Printing Process - Ricoh G165 Service Manual

Machine Overview

6.1.6 PRINTING PROCESS

This machine uses four AIOs and four laser beams for color printing. Each AIO contains a
drum, charge roller, cleaning brush, blade, development roller and mixing auger.
The toner image on each drum is moved to the image transfer belt. The four colors are put
on the belt. All four toners are put on the belt at the same time. Then the completed
four-color image is moved to the paper.
1. OPC charge (AIO):
The charge roller gives the OPC a negative charge.
2. Laser exposure:
The laser beam from the laser diode (LD) goes through the lens and mirrors and to the
drum. To make a latent image on the drum, the machine turns the laser beam on and
off.
3. Development (AIO):
The development roller moves negatively-charged toner to the latent image on the
drum surface. This machine uses four development units (one for each color).
4. Image transfer:
The charge that is applied to the image transfer roller pulls the toner from the drum to
the transfer belt. Four toner images are put on the paper at the same time.
5. Cleaning for the OPC:
The cleaning blade removes remaining toner on the drum surface after image transfer
to the paper.
G165/G166/G167/G181/G183/G184 6-10 SM