Olympus OM-1 Repair Manual page 57

C-10
Major Check
nt
Relative Function
(1) Mirror
movement
(2) Mirror
position
Checking Method or.
Points of Special Attention
Upon shutter relea se,the mirror
should be raised accurately, and after
shutter opening and closure,it should
be lowered.
The mirror should make a smooth
operation (without hesitation and
unusual sound).
When the mirror is raised by the
MU knob, the edge of the mirror
should be in contact with the
damper and press it.
Upon shutter release by B or at
any slow speed, the mirror should
be completely out of the picture
frame during exposure but stay at
the upper edge of the frame.
11. FX Knob
(CA8896)
12. Self-timer
1) The FX knob should operate smoothly
and with accuracy.
1) There should be no tolerance of the
setting lever either in the direction
of rotation or back and forth, when
it is not in the "set" position.
2) It should be properly set and stay
in such a position until released.
3) Setting should be performed without
heavy frictions, extreme uneven
feeling or squeaks, but smoothly.
4) Upon setting of the self-timer, the
setting lever alone will return to
its original position smoothly with
proper friction but without staggering
by self-weight.