Canon MF735C Series Service Manual page 197

6. AGC adjustment (back side) (duplex scanning ADF model only)
1. Entering a provisional value
Change the values of the following service mode settings to 1,000
• COPIER > ADJUST > CCD > LE-BWRBK
• COPIER > ADJUST > CCD > LE-BWGBK
• COPIER > ADJUST > CCD > LE-BWBBK
Change the values of the following service mode settings to 1,100.
• COPIER > ADJUST > CCD > LE-CLRBK
• COPIER > ADJUST > CCD > LE-CLGBK
• COPIER > ADJUST > CCD > LE-CLBBK
2. Execute the following service modes to perform the AGC adjustment (surface).
• COPIER > FUNCTION > CCD > BW-AGC2
• COPIER > FUNCTION > CCD > CL-AGC2
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. If the operation was "successful", this procedure is completed. (There is no need to write the value on the service label.)
4. How to judge whether the operation was successful or failed
Whether the operation was successful or failed is not shown on the UI, so perform the following procedure to judge if
the operation was successful or failed.
B&W mode
• COPIER > ADJUST > CCD > LE-BWRBK
• COPIER > ADJUST > CCD > LE-BWGBK
• COPIER > ADJUST > CCD > LE-BWBBK
If the operation result is judged to be "failed", turn OFF and then ON the power, and execute COPIER > FUNCTION >
CCD > BW-AGC2 again.
Color mode
Check the following values. If all values remain unchanged at "1,100", the operation result is judged to be "failed".
• COPIER > ADJUST > CCD > LE-CLRBK
• COPIER > ADJUST > CCD > LE-CLGBK
• COPIER > ADJUST > CCD > LE-CLBBK
If the operation result is judged to be "failed", turn OFF and then ON the power, and execute COPIER > FUNCTION >
CCD > CL-AGC2 again.
7. Paper back shading initial measurement (duplex scanning ADF model only)
1. Execute the following service mode without placing anything on the Stream Reading Glass.
• COPIER > FUNCTION > CCD > BK-SHD1
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6. Adjustment