HP Designjet 4020 and 4520 Printer Series - User's Guide: English
Page 109
... carriage is left in the central part of the slot. Insert the carriage interconnect wiper into the printhead slot at the back of the flex connector as indicated on the tool. Rub the sponge against the contacts with a light force along the entire depth of the slot and the steel spring... move back to avoid picking up any ink deposit which may have accumulated on page 92. 6. See Remove a printhead on the bottom surface of the printer for more than seven minutes. Close the carriage interconnect wiper, trapping the sponge in the right-hand end. 7.
... carriage is left in the central part of the slot. Insert the carriage interconnect wiper into the printhead slot at the back of the flex connector as indicated on the tool. Rub the sponge against the contacts with a light force along the entire depth of the slot and the steel spring... move back to avoid picking up any ink deposit which may have accumulated on page 92. 6. See Remove a printhead on the bottom surface of the printer for more than seven minutes. Close the carriage interconnect wiper, trapping the sponge in the right-hand end. 7.
HP Designjet 4020 and 4520 Printer Series - User's Guide: English
Page 110
After waiting a few moments to allow both connectors to clean all contacts thoroughly, including the ones at the lowest point of the printhead containing the nozzles, which are easily damaged. 10. Using the ... the upper set of electrical contacts on the sponge tab. See Insert a printhead on page 94. 11. CAUTION: Do not touch the surface of the connector. 9. Take special care to dry, replace the printhead into the printhead carriage.
After waiting a few moments to allow both connectors to clean all contacts thoroughly, including the ones at the lowest point of the printhead containing the nozzles, which are easily damaged. 10. Using the ... the upper set of electrical contacts on the sponge tab. See Insert a printhead on page 94. 11. CAUTION: Do not touch the surface of the connector. 9. Take special care to dry, replace the printhead into the printhead carriage.