Stylus Photo R1900/R2880/R2000/R2000s/SC-P400 Series  Revision I
Stylus Photo R2000/R2000s  Adjustment  198
Figure 8-18.  Pattern for Multi Sensor Adjustment (Ink Mark Sensor adjustment)
No dot missing patterns
Eight dot missings patterns
(Dot-missing counts)
The counts show Sensor could recognize the Dot missing for 
each color.
Count-Alignment : Y - M - Mk - R - Or - Pk - GO - C
Pattern-Alignment : 
Y - M - C - Mk 
Pk- R - Or 
Go