Canon LBP7660Cdn Manual page 928

If you change the settings, the toner may not fix onto paper well, and the printing may come out
faint.
Select [Curl Correction] under [Special Print Mode] set it to [On] and print again.
"[Setup] Menu ([User Maintenance] Options)"
If you change the settings, the toner may not fix onto paper well, and the printing may come out
Solution 2
faint.
If you specify this setting, printing speed drops.
<Cause 4> Depending on the paper type or the operating environment, the paper may curl as
either of the following.
Perform the following procedure in the printer driver.
1. Display the [Paper Source] sheet.
2. Set [Paper Type] to one of the following settings.
Solution
When the settings are changed, sometimes residual images appear on non-printed areas.
[Coated 3] [Coated 2]
[Coated 4] [Coated 3]
Currently Selected
Setting
[Plain L2] [Plain L]
[Plain L] [Plain]
[Plain] [Plain H]
[Plain H] [Heavy 1]
[Heavy 1] [Heavy 2]
[Heavy 2] [Heavy 3]
[Envelope] [Envelope H]
[Coated 1] [Coated 2]
[Coated 2] [Coated 3]
[Coated 3] [Coated 4]
Setting to be Selected