Brother International DCP-1400 Service Manual - Page 163

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Trouble (12) Faulty image registration (Leading edge of image starts too late on paper) Action to be taken At the printer side • Instruct the user not to load paper exceeding the limit on the paper cassette(s). • Instruct the user to use the recommended types of paper. • Replace the paper cassette(s). • Check the position of the registration sensor. • Replace the drive gear ASSY. (13) Image distortion or improper image alignment (14) Blurred at either side In communications Check the following components: - Error code displayed. (Refer to Section 1, "ERROR INDICATION" in this chapter.) - NCU PCB - Main PCB At the scanner Check the following components: - ADF unit - CCD motor and its harness - Main PCB At the printer side • Check that the laser unit is secured with the screws without looseness. • Check the connection of the polygon motor harness on the engine PCB. • Check the connection of the laser flat cable on the main PCB. • Replace the laser unit. At the printer side • Check that the machine is placed on a flat surface. • Shake the toner cartridge horizontally. If the problem persists, replace it. • Clean the laser beam window (glass) on the laser unit. • Replace the laser unit. VI - 25

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Trouble
Action
to
be
taken
(12)
Faulty
(Leading
starts
image
registration
edge
of
too
late
on
image
paper)
At
the
printer
side
•
Instruct
the
user
not
to
load
paper
exceeding
the
limit
on
the
paper
cassette(s).
•
Instruct
the
user
to
use
the
recommended
types
of
paper.
•
Replace
the
paper
cassette(s).
•
Check
the
position
of
the
registration
sensor.
•
Replace
the
drive
gear
ASSY.
(13)
Image
improper
distortion
or
image
alignment
In
communications
Check
the
following
components:
-
Error
code
displayed.
(Refer
to
Section
1,
"ERROR
INDICATION"
in
this
chapter.)
-
NCU
PCB
-
Main
PCB
At
the
scanner
Check
the
following
components:
-
ADF
unit
-
CCD
motor
and
its
harness
-
Main
PCB
At
the
printer
side
•
Check
that
the
laser
unit
is
secured
with
the
screws
without
looseness.
•
Check
the
connection
of
the
polygon
motor
harness
on
the
engine
PCB.
•
Check
the
connection
of
the
laser
flat
cable
on
the
main
PCB.
•
Replace
the
laser
unit.
(14)
Blurred
at
either
side
At
the
printer
side
•
Check
that
the
machine
is
placed
on
a
flat
surface.
•
Shake
the
toner
cartridge
horizontally.
If
the
problem
persists,
replace
it.
•
Clean
the
laser
beam
window
(glass)
on
the
laser
unit.
•
Replace
the
laser
unit.
_______
_____
--------
_____
-------
-------
_____
._______
_______
------
______.
________.
----------
________.
-------.
-------.
_______...
_________.
_______.
-------.
VI
-
25