Canon NEW F-1 Service Manual page 41

4. 2nd Curtain Latch Adjustment
4.1 Unsolder the data back direct contact and run keton (MEK) in around it.
4.2 Push the contact out from the inside.
4.3 Push on the armature lever and check the latch mesh. (Fig. 1)
4.4 Adjust the overlap to the limit shown in figure 2.
4.5 Stake the setscrews with Arontite R.
4.6 Apply Astro-oil to the latch surface.
5. 2nd Curtain Latch Operatic Check
5.1 In the wound condition the separation of the armature lever and drive lever is
0.2mm or more. (Fig. 3)
5.2 At all times during winding there must be some separation between the levers, and
between the armature lever and spring hanger screw. (Fig. 4)
5.3 If the above conditions are not met, bend the drive lever.
Canon NEW F-1 Service manual
Assembly and Adjustment Notes
Page 41