1173SBM1300A
13
ORIGINAL SIZE DETECTING SENSORS
The five sensors fixed in the optical section receive the light reflected off the original to
determine the size of the original in the Auto Paper and Auto Size mode. (The image den-
sity of the original, or OD, that can be detected is 0.6 or less.)
1173SBM1301A
13-1. Identification of Original Size Detecting Sensors
Original Size Detecting
Sensor CD1 PC114
Original Size Detecting
Sensor CD2 PC116
Size Reset Switch
S108
1173SBM1302A
13-2. Original Size Detecting Operation
Each photo receiver of the original size detecting sensors responds to reflected light of a
given intensity with reference to the intensity of the light emitted by each LED. This allows
the Original Size Detecting Board to determine whether or not there is an original within a
set distance.
Photo Receiver
Original Size Detecting
Sensor FD1 PC117
Original Size Detecting
Board UN2
LED
M-33
Original Cover Detecting
Sensor PC111
Original Size Detecting
Sensor FD3 PC115
Original Size Detecting
Sensor FD2 PC113
Original
Original Glass
Set Distance
1136M020AA
1149M011AA