Canon MF229dw User Manual page 358

After the setting is changed
By specifying <Off> or <Mode 1>, streaks may adhere to the print paper. By specifying <Mode 3> or <Mode 4>, outlines may be
blurred or images may appear somewhat grainy. The print density becomes lighter as the setting progresses from <Off> to <Mode
4>.
After printing from a smartphone or tablet
If streaks adhere to the paper, change the setting with <Special Mode Z>
Special Mode B
Adjust this setting if streaks adhere to the print paper after replacing the toner cartridge or after not printing for a long period of
time.
Off
Mode 1
Mode 2
Mode 3
<Menu>
After the setting is enabled
Print speed is slower.
Special Mode C
Adjust this setting if streaks adhere to the print paper when printing out received faxes.
Off
On
<Menu>
After the setting is enabled
When set to <On>, this setting takes priority over the setting for <Special Mode Z>.
While more effect is gained than with <Special Mode Z>, print speed is slower.
Special Mode D
Adjust this setting if streaks adhere to the print paper.
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<Adjustment/Maintenance>
<Adjustment/Maintenance>
<Copy>.
<Special Processing> <Special Mode B>
<Special Processing> <Special Mode C>
Select the mode
<On>