3.4 4TH/5TH MIRROR DRIVE
The 4th/5th mirror drive motor [A] (stepper motor) changes the 4th/5th mirror
assembly position through the pinion gears [B] and the rack gear [C] in
accordance with the selected reproduction ratio to provide the proper optical
distance between the lens and drum surface.
The home position of the 4th/5th mirror assembly is detected by a home
position sensor [D]. The main board keeps track of the lens position based on
the number of pulses sent to the 4th/5th mirror motor.
[D]
[C]
[B]
[A]
A219D510.wmf
Detailed
Descriptions
20 December 1996 OPTICS
2-9
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