Stapler Align Error
Remove the paper from the stapler and re-send the job.
Clear the stapler jam and re-send the job.
Stapler Supply Out
Load a new staple cartridge.
The toner is uneven in the cartridge.
The toner cartridge contact points are malfunctioning.
The high-voltage power supply (HVPS) is defective.
Tray x Empty/x Load/Paper Out
The paper tray is empty or is seated incorrectly.
The sensor arm is stuck or broken.
The tray-size sensor is defective or configured incorrectly.
– Verify the tray tabs and switches at the right rear (or right front) of
the tray slot, or configure the tray from the control panel.
– The paper control/sensor PCA is defective.
Error Codes – 21