Operational Check Of Control Panel Pcb (Function Code 13); Operational Check Of Control Panel Pcb - Brother MFC4820C Service Manual

7.5.6 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 1 and 3 keys in this order in the initial stage of the maintenance mode.
The "00 " will appear on the LCD.
(2) Press the keys and buttons in the order designated in the illustration shown below.
The LCD shows the corresponding number in decimal notation each time a key or button is
pressed. Check that the displayed number is correct by referring to the illustration below.
If a key or button is pressed out of order, the equipment beeps and displays the "INVALID
OPERATE" on the LCD. To return to the status ready to accept key & button entry for
operational check, press the Stop/Exit key.
(3) After the last number key or button is pressed, the equipment beeps and returns to the initial
stage of the maintenance mode.
To terminate this operation, press the Stop/Exit key. The equipment returns to the initial stage
of the maintenance mode.
Key & Button Entry Order
7 -1 4