Printout Of Scanning Compensation Data (Function Code 05); Printout Of Scanning Compensation Data - Brother MFC4820C Service Manual

7.5.2 Printout of Scanning Compensation Data (Function code 05)

Function
The equipment prints out the white and black level data for scanning compensation.
Operating Procedure
Do not start this function merely after powering on the equipment but start it after carrying out a
sequence of scanning operation. Unless the equipment has carried out any scanning operation, this
function cannot print out correct scanning compensation data. This is because at the start of
scanning operation, the equipment initializes white and black level data and takes in the scanning
compensation reference data.
(1) Press the 0 and 5 keys in this order in the initial stage of the maintenance mode.
The "WHITE LEVEL 1" will appear on the LCD.
(2) The equipment prints out the scanning compensation data list containing the following:
a) Black/white data graph
b) LED PWM data for color image (1 byte)
c) LED PWM data for monochrome image (1 byte)
d) LED light intensity pulse data for green image (2 bytes)
e) LED light intensity pulse data for blue image (2 bytes)
f) LED light intensity pulse data for red image (2 bytes)
g) A/D converter reference level for high value, (1 byte)
h) A/D converter reference level for low value (1 byte)
i) Compensation data for background color (1 byte)
j) Black level data (4962 bytes)
k) White level data for red image (4962 bytes)
l) White level data for green image (4962 bytes)
m) White level data for blue image (4962 bytes)
(3) Upon completion of recording of the compensation data list, the equipment returns to the
initial stage of the maintenance mode.
NOTE: When the equipment prints monochrome images after monochrome scanning, only the
green data is valid.
NOTE: If any data is abnormal, its code will be printed in inline style.
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