Maintenance_ 493. With a dry, lint-free cloth, wipe away any dust and spilled toner from the toner cartridge area.While cleaning the inside of the machine, be careful not to damage the transfer roller or any other inside parts.Do not use solvents such as benzene or thinner to clean. Printing quality problems can occur and causedamage to the machine.4. Locate the long strip of glass (LSU) inside the machine and gently swab the glass to see if dirt turns the white cottonblack.5. Reinsert the toner cartridge and close the front door.6. Plug in the power cord and turn the machine on.Cleaning the scan unitKeeping the scan unit clean helps ensure the best possible copies. We suggest that you clean the scan unit at the start ofeach day and during the day, as needed1. Slightly dampen a soft lint-free cloth or paper towel with water.2. Open the control panel by gripping it on the bottom edge and pulling it upwards.3. Disassemble the white roller as follows