: If the toner cartridge is empty, or if toner is packed tight inside the transport path, the developer unit fails to reach required concentration thresholds.
: This reset procedure addresses the error's immediate cause, not the underlying hardware issue. If the printer hasn't been fully repaired (e.g., with a new drum or developer unit), the error will likely reappear after a short period of use.
Turn the printer back on. The printer may run a cleaning cycle, which might clear the error. 2. Clean the CTD/ADC Sensor Window
For models like the WorkCentre 5024, the error flag may be "locked" in the NVRAM and requires a manual reset even after the physical cause is fixed. Turn on the printer.
Give the cartridge a gentle shake from side to side to distribute packed toner evenly.
Plug the power cord back into a known working wall outlet (avoid surge protectors during troubleshooting). Turn the machine back on and check if the error persists. Step 2: Clean the LED Printheads and Sensors
