Canon LASER SHOT LBP3500 User Manual page 410

The overall print result is faint.
Cause 1 The setting for [Toner Density] is not appropriate.
Remedy Drag the [Toner Density] slider in the printer driver toward [Dark].
In order to specify the setting for [Toner Density], display the [Detailed Settings]
dialog box by clicking [Details] in the [Quality] sheet.
Cause 2 [Toner Save] is selected.
Remedy Clear the [Toner Save] check box in the printer driver.
In order to specify the setting for [Toner Save], display the [Detailed Settings]
dialog box by clicking [Details] in the [Quality] sheet.
The overall print result is dark.
Cause 1 The setting for [Toner Density] is not appropriate.
Remedy Drag the [Toner Density] slider in the printer driver toward [Light].
In order to specify the setting for [Toner Density], display the [Detailed Settings]
dialog box by clicking [Details] in the [Quality] sheet.
Cause 2 The printer is exposed to direct sunlight or strong light.
Remedy Move the printer to a place where it will not be exposed to direct sunlight or
strong light. Alternatively, move the strong light source away from the printer.
The print is uneven.
Cause 1 The toner cartridge has run out of toner.
Remedy Replace the toner cartridge with a new one. (See "Replacing the Toner
Cartridge," on p. 5-2)
Cause 2 Paper is too moist or too dry.
Remedy Replace the paper with appropriate one and print again. (See "Paper
Requirements," on p. 2-2)
Cause 3 The toner cartridge has deteriorated or is damaged.
Remedy Replace the toner cartridge with a new one. (See "Replacing the Toner
Cartridge," on p. 5-2)
Front or back of the printed paper has smudge marks.
Cause The fixing roller is dirty.
Remedy Clean the fixing roller. (See "Cleaning the Fixing Roller," on p. 5-15)
Print Quality Problems
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