AcuLaser C2800/C2800D/C3800/C3800D Revision C
OPERATING PRINCIPLES Control 61
Confidential
The following table shows the on/off status of Paper Size Switch in the SWITCH
ASSY SIZE according to the paper size.
ON: Paper Size Switch is pressed by the actuator.
2.7.2 ROS Light Intensity Control
An image data converted to electric signals (expresses image data by ups and downs of
voltage) is sent to the laser diode in the ROS ASSY, and the laser diode converts the
electric signals to the light signals (controls on/off of the laser beam).
The laser diode monitors and controls the light intensity of the laser beam to create
stable electrostatic latent image without being affected by the fluctuations of the laser
beam intensity, optical system (such as lenses), and drum sensitivity.
The ROS of this printer has laser diodes for each yellow, magenta, cyan, and black, and
the light intensity for each color is automatically adjusted.
C H E C K
P O I N T
Paper Size Switches are referred to as “SW2”, “SW1”, and “SW0”
from the top.
Table 2-2. Paper Size Control
Paper Size
Paper Size Switch
SW2 SW1 SW0
LEGAL14" (SEF) ON ON ON
LEGAL13" (SEF) ON ON OFF
EXECUTIVE (SEF) ON OFF ON
B5 (SEF) ON OFF OFF
A4 (SEF) OFF ON ON
LETTER (SEF) OFF OFF ON
A5 OFF ON OFF
No cassette OFF OFF OFF
Figure 2-40. Paper Size Switch
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