Print quality problems, Print quality problems -9, The printout is too light or too dark – Canon imageRUNNER C3100 N User Manual
Page 85: Cause 1 the toner density settings are not correct, Cause 2 toner save is set to 'on

Printing Problems
4-9
4
T
roub
leshooting
Data that should be printed on the same page is printed on two separate pages
Cause 1
The application software's "Line spacing" and "Number of lines on a page"
settings are not correct.
Remedy
Change the settings so that the data fits on one page and print the data again.
(See the application software manual.)
Cause 2
The Timeout setting is too short, when the Personality setting is set to 'Auto'.
Remedy
Change the Personality setting to a setting other than 'Auto', or increase the
Timeout setting. (See "Personality," on p. 2-22, and "Timeout," on p. 2-15.)
Print Quality Problems
The printout is too light or too dark
Cause 1
The toner density settings are not correct.
Remedy
Adjust the toner density and print the data again. (See "Density," on p. 2-10.)
Cause 2
Toner Save is set to 'On'.
Remedy
Set Toner Save to 'Off' and print the data again. (See "Toner Save," on p. 2-10.)
Cause 3
The machine's density settings are not adjusted correctly.
Remedy
Perform an Automatic Gradation Adjustment. (See Chapter 4, "Customizing
Settings," in the Reference Guide.)
Toner does not fix properly
Cause
Toner may not fix well on some types of paper.
Remedy
Enable Gray Compensation in the printer driver and print the data again. (See
the Help function on the printer driver.)
NOTE
You can also perform the same procedure from the touch panel display. (See "Gray
Compensation," on p. 2-31.)