5-1
Confidential
CHAPTER 5 SERVICE FUNCTIONS
1. MAINTENANCE MODE
Maintenance mode is exclusively designed for checking, setting and adjusting the machine
using the keys on the control panel. For LCD models, you can conduct operational checks of
sensors or test printing, display the log information or error codes, and change the worker
switches (WSW) by using maintenance mode functions. Although LED models are not
equipped with the above maintenance mode functions, they are equipped with conventional
maintenance mode functions using the [Go] key.
1.1 How to Enter Maintenance Mode
1.1.1 Method of entering maintenance mode for service personnel
<Operating Procedure>
LCD models
(1) Press the [OK] key and then the [Go]
key while the machine is in the ready
state. Then, press the [▲] key four
times to enter the maintenance mode.
LED models
(1) Open the front cover while the power
switch is turned OFF.
(2) Press and hold the [Go] key, and turn
ON the power switch. The Toner,
Drum, and Paper LEDs light.
(3) Release the [Go] key. All LEDs go out.
(4) Press the [Go] key for the assigned
number of times to enter maintenance
mode (While you are pressing the
[Go] key, the Ready LED remains lit).
Toner, Drum, and Paper LEDs light
when the [Go] key is pressed for
assigned number of times.
(5) Press the [Go] key again for the
assigned number of times to select
the function (While you are pressing
the [Go] key, the Ready LED remains
lit).
Toner, Drum, and Paper LEDs go out
in a second after the [Go] key is
pressed for assigned number of
times.
Note:
• To enter the maintenance mode,
press the [Go] key in two seconds
after pressing the [OK] key.
Similarly, press the [▲] key in two
seconds after pressing the [Go]
key.
(2) "■■ MAINTENANCE ■■■" is
displayed on the LCD to indicate that
the machine entered the initial state of
maintenance mode. The machine is
ready to accept entry via keys.
(3) To select any of the maintenance
mode functions shown in the “1.2 List
of Maintenance Mode Functions”,
press the [▲] or [▼] key. Check that
the desired maintenance mode is
displayed on the LCD, and press the
[OK] key.
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