OKI C844dnwl

Entering self-diagnostic mode (level 1)

1. Enter the system maintenance menu.
2. Press the [MENU▲] button or [MENU▼] button several times until the message "ENGINE DIAG MODE" is selected. Then, press the [ENTER] button to display "DIAGNOSTIC MODE".
3. XXX.XX.XX of the message "DIAGNOSTIC MODE XX.XX.XX" that is displayed on the LCD display area indicates the PU firmware version number. The FACTORY WORKING MODE setup value is displayed in the right of the lower row. S-MODE of "SHIPPING" is displayed normally.
4. Press the [MENU▲] button or [MENU▼] button to advance to the desired step of each self-diagnostic menu. (The menu items rotate when either the [MENU▲] button or [MENU▼] button is pressed.)

Exiting self-diagnostic mode

1. Press the [BACK] button when "DIAGNOSTIC MODE" is displayed.

Menu items of the ordinary self-diagnostic mode are shown below.

No	Item	Self-diagnostic menu	Adjustment contents
1	Switch scan test	SWITCH SCAN	Checks input sensor and switch.
2	Motor clutch test	MOTOR&CLTCH TEST	Tests the operation of a motor or clutch.
3	Test print execution	TEST PRINT	Prints a test pattern stored in the PU.
4	Color registration adjustment test	REG ADJUST TEST	Judges the color registration adjustment mechanism as pass or fail.
5	Density correction test	DENS ADJ TEST	Judges the density adjustment mechanism as pass or fail.
6	Consumable item counter display	CONSUMABLE STATUS	Displays the usage of a consumable.
7	Consumable item accumulative counter display	PRINTER STATUS	Displays the life counter of a consumable.
8	Factory/Shipping mode selection	FACTORY MODE SET	Switches between Factory and Shipping modes
9	Engine parameter setting	SENSOR SETTING	Sets whether to enable or disable error detection performed by each sensor.
10	Display of LED head serial number	LED HEAD DATA	Displays the serial number of LED head data.
11	Fuser Unit information setting	FUSER	Must not be used.
12	Drum Manual Cleaning	DRUM CLEANING	Executes manual cleaning of a drum surface