Ricoh B121 Service Manual page 418

OVERALL ELECTRICAL CIRCUIT
2.7 OVERALL ELECTRICAL CIRCUIT
The DF CPU controls the DF feed motor, DF feed clutch, DF pick-up solenoid, and
stamp solenoid. The DF CPU also monitors all sensors and provides updated
status when prompted at regular intervals by the mainframe, which may then take
action based on this information. The DF/mainframe connection is checked
automatically immediately after the mainframe is powered on.
Main
Frame
Registration Sensor
Original Set Sensor
DF Position Sensor
Feed Cover Open Sensor
Original Width Sensor 1
Original Width Sensor 2
Original Length Sensor 1
Original Length Sensor 2
Original Trailing Edge Sensor
B387
ADF Control
Interface
CPU
Driver
Driver
ADF Control Board
12
DF Feed Motor
DF Feed Clutch
DF Pick-up
Solenoid
Stamp Solenoid
B387D500.WMF
SM