If the humidification roller of Relay Unit RU-511 is dirty, follow the steps below to clean it.
Open the relay unit front door of Relay Unit RU-511.
Hold the handle [HM1], and pull the Humidifier HM-101 out.
Hold the lever [HM2], and open the paper feed route.
Moisten the cleaning pad with isopropyl alcohol, then clean the humidification roller.
Hold the handle [HM1], and return the humidification kit HM-101 to its original position.
Close the relay unit front door of Relay Unit RU-511.