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Confidential
1.3.16 Check fan operation (Function code 78)
<Function>
This function is used to check that the fan is operating normally. Switch the setting among
rotation speed 100%, 50%, and OFF.
<Operating Procedure>
(1) Press the [▲] or [▼] in the initial state of maintenance mode to display “MAINTENANCE
78” on the LCD, and press the [OK]. “F100” is displayed on the LCD and the fan rotates
at 100% speed.
(2) By pressing the [Go], “F50” is displayed on the LCD and the fan rotates at 50% speed.
(3) By pressing the [Go] again, “F 0” is displayed on the LCD and the fan stops.
Press and hold the [Go] for five seconds, and the machine returns to the initial state of
maintenance mode.
Location of fan
Fig. 5-10
LCD Name Description
F Fan Emits the heat in the fuser unit.
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