• Code: 153
• Description: Black Image Drum Fuse Cut Error
• Remedy:

• Code: 163
• Description: Black Toner Sensor Error
• Remedy:

• Code: 170
• Description: Upper Thermistor Circuit Shortened
• Remedy: IIs the thermistor connector inserted into the THERM connector of the main board normally? • No Insert the Thermistor connector correctly. • Yes Is the heater connector normally inserted in the CN201 connector of the low-voltage power. • No Insert the heater connector appropriately. • Yes Is the heater ON when turning on the power? • No Replace the fuser unit Assy, low-voltage power or main board. • Yes Replace the fuser unti Assy or the main board.

• Code: 171
• Description: Upper Thermistor Circuit Opened
• Remedy: IIs the thermistor connector inserted into the THERM connector of the main board normally? • No Insert the Thermistor connector correctly. • Yes Is the heater connector normally inserted in the CN201 connector of the low-voltage power. • No Insert the heater connector appropriately. • Yes Is the heater ON when turning on the power? • No Replace the fuser unit Assy, low-voltage power or main board. • Yes Replace the fuser unti Assy or the main board.

• Code: 172
• Description: Upper Heater High Temperature
• Remedy: IIs the thermistor connector inserted into the THERM connector of the main board normally? • No Insert the Thermistor connector correctly. • Yes Is the heater connector normally inserted in the CN201 connector of the low-voltage power. • No Insert the heater connector appropriately. • Yes Is the heater ON when turning on the power? • No Replace the fuser unit Assy, low-voltage power or main board. • Yes Replace the fuser unti Assy or the main board.

• Code: 173
• Description: Upper Heater Low Temperature Fuser unit humidity error. Turn off the power and wait a moment. And then, turn on the power.
• Remedy: IIs the thermistor connector inserted into the THERM connector of the main board normally? • No Insert the Thermistor connector correctly. • Yes Is the heater connector normally inserted in the CN201 connector of the low-voltage power. • No Insert the heater connector appropriately. • Yes Is the heater ON when turning on the power? • No Replace the fuser unit Assy, low-voltage power or main board. • Yes Replace the fuser unti Assy or the main board.

• Code: 182
• Description: Tray2 Unit I/F Error Reinstall the second tray unit of the options.
• Remedy: Is the Second Tray unit used? • Yes Is the printer main body appropriately set on the Second Tray unit? • No Set the printer main body appropriately. • Yes Replace the main board. • Has the trouble been solved? • No Check the trouble according to the maintenance manual of the Second Tray unit of the appendix C. • Yes Completed. • No Replace the main board.

• Code: 190
• Description: System Memory Overflow
• Remedy: