Xerox 4400DT Service Manual - Page 454
Paper Jam Detection, Assembly Low after it has turned the Sensor Exit High. If the Sensor
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Paper Jam Detection The base printer and the Stacker 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 Engine Logic Board interprets this deviation as a paper jam. I E6-1 Jam - The specified time that the paper has to turn the Stacker Sensor Assembly Low after it has turned the Sensor Exit High. If the Sensor Assembly Exit does not go Low after the specified time, the Engine Logic Board detects that a Stacker jam has occurred. I E6-2 Jam - The specified time that the paper has to leave the stacker sensor, or the Stacker Exit Sensor is actuated at power-on. Phaser 4400 Laser Printer Service Manual 8-41
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