Epson Stylus Pro 7400 Service Manual page 206

EPSON Stylus Pro 7400/7800/9400/9800
VERTICAL BANDS
When bands (inconsistencies in density, or partly grainy) appear on the printed images
in the paper feeding direction, check the following items.
Bi-D Adjustment
Carry out the Bi-D Adjustment using any one of the following tools.
HEAD ALIGNMENT in the Panel Setting menu
Printer driver
Adjustment Program
If the bands still appear even after the adjustment, fine-tune the setting value (plus or
minus 0.1 to 0.2 mm) for the THICKNESS NUMBER in the CUSTOM PAPER in the
Panel Setting menu.
INTRUSION OF AIR INTO THE INK TUBE
If intrusion of air into the Ink Tubes can be confirmed visually, perform the following
cleaning.
Cleaning
Power cleaning Panel setting menu or Maintenance menu
Adjustment Program: CL4
Troubleshooting
How to Run the Cleaning
POWER CLEANING
Troubleshooting based on Printed Result
Revision B
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