Brother MFC640CW Service Manual page 176

(4) Move the head/carriage unit to the head replacement position (with Function code 63) using the
following key operation.
MFC820CW/640CW
Press the 6, 3, and * keys in this order.
DCP340CW
Enter 6, 3, and * by using the
(*To enter a numerical code on models having no numerical keypad, press the
display the numerical code to be entered and then press the Set key. Repeat this operation for each
numerical code.)
For details, refer to
Initial Setup Mode."
(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 pattern +1 is the least uneven print, for example, turn the head skew adjuster knob to the
front by one division; if pattern -1, turn the lever to the rear by one division.
and Set keys.*
Chapter 8, Section 8.4.13 "Travel Check of the Head/Carriage Unit and
6 - 1 1
Head skew adjuster knob
key several times to
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