Oki OKIPAGE 14e Service Manual page 29

(3) Exposure
Light emitted by the LED head irradiates the image drum surface with a negative charge. The
surface potential of the irradiated portion of the image drum drops, forming an electrostatic latent
image associated with the image signal.
Power
supply
The image drum is coated with an underlayer (UL), a carrier generation layer (CGL), and
carrier transfer layer (CTL) on aluminum base. The organic photo conductor layer (OPC),
comprising CTL and CGL, is about 20 µm thick.
41605601TH Rev.2
LED head
Charge roller
Image drum
LED head
Paper
Image drum
Image drum
CTL
CGL
UL
Base
20µm
30mm
28 /