Brother MFC5890CN Service Manual page 332

(16) If the bottom margin is out of the specified range, press the 6 key twice and the # key on the
machine.
The "BOTTOM: 30" appears on the LCD.
(17) To adjust the bottom margin, enter the measured value (in units of 0.1 mm) multiplied by
10.
In this example, the bottom margin measured in step (15) is 3.1 mm, so press the 3, 1, and
OK keys.
Upon completion of the entry, the machine automatically returns to the initial stage of the
maintenance mode.
(18) Go back to step (14) and print out the bottom margin check pattern again.
(19) 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.
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