Canon Satera LBP9500C User Manual page 129

For details on solutions for when messages about toner appear, such as <
Appears," on p. 107.
Message
<Warning Message>
<Warning Message>
<Warning Message>
<Warning Message>
128
> or <
Cause The amount of the paper loaded in Cassette N (N
= 2, 3, 4) exceeds the load limitation.
Solution 1 Reduce the amount of the paper in Cassette N (N
= 2, 3, 4).
Solution 2 Press [
Cause The ITB unit needs to be replaced soon.
Solution Although you can continue to print for a while,
have ready a new ITB unit.
Cause The waste toner container needs to be replaced
soon.
Solution Although you can continue to print for a while,
have ready a new waste toner container.
Cause The fixing unit needs to be replaced soon.
Solution Although you can continue to print for a while,
have ready a new fixing unit.
Cause The ITB unit is not installed.
Solution Install the ITB unit.
>, see "When a Message
Cause and Solution
] to select another paper source.