Exposure Mode - Polaroid ProCam Repair Manual

S9 OPENS
Figure 1-26. Counter Opening S9 Wireform

Exposure Mode

When the Shutter Button (S10/S1) is pressed all the way down, the exposure
mode is initiated. During this mode, the Quintic lens is moved to the proper
position based on ranging information, the Shutter Blades open to the proper
aperture based on light measurements and ranging informa- tion, the Strobe fires,
film is exposed, light measurements determine when to shut down the Strobe and
close the Shutter Blades, and the film frame is processed. The following describes
how these actions take place.
Figure 1-27 shows the Quintic system in the starting condition, before an exposure
is made. The Encoder Circuit (LED and photodiode) is on, ready to start reading
Quintic lens movement. Solenoid 1 is turned on, holding the Shutter Blades closed
in readiness for Quintic movement.
CATCH PAWL
MOVING QUINTIC
SOLENOID 2
SOLENOID 1
INERTIA
WALKING BEAM
DRIVE LINK
Figure 1-27. Quintic Lens System in Starting Condition
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