Brother DCPJ525W Service Manual page 330

(2) If the bottom margin is out of the specified range, press the 6 key twice.
The "Select 66?" appears on the LCD.
(3) Press the Black Start (Mono Start) key.
The "MEDIA SENSOR ADJ" appears on the LCD.
(4) Press the # key to display "BOTTOM :30."
(5) To adjust the bottom margin, enter the measured bottom value (in units of 0.1 mm)
multiplied by 10.
In this example, the bottom margin measured in step (1) is 3.2 mm, so press the 3, 2, and
OK keys.
The machine returns to the initial stage of the maintenance mode.
(6) Go back to step (1) of the top/left/right margin adjustment procedure and print out the
"MEDIA CHECK" pattern again.
(7) Measure the bottom margin on the printed pattern.
If it is within the range from 2.9 to 3.1 mm, the adjustment is completed.
Note: To reset the correction values newly entered in the above procedure, press the 6, 6, Black
Start (Mono Start), 8, 9, 5 and 4 keys in this order in the initial stage of the maintenance mode.
The machine shows "PARAMETER INIT" on the LCD and returns to the initial stage of the
maintenance mode.
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