If you want to chek the remaining percentage life of the toner cartridge on Sharp AR-5516, 5518, 5520 6020 or 6023 models:
– Press and hold down the light key about 5-6 sec. until the display starts flashing.
– Hold down the percentage key (%) and on the display you will see the remaining percentages (for example 100, 75, 50 or LO for low tonner).
– To exit, press the light key.