malfunction in Drop Detector
Last updated: February 22, 2026
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Ultimate Fix for DesignJet T730 T830 Error 009-0021 Scanner PCA Board
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malfunction in Drop Detector
- 1
Restart the device. Run the 02101 Check Electronics service diagnostic test . Replace the Drop Detector. Replace the 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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