Ricoh Aficio MP2550B Service Manual page 674

Component Layout
Electrical Component Descriptions
Boards
Item No.
Main Board 17
Punch Board 51
Sensors
Item No.
Proof Tray
1
Exit Sensor
Shift Tray
3
Exit Sensor
Shift Tray
Position 5
Sensor
Rear
Booklet
6
Tray Full
Sensor
Front
Booklet
7
Tray Full
Sensor
Proof Tray
8
Full Sensor
Exit Guide
Plate HP 9
Sensor
Entrance
10
Sensor
Staple Tray
12
Exit Sensor
Lower Limit
19
Sensor
Upper
Cover 20
Sensor
Shift Motor
24
HP Sensor
B793
Purpose
Controls the finisher.
Controls the punch unit.
Detects paper when it is fed out to the proof tray.
Detects paper when it is fed out to the shift tray.
Detects when the shift tray is at the correct height to receive paper.
One of two sensors that the machine uses to determine when the
booklet tray is full.
One of two sensors that the machine uses to determine when the
booklet tray is full.
Detects when the proof tray is full.
Detects when the exit guide plate is at home position
Detects when paper comes into the finisher
Detects paper leaving the bottom of the stapler
Detects when the shift tray has moved to its lowest possible position
(the shift tray is full).
Detects when the upper cover is open
Detects when the side-to-side motion of the shift roller is at home
position
Purpose
34 SM