Filter Replacement » History » Version 10
nion, 02/19/2016 10:48 PM
1 | 1 | == Motorola filter replacement == |
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3 | 10 | nion | In order to use the phone as a passive uplink sniffer, you will have to remove and replace the RX filters. |
4 | 9 | nion | |
5 | 1 | To replace filters on Motorola phones you will need: |
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7 | * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=HHM1526 HHM1526] |
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8 | * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=HHM1523C1 HHM1523C1] |
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9 | * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=04025A150JAT2A 04025A150JAT2A] |
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10 | * [http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=04025A220JAT2A 04025A220JAT2A] |
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12 | 6 | As the shipping cost for such a small-quantity order is relatively high, a complete component kit is |
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13 | available for online order from http://shop.sysmocom.de/products/osmocombb-filter-kit |
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14 | 5 | laforge | |
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16 | 2 | === Remove existing baluns === |
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18 | First you will need to remove existing balun: |
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20 | [[Image(motorola_filter_replacement_step_1_low.jpg, 250px)]] |
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21 | [[Image(motorola_filter_replacement_step_2_low.jpg, 250px)]] |
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22 | |||
23 | === Solder new baluns === |
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25 | Clean up the phone and solder HHM1526 and HHM1523C1 on the right places (the black dot goes up): |
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26 | |||
27 | [[Image(motorola_filter_replacement_step_3_low.jpg, 250px)]] |
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28 | [[Image(motorola_filter_replacement_step_4_low.jpg, 250px)]] |
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29 | [[Image(motorola_filter_replacement_step_5_low.jpg, 250px)]] |
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31 | 3 | === Solder ceramic capacitors === |
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33 | 4 | Last step is to solder ceramic capacitors 04025A150JAT2A and 04025A220JAT2A: |
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34 | 2 | ||
35 | [[Image(motorola_filter_replacement_step_6_low.jpg, 250px)]] |
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36 | [[Image(motorola_filter_replacement_step_7_low.jpg, 250px)]] |
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37 | |||
38 | === Credits === |
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40 | 8 | stuge | Thanks to [http://246tnt.com/gsm/rx_filter.html Sylvain] and Peter who made this possible. |