Canon NP-1010 Service Manual page 47

D. ADD PAPER/JAM
The copier is equipped with two sensors to detect the presence and absence of copy paper and
to'monitor whether the copy paper is fed normally.
-\,
.
Pick-up unit paper sensor (Q601)
.
Delivery unit paper,sensor 0301)
To detect'the presence and absence of copy paper, or jam, the microprocessor checks the state
of the sensors in response to the instructions stored in advance.
The copier is not designed to store the remaining number of copies at time'of a jam or copy
mode; as such, the settings are returned to standard when the copier is opened and closed for re-
moval of jams.
The microprocessor performs the following five ADD PAPER/JAM sequential operations and, in
addition, it identifies a jam if the sensor detects copy paper when the POWER switch is turned ON.
1 No First Paper (pick-up delay jam)
If the first copy paper fails to reach the pick-up unit paper sensor within the specified time (no
cassette in the copier or no paper in the cassette). an ADD PAPER condition is identified and the
main motor stops 0.5 seconds thereafter and the message ADD PAPER is indicated. If the sensor
detects copy paper before the 0.5~second period, a pick-up delay jam is identified and the message
JAM is indicated.
This ADD PAPER/JAM detection is not performed in the manual mode.
COPY START key COPY START key
COPY START key
ON
ON
I?
ON
ti
v
STBYl INTR ISCPw\
Pick-up roller clutch
solenoid (PUSL)
Paper check
Pick-up unit paper sensor
(0601)
I, 2.9 set--Y
4 Normal
Main mofor (Ml)
(Normal)
Figure 3-40
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Olnne
CANON INC.
CANON NP-1010 AN.0 DEC. 1988 PRINTED IN JAW (IMPRIME AU JAPONI
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