Printouts (envelopes, cardboard) have creases.
Please check the following points:
Step 1:
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Check that you use the paper that meets our specification.
Please refer to "What is the recommended paper?".
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Check that the drum units and toner cartridges are installed properly.
Please refer to the instructions, "How do I replace a drum unit?" and "How do I replace the toner cartridge?".
If you still have a print quality problem, please go to the Step 2.
Step 2:
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Make sure that the fuser cover (1) inside the back cover is closed properly.
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Make sure that two grey levers inside the back cover, one on the left-hand side and one on the right-hand side, are pulled down.
![The two gray levers are pulled down.](/g/b/img/faqend/faq00000231_028/gb/en/18414/pulldown.jpg)
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Make sure that the media type settings in the printer driver and in the machine's Paper Type menu matches the type of paper you are using.