Operational Check Of Lcd (Function Code 12) - Brother MFC-9320CW Service Manual

1.4.7

Operational check of LCD (Function code 12)

<Function>
This function allows you to check whether the LCD on the control panel cover ASSY works
normally.
<Operating procedure>
(1) Press the 1 and 2 buttons in this order in the initial state of the maintenance mode.
The LCD shows.
(2) Each time you press the Start/Black button, the LCD cycles through the displays as
shown below.
(3) When the Stop/Exit button is pressed regardless of the display, the machine cancels the
operation, beeps for one second and returns to the initial state of the maintenance mode.
<Display 1>
Backlight
LCD
Data LED
Error LED
<Display 2>
Backlight
LCD
Data LED
Error LED
<Display 3>
Backlight
LCD
Data LED
Error LED
<Display 4>
Backlight
LCD
Data LED
Error LED
: OFF
: Display of all dots
: Green blinking
: Red blinking
: OFF
: Display of a frame with
2 lines and 16 dots
: Green blinking
: Red blinking
: OFF
: Display of no dots
: Green blinking
: Red blinking
: ON
: Display of no dots
: Green blinking
: Red blinking
7-13
Display 1
Display 2
Display 3
Display 4
Fig. 7-5
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