HP Color LaserJet 8550 Multifunction Printer series - Manual (Page 160)

EN Printer Messages 159
TRAY X TYPE =
<Type> This message is displayed
when media is placed in an
input tray.
X is the input tray number.
<Type> is the last media type
configured for the input tray.
Press -V ALUE + to view the
choices. Press S ELECT when
the choice you want is
displayed, and then press
G O
to bring the printer online. If
no key is pressed for 30
seconds after the media is
detected in the input tray, the
displayed type will
automatically be selected, the
message will be cleared, and
printing will begin.
WARMING UP The fuser is warming up. No action is required.
Message Description Recommended Action