• Code: E1-22
• Description: Polygon Motor Synchronization
• Causes: 1. Engine PCB connector is disconnected. 2. Engine PCB is defective. 3. Laser Unit is defective. 4. LVPS connectors is disconnected. 5. LVPS is defective. 6. SC PCB is defective.

• Code: E13
• Description: TONER IS RUNNING LOW or OUT OF TONER
• Causes: 1. Toner Cartridge is incorrectly installed. 2. Out of Toner. 3. Low Toner Sensor is disconnected. 4. Low Toner Sensor is defective. 5. Engine PCB connector is disconnected. 6. Engine PCB is defective.

• Code: E3-20
• Description: Main Motor Rotation
• Causes: 1. Drive Mechanism is defective. 2. Main Motor connector is disconnected. 3. Main Motor is defective. 4. Engine PCB connector is disconnected. 5. Engine PCB is defective. 6. LVPS is defective.

• Code: E4-01
• Description: Fuser Warm-up Temperature
• Causes: 1. Fuser Thermistor is dirty. 2. Thermistor position is incorrect. 3. Fuser temperature is low. 4. Thermistor is defective. 5. Fuser Lamp connector is disconnected. 6. Fuser Thermostat is defective. 7. Fuser Lamp is defective. 8. Engine PCB connector is disconnected. 9. Engine PCB is defective.

• Code: E4-10
• Description: Exhaust Fan Motor Rotation (Fuser Unit Side)
• Causes: 1. Exhaust Fan connector is disconnected. 2. Exhaust Fan is defective. 3. LVPS connector is disconnected. 4. LVPS is defective. 5. Engine PCB is defective.

• Code: E5-11
• Description: Printer Engine Communication Abnormal
• Causes: 1. SC/Engine PCB connector is disconnected. 2. SC/Engine PCB is defective.

• Code: E5-12
• Description: Main CPU/SDR Interface Error
• Causes: 1. SC/SDR PCB connector is disconnected. 2. SC/SDR PCB is defective.

• Code: E5-19
• Description: Scanner Line Synchronization
• Causes: 1. SC/SDR PCB connector is disconnected. 2. SC/SDR PCB is defective.