Epson Stylus COLOR 660 Service Manual page 33

EPSON Stylus Color 660
5.2.1.9 Bi-D Adjustment
You perform this adjustment to correct differences in printing positions,
which is caused by incorrect printing timing in right and left directions
during the Bi-directional printing. Therefore, you are required to perform
this adjustment after performing the following operations.
Replacing the Print mechanism
n
Replacing the main board
n
Replacing the CR motor
n
Replacing the Carriage Assembly
n
Replacing g the Printhead
n
1. Select "Bi-Directional Adjustment" in the adjustment menu (Figure
5-16). The following screen appears.
Figure 5-25. Bi-D Adjustment Menu
Chapter 5 Adjustment
2. Select "Print the Bi-D adjustment pattern" on the screen, and the
screen bellow appears.
Figure 5-26. Print the Bi-D pattern
3. Click OK. The printer starts printing a Bi-D adjustment pattern. (See
the sample pattern in the following page.)
NOTE: As shown in the sample, gaps between passes are
sometimes created in different directions among patterns.
This unexpected change in direction is caused by an ink jet
printer-specific reason, which is an ink jet printer inevitably
performs a periodical cleaning specified by the flashing timer
even during Bi-D pattern printing, so that the printing
direction suddenly changes. However, this directional
difference among Bi-D patterns should not be considered,
and you can always confirm and adjust the pattern correctly
by referring to gap amount only.
Revision A
33