Jam detection
The top-of-page sensor (PS801) and the paper delivery sensor (PS803) detect media moving
through the printer. If a jam is detected, the ECU immediately stops the printing process and
displays the a jam light on the control panel.
Conditions of jam detection
● Pickup delay jam—Paper does not reach the top-of-page sensor (PS801) within 1.4
seconds after the pickup solenoid (SL1) has been turned on, a second pickup operation
is attempted, and paper again does not reach the top-of-page sensor within 1.4
seconds..
● Pickup stationary jam—The top-of-page sensor (PS801) does not detect the trailing
edge of media within 4.6 seconds of detecting the leading edge.
● Delivery-delay jam—The paper delivery sensor (PS803) does not detect the leading
edge of media within 2.1 seconds after the top-of-page sensor (PS801) detects the
leading edge.
● Wrapping jam—The paper delivery sensor (PS803) does not detect the trailing edge of
the media within 1.5 seconds after the top-of-page sensor (PS801) detects the leading
edge and within ten seconds after the paper delivery sensor (PS803) detects the leading
edge.
● Delivery-stationary jam—The paper delivery sensor (PS803) does not detect the
leading edge of media within 2.2 seconds after the top-of-page sensor (PS801) detects
the trailing edge.
● Residual paper jam—The top-of-page sensor (PS801) or the paper delivery sensor
(PS803) detect media in the initial rotation period.
● Door open jam—The top-of-page sensor (PS801) or the paper delivery sensor (PS803)
detect media while the print cartridge door is open.
Solenoid, sensors, and switches
The following figure shows the locations of the solenoid, sensors, and switches.
46 Chapter 4 Operational overview ENWW
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