Epson 440 Service Manual page 124

Stylus Color 600 Service Manual
Symptom
Abnormal printing Only a particular
dot
causes abnormal
printing.
A dot is not printed
occasionally.
Black specks or
dots.
A vertical line is not
aligned.
White line appears
in the image data.
5-14
Table 5-10. Repair of the Printer Mechanism (Con.)
Condition
Print head surface is
not clean.
(dot missing)
The head unit is
defective.
Capping absorber is
touching the head
surface.
Print head surface
is not clean.
(dot-missing)
The head FFC is
disconnected inside.
The head FFC is out
of connection.
The head unit is
detective.
I/C is defective.
The head FFC is out
of connection.
The head unit is
detective.
Bi-directional
alignment is not
adjusted.
Head angle is not
correct.
Platen gap is not
correct.
Dot shooting
direction is tilted
because head
surface is not clean
I/C is defective.
Head unit is
defective.
Cause Check-point
Perform the cleaning
operation several
times and check
printing.
Perform the cleaning
operation several
times and check
printing.
Check the head
absorber visually.
Perform the cleaning
operation several
times and check
printing.
Check the FFC by
using a tester.
Check if the head
FFC on the board or
carriage is
connected surely.
Perform the cleaning
operation several
times and check
printing.
Install the new I/C
and perform self-
test.
Check if the head
FFC on the board or
carriage is
connected surely.
Check connection
with the head FFC.
Perform Bi-D
adjustment.
Perform head angle
adjustment.
Perform platen gap
adjustment.
Perform the cleaning
operation several
times and check
printing.
Install a new I/C and
perform the self-test.
Perform the cleaning
operation several
times and check
printing.
Solution
Perform the
cleaning.
If condition does not
improve even after
the cleaning, replace
the head.
Replace the head
absorber if it is
deformed.
Perform the
cleaning.
Replace the head
FFC.
Connect the FFC
properly.
If condition does not
improve even after
the cleaning, replace
the head.
Replace I/C.
Connect the FFC
properly.
Replace the head if
there is no
connection problem
with the FFC.
Refer to Chapter4.
Refer to Chapter4.
Refer to Chapter4.
Perform the
cleaning operation.
Replace I/C.
Replace the head
unit.
Rev. A