Chapter 77-12F-7-20E190-0000When the machine identifies the waste toner full sensor as being continuous-ly on for 2000 sheets, it will indicate a warning; if it then detects the activa-tion of the sensor for 100 sheets continuously, it will indicate 'E190-000'.(The count is increased coinciding with delivery.)7.12 Parts Replacement Procedure7.12.1 Pre-Exposure Lamp7.12.1.1 Removing the Front Cover Unit 0007-8024iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N // iR4570N / iR2230 / / / iR3530 /1) Open the front cover [1].F-7-212) Remove the face cover rubber [1].3) Remove the binding screw [2].4) Remove the RS tightening screw [3].5) Detach the front cover unit [4] by moving it in the direction of the arrow.F-7-227.12.1.2 Removing the Waste Toner Case 0007-8031iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N // iR4570N / iR2230 / / / iR3530 /1) Remove the waste toner case [1].F-7-23Point to note after attaching the waste toner receptacleAfter attaching the waste toner receptacle, move the waste toner full detec-tion lever [1] up and down to make sure that the lever is moved smoothly.Faulty detection may be resulted if the lever is caught in something and is notmoved smoothly.F-7-247.12.1.3 Removing the Toner Cartridge 0007-8342iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N // iR4570N / iR2230 / / / iR3530 /1) Shift up the lever [1].F-7-252) Remove the toner cartridge [1].