Double Feed Detection Mechanism - Ricoh DD5450 Field Service Manual

Chapter 3 Paper Feed Section
3

(2) Double Feed Detection Mechanism

Description
The double feed detect sensor is installed at the rear of the paper top detect sensor to detect
feeding of multiple papers. When it is detected, "DOUBLE FEED CHECK PAPER EJECTION" is
displayed on the LCD panel. If double feeding occurs with the tape dispenser (option) installed, the
tape is inserted.
Circuit
Paper top detect sensor
Photoreceiving PCB
Paper top detect sensor
Photoemitting PCB
Signal sensor
Photoreceiving PCB
Signal sensor
Photoemitting PCB
134
Blue
CN10-6
White
-7
Red
-8
gray
CN10-9
Blue
-10
Blue
CN10-11
Yellow
-12
Red
-13
Red
CN10-16
White
-17
Pink
CN10-14
Blue
-15
Green
CN10-19
Red
-20
Signal sensor
Photo-emitting
Signal sensor
Paper top
detect sensor
Main PCB unit
Photo-receiving
Paper top
detect sensor
Photo-emitting
Photo-receiving