Operational Check Of Fans (Function Code) - Brother MFC-9130CW Service Manual

1.4.31 Operational check of fans (Function code 78)
<Function>
This function allows you to check that the main fan is operating normally.
The rotation speed is changed among three settings: 100 %, 50 % and OFF.
<Operating procedure>
(1) Press the 7 and 8 keys in this order in the initial state of the maintenance mode.
"F 100" is displayed on the LCD, and the main fan operates at the rotating speed of 100 %.
If the main fan is faulty, "NG" is displayed on the LCD.
(2) Press the Mono Start key.
"F 50" is displayed on the LCD, and the main fan operates at the rotating speed of 50 %.
(3) Press the Mono Start key. "F0" is displayed on the LCD, and the main fan stops.
(4) Press the Mono Start key. "F 100" is displayed on the LCD, and the machine returns to
the state described in step (1). Every time the Mono Start key is pressed, the displayed
rotating speed changes as described in steps (1) to (3).
(5) Press the Stop key to return the machine to the initial state of the maintenance mode.
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