Epson AcuLaser C8500 Quick Reference Manual page 3

4. Push up the switch located on the top left, then
release it. Turn the upper knob located just above
the cartridge installation window clockwise until it
stops. The switch automatically drops down to the
lower position and the next toner cartridge appears
in the installation window. Repeat this step until
you see the color that you need to replace.
Note:
If the knob cannot be moved, first check that the switch
is in the upper position. Do not turn the knob by force.
5. Turn the toner cartridge knob 90 degrees
counterclockwise so that the N symbol on the knob
is in the release position shown below. By turning
the knob, the toner cartridge protrudes slightly.
6. Pull the toner cartridge out of the slot.
7. Take the new toner cartridge out of its package, and
gently shake it from side to side and front to back
to distribute the toner evenly.
8. Hold the toner cartridge as shown below, and
insert it all the way into the slot until it stops.
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