Epson AcuLaser C1900 Reference Manual page 247

Be sure not to scratch the surface of the drum. Also, avoid
touching the drum, since oil from your skin may permanently
damage its surface and affect print quality.
To get the best print quality, do not store the photoconductor
unit in an area subject to direct sunlight, dust, salty air, or
corrosive gases (such as ammonia). Avoid locations subject to
extreme or rapid changes in temperature or humidity.
Warning:
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Replacing the photoconductor unit
Follow these steps to replace the photoconductor unit.
1. Open the front cover.
Do not dispose of the used photoconductor unit in fire, as it
may explode and cause injury. Dispose of it according to local
regulations.
Keep the photoconductor unit out of the reach of children.
Replacing Consumable Products
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