Xerox Phaser 7300B, Service Manual, Page: 239 / 277

Theory of Operation 8-223
2.
The toner cleaning blade scrapes away excessive toner on the developing roller to
form a thin film of toner on the surface of the developing roller.
3.
The toner is attracted to the latent image on the surface of the drum at the point
where the drum is in contact with the developing roller. The latent image on the
surface of the drum is made visible from the applied toner.
Transfer
The transfer roller, made of a conductive sponge, presses the paper against the surface
of the drum. This process sandwiches the paper between the surface of the drum and
the transfer roller. When the positive charge, supplied by the high voltage power
supply, is applied to the transfer roller the positive charge on the roller jumps to the
surface of the paper. At that time, the transfer roller touches the paper and attracts the
negatively-charged toner from the surface of the drum onto the surface of the paper
.
Charge
Roller
Developer
Roller
Toner
Cleaning
Blade
Sponge
Roller
Drum
S7300-133
Power
Supply
S7300-134
Drum
Transfer
Roller
Media
Transfer Unit
Belt