7) Lift the lens stage t, and detach the bushing y from the rail u.Figure 3-5213. Installing the Light-Blocking Belt Mount1) Wind the light-blocking sheet w around the bobbin q while removing the slack; then,turn the bobbing mount e clockwise two to three times so that the boss on thebottom of the bobbin mount is in the hole of the belt mount. Set the bobbin, and fixit in place with the mounting screw t.Figure 3-522qwertty uCOPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 3 EXPOSURE SYSTEM3-35