Lexmark W820 - Optra B/W Laser Printer Service Manual page 289

BD11JEZ-9P (PWBA I/O (EG))
Signal Name Description
UPPER EMPTY Detects the upper limit position of the tray.
5 V = Home position, 0 V = Not home position.
UPPER FULL Detects the top surface of paper stacked on tray.
UPPER EXIT 5 V = Paper delivered, 0 V = No paper delivered.
BUFFER SOL Controls the gate open/close of the horizontal transfer upper tray.
EJECT OPEN A Rotates the Ejector Open/Shut Motor by pulse signals from the Finisher Main PWB.
EJECT OPEN /A Rotates the Ejector Open/Shut Motor by pulse signals from the Finisher Main PWB.
EJECT OPEN B Rotates the Ejector Open/Shut Motor by pulse signals from the Finisher Main PWB.
EJECT OPEN /B Rotates the Ejector Open/Shut Motor by pulse signals from the Finisher Main PWB.
4025-Finisher
5-29
Connectors