Canon LBP3900 Printer User Manual


 
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Cause The front cover is open, or the sub-output tray is
open to the position shown in the figure.
Remedy Close the front cover firmly or close the
sub-output tray to the position shown in the figure.
If the printer is not online, press [
].
Cause Paper is jammed inside the printer.
Remedy Remove the jammed paper and set the paper
cassette and covers to the original position. If the
printer is not online, press [
].
Cause The toner cartridge is not installed or installed
improperly.
Remedy Install the toner cartridge properly.
<Warning Message>
Cause Toner is running out.
Remedy Although you can continue to print for a while,
have ready a new toner cartridge. When you print
a large amount of data, or white patches appear
on the images, replace the toner cartridge with a
new one. If the printer is not online after closing
the front cover, press [
].
Message
Cause and Remedy