Oki 6ex, 6E specifications Image drum Surface potential 100 Charged part

The image roller surface is charged to about –750 V by the contact charge of the charge roller.

When the light from the LED head irradiates the image drum surface, the light energy generates positive and negative carriers in the CGL. The positive carriers are moved to the CTL by an electrical field acting on the image drum. Likewise, the negative carriers flow into the aluminum layer (ground).

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.

(V)	Light
	from
	LED
–750

Image drum

surface potential

–100

0

Charged part	Part	Charged
	irradiated	part
	by
	LED

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