Operational Check Of Control Panel Pcb (Function Code 13) - Brother HL-4040CN Service Manual

1.4.5 Operational Check of Control Panel PCB (Function code 13)

<Function>
This function allows you to check the control panel PCB for normal operation.
<Operating Procedure>
(1) Press the
the maintenance mode. Then, press the OK button.
The machine displays "00" on the LCD.
(2) Press the buttons in the order designated in the illustration shown below.
The LCD shows the corresponding number in decimal notation each time a button is
pressed. Check that the displayed number is correct by referring to the illustration below.
If a button is pressed out of order, the machine displays the "INVALID OPERATE" on the
LCD. To return to the status ready to accept button entry for operational check, press the
Cancel button.
(3) After the last number button is pressed, the machine beeps and returns to the initial stage
of the maintenance mode.
To terminate this operation, press the Cancel button. The machine returns to the initial
stage of the maintenance mode.
or button to display "MAINTENANCE 13" on the LCD in the initial stage of
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Fig. 5-4
5-8 Confidential