5-2
Confidential
1.1.2 Method of entering end-user accessible maintenance mode
The maintenance mode functions should only be accessed by service personnel. However, 
end users are allowed to use some of these functions under the guidance of service 
personnel over the phone. End users can only use the functions shaded in the table “1.2 List 
of Maintenance Mode Functions” (Function code 09, 12, 25, 45, 77, 80, 82, 91).
<Operating Procedure>
LCD models
(1) Press the [OK], [Go], and [OK] in this 
order while the machine is in the 
ready state. “0” is displayed on the 
LCD.
(2) Press the [▲] or [▼] several times 
until the desired maintenance mode 
function is displayed on the LCD. 
Check that the desired maintenance 
mode is displayed on the LCD, and 
press the [OK].
(3) Each time the selected maintenance 
mode function is completed, the 
machine returns to the ready state 
automatically. For function codes 12, 
25, 45, 80, and 82, pressing and 
holding the [Go] returns the machine 
to the ready state.
LED models
(1) Check that the front cover is closed.
(2) Press and hold the [Go], and turn ON 
the power switch. The Toner, Drum, 
and Paper LEDs light.
(3) Release the [Go]. All LEDs go out.
(4) Press the [Go] for the assigned 
number of times to enter maintenance 
mode (While you are pressing the 
[Go], the Ready LED remains lit).
(5) Each time the selected maintenance 
mode function is completed, the 
machine returns to the ready state 
automatically.