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2-14
actuator disk , timing
cam
and so on,
return tothe
starting position.
ay
|
"time'' measured
by the electronic
circuit
6—7
"time'! to be exposed on the picture frame
Safety system
If the electromagnet
does not hold the armature
of the 2nd curtain
actuator
because
of a low battery or faulty circuit,
the actuator
in wro-
ng position checks
the rotation of the mirror
coupler
cam
on its way to
the point where
the cam
actuates
the timing checker
lever.
The
shutter
operation stops when the mirror
has flipped up half-way.
The shutter
mechanism
in this condition
is shown
in Fig.2-19.
If the electromagnet
holds the armature
properly, operation proce-
eds normally, since the actuator
does
not disturb the cam.
ARMATURE
2nd CURTAIN
ACTUATOR
TIMING
CHECKER
LEVER
2nd CURTAIN
CHECKER
LEVER
MIRROR
COUPLER
CAM
DIAPHRAGM
CHECKER
HOOK
2nd SELECTOR
GEAR
MIRROR
HOOK
STUD PIN FROM
lst SELECTOR
GEAR
ELECTROMAGNET
Pig.2-19
Restoring
steps
After taking the lens off the camera
body:-
1
Retrieve
the diaphragm
actuator
lever to the starting position.
2
Set the mirror
actuator
arm
to the starting position by turning it
counterclockwise
with a finger.
3
Turn the wind lever again.
Step 1 reengages
the diaphragm
checker
hook.
Step 2 reengages
the
mirror
hook.
Step 3 sets the 2nd curtain to the cocked position.
(As
the 2nd curtain checker
lever has already released the curtain when the
actuator flipped up.
The curtain is stopped by the selector gears now.
Therefore,
a rewinding
up is necessary).
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