CHAPTER 3
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COPYRIGHT
2000 CANON INC. CANOSCAN N650U/N656U/N1220U REV.0 JUNE 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
Figure 3-12
III. OPTICAL SYSTEM
A. Contact Image Sensor
1. Removing the contact image sensor
Note: Take care not to touch the phototransistor of the contact image sensor.
1) Remove the document cover.
2) Remove the document glass unit.
3) Remove the seal from the back of the scanner unit, push the wire stopper backward to
remove it from the base frame through the left hole as shown in Figure 3-6.
4) Remove two spacers on both ends of the contact image sensor.
5) Lift the drive unit end part, then remove the drive wire from the gear.
6) Move the drive unit to the center.
7) Hold up the front of the contact image sensor, slide it to the right, then lift it to remove.
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