Canon NP6320 Service Manual page 237

3. Jamming in the fixing and paper delivery assembly area
Cause
Delivery assem-
bly separation
claws
Upper and
lower fixing
rollers
Paper guide
plate
Nip width
Delivery pa-
per sensor
arm
Delivery
paper sensor
(Q5)
Delivery
roller drive
assembly
Leading edge
blank area
4. Jamming around the drum cleaning unit area
Cause Step
Copy paper
Static charge
eliminator,
High-voltage
transformer
COPYRIGHT © 1999 CANON INC.
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Step
1 Are the separation claws worn or de-
formed?
2 Is the upper or lower fixing roller de-
formed or scratched?
3 Is toner, etc., adhering to the paper
guide?
4 Is the height of the paper guide plate
correct?
5 Is the roller pressure (nip width) within
the standard?
6 Does the delivery sensor arm move
smoothly?
7 Is the delivery paper sensor function-
ing correctly? (See p. 10-21.)
8 Do the delivery rollers rotate
smoothly?
1 Does jamming occur when thin paper is
used?
2 Did a jam occur when a 2-sided or overlay
copy was being made?
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Checks
Checks
YES/
Action
NO
YES 1.Replace the separation
claws.
2.If the separation claws
are soiled, clean them
with MEK.
YES Replace the upper and
lower fixing rollers (both
at the same time).
YES Clean the paper guide
plate with MEK.
NO Adjust the height of the
paper guide plate.
NO Adjust the nip width.
NO Adjust the arm so that it
moves smoothly.
NO Replace the delivery pa-
per sensor (Q5).
NO Check the delivery roller
drive assembly.
YES Check if there is a lead-
ing edge blank area (2.0
+1.5 mm) on the leading
edge of the copy paper.
YES/
Action
NO
YES Explain to the user that
thin paper is likely to
jam.
YES Instruct the user to re-
move curling from the
copy paper before using
it.
NO Check if voltage is being
supplied to the static
charge eliminator.
10-59