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 the jam light on the
control panel illuminates.
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 media jam—The top-of-page sensor (PS801) or the paper-delivery sensor (PS803)
detects media during 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.
ENWW Printer operation 53
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