Canon LBP-860 Service Manual page 82

CHAPTER 2
NU NO UPPER CASS.
o c
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Upper cassette installation request
Paper cannot be fed from the lower
cassette because the upper cassette Is
not loaded.
Operator comment
(User-defined operator call)
XX..
Display Comment 1 command. This
command sends the message from the
external device Lo the printer.
Load the upper cassette, or
select another paper
specified by the