Pre-Exposure (Step 1); Primary Charging (Step 2) - Canon GP200 Service Manual

C. Pre-Exposure (step 1)
Figure 2-105
Before executing primary charging, light from
the pre-exposure lamp is directed to the surface
of the drum (pre-exposure), thereby removing
residual charges from the surface and, ultimately,
preventing uneven copy density.
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D. Primary Charging (step 2)
made of conducting rubber so as to charge the
photosensitive drum directly for primary charging.
The use of direct charging requires less applica-
tion voltage than conventional corona charging
and produces virtually no ozone.
applied to the photosensitive drum.
and is not the same as the transfer roller.
CANON GP215/200 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
2. COPYING PROCESS
Primary charging roller
Figure 2-106
The GP 215/GP200 uses a charging roller
An AC bias is applied to stabilize the charges
The primary charging roller is a special roller
2–3