- The PCDU's protruding part (at the right of the shutter) fails to lift the shutter and the shutter stays closed, failing to supply toner to the PCDU, resulting in SC detection.
- The toner cartridge gear [A] and the middle cover gear [B] are not connected, failing to supply toner to the PCDU, resulting in SC detection.
Toner has clogged in the toner supply port of the toner cartridge.
- Open the toner cartridge's outer and inner shutters and check the toner supply port. If the toner is clogged, it will not come out even if you hold the cartridge with the supply port facing down and the shutter open.
- Open the toner cartridge's outer and inner shutters and check the toner supply port. If the toner is clogged, it will not come out even if you hold the cartridge with the supply port facing down and the shutter open.