Brother MFC9100C Service Manual page 181

3.12 Initial Adjustment of PWM Value (Aging of the Carriage)
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Function
This function obtains the initial value of the PWM by aging the carriage and writes it onto the
EEPROM, as well as checking the head drive voltage level.
This aging procedure should be performed if you replace the print head, carriage ASSY, carriage
motor, or encoder strip or if you loosen the CCD drive belt.
NOTE: Opening the scanner unit during the aging procedure will result in an error. If you perform
this aging procedure with the scanner unit opened, the equipment will slowly age the carriage
resulting in an error after completion of the aging.
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Operating Procedure
(1) Press the 6 and 9 keys in this order in the initial stage of the maintenance mode.
The equipment starts aging the carriage, showing the "CR AGING" on the LCD.
After writing the initial value of the PWM onto the EEPROM and checking the head drive
voltage level, the equipment automatically returns to the initial stage of the maintenance
mode.
If any error occurs, the equipment beeps and shows "CR AGING :ERROR" on the LCD. To
return to the initial stage of the maintenance mode, press the Stop key.
3.13 EEPROM Customizing
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Function
This function allows you to customize the EEPROM according to language, function settings, and
firmware switch settings. The customizing codes list is given in Appendix 1.
NOTE: If you replace the main PCB, be sure to carry out this procedure.
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Operating Procedure
(1) Press the 7 and 4 keys in this order in the initial stage of the maintenance mode.
The current customizing code (e.g., 1001 in the case of MFC9100C U.S.A. version) appears.
(2) Enter the desired customizing code (e.g., 0002 in the case of MFC9100C Canadian version).
The newly entered code appears.
NOTE: If a wrong 4-digit code is entered, the equipment will malfunction.
(3) Press the Start key.
The equipment saves the setting and returns to the initial stage of the maintenance mode.
If you press the Stop key or no keys are pressed for one minute in the above procedure, the
equipment stops the procedure and returns to the initial stage of the maintenance mode.
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