Brother DCP-L2520D - Acquire White Level Data and Set CIS Scan Area (Function Code: 55)

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1.3.17 Acquire white level data and set CIS scan area (function code: 55)
<Function>
This function is used to acquire the white level of the CIS unit, and store this data and the
scan area in the EEPROM of the main PCB.
<Operating Procedure>
For models without keypad
(1) Press the [▲] or [▼] key in the initial
state of maintenance mode to display
"MAINTENANCE 55" on the LCD, and
press the [OK] key. "Press START" is
displayed on the LCD.
(2) Press the [Start] key. "SCANNER AREA
SET" is displayed on the LCD, and the
white level data is obtained.
(3) After several seconds, the compensation
value for the white level data/scanning
width is stored in the EEPROM, and the
machine returns to the initial state of
maintenance mode. If any error is
detected during this operation,
"SCANNER ERROR" is displayed on
the LCD for single-side scanning
models, and "SCANNER ERR ADF" or
"SCANNER ERR FB" is displayed for
duplex scanning models. Pressing the
[Stop] key in this occasion returns the
machine to the initial state of
maintenance mode.
For models with keypad
(1) Press the [5] key twice in the initial state
of maintenance mode. "Press START" is
displayed on the LCD.
(2) Press the [Start] or [Mono Start] key.
"SCANNER AREA SET" is displayed on
the LCD, and the white level data is
obtained.
(3) After several seconds, the compensation
value for the white level data/scanning
width is stored in the EEPROM, and the
machine returns to the initial state of
maintenance mode. If any error is
detected during this operation,
"SCANNER ERROR" is displayed on
the LCD for single-side scanning
models, and "SCANNER ERR ADF" or
"SCANNER ERR FB" is displayed for
duplex scanning models. Pressing the
[X] or [Stop] key in this occasion returns
the machine to the initial state of
maintenance mode.