Epson Stylus Color 880, Service Manual

Page: 140 / 179

EPSON Stylus COLOR 880 Revision A
Adjustment Individual service adjustment program feature 140
5.4.6 A4 Check pattern
We recommend to use this function to check the repaired product quality in
your final stage of your repair. The following 11 items are printed on the check
pattern.
Figure 5-45. 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
„
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
„
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.
„
The check point for the third Alignment pattern is as
follows.
- Each vertical line is printed straight.
„
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.