EPSON Stylus Color 440/640/740
Revision A
Chapter 3
Troubleshooting
97
Abnormal printing
Only a particular dot
causes abnormal
printing.
Print head surface is not
clean.
(dot missing)
Perform the cleaning operation several
times and check printing.
Perform the cleaning.
The head unit is defective.
Perform the cleaning operation several
times and check printing.
If condition does not improve even
after the cleaning, replace the head.
Capping absorber is
touching the head surface.
Check the head absorber visually.
Replace the head absorber if it is
deformed.
A dot is not printed
occasionally.
Print head surface is not
clean. (dot-missing)
Perform the cleaning operation several
times and check printing.
Perform the cleaning.
The head FFC is
disconnected inside.
Check the FFC by using a tester.
Replace the head FFC.
The head FFC is out of
connection.
Check if the head FFC on the board or
carriage is connected surely.
Connect the FFC properly.
The head unit is detective.
Perform the cleaning operation several
times and check printing.
If condition does not improve even
after the cleaning, replace the head.
I/C is defective.
Install the new I/C and perform self-test.
Replace I/C.
Black specks or dots.
The head FFC is out of
connection.
Check if the head FFC on the board or
carriage is connected surely.
Connect the FFC properly.
The head unit is detective.
Check connection with the head FFC.
Replace the head if there is no
connection problem with the FFC.
A vertical line is not
aligned.
Bi-directional alignment is
not adjusted.
Perform Bi-D adjustment.
Refer to Chapter4.
White line appears in
the image data.
Head angle is not correct.
Perform head angle adjustment.
Refer to Chapter4.
Platen gap is not correct.
Perform platen gap adjustment.
Refer to Chapter4.
Dot shooting direction is
tilted because head
surface is not clean
Perform the cleaning operation several
times and check printing.
Perform the cleaning operation.
I/C is defective.
Install a new I/C and perform the self-test.
Replace I/C.
Head unit is defective.
Perform the cleaning operation several
times and check printing.
Replace the head unit.
Table 3-7. Repair of the Printer Mechanism
Symptom
Condition
Cause
Check Point
Solution
Содержание Stylus Color 440
Страница 1: ...EPSONStylusColor440 640 740 Color ink jet printer 4009667 ...
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Страница 129: ... ADJUSTMENT ...
Страница 153: ... MAINTENANCE ...
Страница 160: ... APPENDIX ...
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