HP Designjet 4000 Printer Series - Quick Reference Guide

3. Load the sponge into the carriage interconnect wiper by positioning the sponge
on the face of the carriage interconnect wiper with the shorter tab in the locating
slot.
4. Close the carriage interconnect wiper, trapping the sponge in place.
5. Open the printhead carriage latch and extract the printhead that has the problem,
as indicated on the front panel. See “How do I remove a printhead?” on page 44.
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How do I handle the ink system?