Check the following points to resolve the issue:
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Select Thick Paper mode in the printer driver or use thinner paper than you are currently using.
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(Not available for some models)
Select the appropriate media type in the menu setting.
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Check the machine's environment. Conditions such as high humidity can cause hollow print.
Refer to Product Safety Guide available on the Manuals section.
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The drum unit may be damaged. Replace the drum unit with a new drum unit.
> Click here to see how to replace the drum unit.