Primary Charging (Step 2); Laser Exposure (Step 3) - Canon 1000 Service Manual

2. COPYING PROCESS
D. Primary Charging (step 2)
Photosensitive
Figure 2-105
The negative corona of the primary charging
assembly charges
photosensitive drum to a uniform negative
potential, establishing primary potential.
Since the surface potential of the charged
photosensitive drum is determined by the potential
of the grid, a bias is applied to the grid to ensure a
specific drum surface potential.
2-4
COPYRIGHT © 2001 CANON INC.
Primary
charging
assembly
Grid wire
-
- -
+
-
+
+
+
drum
the surface of
E. Laser Exposure (step 3)
Dark area
A laser beam of an intensity suited to the
the image density of the original is directed to the
surface of the photosensitive drum, thereby
neutralizing the charges on the surface. Such
areas are called the light areas of the
photosensitive drum and will later attract toner in
step 4 (development).
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Laser beam
Light area
Figure 2-106