1. Remove the toner supply unit inner cover. (Toner Supply Unit Inner Cover)
  2. Remove the sub hopper unit [A].
    e.g.: Y

    • For the following models and colors, the toner fall prevention sheet is attached to the toner supply unit side.
      • Pro C5200S/C5210S: K, C
      • MP C6503/C8003: K
    • When installing the sub hopper unit [A], take care not to tuck the toner fall prevention sheet [B]. The following picture shows the normal state.
      e.g.:C