Epson Stylus Pro 7400 Service Manual page 114

EPSON Stylus Pro 7400/7800/9400/9800
Head Nozzle Check
This function allows you to check the nozzles by a printed pattern if they discharge ink
normally. Load paper on the printer before executing the check.
If a "Ink Low" or "Ink Out" status is detected, the printer requires to replace the ink
cartridge before printing the pattern.
NOTE: The pattern is printed even if the initial ink charge is not performed yet.
Head nozzle check pattern
Items to be checked
Discharging conditions (dot missing, broken lines, meandering)
•
• Satellite
• Timing Fence
Horizontal alignment
•
• Vertical alignment
Pattern (See Table 1-56 (p.115)
which nozzles)
Ink discharging check
•
The pattern is printed in the order of E, F, G, H, D, C, B, and A row from the
left.
Print mode: 360dpi, Uni-D, VSD1, 320cps, Small
Printed
Information
Version Firmware version currently installed on the printer
Maintenance Tank Available capacity of the Maintenance tank
HeadRank ID Head rank ID stored on the printer
Color ID Colorimetric calibration values stored on the printer
Figure 1-24. Head Nozzle Check Pattern
Product Description
for details on which color is discharged from
Description
Horizontal alignment check
•
The pattern is printed in the order of E, F, G, H, D, C, B, and A row from the
left.
Print mode:
360dpi, Uni-D, 320cps, VSD1, Large
360dpi, Uni-D, 320cps, VSD2, Large
360dpi, Uni-D, 320cps, VSD3, Large and Middle is printed alternately
Figure 1-25. Horizontal Alignment Check Pattern
• Vertical alignment check
First the pattern is printed in the order of E, F, G, H, D, C, B, and A row
from the left while the Carriage moves from its home to the anti-home end.
And while the Carriage is returning to the home, the pattern is printed in the
reverse order.
Print mode: 360dpi, Bi-D, 320cps, VSD1
360dpi, Bi-D, 320cps, VSD2
360dpi, Bi-D, 320cps, VSD3
(Large, middle, and small dot sizes used in that order in each
mode.)
Home to Anti-home side
Figure 1-26. Vertical Alignment Check Pattern
Control Panel
Revision B
Anti-home to Home side
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