Question about Office Equipment & Supplies
E20 is Development unit for Toner 1 (Black) error. That does not mean that the toner is empty, it means that a fault had been detected. Usually faulty toner sensor on development unit.
Try first removing black toner cartridge, then unplugging power cord, restarting the printer and refitting toner.
If that does not work, find a spare black cartridge and refit toner.
If you have cleaned the inside of a copier before you can also clean the black development unit, where the fault had been detected.
If still no luck, then a faulty toner sensor in development unit is causing the error. In that case you will need a technician to test parts and fix the copier.
Posted on Sep 23, 2009
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Posted on Jan 02, 2017
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