HP Officejet Pro 276dw Multifunction Printer series - Manual (Page 17)

Printing supplies area
1 Ink cartridge access door
2 Ink cartridges
3 Printhead
4 Printhead latch
Back view
1 Fax port (2-EXT)
2 Fax port (1-LINE )
3 Ethernet network port
4 Rear universal serial bus (USB) port
5 Power input
Understand the printer parts 13