Brother MFC9420CN

• Code: 26
• Description: Main motor error.
• Causes: Main motor defective Engine controller board defective
• Remedy: Main motor defective Replace the main motor Engine controller board defective Replace the engine controller board.

• Code: 27
• Description: Scanner motor error
• Causes: Connector LCN does not properly connected Laser unit defective Engine controller board defective
• Remedy: Connector LCN does not properly connected Connect the connector properly. Laser unit defective Replace the laser unit Engine controller board defective Replace the engine controller board.

• Code: 28
• Description: Charge HV unit error
• Causes: HV Power Supply defective
• Remedy: Replace the HV Power Supply PCB

• Code: 29
• Description: LVPS error.
• Causes: LV Power Supply defective
• Remedy: Replace the LV Power Supply PCB

• Code: 2A
• Description: Fuser thermistor error
• Causes: Fuser thermistor defective Engine controller board defective
• Remedy: Fuser thermistor defective Replace the fuser unit Engine controller board defective Replace the engine controller board.

• Code: 2B
• Description: Fuser heater error.
• Causes: Breakdown of Heater On/Off Circuit Breakdown of Temp Control Circuit
• Remedy: Breakdown of Heater On/OBreakdown of Temp Control Circuit Replace the engine controller boardff Circuit Replace the LV Power Supply PCB