Specifications

Additional Procedures Printer Tests - 8
Interpreting the Diagnostic Test (Continued)
Print Cartridge
• Nozzle Patterns: The black and colored nozzle test patterns verify that dots on each print
cartridge are firing correctly. If dots are missing, refer to the “Print Quality” section in
Troubleshooting.
• Banding Test: If the nozzle test passes, the dark patches of the banding test should be
relatively smooth and uniform. Horizontal bands of lighter and darker areas indicate line feed
errors from drag, worn mechanical parts, or cartridge errors.
• Left/Right Registration Test: The left/right registration test measures the printer’s ability to
print a smooth vertical line. Half of the line is printed while the carriage moves to the left, the
other half, while the carriage moves to the right. The line should be straight without gaps;
otherwise, the encoder strip, carriage motor, drive belt, paper motor, or main logic board could
be damaged.
• Print Skew Test : The print skew test measures the print margins to ensure the paper moves
through the printer properly and printing does not appear tiltled.