OKI 420dn Benutzerhandbuch

Consumables and maintenance > 61

This section deals with the replacement of the toner cartridge and image drum and general 

maintenance.

Please always use genuine consumables. 

How long your toner cartridge lasts depends on the print density; the percentage of the 

page that prints black. A typical letter has 3% to 5% print density; graphics usually have 

higher density. Higher print density means toner is used up faster. At 5% print density, a 

standard toner cartridge will print an average of 3500 pages. Remember, this is only an 

average:actual results may vary.
The first toner cartridge installed in a new printer has to fill the image drum reservoir and 

saturate the developing roller with toner. The toner cartridge that is supplied with this 

printer normally produces about 1,500

 

pages after installation.

When the toner is running low, TONER LOW is displayed in the operator panel LCD. After 

Toner Low displays, the printer will print about 100 more pages then display Toner Empty 

and stop printing. Printing will resume after a new toner cartridge has been installed.

It is recommended that you clean the LED array at the same time as you change the toner 

cartridge.
The toner used in this printer is a very fine dry powder contained in the toner cartridge.
Have a sheet of paper handy so that you have somewhere to place the used cartridge while 

you install the new one.
Dispose of the old cartridge responsibly, inside the pack that the new one came in. Follow 

any regulations, recommendations, etc., which may be in force concerning waste recycling.

Toner, 3.5K: B410d/B410dn/B420dn/B430dn

3500 Letter/A4 @ 5%
ISO/IEC19752

43979101 
 

Toner, 7K: B420dn, B430dn

7,000 Letter/A4 @ 5%
ISO/IEC19752

43979201 

Toner, 10K: B420dn

10,000 Letter/A4 @5%
ISO/IEC19752

43979206

Image drum

25,000 Letter/A4 pages

43979001