Canon MF720 Series Service Manual page 237

8. If the operation result is "failed", turn OFF and then ON the power, execute
• COPIER > FUNCTION > CCD > DF-WLVL1 (White level adj in book mode: color)
and then execute
• COPIER > FUNCTION > CCD > DF-WLVL2 (White level adj in ADF mode: color)
again.
9. Checking the value of DFTAR-BW
Check the value of
• COPIER > ADJUST > CCD > DFTAR-BW (Adjustment of shading target value (B&W) at ADF reading)
If the value remains the same as the value you entered, the operation result is judged to be "failed".
10. If the operation result is "failed", turn OFF and then ON the power, execute
• COPIER > FUNCTION > CCD > DF-WLVL3 (White level adj in book mode (B&W))
and then execute
• COPIER > FUNCTION > CCD > DF-WLVL4 (White level adj in ADF mode (B&W))
again.
7. Copyboard color displacement offset adjustment
Enter the value shown on the label that comes with the part in the following service mode.
Enter the values of 50-RG, 50-GB, 100-RG, and 100-GB shown on the replacement label in the following service mode, and
write the entered values on the service label.
• COPIER > ADJUST > CCD > 50-RG (Color displacement (R and G lines) correction value in the vertical scanning
direction (50%))
• COPIER > ADJUST > CCD > 50-GB (Color displacement (G and B lines) correction value in the vertical scanning
direction (50%))
• COPIER > ADJUST > CCD > 100-RG (Color displacement (R and G lines) correction value in the vertical scanning
direction (100%))
• COPIER > ADJUST > CCD > 100-GB (Color displacement (G and B lines) correction value in the vertical scanning
direction (100%))
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.
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5. Adjustment