• Code: E513
• Description: NVRAM Error
  - An error occurred in NVRAM on PWBA MCU.
• Causes: • PWBA MCU
• Remedy: 1 Does the error recur when the power is turned off and back on? Go to Step [4]. Go to Step [2]. 2 Does the error recur even when the power is turned off and back on again? Go to Step [4]. Go to Step [3]. 3 Does the error recur even after the power has been switched several times? Go to Step[4]. End of procedure* 4 Disconnect and re-connect all connectors connected to PWBA MCU. Does the error recur when the power is turned ON? Go to Step [5]. End of procedure 5 Check after replacement of PWBA MCU Replace PWBA MCU. Does the error recur when the power is turned ON? Go to “FIP-79 Electrical Noise”. End of procedure

• Code: E514
• Description: PAGE Timeout
  - The PAGEC/PAGE signal was not received within 60sec after transmitting PFA.
• Causes: • FFC-ASSY ESS • PWBA MCU • PWBA ESS
• Remedy: 1 Check of connection of FFC-ASSY ESS Re-connect FFC-ASSY ESS of PWBA ESS to PWBA MCU. Does the error recur when a test print is made? Go to Step [2]. End of procedure 2 Check of connection of FFC-ASSY ESS Is FFC-ASSY ESS damaged or broken? Replace FFCASSY ESS. Go to Step [3]. 3 Check after replacement of PWBA MCU Replace PWBA MCU. Does the error recur when a test print is made? Replace PWBA ESS. End of procedure

• Code: E516
• Description: Communication Error Duplex
  - A communication error occurred between PWBA MCU and Duplex.
• Causes: • HARNESS ASSY MAIN • HARNESS-ASSY DUP2 • PWBA DUP-L • PWBA MCU
• Remedy: 1 Check of Duplex attachment on printer Open and re-attach Duplex. Also, re-connect connector to printer. Does the error recur when the power is turned ON? Go to Step [2]. End of procedure 2 Continuity check of HARNESS ASSY MAIN Open Duplex, and disconnect the connector to the printer. Disconnect the P/J420 from PWBA MCU. Is the continuity normal between all terminals of J420 . J607? Go to Step [3]. Repair broken or shorted part. 3 Continuity check of HARNESS-ASSY DUP2 of Duplex Open Duplex, and disconnect the connector to the printer. Disconnect P/J443 from PWBA DUP-L. Is the continuity normal between all terminals of J443 . P607? Go to Step [4]. Replace HARNESSASSY DUP2. 4 Check after replacement of PWBA DUP-L Replace PWBA DUP-L. Does the error recur when the power is turned ON? Go to Step [5]. End of procedure 5 Check after replacement of PWBA MCU Replace PWBA MCU. Does the error recur when the power is turned ON? Go to Step [6]. End of procedure 6 Continuity check of HARNESS ASSY MAIN Disconnect P/J410 from PWBA MCU and P/ J502 from LV/HVPS. Is the continuity normal between all terminals of J410 . J502? Replace LV/ HVPS. Repair broken or shorted part.

• Code: E517
• Description: Communication Error Feeder
  - A communication error occurred between PWBA MCU and Feeder.
• Causes: • HARNESS ASSY MAIN • HARNESS-ASSY FEED 1 • HARNESS-ASSY FEED 2 • PWBA TRAY 500 • PWBA MCU • LV/HVPS
• Remedy: 1 Check of Feeder attachment on printer Remove and re-attach Feeder. Does the error recur when the power is turned ON? Go to Step [2]. End of procedure 2 Continuity check of HARNESS ASSY MAIN Remove Feeder from the printer. Disconnect P/J421 from PWBA MCU. Is the continuity normal between all terminals of J421 . J608 (connector on the printer to connect Feeder)? Go to Step [3]. Repair broken or shorted part. 3 Does the error recur when the power is turned ON? Go to Step [4]. End of procedure 4 Continuity check of HARNESS-ASSY FEED 1 of Feeder Remove Feeder. Disconnect P/J435 from PWBA TRAY 500. Is the continuity normal between all terminals of J435 . P608 (connector on Feeder to be connected to the printer)? Go to Step [5]. Replace HARNESSASSY FEED 1. 5 Check after replacement of PWBA TRAY 500 Replace PWBA TRAY 500. Does the error recur when the power is turned ON? Go to Step [6]. End of procedure 6 Check after replacement of PWBA MCU Replace PWBA MCU. Does the error recur when the power is turned ON? Go to Step [7]. End of procedure 7 Continuity check of HARNESS ASSY MAIN Disconnect P/J410 from PWBA MCU and P/ J502 from LV/HVPS. Is the continuity normal between all terminals of J410 . J502? Replace LV/ HVPS. Repair broken or shorted part.

• Code: E520
• Description: BTR 2 Advance Error
  - The 2nd BTR Retract Sensor does not turn ON within the specified time.
• Causes: • HARNESS ASSY MAIN • MOT ASSY MICRO • SENSOR 2BTR RETRACT • HARNESS ASSY ADC • PWBA MCU • LV/HVPS
• Remedy: 1 Check of DRIVE ASSY BTR attachment Is the DRIVE ASSY BTR attached correctly? Go to Step [2]. Re-attach, and go to step [2]. 2 Check of 2ND BTR ASSY attachment Is 2ND BTR ASSY attached correctly? Go to Step [4]. Re-attach, and go to step [3]. 3 Does the error recur when a test print is made? Go to Step [4]. End of procedure 4 Continuity check of HARNESS ASSY MAIN Disconnect the P/J403 from PWBA MCU. Do all of the wiring below have normal continuity? J403-1 . J600-3 J403-2 . J600-2 J403-3 . J600-1 Go to Step [5]. Repair broken or shorted part. 5 24 VDC power supply check to MOT ASSY MICRO (2nd BTR Retract Motor) The voltage of P403-3 . P403-2 on PWBA MCU is 24 VDC? Go to Step [6]. Go to Step [11]. 6 Check after replacement of MOT ASSY MICRO Replace MOT ASSY MICRO. Does the error recur when a test print is made? Go to Step [7]. End of procedure 7 5 VDC power supply check to SENSOR 2BTR RETRACT The voltage of P418-4 . P418-5 on PWBA MCU is 5 VDC? Go to Step [8]. Go to Step [11]. 8 Continuity check of HARNESS ASSY ADC Disconnect the P/J418 from PWBA MCU. Do all of the wiring below have normal continuity? J418-4 . J112-3 J418-5 . J112-2 J418-6 . J112-1 Go to Step [9]. Replace HARNESS ASSY ADC. 9 Check after replacement of SENSOR 2BTR RETRACT Replace SENSOR 2BTR RETRACT. Does the error recur when a test print is made? Go to Step [10]. End of procedure 10 Check after replacement of PWBA MCU Replace PWBA MCU. Does the error recur when a test print is made? Go to Step [12]. End of procedure

• Code: E521
• Description: BTR 2 Error
  - The input of 2nd BTR Retract Sensor does not change when 2nd BTR is initialized.
• Causes: • HARNESS ASSY MAIN • MOT ASSY MICRO • SENSOR 2BTR RETRACT • HARNESS ASSY ADC • PWBA MCU • LV/HVPS
• Remedy: 1 Check of 2ND BTR ASSY attachment Is 2ND BTR ASSY attached correctly? Go to Step [2]. Re-attach, and go to step [2]. 2 Does the error recur when restarting the printer? Go to Step [3]. End of procedure 3 Continuity check of HARNESS ASSY MAIN Disconnect the P/J403 from PWBA MCU. Do all of the wiring below have normal continuity? J403-1 . J600-3 J403-2 . J600-2 J403-3 . J600-1 Go to Step [4]. Repair broken or shorted part. 4 24 VDC power supply check to MOT ASSY MICRO (2nd BTR Retract Motor) The voltage of P403-3 . P403-2 on PWBA MCU is 24 VDC? Go to Step [5]. Go to Step [10]. 5 Check after replacement of MOT ASSY MICRO Replace MOT ASSY MICRO. Does the error recur when restarting the printer? Go to Step [6]. End of procedure 6 5 VDC power supply check to SENSOR 2BTR RETRACT. The voltage of P418-4 . P418-5 on PWBA MCU is 5 VDC? Go to Step [7]. Go to Step [10]. 7 Continuity check of HARNESS ASSY ADC Disconnect the P/J418 from PWBA MCU. Do all of the wiring below have normal continuity? J418-4 . J112-3 J418-5 . J112-2 J418-6 . J112-1 Go to Step [8]. Replace HARNESS ASSY ADC. 8 Check after replacement of SENSOR 2BTR RETRACT Replace SENSOR 2BTR RETRACT. Does the error recur when restarting the printer? Go to Step [9]. End of procedure 9 Check after replacement of PWBA MCU Replace PWBA MCU. Does the error recur when restarting the printer? Go to Step [11]. End of procedure 10 Power supply check to PWBA MCU Are each of the power voltages being supplied to the following terminals on PWBA MCU from LV/HVPS? P410-1 . P410-2: 3. 3VDC P410-3 . P410-4: 5VDC P410-5/6 .P410-7/8: 24VDC Replace PWBA MCU. Go to Step [11]. 11 Continuity check of HARNESS ASSY MAIN Are each of the power voltages being supplied to the following terminals on PWBA MCU from LV/HVPS? J410-1 . J502-1 J410-2 . J502-2 J410-3 . J502-3 J410-4 . J502-4 J410-5 . J502-5 J410-6 . J502-6 J410-7 . J502-7 J410-8 . J502-8 Replace LV/ HVPS. Repair broken or shorted part.

• Code: E523
• Description: PCDC Error
  - PCDC is not functioning normally.
• Causes: • Toner Cartridge K • Toner Cartridge Y • Toner Cartridge M • Toner Cartridge C
• Remedy: 1 Check after replacement of Toner Cartridge K/Y/M/C Replace Toner Cartridge K/Y/M/C. Does the error recur when the power is turned ON? Go to Step [2]. End of procedure 2 Check after replacement of PWBA MCU Replace PWBA MCU. Does the error recur when the power is turned ON? Go to FIP-1 81 Electrical Noise End of procedure

• Code: E524
• Description: Low Density
  - The output value of SENSOR ASSY ADC (ADC Sensor) is below the specified value.
• Causes: • Photoconductor Unit • SENSOR ASSY ADC • Toner Cartridge K • Toner Cartridge Y • Toner Cartridge M • Toner Cartridge C • HARNESS ASSY ADC • SENSOR HUM & TEMP • HARNESS ASSY MAIN • ROS ASSY • PWBA MCU • LV/HVPS
• Remedy: 1 Check of connection between Photoconductor Unit and CONDUCTOR attached to frame Is the contact surface of Photoconductor Unit and CONDUCTOR attached to the frame deformed or are there foreign objects on the surface? Clean, and go to Step [2]. Go to Step [2]. 2 Check of dirt and foreign bodies on surface of SENSOR ASSY ADC Are there any dirt or foreign bodies on the SENSOR ASSY ADC surface? Clean, and go to Step [3]. Go to Step [4]. 3 Does the error recur when the power is turned ON? Go to Step [4]. End of procedure 4 Check after replacement of Toner Cartridge Replace Toner Cartridge of each color. Does the error recur when the power is turned ON? Go to Step [5]. End of procedure 5 Check after replacement of Photoconductor Unit Replace Photoconductor Unit. Does the error recur when the power is turned ON? Go to Step [6]. End of procedure 6 5 VDC and 24 VDC power supply check to SENSOR ASSY ADC The voltage of P422-2 . P422-4 on PWBA MCU is 24 VDC? And the voltage of P422-8 . P422-4 is 5 VDC? Go to Step [7]. Go to Step [14]. 7 Continuity check of HARNESS ASSY ADC Disconnect P/J422 from PWBA MCU. Do all of the wiring below have normal continuity? J422-8 . J431-1 J422-4 . J431-5 J422-2 . J431-7 Go to Step [8]. Replace HARNESS ASSY ADC. 8 Check after replacement of SENSOR ASSY ADC Replace SENSOR ASSY ADC. Does the error recur when the power is turned ON? Go to Step [9]. End of procedure 9 5 VDC power supply check to SENSOR HUM & TEMP The voltage of P413-4 . P413-2 on PWBA MCU is 5 VDC? Go to Step [10]. Go to Step [14]. 10 Continuity check of HARNESS ASSY MAIN Disconnect P/J413 from PWBA MCU. Do all of the wiring below have normal continuity? J413-1 . J104-4 J413-2 . J104-3 J413-3 . J104-2 J413-4 . J104-1 Go to Step [11]. Repair broken or shorted part.