Lexmark 5021-0XX manual Cbv Dbv

5021-0XX

5.Variation of the OPC belt potential:

a.The OPC belt is biased to -CBV(V).

b.The OPC belt surface is evenly charged to -Vo(V) during the charging process.

c.During the exposing process, the optical unit emits a laser beam that strikes the OPC belt surface forming an electrostatic image. The electrostatic image is at -VR(V) potential.

d.The negatively charged toner is moved to the OPC belt in the development process due to the difference between -VR(V) and -DBV(V). A visible image is the result.

e.The negatively charged toner on the OPC belt is moved to the transfer belt because the potential GND of the transfer belt is greater than -VR(V) of the OPC belt.

f.The OPC belt is discharged by the erase lamp radiating on the OPC belt.

Latent image

Toner image

-CBV	-V0	-V0	-V0	-V0	-V0	-V0	-V0	-V0 -V0	-CBV
-CBV	-V0	-V0	-V0	TEST	-V0	-V0	TEST		-CBV
-CBV	-V0	-V0	-V0	PRINT	-V0	-V0	PRINT		-CBV
-CBV	-V0	-V0	-V0	-V0	-V0	-V0	-V0	-V0	-CBV
OPC belt								TEST
								PRINT	Blade
					K	Y M C			6
			Laser diode						Erase lamp
	Charging				Developing
			exposing						5
	1				3
			2					Transfer belt
								4
0V
OPC belt surface
-CBV
	-VR						-DBV
-V0Charge brush								(M)toner
				Developer roller
	Discharge roller

-CBV

-CHV (-BRV)

OPC charging system
DCV	-DBV

1-28Service Manual