Jam detection
This device includes the following sensors for detecting paper:
●
Delivery tray paper full (SR1)
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Paper loop (SR4)
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Top-of-page (SR5)
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Fixing delivery (SR6)
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Delivery (SR7)
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Pre-feed (SR14)
The CPU determines whether or not a paper jam exists by checking if paper is present at the sensor at
the specified timing. The specified timing is stored in the CPU memory. If the CPU determines that a
jam has occurred, it stops the device operation and notifies the formatter.
Jam type Description Specified timing
(approximate)
Pickup delay The device performs retry control to retrieve the pickup delay jam caused
by the pickup sensor.
When SR5 does not detect the media leading edge within the specified
timing, the CPU executes the pickup operation twice under both cassette
pickup and Tray 1 pickup operations. If SR5 still does not detect the media
leading edge, the CPU notifies the formatter of a pickup delay jam.
T = 1.5 s (upper
cassette)
T = 2.8 s (lower
cassette)
T = 1.1 s
Pickup stationary When SR5 continues detecting paper for the specified timing after the paper
is originally detected, the CPU notifies the formatter of a pickup stationary
jam.
T = 0.4 s
Fuser delivery delay When SR6 does not detect paper within the specified timing after SR5
detects paper, the CPU notifies the formatter of a fuser delivery delay jam.
T = 1.5 s
Fuser stationary When SR6 does not detect the media trailing edge within the specified
timing after the SR5 detects the media leading edge, the CPU notifies the
formatter of a fuser stationary jam.
T = 2.3 s
Fuser wrapping When SR6 does not detect paper within the specified timing after it originally
detects paper, the CPU notifies the formatter of a fuser wrapping jam.
T = 0.7 s
Door open The CPU determines the door open jam when the cartridge door, face-up
bin, or cassette is detected as open.
N/A
Residual paper The CPU notifies the formatter of a residual paper jam when any of the
following sensors detect paper when the device is turned on, when the door
is closed, or when automatic delivery is completed.
●
SR4
●
SR5
●
SR6
●
SR7
●
SR14
ENWW Print engine 131
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