Exposure Assembly; Developer Assembly - Lexmark Optra Color 1200 Service Manual

5050-001

Exposure Assembly

The exposure assembly uses an LED head to form an electrostatic
image by emitting light onto the charged drum. The length of time
the light is on is contained in non-volatile memory (EEPROM) in the
printer controller because the light emitting time of each LED is
different in every head. When the LED head is replaced, the light
emitting time must be reset. If you replace the LED head, be sure to
also replace the EEPROM.

Developer Assembly

The toner agitator stirs the toner in the cartridge.The toner supply
roller provides toner to the development roller.The doctor blade is
pressed to the development roller which is conductive rubber.
As the development roller rotates, toner feeds between the
developer roller and the doctor blade. This friction charges the toner
negatively. As the toner comes in contact with the photoconductor
drum, it sticks to the electrostatic latent image.
General Information
1-11