Lexmark W820 Service Manual - Page 286
V = Home position, 0 V = Not home position
UPC - 734646210508
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4025-Finisher Signal Name Description TRAY MOTOR + Rotates forward with 24 V power supply. TRAY MOTOR - Rotates reversely with 24 V power supply. TRAY LOWER Detects the lower limit position of the tray. 5 V = Not home position, 0 V = Home position. TRAY EMPTY Detects the presence of paper on tray. 5 V = Paper present on tray, 0 V = No paper on tray. UPPER FULL Detects paper delivery on tray. 5 V = Paper delivered, 0 V = No paper delivered. TRAY UPPER Detects the upper limit position of the tray. 5 V = Home position, 0 V = Not home position. ANODE(L) LED actuation signal for the paper stacking height detection on lower position. VOUT(L) Detects the paper stacking height on upper position (Receive). LED DRIVE(L) Detects the paper stacking height on lower position (Send). ANODE(R) LED actuation signal for the paper stacking height detection on lower position. VOUT(R) Detects the paper stacking height on upper position (Receive). LED DRIVE(R) Detects the paper stacking height on lower position (Send). S.C.M.+ Rotates forward with 24 V power supply. S.C.M.- Rotates reversely with 24 V power supply. 5-26 Service Manual