Brother FAX-545, Service Manual

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8-5 Confidential
„ Operating Procedure
(1) Press the 0 and 1 keys (or the 9 and 1 keys according to your need) in this order in the initial
stage of the maintenance mode.
The "PARAMETER INIT" will appear on the LCD.
(2) Upon completion of parameter initialization, the machine returns to the initial stage of the
maintenance mode.
8.4.2 Printout of Scanning Compensation Data (Function code 05)
„ Function
The machine prints out the white and black level data for scanning compensation.
„
Operating Procedure
Do not start this function merely after powering on the machine but start it after carrying out a
sequence of scanning operation. Unless the machine 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 machine 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 machine prints out the scanning compensation data list containing the following:
a) White level data (208 bytes)
b) Black level data (1 byte)
c) White level data for compensation operation of background color (100 bytes)
d) Initial clamp PWM value (1 byte)
e) Clamp PWM value (1 byte)
f) Compensation data for background color (1 byte)
g) Upper and lower limit data for the compensation factor of background color (4 bytes)
h) Initial LED light intensity value (1 byte)
i) LED light intensity value (1 byte)
j) LED light intensity value on the white film of the document pressure bar ASSY and
documents (2 bytes)
k) Document rear sensor adjustment value (1 byte)
(3) Upon completion of recording of the compensation data list, the machine returns to the initial
stage of the maintenance mode.
NOTE: If any data is abnormal, its code will be printed in inline style, as shown on the next page.