Print Quality Problems - Canon imageCLASS D661 Reference Manual

If the documents have black streaks or appear dirty after you feed them in the ADF.
The ADF roller is dirty.
• Clean the ADF roller. (→ p. 5-3)
• For additional troubleshooting, → Print Quality Problems.
NOTE

Print Quality Problems

The print quality is not what you expect; print is not clear, has missing dots or white
streaks.
The size, thickness and type of the paper you are using are not within the specifications of the machine.
• Check that the paper you are using is supported by the specifications of the machine. (→ p. 2-1)
The cartridge may not be installed properly.
• Make sure the cartridge is installed properly. (→ Set-up Instructions)
The toner in the cartridge may be low.
• Refer to "When to Replace the Cartridge" (→ p. 5-4) and replace if necessary. (→ p. 5-7)
The copy exposure may not be adjusted correctly.
• Adjust exposure correctly. (→ p. 4-6)
Copies are dirty.
The platen glass or rear side of the ADF may be dirty.
• Clean the platen glass or rear side of the ADF. (→ p. 5-1)
The rollers inside the machine are dirty.
• Clean the rollers. (→ p. 5-2)
There may be a scratch on the cartridge.
• Replace the cartridge with a new one.
Condensation has built up inside the machine.
• Allow at least two hours for the machine to adjust to room temperature before attempting to use it.
The machine may be installed in a location where the floor or foundation is unstable.
• Install the machine in a proper location. (→ p. 1-1)
Black lines on the copy
The read area of the platen glass is dirty.
• Clean the read area of the platen glass. (→ p. 5-2)
Copies are too dark or too light.
The copy exposure may not be adjusted correctly.
• Adjust the copy exposure correctly in the PRINT EXPOSURE of the COMMON SETTINGS of the Additional
Functions. (→ p. 7-2)
TONER SAVER MODE may be set to ON in the COMMON SETTINGS of the Additional Functions.
• Set TONER SAVER MODE to OFF. (→ p. 7-2)
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