Check the following points to resolve the issue:
Check the machine's environment. Conditions such as high temperatures and high humidity can increase the amount of background shading.
Refer to Product Safety Guide available on the Manuals section.
Clean the drum unit.
> Click here to see how to clean the drum unit.
Replace the toner cartridge with a new toner cartridge.
> Click here to see how to replace the toner cartridge.
Replace the drum unit with a new drum unit.
> Click here to see how to replace the drum unit.
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