Code :

Code: 56
Description: Back cover opened
Causes: 1 Back cover switch failure. 2 Harness connection failure of back cover switch ASSY. 3 Part pressing the back cover switch is broken, which is provided at the right side of back cover on the inside. 4 Engine PCB failure.
Remedy: 1 Back cover switch failure Check the sensor performance following the procedure described in “Maintenance mode 32”. 2 Harness connection failure of back cover switch ASSY Check the harness connection of the back cover switch ASSY and reconnect it. 3 Part pressing the back cover switch is broken, which is provided at the right side of back cover on the inside. Replace the back cover switch ASSY. 4 Engine PCB failure Replace the engine PCB ASSY.

Code: 57
Description: Paper jam while turning it over in duplex printing or DX solenoid failure
Causes:
Remedy:

Code: 58
Description: Fuser unit failure
Causes: 1 Harness connection failure between fuser unit connector and engine PCB. 2 Fuser unit failure. 3 Low-voltage power supply PCB failure. 4 Engine PCB failure.
Remedy: 1 Harness connection failure between fuser unit connector and engine PCB Check the harness connection between the fuser unit connector and engine PCB, and reconnect it. 2 Fuser unit failure Replace the fuser unit. 3 Low-voltage power supply PCB failure Replace the PS PCB unit. 4 Engine PCB failure Replace the engine PCB ASSY.

Code: 59
Description: Fuser unit failure
Causes: 1 Harness connection failure between fuser unit connector and engine PCB. 2 Fuser unit failure. 3 Low-voltage power supply PCB failure. 4 Engine PCB failure.
Remedy: 1 Harness connection failure between fuser unit connector and engine PCB Check the harness connection between the fuser unit connector and engine PCB, and reconnect it. 2 Fuser unit failure Replace the fuser unit. 3 Low-voltage power supply PCB failure Replace the PS PCB unit. 4 Engine PCB failure Replace the engine PCB ASSY.

Code: 5A
Description: Charge HVPS PCB ASSY failure
Causes: 1 Charge HVPS PCB ASSY harness connection failure. 2 Charge HVPS PCB failure. 3 Engine PCB failure.
Remedy: 1 Charge HVPS PCB ASSY harness connection failure Check the harness connection between the charge HVPS PCB and engine PCB, and the one between the charge HVPS PCB and low-voltage power supply PCB. Then, reconnect them. 2 Charge HVPS PCB failure Replace the charge HVPS PCB ASSY. 3 Engine PCB failure Replace the engine PCB ASSY.