Brother MFC Series Service Manual page 215

1) Check the block number with the least uneven printing within the configuration
block (bottom). Using a spanner, turn the external inclination adjuster knob
according to the checked number.
For example, when +2 block print unevenness is the smallest, turn the external
inclination adjuster knob two notch clockwise. If the smallest number is -2 block,
turn the external inclination adjuster knob two notch counter-clockwise.
2) After making adjustments, proceed to Step (8).
When the block number with the least uneven printing in the configuration block (top)
is not "0"
1) Check the block number with the least uneven printing within the configuration
block (top). Using an Allen wrench, turn the internal inclination adjuster knob
according to the checked number.
For example, when +1Right block print unevenness is the smallest, turn the
internal inclination adjuster knob 90 degrees clockwise. If the smallest number is
Left-1 block, turn the inclination adjuster knob 90 degrees counter-clockwise.
2) Close the document scanner unit and print the test pattern for inclination
adjustment again in the same manner as Step (6).
3) Perform Chapter 5 "1.4.19 Move of the Head/Carriage Unit to the Adjustment
Position (Maintenance mode 63)"
position. Open the document scanner unit.
4) Check the block number with the least uneven printing within the configuration
block (bottom). Using a spanner, turn the external inclination adjuster knob
according to the checked number.
For example, when +2 block print unevenness is the smallest, turn the external
inclination adjuster knob two notch clockwise. If the smallest number is -2 block,
turn the external inclination adjuster knob two notch counter-clockwise.
(8) Close the document scanner unit after adjustments.
The Head/carriage unit will return to its home position.
(9) Print the test pattern in step (6) again and confirm that the block number with the least
uneven printing in the top and bottom configuration block is "0".
When the block number with the least uneven printing is not "0", repeat the adjustment
from step (1).
Head/carriage unit
Head cover
Inclination adjuster
knob (external)
to move the Head/carriage unit to an adjusted
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