Cause of error code TRAY 1 SIZE = [xxxx]

The printer is asking what size of media has been loaded in tray 1.

Solution for error code TRAY 1 SIZE = [xxxx]

In response, you can take either of the following actions: 1. Press SELECT to accept the paper size. 2. Press -VALUE+ to change the size and then press SELECT to accept the new size. The printer will first display the TRAY 1 TYPE = XXXX message (see the description of that message). If you do not press any buttons in the time-out period (about one minute), it displays this TRAY 1 SIZE = XXXX message. Changing the size here changes the default for tray 1 paper size in the paper-handling menu.