Canon NP6317 Service Handbook page 20

CHAPTER 2 STANDARDS AND ADJUSTMENT
8. No. 4/5 Mirror Mount
The screws [A] that keeps the No. 4/5 mirror mount [1] to the lens base plate must not be
loosened in the field. If they are loosened, readjusting the mirror mechanical axis is not possible in
the filed.
9. Adjusting the Tension of the Belt
The main motor drives the drum via a timing belt.
Adjust the tension of the belt by selecting the mounting hole of the main motor so that when the
center of the timing belt is pushed down with a force of 500g, the distance between the two runs of
the belt is between 20 and 25 mm.
2-10
[1]
[A]
Figure 2-14
Main motor mounting holes
Tension decreases
Spring scal
500g
Belt
Drum drive unit
Figure 2-15
[A]
[A]
Tension Increases
Main motor