Specifications

Name Symbol Function
1 Size Reset Switch S7 Clears the preceding original size data.
2
Original Size Detecting
Sensor CD2 (option)
UN7
Detects the size of the original in the
crosswise direction (i.e., width). Enables the
detection of an inch size original.
3
Original Size Detecting
Sensor CD1
UN6
Detects the size of the original in the
crosswise direction (i.e., width).
4
Original Size Detecting
Board
UN2
Determines the size of the original based on
the data provided by the Original Size
Detecting Sensors.
5
Original Cover Detecting
Sensor
PC4
Detects the position of the Original Cover,
whether it is raised or lowered.
6
Original Size Detecting
Sensor FD3 (option)
UN3
Detects the size of the original in the feeding
direction (i.e., length). Enables the detection
of an inch size original.
7
Original Size Detecting
Sensor FD2
UN4
Detects the size of the original in the feeding
direction (i.e., length).
8
Original Size Detecting
Sensor FD1
UN5
Detects the size of the original in the feeding
direction (i.e., length).
11-2. Construction of the Original Size Detecting Sensor
•
The original size detecting sensors used in the system determine the
distance between the sensor and the original, which enables the detection
of originals with high image density (original density up to 0.8).
•
Each sensor has two LEDs (LED1 and LED2) and one photo receiver
(PSD).
•
Two types of sensor are used: the CD (crosswise) and FD (feeding
direction) sensors. Since the CD sensors are installed at a height different
from FD sensors, each type has a different setting distance as detailed
below.
CD sensors : Setting distance 124 mm
FD sensors : Setting distance 60 mm
CD Sensor
FD Sensor
PSD
LED1
LED2
LED2
LED1
PSD
M-55