Oki OKIPAGE 14i Service Manual page 49

The positive carriers moved to the CTL combine with the negative charges on the image drum surface accumulated by the contact charge of the charge roller,
lowering the potential on the image drum surface. The resultant drop in the potential of the irradiated portion of the image drum surface forms an electrostatic
latent image on it. The irradiated portion of the image drum surface is kept to about -100 V.
(4) Developing
Toner is attracted to the electrostatic latent image on the image drum surface, converting it into a visible toner image. Developing takes place through the contact
between the image drum and the developing roller.
1 As the toner supply roller rotates while rubbing on the developing roller, a friction charge is generated between the developing roller and the toner, allowing the
toner to be attracted to the developing roller (the developing roller surface is charged positive and the toner, negative).