Jam detection The paper-out sensor (PS201) detects the presence of media in either the priority input tray or the main input tray. The top-of-page sensor (PS402) and the paper delivery sensor (PS401) detect media moving through the printer. If a jam is detected, the ECU immediately stops the printing process and displays a jam message on the control panel. A jam can be detected under any of the following conditions: Pickup delay jam— Media does not reach the top-of-page sensor (PS402) after the pickup solenoid (SL001) has been turned on twice (the original pickup plus a retry) within 2.8 seconds.
Pickup stationary jam— The top-of-page sensor (PS402) does not detect the trailing edge of media within 4.6 seconds of detecting the leading edge. Delivery-delay jam— The paper delivery sensor (PS401) does not detect the leading edge of media within 2.1 seconds after the top-of-page sensor (PS402) detects the leading edge. Wrapping jam— The paper delivery sensor (PS401) does not detect the trailing edge of the media within 1.5 seconds after the top-of-page sensor (PS402) detects the leading edge and within ten seconds after the paper delivery sensor (PS401) detects the leading edge.
Delivery-stationary jam— The paper delivery sensor (PS401) does not detect the leading edge of media within 2.2 seconds after the top-of-page sensor (PS402) detects the trailing edge. Residual paper jam— The top-of-page sensor (PS402) or the paper delivery sensor (PS401) detect media in the initial rotation period. 96 Chapter 4 - Operational overview EN