Xerox N2125N - DocuPrint B/W Laser Printer Service Manual page 282

Controls OCT operations.
Offset Roll Assembly
Drives printed pages into the OCT Tray, offsetting each from the normal position.
OCT Exit Sensor Assembly
Located between the Mid OCT Roll Assembly and the Exit Roll Assembly, it detects when
paper passes into the Tray Exit.
Home Sensor
The OCT Home Sensor detects when the Offset Roll Assembly is in the home position. It is
turned On when the Gear Core is located at the sensing point of the OCT Home Sensor.
Direction Solenoid and Lever
Switches the paper path between the normal paper path and the OCT paper path.
Figure 4 Major Components of the OCT (1 of 2)
Initial Issue
DocuPrint N2125
Figure 5 Major Components of the OCT (2 of 2)
Offset Catch Tray Control
Offset Motor Control
When the end of a sheet of paper reaches the OCT Exit Sensor Assembly, the sensor signal
goes Low. The Offset Motor Assembly begins rotating clockwise for a specified time after the
signal goes Low. This clockwise rotation shifts the sheet of paper from the normal position. At
the specified time after the Sensor Assembly Exit goes Low, the Exit Motor Assembly begins
rotating in the counterclockwise direction, moving the Offset Roll Assembly back into home
position, until the Sensor OCT Home signal (/OCT HOME) goes Low. When the power is first
switched on, the Offset Motor Assembly performs this offset operation once, to make sure the
Offset Roll Assembly is in the home position.
When the printer is running in Duplex mode, paper partially feeds out into the Face Down Tray
(under the OCT Assembly), it then reverses direction and is printed on the second side, then
sent to the Exit Tray of the OCT.
Full Stack Detection
The Print Engine Controller PWB examines the state of the Full Stack Sensor after the Sensor
Assembly Exit signal goes Low. The Print Engine Controller PWB detects that the Tray Exit is
full when the Full Stack Sensor remains High for a set number of successive Sensor Assembly
Exit actuations (sheets of paper exiting in the OCT). The Full Stack condition stays in affect
until the Full Stack Sensor goes Low.
Paper Jam Detection
The base printer and the OCT are designed to move a sheet of paper between the detecting
points, i.e. sensors, on the paper path within specific periods of time. If a sheet of paper is
either early or late arriving at any point, the Print Engine Controller PWB interprets this devia-
tion as a paper jam.
02/2000
6-43
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General Procedures / Information
GP 3.12