How to clean Laser Unit of Canon iR2420, iR2016 | error code E100 solution

Canon iR 2318, ir 2420, ir 2016, ir 2018, ir2020, ir 2022 Laser Unit Cleaning Guide...
The laser glass slits can get dirty and affect copy quality over time on any copier (usually causes fading of copier). On Canon iR 2318, ir 2420, ir 2016, ir 2018, ir2020, ir 2022 it is easy to clean the glass slits.

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