HP Designjet L25500 Printer Series - Maintenance and troubleshooting guide (second edition)

7. Rub the sponge against the contacts with a light force along the entire depth of the flex connector,
inserting the wiper as far as allowed by the mechanical stop on the tool.
8. Take special care to clean all contacts thoroughly, including the ones at the lowest point of the
connector.
9. Using the same sponge, clean the lower strip of electrical contacts on the printhead (unless the
printhead is new). Avoid touching the upper set of electrical contacts.
CAUTION: Do not touch the surface of the printhead that contains the nozzles, because the nozzles
are easily damaged.
10. After waiting a few moments to allow both connectors to dry, replace the printhead into the printhead
carriage. See the User's guide.
11. After completing the cleaning process, open the carriage interconnect wiper by pulling on the sponge
tab.
14 Chapter 4 Hardware maintenance ENWW