Brother LT2699001 Registration Sensor PCB Assembly is a printer sensor board used in the engine section of the printer. It is a replacement component for servicing the registration sensing assembly.
The parts list identifies it for the Brother MFC-J6520DW, MFC-J6720DW, MFC-J6920DW and MFC-J6925DW printer models. Its exact part number is LT2699001, which helps distinguish this board from other sensor PCBs in the same assembly list.