Polaroid 636 Repair Manual page 12

7. When the photocell sees 100% of the light needed for the exposure, the camera electronics
orders the flash to quench and the solenoid to energize. The solenoid then pulls the blades
closed.
8. After the blades close, the motor is turned on, activating a gear drive system similar to the
system in the OneStep. The timing gear:
advances the pick
indexes the counter
brings the S5 actuator back to its original position.
The solenoid deenergizes and the shutter system is again latched closed, ending the fill-
flash sequence.
6