Brother MFC-J3520 Service Manual page 273

(3) Press the *, 2, 8, 6 and 4 keys on the LCD in this order.
The machine displays the following screen on the LCD and enters the
maintenance mode.
(4) To select one of the maintenance mode functions listed on the
corresponding 2-digit code using the numerical keys.
Note: - Pressing the 9 key twice in the initial stage of the maintenance mode switches
the machine to standby.
- Pressing the Stop key after entering only one digit returns the machine to the
initial stage of the maintenance mode.
- If an invalid maintenance code is entered, the machine returns to the initial
stage of the maintenance mode.
5-2
5-4 page, enter the
Confidential