Epson Stylus C40UX, Service Manual

Page: 85 / 125

Stylus C40UX/C40SX/C20UX/C20SX Revision B
Adjustment Overview 85
5.1.6 Bi-D
You perform this adjustment to correct differences in printing positions, which is
caused by incorrect of 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
„
Replacing the main board
„
Replacing the CR motor
„
Replacing the Printhead
1. Choose the “Bi-D” in the “Adjustment menu” as following figure.
Figure 5-10. Choose the Bi-d adjustment
2. Choose the “Print the Bi-d adjustment pattern” in the “Bi-Directional Adjustment
pattern” and click the “OK” button.
Figure 5-11. Bi-d adjustment pattern
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.
3. Click the “Previous” and go back to the “BI-Directional Adjustment” menu. And
choose the “Adjust” menu and click the “OK” button.
4. Check the printed pattern and find the misaligned dot type.
Choose the
misaligned dot size in the following menu and click the “OK” button.
Figure 5-12. Choose the misaligned dot size