• Code: E0
• Description: Communication error
  Communication between the engine controller and the main controller is failed.
• Causes: • Controller gate array defect • Connector failure between the engine and the main controller • Overrun in the engine system, deactivating the progam flash ROM

• Code: E1
• Description: Main motor error
  The main motor is overtorqued.
• Causes: • Overcurrent in the main motor circuitry due to an axcessive torque • Loose connector • Defective gate array on the engine board • No response from the main motor due to the defective motor driver (transistor)

• Code: E2
• Description: Laser scanner motor error
  The polygon motor does not deliver a synchronous output (L) within the predetermined period of time.
• Causes: • Timeout in the predetermined period of lead time which the scanner motor speed has to be reached at start up (SCRDY*) • Connector insertion error • Defective gate array on the engine board • Time out dur to the defective scanner motor driver (transistor)

• Code: E3
• Description: Laser beam detection error
  Beam detection is failed. The photo detector board does not deliver a synchronous output (L).
• Causes: • No beam hit due to the laser diode defect (PD*) • Improper connector insertion • Soiled/defective beam detector (pinphoto diode) sensor • Defective safety lock • Unoperative gate array input port

• Code: E4
• Description: Fuser heater error
  The fuser heater is not intact due to disconnection or the circuit failure.
• Causes: • Blown-out thermistor • Improper connector insertion • Blown-out halogen heater • Blown-out thermostat • Comparator defect on the engine board • Defective engine CPU (input port) • Defective gate array (input/output port operation)

• Code: E5
• Description: Eraser error
  The eraser is blown out or the power supply does not reach to the eraser
• Causes: • Blown-out LED chip(s) • Connector insertion error • Defective gate array (input/output port)

• Code: E6
• Description: Flash ROM error
  Checksum is erroneous with the flash ROM.
• Causes: • Data readout error on the flash ROM

• Code: E9
• Description: Toner motor error
  The toner motor is overtorqued
• Causes: • Overcurrent in the toner motor circuitry due to an axcessive torque • Loose connector • Defective gate array on the engine board • Defective toner motor overcurrent detector