Operational Check Of Lcd And Specifying Of The Lcd Type (Function Code 12) (User-Accessible) - Brother MFC990CW Service Manual

9.1.4.6 Operational Check of LCD and Specifying of the LCD Type
(Function code 12) (User-accessible)
Function
This function allows you to check whether the LCD works normally. It should be used to
specify the LCD type if the 3.3-/4.2-inch color LCD unit or main PCB is replaced.
Operating Procedure
Checking the display state of the LCD
If the the 3.3-/4.2-inch color LCD unit or main PCB has been replaced, first specify the LCD
type using the procedure given on the next page before proceeding to the following steps.
(1) Press the 1 and 2 keys in this order in the initial stage of the maintenance mode. For models
without numerical keypad, enter 1 and 2 using the
(2) Press the
The LCD shows the following screen.
For models with color LCD
(3) For models with color LCD: Each time you press the
key on the control panel), the LCD cycles through the displays as shown below.
For models with monochrome LCD: Each time you press the Black Start (Mono Start)
key, the LCD cycles through the displays as shown below.
For models with color LCD
[ ]
([Scan])
[ ]
([Scan])
[ ]
([Scan])
[ ]
([Scan])
[ ]
([Scan])
[ ]
([Scan])
[ ]
([Scan])
key (Scan key for models without
, and OK keys.
key on the control panel).
For models with monochrome LCD
key (Scan key for models without
For models with monochrome LCD
Black Start (Mono Start) key
Black Start (Mono Start) key
Black Start (Mono Start) key
9-16 Confidential