1. Remove the right cover. (Right Cover (Printer), Right Cover (MF))
  2. Printer model: Remove the upper cover. (Upper Cover (Printer))

  3. Remove the PCDU cooling fan (right) (FAN1) [A].
    Printer model:

    MF model:

    Fasten the cooling fan with its decal facing inside the machine.

    MF model: When you remove or install a fan, pass the fan connector [A] through the sponge hole on the side of the duct. The sponge hole slightly is smaller than the connector, so work carefully to avoid tearing the sponge.