Acquisition Of White Level Data (Function Code 55) - Brother DCP-7057 Service Manual

1.4.17 Acquisition of white level data (Function code 55)

<Function>
This function allows you to acquire the white level of the scanner unit and save it to the
EEPROM of the main PCB.
Note:
• After deep sleep mode is released, execute this function code. If the correct white level
data is not yet acquired, update the firmware to the latest version. If updating the
firmware is not possible, open and close the front cover, and then retry acquisition after
the main motor has stopped.
<Operating Procedure>
(1) Press the 5 button twice in the initial state of the maintenance mode.
In the case of the model without the numeric keys; Press the
"MAINTENANCE 55" appears on the LCD. Then press the OK button.
(2) The "Press START" will appear on the LCD. Press the Start button.
The "SCANNER AREA SET" will appear on the LCD.
(3) After a few seconds, the machine saves the compensation of the white level data/
scanning width in the EEPROM, beeps for one second, and returns to the initial state of
the maintenance mode.
5-26
or button. The
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