Brother MFC640CW Service Manual page 224

(6) MFC820CW/640CW
Press the 5 and 8 keys on the machine.
DCP340CW
Enter 5 and 8 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.)
The "1.PF 2.EXIT" appears on the LCD.
(7) MFC820CW/640CW
To select the paper feed roller adjustment, press the 1 key.
DCP340CW
To select the paper feed roller adjustment, enter 1 by using the
The "PF ADJ NO. +0" appears on the LCD.
(8) Check the PF adjust check patterns ("A" on
uneven print. Make a note of that pattern number.
If the unevenness is far to the left of check pattern -8, regard it as -8; if it is far to the right of
check pattern +8, regard it as +8. In this case, you need to check whether the paper feed roller
and head/carriage unit are set into place.
(9) Enter the number of the least uneven check pattern found in step (7).
MFC820CW/640CW
For example, if the number of the least uneven check pattern is +4, press the
press the and 4 keys. (To enter +, use the
DCP340CW
For example, if the number of the least uneven check pattern is +4, enter + and 4; if -4, enter -
and 4 by using the
(*To enter a plus/minus symbol or numerical code on models having no numerical keypad, press the
key several times to display the
key. Repeat this operation for each symbol or numerical code.)
The machine automatically returns to the initial stage of the maintenance mode.
(10) MFC820CW/640CW
Press the 5 and 8 keys on the machine.
DCP340CW
Enter 5 and 8 by using the
The "1.PF 2.EXIT" appears on the LCD.
(11) MFC820CW/640CW
To select the paper ejection roller adjustment, press the 2 key.
DCP340CW
To select the paper ejection roller adjustment, enter 2 by using the
and Set keys on the machine.*
and Set keys.*
/
or numerical code to be entered, respectively, and then press the Set
and Set keys on the machine.*
8 - 2 6
and Set keys.*
page 8-28) and select the one that is the least
key; to enter -, use the
key several times to
and 4 keys; if -4,
key.)
and Set keys.*
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