Canon i-SENSYS MF4120, Service Manual

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Chapter 3
3-3
7) Unhook the 1 claw [1], and remove the gear [3] with the belt [2].
F-3-8
8) Remove the 3 screws [1] to remove the shaft retainer [2], the grounding
plate [3] and the motor unit [4].
F-3-9
9) Remove the 2 screws [1] to remove the flat bed motor [2].
F-3-10
3.2.3 Contact Sensor
3.2.3.1 Removing the Contact Sensor
0014-5962
i-SENSYS MF4150 / i-SENSYS MF4140 / i-SENSYS MF4120 /
1) Open the copyboard glass cover [1] and detach it upward.
Pull out the hinge [2] on the left side while tilting it toward the rear side.
Be sure to put the copyboard glass cover that you detached onto the mount
etc., so as not to damage the cable.
2) Remove the 4 screws [3], and detach the copyboard glass cover [4].
3) Remove the copyboard glass cover [5].
Be sure not to get the bottom surface of the scanner glass soiled.
F-3-11
4) Remove the 2 spacers [1].
5) Remove the contact sensor unit [2] upward.
F-3-12
Points to Note at Attaching
Be sure to fit the gear [1] of the belt with the gear [2] on the bottom surface
of the contact sensor unit.
F-3-13
6) Disconnect the connector [1].
F-3-14
7) Turn the contact sensor [1] in the direction shown by the arrow, remove
the 2 shafts [2], and then remove the contact sensor [1].