Brother MFC-8510DN - Manual (Page 20)

Chapter 1
8
Data LED indications
1
The Data LED (light emitting diode) will flash depending on the machine’s status.
LED Machine Status Description
Ready Mode The machine is ready to print, in Sleep mode, there is no print
data, or the power switch is off.
Green
(blinking)
Receiving Data The machine is either receiving data from the computer,
processing data in memory, or printing data.
Green
Data Remaining in
Memory Print data remains in the machine's memory.