Oki B 4250 - Manual (Page 72)

CONSUMABLES AND MAINTENANCE > 72
3. Press the Menu button repeatedly until MAINTENANCE MENU
is displayed, then press the Select button.
4. Press the Item button until CLEANING PAGE is displayed.
5. Press the Select button.
6. The printer grips the paper and prints a cleaning page.
7. Return the printer on line by pressing the Online button.
8. If subsequent printing appears faded or uneven, try replacing the
toner cartridge.
CLEANING THE LED ARRAY
Clean the LED array whenever a new toner cartridge is installed or if there
are faded vertical areas or light printing down a page.
Wipe the LED array gently with the cleaning pad that came with the new
toner cartridge or use an anti-static cleaning pad that is generally available
for computer cleaning.