• Code: 910
• Description: Developing Motor Error (DM)
  This error indicates that the developing motor (DM) drive may have a problem.
• Remedy: 1 • Toner Cartridge • Developer Gear Unit • Developer Motor If any unusual rotation noise is heard while printing, check the toner cartridge and replace, if necessary. If the noise continues after the toner cartridge is replaced, check the developer gear unit by manually turning the motor. • If any damage to the gears is found, replace the developer gear drive unit. • If the noise continues, replace the developer drive motor (DM).
  2 Cable and Connectors If the developer motor does not turn On: • Ensure the connector DCN9 on the IOD1 P.W.B. board and the connector for the developer motor are completely connected. • Ensure connectors DCN1 on the IOD1 and 11CN on the main engine (MCTL P.W.B.) board are completely connected. • Replace any damaged parts.
  3 Developer Motor (DM) Check for +24V between DM1-4 and DM1-6 • DCN9-4 and DCN9-6 • DCN10-3 and DCN10-4 Check for +5V between DM1-5 and DM1-9 • DCN9-5 and DCN9-9 • DCN10-7 and DCN-9 If either +24V or +5V is found while checking these connectors, replace the developer motor (DM).
  4 • IOD2 P.W.B. Board • IOD1 P.W.B. Board • Main Engine (MCTL P.W.B.) Board If after replacing the developer motor the problem still exists, replace in the following order until the problem is resolved: • IOD2 P.W.B. board • IOD1 P.W.B. board • Main engine (MCTL P.W.B.) board

• Code: 911
• Description: Main Motor (MM) Error
  This error indicates a problem with the main motor.
• Remedy: 1 OPC Belt Print Cartridge Check the OPC belt cartridge for any rotation. If the main motor (MM) attempts to turn but the OPC belt cartridge does not, replace the OPC belt cartridge. Note: The OPC belt cartridge is a customer order supply.
  2 Fuser Unit Check the fuser for any rotation. If the main motor (MM) attempts to turn but the fuser does not, replace the fuser unit. Note: The fuser unit is a customer order supply.
  3 If an ‘82 PC Missing’ error is displayed, while diagnosing the main motor (MM), ensure the connector (CN1) on the main motor (MM) and connector ECN12 on the IOD2 P.W.B. board are firmly connected. Ensure the connectors ECN1, ECN2 on the IOD2 P.W.B. board, DCN10 on the IOD1 and 12CN on the main engine (MCTL P.W.B.) board are firmly connected. Replace any damaged part.

• Code: 915
• Description: Control Fan (CTFAN) Error
  This error indicates a problem with the control fan (CTFAN).
• Remedy: 1 Check Connector Ensure the control cooling fan motor is properly connected to DCN18 on the IOD1 P.W.B. board. Check that DCN1 or the IOD1 P.W.B. board and 11CN on the main engine (MCTL P.W.B.) board are connected.
  2 Control Cooling Fan Motor (CTFAN) Check the voltage between DCN18-1 and DCN18-2 on the IOD1 P.W.B. board. If the voltage drops to less than +24V, replace the control cooling fan (CTFAN).
  3 IOD1 P.W.B. Board Check the voltage between DCN1-33 and DCN1-44 on the IOD1 P.W.B. board. If the voltage drops to less than +24V, replace the IOD1 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Board If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 916
• Description: Ozone Fan (OZFAN) Error
  This error indicates a problem with the ozone fan (OZFAN).
• Remedy: 1 Check Connector Ensure the ozone fan motor connector is properly connected to ECN5 on the IOD2 P.W.B. board. Ensure connectors ECN1 on the IOD2 P.W.B. board and 12CN on the main engine (MCTL P.W.B.) board are properly connected.
  2 Ozone Fan Motor (OZFAN) IOD2 P.W.B. Board Check the voltage between ECN3-1 and ECN3-2 on the IOD2 P.W.B. board. If the voltage is +24V, replace the ozone fan (OZFAN). Check the voltage tween ECN1-9 and ECN2-8 on the IOD2 P.W.B. board. If the voltage is less than +24V, replace the IOD2 P.W.B. board.
  3 Main Engine (MCTL P.W.B.) Board If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 917
• Description: Fuser Heater Fan (HTFAN) Error
  This error indicates a problem with the fuser heater fan (HTFAN).
• Remedy: 1 Check Connector Ensure the fuser heater fan motor connector is properly connected to DCN14 on the IOD1 P.W.B. board. Ensure DCN1 on the IOD1 P.W.B. board and 11CN on the main engine (MCTL P.W.B.) board are connected properly.
  2 Fuser Heater Fan (HTFAN) Check the voltage between DCN14-10 and DCN14-11. If the voltage is +24V, replace the fuser heater fan (HTFAN).
  3 IOD1 P.W.B. Board Check the voltage between DCN1-35 and DCN1-44. If the voltage is +24V, replace the IOD1 P.W.B. board.
  4 Main Engine (MCTL P.W.B.) Board If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 918
• Description: Erase LED Error
  This error indicates a problem with the erase lamp.
• Remedy: 1 Check Connector Ensure the erase lamp connector is properly connected to DCN7 on the IOD1 board. Ensure DCN1 on the IOD1 board and 11CN on the main engine (MCTL P.W.B.) board are connected.
  2 Erase Lamp (LED P.W.B.) Check for voltage between DCN7-11 and DCN2-25 on the IOD1 board. • If the voltage drops to less than +24V, replace the erase lamp (LED P.W.B.).
  3 • IOD1 P.W.B. Board • Main Engine (MCTL P.W.B.) Board Check for voltage between DCN1-27 and DCN1-44 on the IOD2 P.W.B. board. • If the voltage jumps to +24V, replace the IOD1 P.W.B. board. If the problem still exists, replace the main engine (MCTL P.W.B.) board.

• Code: 920
• Description: Fuser Temperature Error
  These errors indicate a fuser temperature error.
• Remedy: 1 Fuser Unit Check for dirt or any damage to the fuser unit and replace, if necessary. Turn the machine on and determine whether the fuser heater is On. If the heater lamp is On, check for the correct input line voltage. If the line voltage is correct and the error still exists, replace the fuser unit. Note: The fuser unit is a customer order supply.
  2 • Fuser Low Voltage Power Supply (LVPS) • Main Engine (MCTL P.W.B.) Board Turn the machine On and determine whether the fuser is On. If the heater lamp is Off, check the following: • Ensure the fuser is installed properly. • Ensure the fuser connector is not damaged and replace, if necessary. If the problem still exists, replace the following parts in the order given until the error is cleared. • Fuser unit Note: The fuser unit is a customer order supply. • Low voltage power supply (LVPS) • Main engine (MCTL P.W.B.) board

• Code: 921
• Description: Fuser Themistor Error
• Remedy: 1 Fuser Unit Ensure the fuser is properly installed. If the fuser is damaged, replace the fuser unit. Note: The fuser unit is a customer order supply.
  2 Fuser Connector Check the fuser connector for damage and replace, if necessary.
  3 • Fuser Unit • IOD1 P.W.B. Board • Main Engine (MCTL P.W.B.) Board Ensure the fuser connector, FUCN, to the main engine (MCTL P.W.B.) board is properly connected. If the problem still exists, replace the following parts in the order given until the error is cleared. • Fuser unit • IOD1 P.W.B. board • Main engine (MCTL P.W.B.) board