cartridge (the control panel side of the printer) points straight down. 9 10 Slide the toner cartridge down into the slot until the cartridge stops. 11 Rotate the toner cartridge toward the back of the printer (within the cartridge slot) until the cartridge stops. The cartridge shutter opens to reveal the developer sleeve. 10 11 C7085-90921 Chapter 3 Installation and configuration 53 8 8 Make sure that the tab on the other end of the toner cartridge aligns with the notch on the cartridge slot. Note If the tab does not fit in the notch when you insert the toner cartridge, the toner is the wrong color for that cartridge slot.