Ricoh M281 Series Service Manual page 538

Jam Detection
6.11.3 SENSOR LAYOUT
MP 501/601
Abbreviation
AROS ARDF original sensor
ARRS ARDF registration sensor
ARTS ARDF original timing sensor
BPES Bypass paper end sensor
DUS1 Duplex sensor 1
DUS2 Duplex sensor 2
D255/D256/M281/M282
Name Abbreviation
6-100
PFPS1 Paper end sensor 1
PFPS2 Paper end sensor 2
PFPS3 Paper end sensor 3
PFPS4 Paper end sensor 4
PFS Paper exit full sensor
PS1 Paper end sensor 1
Name
*1
*1
*1
*1
SM