Switches output destinations for received fax.
Check that the rear output tray on the rear side of the machine is closed.
If the rear output tray is opened, paper is always output to the rear output tray.
If paper remains on the upper output tray, LED flashes.
Not to flash LED, from [Device Settings] > [Admin Setup] > [Management] > [System Setup], set [Output Tray Paper Exist Lamp] to [Disable].