Operational Check Of Lcd (Function Code 12) (User-Accessible) - Brother MFC5490CN Service Manual

9.4.6 Operational Check of LCD (Function code 12) (User-accessible)

Function
This function allows you to check whether the LCD works normally.
Operating Procedure
(1) Press the 1 and 2 keys in this order in the initial stage of the maintenance mode.
(2) Press the Black Start (Mono Start) key. The LCD shows the screen given below.
(3) Each time you press the Black Start (Mono Start) key, the LCD cycles through the
displays as shown below.
Black Start (Mono Start) key
Black Start (Mono Start) key
Black Start (Mono Start) key
(4) Press the Stop/Exit key in any process of the above display cycle. The machine returns to
the initial stage of the maintenance mode.
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