TSI Instruments Aerotrak 9303 - CHAPTER 5 Maintenance; Maintenance Schedule; Zero Check; Cleaning the Instrument Enclosure

General Maintenance–Model 9303 2-19
4. Remove main board from the Model 9303.
5. Plug cable connections in to J1, J3, J7, and J10 (see step 3 above).
6. Connect the display and keypad. Keep case open.
7. Power on the unit.