Epson DX5 X 2 Calibration And Maintenance page 12

Align the physical vertical position of printhead.
The first pass line is the reference; observe whether the second pass line is perfectly aligned with the first pass
line. If not, then we need to adjust the carriage plate. There are 3 situations:
1) The two pass is perfectly aligned, no need to adjust:
Second pass
First pass
No need to adjust
2) The second is on the left side of the first pass:
Second pass
First pass
Adjust method:
A. Loosen the 3 screws on the carriage plate
3) The second is on the right side of the first pass:
Second pass
First pass
B. Turn the screw clockwise:
12