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D.
JAM DETECTION
The
copier has two
sensors
to sense
whether copy paper is being fed normally.
*
Pick-up unit paper sensor (Q2)
Delivery unit paper sensor (Q5)
Paper jams
can
be identified
by the
microprocessor by reading signals from the
*
sensors at predetermined times to check if.
paper is at or not at a sensor at that time,
and thus identify if the paper
is moving
through the copier correctly.
If a jam occurs, the copier memorizes
the number of copies that have not yet been
made
and
also the copier settings. This
information is stored in the copier for about
10 minutes, even if the power is cut off by |
opening the front goer in order to reset the
copier.
COPY START key
ON
The microprocessor identifies a jam in
any of the following four cases. Also, the
microprocessor judges that there is a jam
if one of the sensors detects paper when the
power is switched ON.
, (1) Pick-up unit stationary jam
If the copy paper does not pass the
paper sensor (Q2) in the pick-up unit
within the specified period after paper
pick-up starts, the microprocessor will
judge that a stationary
jam has occurred
and immediately stop the operation of
the. copier. Also, the JAM
indicator on
the control panel will flash and a seg-
ment
of the JAM
POSITION
indicator
will go ON.
JAM indicator flashes
tf sae
Des
ee
SCRY|
SCFW_
[cRV
(
PICK-UP roller clutch solenoid (SL1) |
1,3 seconds
Ls
Jam check
1,3 seconds
—
PICK-UP UNIT PAPER SENSOR (Q2)
signal
Main motor (M1)
Abnormal
Figure 3-35
Pick-up unit stationary jam
COPYRIGHT © 1988 CANON INC.
CANON NP-1215 REV.0 MAR. 1988 PRINTED IN JAPAN (IMPRIME AU JAPOR)
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