Samsung ML-4551ND - Manual (Page 46)

8.7
<Maintenance>
Clearing the Toner Low Replace Toner message
When the Toner Low Replace Toner message appears you can
configure not to see this message again not to disturb you.
1 Press Menu until System Setup appears on the bottom line of the
display and press OK.
2 Press the Scroll buttons until Maintenance appears and press OK.
3 Press the Scroll buttons until CLR Empty Msg. appears and press
OK.
4 Select On and press OK.
5 Now the Toner Low Replace Toner message does not appear but
the Replace Toner message will remain for reminding you that the
new cartridge needs to be installed for quality.
Caution
•Once you have selected On, this setting will be permanently
written to the memory of the toner cartridge, and this menu will
be disappeared from the Maintenance menu.
Maintenance parts
To avoid print quality and paper feed problems resulting from worn parts
and to maintain your printer in top working condition, the following items
will need to be replaced when the specified number of pages have been
printed or when the life span of each item has expired.
Samsung highly recommends that an authorized service provider, dealer
or the retailer where you bought printer performs this maintenance
activity.
Items Yield (Average)
Transfer roller 150,000
Fuser unit 150,000
Paper feeding roller 150,000
Rubber pad 150,000