Chapter 44-26) Press [menu] on the control panel, and make the following selections: 10. maintenance>3. roller cleaning>2. start cleaning. Then, press [OK] to start cleaning.F-4-4- Take care. Once the machine starts cleaning, you will not be able to stop it in the middle.- It take about 3 min to clean the fixing assembly (i.e., from when you have placed the cleaning paper in the manual feed tray to when the paper is delivered). Donot turn off the power or open the cover during this period of time.4.1.7 Density Sensor/ITB Home Position Sensor 0008-1738When replacing the drum cartridge or contamination is found in the printer, clean the detection windows of the density detection sensor, as well as of the ITB homeposition detection sensor.F-4-5T-4-1The printer may indicate an image defect when density detection sensor or the ITB home position detection sensor is not clean. In these cases, clean the detectionwindows according to the procedures shown above.4.2 Periodically Replaced Parts4.2.1 Periodic Replacement Parts 0003-0867- No parts require periodic replacement in this printer.4.3 Consumables4.3.1 Expected Service Life of Consumable Parts 0011-6423- Some parts of the machine are likely to require replacement once or more because of wear or damage. Replace them when they are found to be faulty by referringto the following table:Timing of Replacing the Fixing AssemblyWhen the fixing assembly starts to approach the end of its life, you are likely to see ghost images in non-image areas of printouts or may notice general loweringof print quality (e.g., because of poor fixing). Paper may also start to wrinkle. You may need to replace the fixing assembly when these symptoms start to occur.T-4-2[1] Density sensor[2] ITB home position sensorNo. Parts name Parts No. Q'ty Estimated life1 Fixing assembly(230V) RG5-7442-000 1 50,000 prints[1][2]