Media detection
The product automatically selects an optimal print mode for a print-media by monitoring the media
sensors in the paper path.
Media detection sensor types
●
Reflected light type (detects the glossiness of paper)
●
Transmitted light type (detects the thickness of paper)
The DC controller detects the type of print-media by the reflected light and the transmitted light, and
switches the print modes accordingly. The DC controller identifies the following paper types:
●
Plain paper
●
Light paper
●
Heavy paper
●
Glossy paper
●
Glossy film
●
Overhead transparency (OHT)
The DC controller determines a media mismatch error and notifies the formatter under the following
conditions:
●
Simplex printing
◦
The specified print mode is OHT, but the media sensor detects media other than an overhead
transparency.
◦
The specified print mode is something other than OHT, but the media sensor detects an
overhead transparency.
●
Duplex printing
◦
The specified print mode is for duplex-printable-print mode, but the media sensor detects an
overhead transparency. For more information about duplex-printable mode, see
Duplex Block
on page 63.
The DC controller flashes the media sensor during the initial rotation period under the following
conditions:
●
Product power is turned on.
●
The door is closed.
The DC controller determines a media sensor abnormality and notifies the formatter when the light
intensity is out of a specified range.
58 Chapter 1 Theory of operation ENWW
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