A man controls a large equipment board.
A man is focusing on his job.
Just because he is focusing on a board does not mean it is his job to do so.  He could be a performer or owner of the property checking someone else's work, or even an interested fan.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_control(e1) & n_board(x2) & of(x2,x3) & n_equipment(x3) & a_large(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_job(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_focus(e1) & n_man(x1))