Brother DCP-J552DW Service Manual page 277

Resetting set values
(1) Press the [6] and [5] keys in this order in the initial stage of the maintenance mode. The
machine displays "MAINTENACE 65" on the LCD.
(2) Press the [8], [6], [5], and [4] keys in this order. "INIT ADJ_L_LINE?" appears on the LCD.
(3) Press the [Set] key. Reset the adjustment of ruled lies, and return to the initial stage of the
maintenance mode.
(4) When the power is turned OFF, the reset values are written to the EEPROM.
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