Operational Check Of Control Panel Pcb (Function Code 13) - Brother MFC990CW Service Manual

9.1.4.7 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. For models
without numerical keypad, enter 1 and 3 in this order using the
The "00 " will appear on the LCD.
(2) Press the keys in the order designated in the illustration shown below.
The LCD shows the corresponding number in decimal notation each time a key is pressed.
Check that the displayed number is correct by referring to the illustration below.
If a key is pressed out of order, the machine beeps (MFC only) and displays the "INVALID
OPERATE" on the LCD. To return to the status ready to accept key entry for operational
check, press the Stop/Exit key.
(3) After the last number key is pressed, the machine beeps (MFC only) and returns to the
initial stage of the maintenance mode.
To terminate this operation, press the Stop/Exit key. The machine returns to the initial
stage of the maintenance mode.
MFC990CW/790CW
MFC490CW
Key Entry Order
9-18
, and OK keys.
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