HP Designjet 4500 Printer series - Manual (Page 201)

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 containing the nozzles, which are
easily damaged.
10. After waiting a few moments to allow both connectors to dry, replace the printhead into the
printhead carriage. See Insert a printhead.
11. On completion of the cleaning process, open the carriage interconnect wiper by pulling on the
sponge tab.
12. Remove the soiled sponge from the carriage interconnect wiper.
ENWW Clean a printhead's electrical connections 187
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