Canon MF720 Series, Service Manual, Page: 159 / 327

5. ADF geometric adjustment
1. On an image copied using the ADF, check the non-
image width in the X and Y directions and the
expansion/contraction in the X direction.
In the case of E353MGMH, perform 2-sided
original reading from the ADF.
If adjustment is needed, enter necessary
adjustment values in the following service mode:
• COPIER > ADJUST > ADJ-XY > ADJ-Y-DF
(Adj img pstn in ADF mode:horz scan)
• FEEDER > ADJUST > DOCST (Fine
adjustment of VSYNC timing at ADF reading
[front side])
• FEEDER > ADJUST > DOCST2 (Fine
adjustment of VSYNC timing at ADF reading
[back side])
• FEEDER > ADJUST > LA-SPD (Fine
adjustment of magnification ratio in vertical
scanning direction at ADF stream reading
[front side])
• FEEDER > ADJUST > LA-SPD2 (Fine
adjustment of magnification ratio in vertical
scanning direction at ADF stream reading
[back side])
2. If you enter adjustment values, write the final
values on the service label.
Removing the Reader Scanner
Motor
■ Preparation
1. Remove the Right Cover.(Refer to “Removing the
Right Cover” on page 120 )
2. Remove the Left Cover.(Refer to “Removing the Left
Cover” on page 118 )
3. Remove the ADF Unit + Reader Unit.(Refer to
“Removing the ADF Unit + Reader Unit” on page
130
)
4. Separate the ADF Unit from the Reader Unit.(Refer
to “Separating the ADF Unit + Reader Unit” on page
131 )
5. Remove the Reader Unit Upper Cover Unit.(Refer to
“Removing the Reader Unit Upper Cover” on page
144
)
■ Procedure
1. Free the harness [2] while holding the Reader Unit
[1].
• 1 Connector [3]
• 3 Harness Guides at the [A] location
CAUTION:
To prevent parts on the top side of the Reader Unit, do
not tip the Reader Unit [1] into the perpendicular
position.
[3] [2]
[A]
[1]
3x
1x
2. Pull the Drive Belt [1] to move the CIS Unit [2].
4. Disassembly/Assembly
151