Adjusting Drum Temperature
In a high-temperature or high-humidity environment, partial distortions, or thin white lines may appear on printed images.
You can prevent this problem by adjusting the photoconductor drum temperature.
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IMPORTANT
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Be sure to contact your local authorized Canon dealer before adjusting the photoconductor drum temperature. Increasing the drum temperature may cause the developer to deteriorate.
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1.
Press 
(Settings/Registration).
(Settings/Registration).2.
Press [Adjustment/Maintenance] → [Adjust Image Quality] → [Adjust Drum Temperature].
3.
Select [Standard] or [High].
Details of each item are shown below.
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[Standard]:
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The default setting.
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[High]:
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Increases the temperature of the photoconductive drum.
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4.
Press [OK].