Oki B820N Setup Instructions page 103

3
Lightly wipe the whole LED head
with a soft cloth or soft tissue
paper.
Do not use solvents, such as methyl alcohol or
Note!
thinners. They damage the LED head.
4
Close the top cover.
When "CHECK IMAGE DRUM/543:TONER SENSOR
Note!
ERROR" information shows, be sure to turn the
knob in the direction toward the lock mark ( ) until
the knob stops.
LED head
Replacing the Toner Cartridge
3
103