i apologise for that :/ > I successfully de-solder the inductor (quick testing shows that no > resistors shorted around... as I hope) Can you share the technique you used to desolder it? > and found some analogues on farnell (same package and inductance), > but I'm not pretty sure concerning the frequency and other > parameters. Taking a closer look at the schematics and the PCF50633 datasheet i see that this inductor is part of the main step-up/step-down auto converter with an output current as big as 1.1A. It works at 1.7MHz frequency (the irc log i found appears to be unrelated). As far as i can tell that's unrelated to the self-resonance frequency of the inductor (that's always much higher for the modern parts). I'd get the one with >1.1A rated current, and on 1.7MHz all of those having self-resonant frequency of 50MHz should work decently. I do not understand much in EE though so probably you'll want some quick advice from those who really knows inductive step-up/down converters. > And just one more question (maybe to late), I didn't remove LCD before > de-soldering and now I'm slightly worry about possible damage of it. > Visually it's ok. What is your opinion? I never removed LCD too, and everything was fine. It's shielded from the heat by the PCB itself, and i doubt you could have heated it up too much. Best of luck! -- Be free, use free (http://www.gnu.org/philosophy/free-sw.html) software! mailto:fercer...@gmail.com _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community