The Drop detector sensor has detected particles, ex: hair, paper
Last updated: February 22, 2026
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HP 5000 - 5500 Designjet Printer printhead error 0020 0021 0022 0023 0024 0025
1st Call 4 Service called into an HP 5500 42" Designjet printer with an air leak in the yellow line of the tube system, causing air ...
The Drop detector sensor has detected particles, ex: hair, paper
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Restart, Cleaning process needed. Clean the Drop Detector, Check printhead health, clean dirty encoder, run diagnostics, replace drop detector, replace service station PCA.
Reference diagrams for common repair procedures related to this error:
Carriage Belt Replacement
Note: These diagrams are for reference only. Always consult official HP service documentation and follow proper ESD precautions.
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Optical or mechanical sensors that detect the presence, type, width, and position of print media loaded in the printer.
Paper with a special coating that improves ink adhesion, color vibrancy, and sharpness compared to uncoated (plain) paper.
The motor responsible for feeding media through the printer in precise increments between each pass of the printhead carriage.
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