Operational Check Of Lcd (Function Code 12) - Brother HL-3040CN Service Manual

1.4.4

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
the maintenance mode. Then, press the OK button.
(2) Each time you press the Go button, the LCD cycles through the displays as shown below.
(3) Press Cancel button in any process of the display cycle. The machine 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
or button to display "MAINTENANCE 12" on the LCD in the initial state of
: OFF
: Display of all dots
: Green blinking
: Red blinking
: OFF
: Display of 16 frames
per line
: Green blinking
: Red blinking
: OFF
: Display of no dots
: Green blinking
: Red blinking
: ON (HL-3070CW only)
: Display of no dots
: Green blinking
: Red blinking
Display 1
Display 2
Display 3
Display 4
7-8
Fig. 7-3
Confidential