Number of counts provided by Encoder strip less than expected
Last updated: February 22, 2026
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System error code: 86:01 on HP T790 T1300 T2300 Designjet Printer
System error code: 86:01 on HP T790 T1300 T2300 Designjet Printer See this video: https://youtu.be/Lhb-g4gKpKE Carriage ...
Number of counts provided by Encoder strip less than expected
- 1
Check/clean the Linear strip encoder. Check the Encoder strip integrated in Carriage PCA. Run the 08602 Check Mechatronics service diagnostic. Replace the Linear encoder strip. Replace the Carriage PCA.
Reference diagrams for common repair procedures related to this error:
Carriage Belt Replacement

Formatter Board Location & Connections

Note: These diagrams are for reference only. Always consult official HP service documentation and follow proper ESD precautions.
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A transparent plastic strip with precisely printed markings that the printer uses to determine the exact position of the carriage as it moves across the platen.
A numeric or alphanumeric code displayed on the printer's front panel or in diagnostic logs that identifies a specific hardware or software malfunction.
Software that converts vector graphics, text, and images into a raster (bitmap) format that the printer can output. Essential for processing complex design files.
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