Causes: 1. Incorrect Hardware Key is installed. 2. Hardware Key is defective.
Code: U01
Description: CLOSE FRONT COVER
Causes: 1. Front Cover is open. 2. Front Cover Sensor is disconnected. 3. Front Cover Sensor is defective. 4. LVPS connector is disconnected. 5. LVPS is defective. 6. Engine PCB is defective.
Code: U13
Description: TONER IS RUNNING LOW or OUT OF TONER
Causes: 1. Toner Cartridge is incorrectly installed. 2. Low Toner. 3. Toner Sensor is disconnected. 4. Toner Sensor is defective. 5. Engine PCB connector is disconnected. 6. Engine PCB is defective.