TSI Instruments Aerotrak 9303 - Page 75

General Maintenance–Model 7301-P 4-15
3. Disconnect all cables between the optics chamber and the main
board as shown in the photo below.
4. The optics
chamber can now
be accessed for
cleaning and
replacing the
mirror/laser diode.
At this point, the
optics chamber
can be completely
separated from
the main board.