The Copy Process - Ricoh D014 Service Manual

Copy Process Overview

6.4.2 THE COPY PROCESS

Here is a general description of the copy process.
Drum Charge
In darkness a charge roller [1] in the color PCUs (Y,C,M) and a charge corona unit in the
black PCU (K) [2] give a negative charge to each drum. The charge stays on the surface of
the drum because the OPC layer has a high electrical resistance in the dark.
Exposure
A xenon lamp [3] exposes the original as it scans over the exposure glass above. Light
reflected from the original passes to the CCD, where it is converted into an analog data
signal. This data is converted to a digital signal, processed, and stored in the memory. At
the time of printing, the data is taken from the memory and sent to the laser diode. For
multi-copy runs, the original is scanned once and stored in a temporary file on the hard
disk.
D014/D015/D078/D079
CÓPIA NÃO CONTROLADA
6-10
CÓPIA NÃO CONTROLADA
SM