Canon NP6412 Service Manual page 440

CHAPTER 2 STANDARDS AND ADJUSTMENTS
4) Turn the cable drive pulley [3] so that the three shafts [2] of the mirror positioning tool for the
front and the rear may be arranged as shown.
2-4
[2]
Figure 2-5 (rear)
[2]
Figure 2-6 (front)
[3]
[2]
[2]