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ERROR CODE and TROUBLESHOOTING
8 - 296
8.5.2 Uneven pitch and jitter image
<Symptoms>
Original mode Location Phenomena
All modes Occurs cyclically at
right angles to paper
feeding direction
Uneven
pitch
Fig.8-10
Cause/Section Step Check item Measures Remarks
1 Test printing (A3/LD) Output the built-in
halftone and grid
patterns.
For the following
checks
2 Are there uneven pitches of
approx. 188.5 mm?
Perform procedures 5,
6 and 7.
Are there uneven pitches of
approx. 26 mm?
Perform procedure A.
3 This jittery image occurs in
certain positions from the leading
edge of the paper when the
continuous printing is performed.
This occurs at the position
178.277mm from the edge of the
image when printed in black,
283.382mm in cyan, and 388mm
in magenta.
Perform procedures 8,
9 and 10
Jittering caused
by the impact of
the paper going
into the 2nd
transfer section.
4 This jittery image occurs in
certain positions from the leading
edge of the paper on the second
and subsequent pages when
continuous printing is performed.
The position of the jittery image
varies depending on the copying
speed, paper size, and color.
Perform procedures 8
and 11
Jittering caused
by the impact of
the paper
passing through
the registration
roller and 2nd
transfer roller
Drum 5 Is there any damage or foreign
matter on the drum surface?.
Clean or replace the
drum.
Replace the
drum first,
because in some
cases, scratches
cannot be
visually checked.
Drum drive 6 Is there any dent, damage or
deformation on the gears of the
drum drive unit?
Replace the drum
drive unit.
A Is there any dent, damage or
deformation in the motor gear
section of the drum drive unit?
Replace the drum
motor.
Fuser belt 7 Check if the fuser belt is
scratched or deformed.)
Replace the fuser belt.
Feeding
direction
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