The paper size specified in the printer driver is too small for the machine to deliver it to the face-down output tray.
Open the back cover (back output tray / face-up output tray) to let the printed paper out on the back output tray / face-up output tray and then press Go, Black (Mono) Start or Color (Colour) Start.
NOTE: Illustration shown below is from a representative product and may differ from your Brother machine.
HL-3140CW, HL-3170CDW, HL-3180CDW, HL-4150CDN, HL-4570CDW, HL-4570CDWT, HL-S7000DN, MFC-9130CW, MFC-9330CDW, MFC-9340CDW, MFC-9460CDN, MFC-9560CDW, MFC-9970CDW
If you need further assistance, please contact Brother customer service:
Please note this form is used for feedback only.