Lexmark Optra C Service Manual page 68

5045-001
OHP Sheet Detection (transparency)
When an OHP sheet is used for this printer, the dedicated one must
be used with a white band at its leading edge. The following
determinations are made by measuring the time period that light
emitted from the paper top sensor (PS303) is shielded by this band,
and whether it is:
•
The dedicated OHP sheet, any other OHP, or paper.
•
Placed with the proper side up.
•
Placed with the proper edge leading.
If any non-dedicated OHP sheet is used or the dedicated OHP sheet
is placed with the wrong side up or the wrong end leading, the
mechanical controller will notify the DC controller which will signify it
as a jam.
The white band disappears when heated in the fusing process.
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