Canon NEW F-1 Service Manual page 25

4. SW4 OFF Timing
4.1 Clean the contact surface with keton.
4.2 Slowly push the 1st curtain release lever
in the "A" direction and note where the
latch is released. Adjust the switch with
the eccentric so that SW4 goes off at 0.1
to 0.2mm additional travel.
4.3 The eccentric should be adjusted so that
longer side is toward the rear.
5. Dowel Gear Position
6. SW5 Timing
6.1 Switching Position
At a point 0.8mm from the bottom of the
stopper notch on the engagement stroke
of the stopper claw, SW5 should switch on.
1) Make sure that the stopper is not
0.8mm
from the bottom of the disengagement
stroke.
2) Check the position of the drive pin.
It is different from engagement and
disengagement.
3) Do not forget to retighten the nut after
adjustment.
6.2 As a visual check of the SW5 brush position
the edge of the pattern should be located
approximately under the midpoint of the
slope "A" of the brush.
6.3 In the wound condition, SW5 must be off and
turn on during winding.
6.4 After the check is finished, stake the nut with diabond.
Canon NEW F-1 Service manual
Adjustment Notes
At the maximum curtain travel position, and with the
camera mount toward you, the dowel should be within
0.5 teeth left to 1 tooth right of the centerline.
Page 25