Canon MF735C Series Service Manual page 190

2. Place the Paper Back Shading Adjustment Jig (FL1-4365) on the Stream Reading Glass and execute the following
service mode.
• COPIER > FUNCTION > CCD > BK-SHD2
CAUTION:
Be sure to close the ADF before executing the foregoing service mode. Also be sure not to open the ADF while the service
mode is being executed.
3. Check COPIER > DISPLAY > CCD > BK-SHDST to determine if it was [1] successful or [0] failed.
4. If it failed, clean the Stream Reading Glass and the Paper Back Shading Adjustment Jig (FL1-4365) and execute the
initial measurement of the paper back shading again.
4. DF white level (DF shading target) adjustment
1. Enter the values in the following service mode items respectively, and then adjust the white level.
• Set the value of COPIER > ADJUST > CCD > DFTAR-R to 299.
• Set the value of COPIER > ADJUST > CCD > DFTAR-G to 309.
• Set the value of COPIER > ADJUST > CCD > DFTAR-B to 307.
• Set the value of COPIER > ADJUST > CCD > DFTAR-BW to 315.
In the case of the duplex scanning ADF model also change the following settings.
• Set the value of COPIER > ADJUST > CCD > DFTBK-R to 299.
• Set the value of COPIER > ADJUST > CCD > DFTBK-G to 309.
• Set the value of COPIER > ADJUST > CCD > DFTBK-B to 307.
• Set the value of COPIER > ADJUST > CCD > DFTBK-BW to 315.
2. Place a sheet of A4 or LTR blank paper (paper recommended by Canon) on the Copyboard Glass of the reader and
execute the following service mode.
• COPIER > FUNCTION > CCD > DF-WLVL1
3. Place the same blank paper on the ADF and execute the following service mode.
• COPIER > FUNCTION > CCD > DF-WLVL2
4. If the operation was successful, write the setting value on the service label.
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6. Adjustment