QMS Magicolor WX User Manual page 216

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If a media jam message displays in the control panel message
window, clear the jam using the appropriate procedure from
"Clearing Media Jams" on page 7-18. If the message is still there,
make sure the cassettes have the correct size media, the size key
slide on the back end of the cassette is set correctly, and all cov-
ers and doors are completely closed.
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If the message displays when no jam is evident, make sure the
media size and type currently in the cassette are selected in the
printer driver. (See chapter 2, "Printing," for information on using
the printer driver.)
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As a last resort, try turning the printer off and on (this will cause
jobs to be lost).
If ENGINE ERROR E9 displays in the control panel message window,
use the following procedure to reseat the drum:
1 Open the back cover of the printer.