Ricoh DD 4450 Service Manual page 26

Overview
No. Component
55 2nd Feed Timing Sensor
58 Feed Start Timing Sensor
60 Table Lower Sensor
Master Eject Position (Drum
63
HP) Sensor
64 Paper Exit Timing Sensor
65 Clamper Closed Sensor
66 Clamper Open Sensor
71 Duct plate HP sensor
73 Cutter HP Sensor
76 Master Set Cover Sensor
77 Master End Sensor
80 Duct jam sensor
82 Thermal head HP sensor
85 Master edge sensor
94 Ink idling roller HP sensor
C279
Function
Determines the paper misfeed check timing at the
paper registration area.
Determines the paper feed start timing.
Detects when the paper table is at its lower limit
position.
Detects when the drum is at the master eject
position.
Determines the paper exit misfeed check timing.
Detects if the clamper is in the closed position.
Detects if the clamper is in the open position.
Detects when the duct plate is at the home
position.
Detects when the cutter is at the home position.
Checks if the master set cover is properly set.
Detects when the master making unit runs out of
master roll.
Detects when a master remains in the duct.
Detects when the thermal head is at the home
position.
Detects the leading edge of the master.
Detects when the idling roller is at home position.
1-8 SM