Ricoh B064 Service Manual page 805

Rev. 08/2002
6. DETAILED DESCRIPTIONS
6.1 COPY PROCESS OVERVIEW
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1. EXPOSURE
A xenon lamp exposes the original. 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 retrieved and sent to the laser diode. For multi-copy runs,
the original is scanned once and stored on the hard disk.
2. DRUM CHARGE
In the dark, the charge corona unit gives a negative charge to the OPC drum.
The grid plate ensures that corona charge is applied uniformly. The charge
remains on the surface of the drum because the OPC layer has a high
electrical resistance in the dark.
SM
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10
9
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6-1
COPY PROCESS OVERVIEW
1
B064D553.WMF
3
4
B064D981.WMF
5
B064/B065