Remaining Paper Detection/Paper End Detection - Ricoh PB3280 Field Service Manual

No.
1 End fence
2 Paper size detection switch (SW1)
Size detection switch operation
Paper size
SRA3 (12"×18")
A3 (DLT)
B4 (LG)
A4_SEF
LT_SEF
B5_SEF
A4_LEF (LT_LEF)
B5_LEF (Exe_LEF)
A5_LEF

Remaining Paper Detection/Paper End Detection

Remaining paper detection
Detection of paper remaining in the Paper feed tray is performed by a combination of ON/OFF
(contact/non-contact) of contact-type remaining detection plates (printed circuits) CN-3, CN-5.
When the amount of remaining paper decreases, and the tray lift motor (M3) rotates, the remaining
paper sensors CN-3 and CN-5 in the motor are turned ON/OFF.
The following 4 levels of remaining paper can be detected:
Amount remaining
CN-3
Description No.
3 Size detection actuator
4 Tray set detection switch (SW2)
Size detection switch
SW4 SW3
1 0
0 1
0 0
0 1
1 1
1 1
1 0
0 0
0 0
0 1
100%
OFF
1.Detailed Descriptions
Description
SW2
1 0
0 0
1 1
1 1
1 0
0 0
0 0
0 1
1 0
0 1
70% 30%
ON ON
SW1
10%
OFF
9