94 OKIOFFICE 87 User’s GuideReplacing the Toner Cartridge (OKI P/N 52111701)The number of pages you can print with one toner cartridge varies de-pending on the type of documents you usually receive or copy. A tonercartridge will print about 1,875 pages/A4 size of standard businesscommunications at a typical print coverage of 4% (equivalent of ITU-TNo. 1 test chart). The first toner cartridge installed in a new image drumunit will have a decreased yield because the image drum unit itself has tobe filled.If your MFP machine displays REPLACE TONER CART., replace thetoner cartridge with a new one. However, if the print density is highenough, you can continue to use the toner cartridge without replacing ituntil the print density becomes too low. If the print density becomes loweven before your MFP machine displays REPLACE TONER CART.,gently wipe the lens surface of the LED array (see Step 6).If the print density does not improve, replace the toner cartridge. Whenyour MFP machine’s display shows CHANGE DRUM, replace the imagedrum unit.Warning: Be careful when handling the toner cartridge. Do not lettoner spill on your clothing or other porous materials.See the Safety section at the beginning of this manual.CAUTION: If you open the top cover, you will see a label that reads:(CAUTION-HOT).This portion is extremely hot and must not betouched under any circumstances.1 Lift the MFP machine’s top cover into an upright position.
