Epson STYLUS COLOR 480, Service Manual

Page: 120 / 149

EPSON Stylus COLOR 480 Revision B
Adjustment Individual service adjustment program feature 120
5.3.7 A4 Check pattern
We recommend to use this function to check the repaired product quality in your final
stage of your repair. The following 6 items are printed on the check pattern.
Figure 5-52. A4 Check pattern
Figure 5-53. A4 Check pattern
C A U T I O N Do not print the A4 Check pattern on the EPSON exclusive paper
such as Photo quality ink jet paper. This check pattern is for the plain
paper. So, use the Plain paper for this check pattern printing.
C H E C K
P O I N T
n
The check point for the first black and each color solid pattern
(beta pattern 360 x 360dpi normal dot) in the A4 Check pattern
is as follows.
- Any white line is not observed
- Uneven banding is not observed extremely
n
The check point for the second Nozzle check pattern (120dpi) is
as follows.
- Ink is fired from all nozzles.
- Uneven banding is not observed extremely.
n
The check point for the third Alignment pattern is as follows.
- Each vertical line is printed straight.
n
If any incorrect printing is observed on the A4 Check pattern,
perform the head cleaning or bi-d adjustment. If the
phenomenon is not improved, replace the printhead or suitable
mechanical parts.