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OPTICS
Original Size
A4/A3 version
A3
B4
—
F4
A4-L
B5-L
A5-L
B6-L
A6-L
A4-S
B5-S
A5-S
A6-S
NOTE: -L: Lengthwise
-S: Sideways
Sensors #4 and #6 are not used for LT/DLT version machines.
The check is done when the platen position sensor [A] turns on. This is when
the platen is positioned about 15 cm above the exposure glass. At this time,
only the sensor(s) located underneath the original receive the reflected light
and are on. Other sensor(s) are off. Through the on/off data of the nine
(seven for LT/DLT version machine) sensors, the main CPU can recognize
the original size.
In case the copy is made with the platen open, the main CPU decides the
original size only through the data when the Print key is pressed.
This original size detection method eliminates the necessity for a pre-scan
and increases the machine's productivity.
[A]
Length Sensor 1 Length Sensor 2
LT/DLT version
11 x 7
10 x 14
8
x 14
1/2
8 x 13
8
x 11
1/2
—
5
x 8
1/2
1/2
—
—
11 x 8
1/2
—
8
x 5
1/2
1/2
—
1
2
3
O
O
O
O
X
O
O
O
X
O
O
—
X
X
O
O
X
X
X
O
X
X
X
O
X
X
X
O
X
X
X
X
X
X
X
X
X
X
X
O
X
X
X
X
X
X
X
X
X
X
X
X
2-44
A176D552.wmf
Width Sensor
4
5
6
7
O
O
O
O
O
O
O
—
O
O
O
O
O
O
O
O
O
O
O
O
X
O
O
X
X
O
X
O
O
O
O
O
O
X
O
O
X
X
X
15 July 1996
8
9
O
O
O
O
O
X
O
X
O
X
X
X
X
X
X
X
X
X
O
O
O
O
X
X
X
X
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