HP Deskjet D1420 Printer - Manual (Page 51)

5. Remove the replacement print cartridge from its packaging and carefully remove the
plastic tape. Hold the print cartridge so that the copper strip is on the bottom and
facing toward the printer.
1 Remove plastic tape
CAUTION: Do not touch the print cartridge ink nozzles or copper contacts.
Touching these parts will result in clogs, ink failure, and bad electrical connections.
Do not remove the copper strips. They are required electrical contacts.
1 Ink nozzles
2 Copper contacts
6. Slide the print cartridge firmly into the cradle at a slight upward angle until you feel
resistance.
Install print cartridges 49