Canon NP2120 Service Manual page 54

O P E R A T I O N S A N D T I M I N G
B. Lens Drive System
1.
The lens unit is driven by the lens drive motor
The lens drive motor also serves to move the
blank exposure shutter and is switched by the blank
shutter solenoid (SL4); see p. 3-37. When the blank
shutter solenoid (SL4) goes ON, the drive is trans-
mitted to the lens drive pulley to move the lens unit.
B l a n k shuner
3 - l 4
to the home position. When the lens reaches the
home position, the lens drive motor rotates in re-
verse; it then stops after the signa1 plate has left the
sensor (Qi) and a specific number of pulses has
position.
Likewise, the lens is first moved to the home po-
erations; it is then moved and positioned at a point
suited to the specified reproduction ratio.
Blank shutter d
Figure 3-12
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