Gestetner B070 Service Manual page 547

NOTE: The Europe/Asia model has one length sensor (L1), but the North
American model has two length sensors (L1, L2)
Original Size
A4/A3 Version LT/DLT Version
A3
B4
F4 8
1/2
A4 SEF
B5 SEF
A5 SEF
A4 LEF
B5 LEF
A5 LEF
H
:High (Paper Present)
The original size data is taken by the main CPU when the DF position sensor is
activated. This is when the ADF is positioned about 12 cm above the exposure
glass. At this time, only the sensor(s) underneath the original receive the reflected
light and switch on. The other sensor(s) are off. The main CPU recognizes the
original size from the on/off signals from the five sensors.
If the copy is made with the ADF open, the main CPU decides the original size
from the sensor outputs when the Start key is pressed.
The above table shows the outputs of the sensors for each original size. This
original size detection method eliminates the necessity for a pre-scan and
increases the machine productivity.
Width Sensor 1
Width Sensor 2
Width Sensor 3
SM
CÓPIA NÃO CONTROLADA
Length
Sensor
2
11" x 17"
H
H
10" x 14"
H
" x 14" (8" x 13")
8 " x 11" L
1/2
— L
5 " x 8 " L
1/2 1/2
11" x 8 " L
1/2
L
—
L
8 " x 5 "
1/2 1/2
L
: Low
0,0
A5 SEF
B5 SEF
6-31
CÓPIA NÃO CONTROLADA
Width Sensor
1 1 2 3
H H H
H
H H H L
H H L L
H H L L
H L L L
L L L L
L H H
H
L H H L
L H L
L
Length Sensor 1
Length Sensor 2
A5 LEF
A4 LEF
B4
A4 SEF
SCANNING
SP4301
Display
00011111
00011110
00011100
00001100
00001000
00000000
00000111
00000110
00000100
A3
B070D931.WMF
B070/B071