• Code: 004-417
• Description: Transfer Belt Assembly Change Soon Transfer Belt Assembly near end of life.
• Remedy: Replace the Transfer Belt Assembly (PL 5.3). The problem continues. Y↓N→Return to Service Call Procedures. Was the Transfer Belt Assembly HFSI Counter reset. Y↓N→Reset the Transfer Belt Assembly Counter. Replace the Engine Control Board (MCU PWB) (PL 13.1) CAUTION Careful replacement of the MCU NVRAM PWB is important to avoid serious machine failure. If the problem continues, replace the Engine Control Board (MCU PWB) NVRAM (PL 13.1).

• Code: 004-420
• Description: Transfer Belt Assembly Life End Transfer Belt Assembly end of life.
• Remedy: Replace the Transfer Belt Assembly (PL 5.3). The problem continues. Y↓N→Return to Service Call Procedures. Was the Transfer Belt Assembly HFSI Counter reset. Y↓N→Reset the Transfer Belt Assembly Counter. Replace the Engine Control Board (MCU PWB) (PL 13.1). CAUTION Careful replacement of the MCU NVRAM PWB is important to avoid serious machine failure. If the problem continues, replace the Engine Control Board (MCU PWB) NVRAM (PL 13.1).

• Code: 004-421
• Description: IBT Belt Cleaner Life End IBT Belt Cleaner Assembly end of life.
• Remedy: Replace the IBT Belt Cleaner Assembly (PL 5.3). The problem continues. Y↓N→Return to Service Call Procedures. Was the IBT Belt Cleaner Assembly HFSI Counter reset. Y↓N→Reset the IBT Belt Cleaner Assembly Counter. If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1). CAUTION Careful replacement of the MCU NVRAM PWB is important to avoid serious machine failure. If the problem continues, replace the Engine Control Board (MCU PWB) NVRAM (PL 13.1).

• Code: 004-435
• Description: HVPS Comm. Fail HVPS Communication failure.
• Remedy: 1. Check for poor connection at the blue-wired connector J574. 2. Turn off the printer and check the wiring between J574 and J411 for continuity or a shorted to ground condition. 3. If the wiring is OK, replace the HVPS Board. 4. If the HVPS Board does not correct the error, then replace the Engine Control Board (MCU PWB).

• Code: 004-605
• Description: Printer NVRAM Corrupt The system detected that the NVRAM of the Printer is empty.
• Remedy: Turn the printer power Off, then On. The problem continues. Y↓N→Return to Service Call Procedures. Replace the Engine Control Board (MCU PWB) (PL 13.1). CAUTION Careful replacement of the MCU NVRAM PWB is important to avoid serious machine failure. If the problem continues, replace the Engine Control Board (MCU PWB) NVRAM (PL 13.1).

• Code: 004-640
• Description: Belt Tracking IBT tracking failure.
• Remedy: BSD: CH9.19 CH9.31A Check if actuator for IBT Edge Sensor touches belt edge. IBT Edge Sensor touches belt edge. Y↓N→Check actuator installation. Turn the printer power On. Measure voltage between I/F PWB P539-A3(+) and GND(-). Between +3 VDC and 1 VDC is measured. Y↓N→Measure voltage between I/F PWB P539-A1(+) P539-A2(-). +5 VDC is measured. Y↓N→Check +5 VDC circuit to I/F PWB P539-A1. Measure voltage between I/F PWB P539-A3(+) and GND(-). +5 VDC is measured. Y↓N→Measure voltage between I/F PWB P539-A3(+) and GND(-). 0 VDC is measured. Y↓N→Check wire damage or bad connection between I/F PWB P539A and IBT Edge Sensor J119. If the check is good, replace IBT Edge Sensor. If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1). Check wire damage or bad connection between I/F PWB P539-A3 and IBT Edge Sensor J119-2. Replace IBT Edge Sensor. Measure voltage between I/F PWB P539-A1(+) and GND(-). +24 VDC is measured. Y↓N→Following Wire Network, check +24 VDC circuit up to I/F PWB P539-A1. Remove IBT Assembly. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Perform the Steering Motor test. IBT Steering Motor energizes. Y↓N→Check wire damage or bad connection between I/F PWB J537 and IBT Steering Motor P207. There are broken wires or bad connections. Y↓N→Replace the Engine Control Board (MCU PWB) (PL 13.1). If the problem continues, replace I/F PWB (PL 9.1). If the problem continues, replace IBT Steering Motor (PL 1.3). Repair broken wire and bad connection. Check IBT Belt installation. If the check is good, replace the Engine Control Board (MCU PWB) (PL 13.1).

• Code: 004-641
• Description: Belt Edge Not Detected IBT Belt Edge not detected.
• Remedy: Check if actuator for IBT Edge Sensor touches belt edge. IBT Edge Sensor touches belt edge. Y↓N→Check actuator installation. Turn the printer power On. Measure voltage between I/F PWB P539-A3(+) and GND(-). Between +3 VDC and 1 VDC is measured. Y↓N→Measure voltage between I/F PWB P539-A1(+) P539-A2(-). +5 VDC is measured. Y↓N→Close the Front Cover. If voltage between P539-A1(+) P539-A2(-) is less than +5 VDC, replace the Engine Control Board (MCU PWB) (PL 13.1). Measure voltage between I/F PWB P539-A3(+) and GND(-). +5 VDC is measured. Y↓N→Measure voltage between I/F PWB P539-A3(+) and GND(-). 0 VDC is measured. Y↓N→Check wire damage or bad connection between I/F PWB P539A and IBT Edge Sensor J119. If the check is good, replace IBT Edge Sensor. If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1). Check wire damage or bad connection between I/F PWB P539-A3 and IBT Edge Sensor J119-2. Replace the IBT Edge Sensor. Measure voltage between I/F PWB P539-A1(+) and GND(-). +24 VDC is measured. Y↓N→Following Wire Network, check +24 VDC circuit up to I/F PWB P539-A1. Remove IBT Assembly. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Perform the Steering Motor test. IBT Steering Motor energizes. Y↓N→Check wire damage or bad connection between I/F PWB J537 and IBT Steering Motor J207. There are broken wires or bad connections. Y↓N→Replace the Engine Control Board (MCU PWB) (PL 13.1). If the problem continues, replace the I/F PWB (PL 9.1). If the problem continues, replace the IBT Steering Motor (PL 1.3). Repair broken wire and bad connection. Check IBT Belt installation. If the check is good, replace the Engine Control Board (MCU PWB) (PL 13.1).

• Code: 004-642
• Description: Belt Edge Not in Position IBT Belt Edge not in position.
• Remedy: Check if actuator for IBT Edge Sensor touches belt edge. IBT Edge Sensor touches belt edge. Y↓N→Check actuator installation. Turn the printer power On. Measure voltage between I/F PWB P539-A3(+) and GND(-). Between +3 VDC and 1 VDC is measured. Y↓N→Measure voltage between the I/F PWB P539-A1(+) P539-A2(-). +5 VDC is measured. Y↓N→Close the Front Cover. If voltage between P539-A1(+) P539-A2(-) is less than +5 VDC, replace the Engine Control Board (MCU PWB) (PL 13.1). Measure voltage between I/F PWB P539-A3(+) and GND(-). +5 VDC is measured. Y↓N→Measure voltage between I/F PWB P539-A3(+) and GND(-). 0 VDC is measured. Y↓N→Check wire damage or bad connection between I/F PWB P539A and IBT Edge Sensor J119. If the check is good, replace the IBT Edge Sensor. If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1). Check wire damage or bad connection between I/F PWB P539-A3 and IBT Edge Sensor J119-2. Replace the IBT Edge Sensor. Measure voltage between I/F PWB P539-A1(+) and GND(-). +24 VDC is measured. Y↓N→Following Wire Network, check +24 VDC circuit up to I/F PWB P539-A1. Remove IBT Assembly. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Perform the Steering Motor test. IBT Steering Motor energizes. Y↓N→Check wire damage or bad connection between I/F PWB J537 and IBT Steering Motor J207. There are broken wires or bad connections. Y↓N→Replace the Engine Control Board (MCU PWB) (PL 13.1). If the problem continues, replace the I/F PWB (PL 9.1). If the problem continues, replace the IBT Steering Motor (PL 1.3). Repair broken wire and bad connection. Check IBT Belt installation. If the check is good, replace MCU PWB (PL 13.1).