Operational Check Of Fans (Function Code 78) - Brother HL-4040CN Service Manual

1.4.16 Operational Check of Fans (Function code 78)

<Function>
This function is to check whether each of fans is operating correctly or not. The following fans
are checked.
LCD
FU
OPC
PS
AIR
<Operating Procedure>
(1) Press the
the maintenance mode. Then, press the OK button.
(2) Press the Go button to check the next term. For operation check, spin or stop fans actually
on each term.
(3) Press Cancel button in any process of the display cycle. The machine returns to the initial
stage of the maintenance mode.
Note:
If the air intake fan (AIR) error occurs, the following error message appears on the LCD.
If you press the Cancel button, the machine returns to the initial stage of the maintenance
mode without recovering from this error. To recover from this error, turn the power switch of the
machine off and then turn it on again.
Parts Name
Fuser unit fan
Drum unit fan
LVPS fan
Air intake fan
or button to display "MAINTENANCE 78" on the LCD in the initial stage of
Evacuate hot air of the fuser unit.
Evacuate hot air of the drum unit drive motor.
Evacuate hot air of the LVPS unit.
Intake air to prevent a dirt on the corona wire.
Fig. 5-9
Fig. 5-10
5-20
Description
Confidential