Filter Replacement » History » Revision 8
Revision 7 (Anonymous, 02/19/2016 10:48 PM) → Revision 8/12 (stuge, 02/19/2016 10:48 PM)
== Motorola filter replacement == To replace filters on Motorola phones you will need: * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=HHM1526 HHM1526] * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=HHM1523C1 HHM1523C1] * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=04025A150JAT2A 04025A150JAT2A] * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=04025A220JAT2A 04025A220JAT2A] As the shipping cost for such a small-quantity order is relatively high, a complete component kit is available for online order from http://shop.sysmocom.de/products/osmocombb-filter-kit === Remove existing baluns === First you will need to remove existing balun: [[Image(motorola_filter_replacement_step_1_low.jpg, 250px)]] [[Image(motorola_filter_replacement_step_2_low.jpg, 250px)]] === Solder new baluns === Clean up the phone and solder HHM1526 and HHM1523C1 on the right places (the black dot goes up): [[Image(motorola_filter_replacement_step_3_low.jpg, 250px)]] [[Image(motorola_filter_replacement_step_4_low.jpg, 250px)]] [[Image(motorola_filter_replacement_step_5_low.jpg, 250px)]] === Solder ceramic capacitors === Last step is to solder ceramic capacitors 04025A150JAT2A and 04025A220JAT2A: [[Image(motorola_filter_replacement_step_6_low.jpg, 250px)]] [[Image(motorola_filter_replacement_step_7_low.jpg, 250px)]] === Credits === Thanks to [http://246tnt.com/gsm/rx_filter.html Sylvain] Sylvain and Peter who made this possible.
