Removing The Adf Roller Unit - Canon MF720 Series Service Manual

8. PASCAL adjustment
Enter the values shown on the label that comes with the
part in the following service mode items.
Enter the values of OFST-P-Y, OFST-P-M, OFST-P-C,
and OFST-P-K in the following service mode, and write
the entered values on the service label.
• COPIER>ADJUST>PASCAL>OFST-P-Y (Y
density adj at test print reading)
• COPIER>ADJUST>PASCAL>OFST-P-M (M
density adj at test print reading)
• COPIER>ADJUST>PASCAL>OFST-P-C (C
density adj at test print reading)
• COPIER>ADJUST>PASCAL>OFST-P-B (Bk
density adj at test print reading)
9. Copyboard geometric adjustment
Enter the values shown on the label that comes with the
part in the following service mode items.
• COPIER > ADJUST > ADJ-XY > ADJ-X (Adj of img
pstn in book mode: vert scan)
• COPIER > ADJUST > ADJ-XY > ADJ-Y (Adj of img
pstn in book mode: (horizontal scanning direction)
• COPIER > ADJUST > ADJ-XY > ADJ-X-MG (Fine
adj image ratio: vertical scanning)
Enter the values in the foregoing service mode.
10. 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 ADF Roller Unit

■ Procedure
CAUTION:
Do not touch the surface of the roller.
1. Open the ADF Upper Cover [1].
2. Remove the gear [1] and the bushing [2].
• 1 claw [3]
1x
3. Remove the plastic E-ring [1] and slide the bushing
[2].
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4. Disassembly/Assembly
[2]
[1]
[3]
[2]
[1]
[1]