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Confidential
1.4.22 Operational check of fans (Function code 78)
<Function>
This function is to check whether each of fans is operating correctly or not. The operation of
the following fan is checked respectively, and their operating states (rotation speed 100 %,
rotation speed 50 %, or OFF) are displayed.
<Operating procedure>
(1) Press the or button to display “MAINTENANCE 78” on the LCD in the initial state of
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.
Fig. 5-15
(3) Press Cancel button in any process of the display cycle. The printer returns to the initial
state of the maintenance mode.
Fig. 5-16
LCD Parts name Description
F Fuser fan Evacuate hot air of the fuser unit.
P Power fan Evacuate hot air of the low-voltage power supply PCB ASSY.
B Blower Intake air to prevent a dirt on the corona wire.
Fuser fan
Blower
Power fan
Intake
Exhaust
Exhaust
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