• Code: 004-358
• Description: Controller Communication Fail Failure occurred in Printer Communication.
• Remedy: 1. Cycle power to the printer to clear the error. 2. Turn the printer power Off. 3. Remove the Image Processor Board. 4. Inspect the orange ribbon cable between the Relay Board and Engine Control Board. 5. Is the connector fully seated and free from damage? Replace in the following order: 1. Image Processor Board 2. Electrical Chassis Assembly 3. Engine Control Board (MCU PWB)

• Code: 004-361
• Description: Imaging Unit Motor Fail Imaging Unit Motor has failed.
• Remedy: 1 1. 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 Imaging Unit Motor test. 2. Does the Motor operate correctly? Go to step 7. Go to step 2. 2 Is the voltage at J535-5 +5 VDC? Go to step 3. Replace the I/F PWB. 3 Is the voltage at J535-10 +24 VDC? Go to step 4. Replace the I/F PWB. 4 1. Enter Service Diagnostics Menu. 2. While running the Imaging Unit Motor test, check the voltage at J535-1 and J535-2. 3. Is the voltage 0 VDC while the test is running? Go to step 5. Replace the I/F PWB. 5 Is the frequency between J535-4 and ground between 1 KHz and 1.3 KHz? Replace the Imaging Unit Drive Motor. Go to step 6. 6 1. Check for a short to ground at J535-4. 2. Is the wire grounded? Repair or replace the wiring harness. Replace the I/F PWB. 7 1. Enter Service Diagnostics Menu. 2. While running the Imaging Unit Motor test, check the voltage at J535-7. 3. Is the voltage +5 VDC while the test is running? Replace the Imaging Unit Drive Motor. Replace the I/F PWB.

• Code: 004-362
• Description: Printer NVM Read Write Fail Read Write at the Engine Control Board (MCU PWB) NVM R/W.
• Remedy: 1. Cycle power to the printer to clear the error. 2. Did this clear the error? Complete. Replace the following order: 1. Engine Control Board (MCU PWB) 2. Image Processor Board

• Code: 004-363
• Description: K Imaging Unit Motor Fail Imaging Unit Motor K failure.
• Remedy: 1 1. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Run the Black Imaging Motor test. 2. Does the Motor operate correctly? Go to step 7. Go to step 2. 2 Is the voltage at J535-6 +5 VDC? Go to step 3. Refer to BSD 8.2 Paper Transportation) to troubleshoot the missing + 5 VDC . 3 Is the voltage at J535-10 +24 VDC? Go to step 4. Refer to BSD 8.2 Paper Transportation) to troubleshoot the missing + 5 VDC . 4 Perform the Black Imaging Unit Motor test. Is the voltage at J535-5 0 VDC with the test running? Go to step 5. Refer to BSD 8.2 Paper Transportation) to troubleshoot . 5 Is the frequency between J535-8 and ground between 1 KHz and 1.3 KHz? Replace the Black Imaging Unit Drive Motor. Go to step 6. 6 Is the frequency between J535-2 and ground between 1KHz and 1.3 KHz? Check for an open circuit between J534A-8 and J535- 8. Replace in order until resolved: 1. Engine Interface Board 2. Engine Control Board (MCU PWB) 7 Is +3.3 VDC present at J535-7 with the Motor test running from Service Diagnostics? Is there is no mechanical blind in the Black Imaging Unit, replace the Black Drum Drive Motor. Refer to - BSD 8.2 Paper Transportation) to troubleshoot the missing +3.3 VDC .

• Code: 004-371
• Description: Printer Controller System Timing Fail There is a communication failure between the Controller and Printer.
• Remedy: 1. Cycle power the printer to clear the error. 2. Did the error clear? Complete. Replace the Engine Control Board (MCU PWB).

• Code: 004-376
• Description: Zero Crossing Signal Not Detected The zero crossing signal is not detected.
• Remedy: Check that J590 on the AC Drive PWB (PL 9.2) is securely connected. Check that J412 on the Engine Control Board (MCU PWB) (PL 13.1) is securely connected. Check the condition of the wires between J590 and J412. The connections and wires are good. Y↓N→Repair as required. Measure the voltage at 590-1 on the AC Drive PWB (pin 1 is toward inside of machine). Check for both DC and AC voltages of 0.44 VDC and 0.92 VAC. The voltage measures approximately 0.5 VDC and 1 VAC. Y↓N→Measure the voltage at J590-7 (pin 1 is toward inside of machine) for +5 VDC. The voltage measures +5 VDC. Y↓N→The wires were previously checked. Replace the Engine Control Board) (MCU PWB (PL 13.1). Measure the voltage at J590-5 (pin 1 is toward inside of machine) for less than +1 VDC. The voltage measures less than 1 VDC. Y↓N→The wires were previously checked. Replace the Engine Control Board (MCU PWB) (PL 13.1). Replace the AC Drive PWB (PL 9.2). Measure the voltage at J412-19 on the Engine Control Board (MCU PWB). The voltage measures less than 1 VDC. Y↓N→Repair the open circuit between J590-1 on the AC Drive PWB and J412-19 on the Control Board (MCU PWB). Replace the Engine Control Board (MCU PWB) (PL 13.1).

• Code: 004-414
• Description: IBT Belt Cleaner Change Soon IBT Belt Cleaner near 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. 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: 004-415
• Description: 2nd BTR Unit Change Soon It is time to replace the 2nd BTR Unit.
• Remedy: Replace the 2nd BTR Unit (PL 2.8). The problem continues. Y↓N→Return to Service Call Procedures. Was the 2nd BTR Unit HFSI Counter reset. Y↓N→Reset the 2nd BTR Unit 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).