• Code: E020
• Description: Counter Error
• Causes: The Counter Connection Detection Signal (COUNT_OPN) continues to be “L” for 1 second or longer after turning on.
• Remedy: Wires 1 Is the wire between Counter and PW10520 PWB connected properly? No Connect it properly. Confirm that the machine is turned on, and then check the voltage of the orange line (J220-5). Is it 24V? No Replace the DC Power Supply if there is no problem with the wires. DC Power Supply (DCP1) or Fuse 2 Confirm that the machine is turned off, and then check whether or not each Fuse is broken. Is any Fuse broken? Yes Replace the Fuse. Counter 3 Check the operation of Counter in the Device Operation Mode of the Service Mode. Signal Code : 26 (Counter) Does the Counter operate correctly? No Replace the Counter.

• Code: E031
• Description: Image Corona Output Error
• Causes: The Image Corona Output Detection Signal (IM_LD) continues to be “L” for 1 second or longer when the Image Corona is ON.
• Remedy: Wires 1 Are wires among Image Corona, HV Power Supply PWB and PW10520 PWB connected properly? No Connect them properly. Is the Image Corona dirty? Yes Clean each Corona Wire, Grid Plate and housing. Image Corona 2 Is the Corona Wire broken? Yes Replace the Corona Wire. Is the Transfer Corona dirty? Yes Clean each Corona Wire and housing. Transfer Corona 3 Is the Corona Wire broken? Yes Replace the Corona Wire. Is the Separation Corona dirty? Yes Clean each Corona Wire and housing. Separation Corona 4 Is the Corona Wire broken? Yes Replace the Corona Wire. HV Power Supply 5 Can you fix the problem if you replace the HV Power Supply? Yes OK

• Code: E032
• Description: Separation Corona Output Error
• Causes: The Separation Corona Output Detection Signal (AC_LD) continues to be “L” for 1 second or longer when the Separation Corona is ON.
• Remedy: Wires 1 Are wires among Image Corona, HV Power Supply PWB and PW10520 PWB connected properly? No Connect them properly. Is the Image Corona dirty? Yes Clean each Corona Wire, Grid Plate and housing. Image Corona 2 Is the Corona Wire broken? Yes Replace the Corona Wire. Is the Transfer Corona dirty? Yes Clean each Corona Wire and housing. Transfer Corona 3 Is the Corona Wire broken? Yes Replace the Corona Wire. Is the Separation Corona dirty? Yes Clean each Corona Wire and housing. Separation Corona 4 Is the Corona Wire broken? Yes Replace the Corona Wire. HV Power Supply 5 Can you fix the problem if you replace the HV Power Supply? Yes OK

• Code: E033
• Description: Transfer Corona Output Error
• Causes: The Transfer Corona Output Detection Signal (TR_LD) continues to be “L” for 1 second or longer when the Transfer Corona is ON.
• Remedy: Wires 1 Are wires among Image Corona, HV Power Supply PWB and PW10520 PWB connected properly? No Connect them properly. Is the Image Corona dirty? Yes Clean each Corona Wire, Grid Plate and housing. Image Corona 2 Is the Corona Wire broken? Yes Replace the Corona Wire. Is the Transfer Corona dirty? Yes Clean each Corona Wire and housing. Transfer Corona 3 Is the Corona Wire broken? Yes Replace the Corona Wire. Is the Separation Corona dirty? Yes Clean each Corona Wire and housing. Separation Corona 4 Is the Corona Wire broken? Yes Replace the Corona Wire. HV Power Supply 5 Can you fix the problem if you replace the HV Power Supply? Yes OK

• Code: E034
• Description: Developer Bias Output Error
• Causes: The Developer Bias Output Detection Signal (BIAS_LD) continues to be “L” for 1 second or longer when the Developer Bias is supplied to the Developer Unit.
• Remedy: Wires 1 Are wires among Developer Unit, HV Power Supply PWB and PW10520 PWB connected properly? No Connect them properly. Is the toner spill out from the Developer Unit? (Or is there any similar problem?) Yes Clean each Corona Wire, Grid Plate and housing. Developer Unit 2 Is the high voltage of Regulation Roller leaking? (The resistance between the central part of Regulation Roller and the Ground is 5 mega ohm or smaller if leaking.) Yes Replace the Regulation Roller. HV Power Supply 3 Can you fix the problem if you replace the HV Power Supply? Yes OK

• Code: E040
• Description: Cutter Error
• Causes: 1. The Cutter Home Sensor Signal (MSCUT_L or MSCUT_R) does not change to “H” within 100 millisecond since the Cutter has started the operation. 2. The Cutter Home Sensor Signal (MSCUT_L or MSCUT_R) does not change to “L” within 1 second since the Cutter has started the operation.
• Remedy: Wires 1 Is the wire between Cutter Unit and PW10520 PWB connected properly? No Connect it properly. Cutter Home Position Sensors (MS6 & MS7) 2 Check the status of the following signals in the Device Status Mode of the Service Mode. Signal Code : 078 (Cutter Home Position Right) 079 (Cutter Home Position Left) Is the status “L” when the Cutter is at each home position? No Replace the Cutter Unit. Developer Press Sensor (PH4) 3 Check the operation of Cutter in the Device Operation Mode of the Service Mode. Signal Code : 27 (Cutter Motor 1) 28 (Cutter Motor 2) Does the Cutter operate? No Replace the Cutter Unit.

• Code: E050
• Description: FPGA Error
• Causes: Initialization of FPGA is failed after turning on.
• Remedy: PW10520 PWB 1 Can you fix the problem if you replace the PW10520 PWB? Yes OK

• Code: E070
• Description: Developer Error
• Causes: 1. The Connector J-253 is not connected. 2. The Switch (MS4) is “open” condition, which detects open/close of Engine Unit or Toner Hatch.
• Remedy: Wires 1 Is the wire between Developer Unit and PW10520 PWB connected properly? No Connect it properly. Switch (MS4) 2 Is the actuator of Switch correctly pressed down when you close the Engine Unit or Toner Hatch? No Adjust the positions of Switch (or Toner Hatch and Engine Unit).