95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–48
Stage 1: Electrostatic Latent Image Formation
This stage consists of two steps, primary charging and scanning expo-
sure. Upon completion of this stage, the points on the drum that are
struck by a laser beam have their charge neutralized, while those points
not struck remain negatively charged. The image that is irradiated onto
the drum in this manner is invisible and is therefore referred to as a
“latent” image.
0
-100
-500
Time (t)
Bright
area
Dark
area
Primary
Charging
(Step 1)
Surface Electric
Potential (V)
Scanning
Exposure
(Step 2)
Transfer
(Step 6)
Primary
Charging
(Step 1)
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