10/12/13
TTU-12x0 Hardware & Installation Guide - PULS Wiki
https://puls.calamp.com/wiki/TTU-12x0_Hardware_%26_Installation_Guide
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The following instructions should be used when attempting to access the SIM in a GSM TTU-12x0™.
1. Remove the top plate of the TTU-12x0™. The TTU-12x0™’s enclosure is held together by 4 plastic clips. To
remove the cover, squeeze the top plate of the LMU approximately ½” from the end of the TTU and approximately 1”
from the front (i.e. the end with the cables).
LMU-12x0™ Clip locations
2. Remove the top-plate to expose the top-side of the TTU-12x0™’s main-board.
3. Remove the main-board from the TTU-12x0™’s bottom plate and turn it over. The SIM carrier is located on the
bottom side. Take care not to touch the GPS Patch antenna.
TTU-12x0™ SIM Alignment
4. Align the SIM so that the contacts will face into the main board and the notch is aligned to the SIM Carrier.
5. Insert the SIM.
