HP Designjet 4520 Printer series - Manual (Page 110)

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 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 on page 94 .
11. On completion of the cleaning process, open the carriage interconnect wiper by pulling on the
sponge tab.
100 Chapter 9 How do I... (ink system topics) ENWW
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