Paper Size Detection - Canon LBP-860 Service Manual

The pick-up and delivery units have
paper. If the print does not reach or clear
each sensor within a preset time, the
microprocessor on the DC controller
assumes a paper jam has occurred. The
DC controller notifies the video controller
of the jam.
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B. Paper Size Detection
Loading the cassette in the printer feeder
actuates specific switches. From the
combination of actuated switches (Table 2.
3). the microprocessor on the DC controller
detects the cassette size and the presence
of a cassette.
Table 2-3
cassette
No
This printer cannot detect the paper size
on the multi-purpose tray until the first
page has been printed.
universal cassette is used. the user sets
the cassette size, so there may be a setting
error.
The paper size is detected by the multi-
purpose tray paper end sensor (PS701) if
paper is fed from the multi-purpose tray,
and by the resist paper sensor (PS602) if
paper is fed from the cassette. If the paper
video controller. the microprocessor reports
a paper size error to the video controller.
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