A2.4 Updating Correction Value For Multiplying Factor Of Horizontal Scanning - Brother MFC5200C Service Manual

A2.4 Updating Correction Value for Multiplying
Factor of Horizontal Scanning, Stored in the
Facsimile Machine
To keep the scanning quality in reduction/enlargement copying, the controller compensates the
multiplying factor of horizontal scanning according to the correction value stored in the EEPROM
of the driver PCB.
If you replace the CCD unit, scanner unit, or driver PCB of the machine, then you need to update
the correction value for the multiplying factor of horizontal scanning according to the procedure
given below.
TIP: The updating procedure given here needs entry to the maintenance mode. Refer to
CHAPTER 7, Subsection 7.5.11.
(1) After completion of replacement of the CCD unit, scanner unit, or driver PCB, plug the
machine's power cord into a wall socket and then turn on the facsimile machine.
The LCD shows the number of pixels.
(2) According to the number of pixels displayed, obtain the new correction value from the
correction table given on the next page.
(3) Make the machine enter the maintenance mode (refer to CHAPTER 7, Section 7.2) and then
press the 5 key twice (Subsection 7.5.11).
The machine checks and sets the area to be scanner. After that, it becomes ready to accept a
new correction value.
(4) Enter the new correction value obtained in step (2) above.
Press the Stop key to return to the initial stage of the maintenance mode, then press the 9 key
twice to exit from the maintenance mode.
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