Brother MFC990CW Service Manual page 313

(4) Move the head/carriage unit to the center of its travel with function code 63 (see
Section 9.1.4.20) using the following key operation.
Models with numerical keypad: Press the 6, 3, and Black Start (Mono Start) keys in this
order to display "START 63?" on the LCD. Next, press the * key.
NOTE: In models with touch panel, to display the numeral, * and # keys, it is necessary to
switch the software keypad between the numerical and function keypads by pressing the
Scan and Copy keys simultaneously.
Models without numerical keypad: Enter 6 and 3 using the
press the Black Start (Mono Start) key to display "START 63?" on the LCD. Next, enter
* using the ,
(5) Turn the head skew adjuster knob by the number of divisions specified by the pattern
number you recorded in step (3), using a spanner.
If block +1 is the least uneven print, for example, turn the head skew adjuster knob
clockwise by one division; if block -1, turn it counterclockwise by one division.
Counterclockwise
(6) After completion of the adjustment, press the Stop/Exit key. The head/carriage unit returns
to the home position (head capping position).
and OK keys.
Clockwise
7-15
Head skew adjuster knob
(head_skew_adjuster_knob_BHM9)
Chapter 9,
, and OK keys and then
Confidential