Switch functionality The following table describes the functionality of the paper-size switches in the printer. Table 37. Tray 2 and Tray 3 paper-size detection Paper-size detection switches Paper size SW1601 SW1602 SW1603 SW1604 A3 Off On Off Off A4 (horizontal) Off Off On Off A4 (landscape) On Off Off On A5 Off Off On On B4 On Off Off Off B5 Off On Off On Ledger Off Off Off Off Legal On On Off Off Letter (horizontal) Off Off Off On 188 Chapter 5 - Theory of operation EN