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2. Controlling the Drum Surface Potential
a. Outline
The CLCXOOO measures the drum surface potential to control the level of the grid and the developing
biases as shown in Figure 3-506. When the power switch is tuned on, the appropriate grid and develop-
ing biases are determined so as to obtain an ideal contrast potential (initial potential control); thereafter,
the appropriate grid bias is determined each time the Copy Start key is pressed, thereby correcting
changes over time (potential correction).
Corrects grid bias (Vg)
See the pages that follow for details of each control mechanism.
The timing of control is as follows:
Initial Potential Control
If the temperature of the fixing roller is 110°C or less when the power switch is turned ON.
l
Potential Correction
Each time the Copy Start key is pressed.
l
3-88
Figure 3-506
CANON CLClOOO REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Potential control
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