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When the release button is pressed, a switch
S1 closes (Figure 1-11 A and B) and applies
operating power to the shutter. As soon as power
is applied to the shutter, solenoid #1 is energized
and rapidly moves the shutter blades to the
closed position.
When the solenoid has reached the end of its
stroke (shutter closed, it no longer requires
maximum current to hold it at that postion.
Switch S4 (located on solenoid #1) closes (CB)
and activates an electronic circuit called the
POWER DOWN CIRCUIT. This reduces power
Figure 1-11 B Operation
Figure 1-11 A Location & Arrangement of internal parts