Chapter 1 Product Overview Back Self-test button 1 Rear cover Connectors Cable hook Rear cover Remove it to connect the cables, or perform the self-test (only for the Ethernet interface model). Cable hook Hooks the cables to fix them. Self-test button (only for the Ethernet interface model) For the Ethernet interface model, press this button to print the network setting information and the nozzle check pattern. For details, see "Self-test" on page 94 . 19