Epson AcuLaser C1900 Reference Manual page 16

Unless specifically instructed in this guide, be careful not to
touch the fuser, which is marked CAUTION Hot Surface Avoid
Contact, or the surrounding areas. If the printer has been in
use, the fuser and the surrounding areas may be very hot.
Unless specifically
instructed in this guide, do
not insert your hand into
the fuser unit, as it may be
very hot.
Do not insert your hand into the fuser unit as some
components are sharp and may cause injury.
Avoid touching the components inside the printer unless
instructed to do so in this guide.
Never force the printer's components into place. Although the
printer is designed to be sturdy, rough handling can damage
it.
When handling developer cartridges or photoconductor
units, always place them on a clean, smooth surface.
Do not attempt to modify developer cartridges or take them
apart. They cannot be refilled.
Do not touch the toner. Keep the toner away from your eyes.
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