[SOLVED] Quick fix Konica-Minolta 4000P list error codes

[SOLVED] Quick fix Konica-Minolta 4000P list error codes

– Compatible Printer model: Konica-Minolta bizhub 4000P
– Konica-Minolta bizhub 4000P Error Codes with quick guides:

• Code: 111
• Description: 111.00 Pel clock check failed. 111.01 Downlevel ASIC detected. 111.31 Printhead never delivered HSYNCs. 111.32 Printhead lost HSYNCs. 111.40 Wrong printhead installed 111.50 Open-loop printhead error, open-loop sweep state. 111.51 111.52 Open-loop printhead error, check prelim amp state. 111.53 Open-loop printhead error, enable amp Kp state. 111.54 Closed-loop printhead error, amp Kp failed to converge. 111.55 Closed-loop printhead error while waiting for amp Kp to converge. 111.56 Closed-loop printhead error, amp Ki failed to converge. 111.57 Closed-loop printhead error while waiting for amp Ki to converge. 111.58 Closed-loop printhead error, load scan regs state. 111.59 Closed-loop printhead error, forward and reverse capture times differ by too much. 111.60 Closed-loop printhead sweep error, check sweep accuracy state. 111.61 Printhead drive control out of range due to an external event beyond what the control is designed to handle. 111.62 Closed-loop printhead error, off-resonant PI effort state. 111.63 Timed out on POR sweep. 111.64 Attempted to exceed open loop drive limits. 111.65 111.66 Failed alignment of printhead. 111.67 111.68 Too many fake HSYNCs while aligning printhead. 111.69
• Troubleshooting Guides: Step 1 Check the LSU cables JVIDEO1 and JGLV1 for proper connection. Are they properly connected? Go to step 2. Reseat the cables.
  Step 2 Inspect the LSU cables and connectors. Are they free of damage? Replace the controller board. See Controller board removals. Replace the LSU. See Laser scanning unit (LSU) removal.

• Code: 121
• Description: 121.07 Fuser has been on for more than allowed after a gap blowout, and the temperature is still too cold. 121.08 Fuser was under temp when page was in fuser. 121.20 Fuser undertemp during steady state control. Can occur in printing or standby modes. 121.22 Fuser did not warm enough to start line voltage detection. 121.23 Fuser took too long to heat to line detection temp. 121.24 Fuser never reached detection temperature. 121.25 After line voltage detection, control did not roll over to steady state control in time. 121.26 Failed to reach temperature during warm up. 121.28 Failed to reach EP warm up temperature in time. 121.29 Fuser failed to reach pre-heat temperature for motor start during warm up. 121.30 Fuser failed to reach printing temperature by the time a page reached the fuser. 121.31 Fuser is too hot. Global overtemp check. 121.32 Open fuser main thermistor. 121.33 Open fuser edge thermistor. 121.34 Open fuser backup roll thermistor. 121.35 Attempting to POR after receiving a 121.34. 121.36 Fuser did not heat to allow compression jog. 121.37 Fuser heated faster than allowed during line voltage detection.
• Troubleshooting Guides: Step 1 • Check the fuser cables JTHERM1 and JEXIT for proper connection to the controller board. • Check the cable PCN5 for proper connection to the power supply. Are they properly connected?
  Step 2 Are the cables JTHERM1, JEXIT and PCN5 free of damage? Go to step 3. Replace the fuser. See Fuser removal.
  Step 3 1. Turn off the printer. 2. Remove the rear door and cover. 3. Disconnect the fuser cable connected to PCN5 of the power supply. 4. Check for approximate correct resistance on the fuser cable: – 220V fuser-43 ohms – 110V fuser-10 ohms – 100V fuser-8 ohms Is the resistance equal to any of the above values? Perform an LVPS service check. See LVPS service check. Replace the fuser. See Fuser removal.
  Step 4 Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Perform a cooling fan service check and LVPS service check. See 171.xx Cooling fan service check and LVPS service check. Replace the fuser. See Fuser removal.

• Code: 126
• Description: 126.01 Line frequency outside operating range of device. 126.02 No line frequency detected.
• Troubleshooting Guides: Step 1 Check if the power supply cable is properly connected to the controller board. Is it properly connected? Go to step 2. Reseat the cables.
  Step 2 1. Turn off the printer. 2. Remove the power cord. 3. Measure the resistance between terminals A and D of the power supply socket. Is the resistance approximately 30 ohms? Contact your next level of support. Replace the power supply. See Power supply removal.

• Code: 132
• Description: 132.01 TDS baseline too low. 132.02 TDS baseline too high. 132.03 TDS baseline excessive range. 132.16 TDS calibration at maximum. 132.17 TDS calibration too low. 132.18 TDS calibration too close to baseline. 132.32 PC drum measurement too high. 132.33 PC drum measurement too different from calibration. 132.34 PC drum measurement too close to baseline.
• Troubleshooting Guides: Step 1 Remove the transfer roll, and check for loose toner blocking the toner density sensor. Is it free of loose toner? Go to step 2. Clean the sensor.
  Step 2 Check the toner density sensor for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Go to step 3. Reinstall the wiper properly. If it still cannot move freely, replace the toner density sensor. See Toner density sensor removal.
  Step 3 Check the toner density sensor cable for proper connection to the controller board. Is it properly connected? Go to step 4. Reseat the cable.
  Step 4 Check the toner density sensor cable for damage and pinch points. Is it free of damage? Replace the controller board. See Controller board removals. Replace the toner density sensor. See Toner density sensor removal.

• Code: 133
• Description: 133.05 CTLS reading above maximum expected value. 133.06 CTLS reading below minimum expected value. 133.08 Excessive CTLS noise.
• Troubleshooting Guides: Step 1 Check for loose toner blocking the CTLS. Is it free of any loose toner? Go to step 2. Clean the CTLS.
  Step 2 • Check the cable PCN3 for proper connection to the power supply. • Check the CTLS cable for proper connection to the controller board. Are they properly connected?
  Step 3 Check the cable PCN3 and CTLS cable for damage. Are they free of damage? Replace the controller board. See Controller board removals. Replace the printer.

• Code: 140
• Description: 140.10 Transport motor halls not detected. 140.20 Transport motor took too long to stop. 140.30 Transport motor unable to lock (before motor ID). 140.40 Transport motor overspeed detected. 140.60 Transport motor unable to lock (after motor ID). 140.70 Transport motor out of lock detected. 140.80 Transport motor excessive PWM or temperature.
• Troubleshooting Guides: Step 1 Remove the main drive gearbox and check for any debris. Is it free of debris? Go to step 2. Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Go to step 3. Replace the main drive gearbox. See Main drive gearbox removal.
  Step 3 Check the main drive motor for proper operation: 1. Remove the main drive gearbox. Note: Do not disconnect the main drive gearbox cable. 2. POR into the Diagnostics menu and perform a feed test: Diagnostics Menu >Input Tray Tests >Feed Test > Select any input source 3. Check if the main drive motor rotates when doing the feed test. Does it rotate when doing the feed test? Replace the controller board. See Controller board removals. Replace the main drive gearbox. See Main drive gearbox removal.

• Code: 146
• Description: 140.80 Autocompensator Pick/Lift Motor-Encoder Never Detected in tray 1.
• Troubleshooting Guides: Step 1 1. Remove Tray 1. 2. Check the lift plate and gears for proper operation by moving the metal plate. Do the lift plate and gears move freely, and are they free of wear or damage? Go to step 2. Replace the tray insert.
  Step 2 Check the pick/lift motor gearbox for the following: • Gear tooth breakage • Freedom of rotation Is it free of wear or damage? Go to step 3. Replace the pick/lift motor gearbox. See Pick/Lift motor gearbox removal.
  Step 3 Check the cable JLIFT1 on the controller board. Is it properly connected and free of damage? Go to step 4. Replace the pick/lift motor gearbox. See Pick/Lift motor gearbox removal.
  Step 4 Replace the controller board. Does this fix the problem? The problem is solved. Contact the next level of support.

• Code: 155
• Description: 155.00 No encoder received from auger motor.
• Troubleshooting Guides: Step 1 Is the button aligned with the front of the toner cartridge? Go to step 2. Go to step 3.
  Step 2 1. Remove the toner cartridge. 2. Clear the paper jam. Does the problem remain? Go to step 5. The problem is solved.
  Step 3 1. Remove, and then reinstall the toner cartridge. Make sure that it is properly seated. 2. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. 3. Make sure that the latest firmware is installed. Does the problem remain? Go to step 4. The problem is solved.
  Step 4 Run a print test. Does the problem remain? Go to step 5. The problem is solved.
  Step 5 Replace the toner cartridge Does the problem remain? Go to step 6. The problem is solved.
  Step 6 Check the gears on the cartridge gearbox for proper rotation and for wear or damage. Does it rotate properly and is it free of wear or damage? Go to step 7. Replace the cartridge gearbox. See Cartridge gearbox removal.
  Step 7 Check the cartridge gearbox cable for proper connection to the controller board. Is it properly connected? Go to step 8. Reseat the cable.
  Step 8 Check the cartridge gearbox cable for damage. Is it free of damage? Replace the controller board. See Controller board removal. Replace the cartridge gearbox. See Cartridge gearbox removal.

• Code: 171
• Description: 171.03 Fuser fan error. 171.04 Fuser fan error. 171.05 Fuser fan error. 171.06 Fuser fan error. 171.07 Fuser fan error.
• Troubleshooting Guides: Step 1 1. Make sure that the cable JFAN1 is properly connected to the controller board. 2. Check if the cooling fan is rotating properly. Is it rotating properly? Go to step 2. Replace the cooling fan. See Cooling fan removal.
  Step 2 1. Turn off the printer, and disconnect JFAN1 from the controller board. 2. Turn on the printer, and measure the voltage across JFAN1. Is the voltage approximately 24 V? Go to step 3. Replace the controller board. See Controller board removal.
  Step 3 Is the fan idle? Replace the cooling fan. See Cooling fan removal. The problem is solved.

• Code: 31.21 … 31.25
• Description: 31.21 Capacitive Toner Level Sensing (CTLS) reading out of range. 31.22 Excessive CTLS noise. 31.23 Abrupt change detected in CTLS reading.
• Troubleshooting Guides: Step 1 Check for loose toner blocking the CTLS. Is it free of any loose toner? Go to step 2. Clean the CTLS.
  Step 2 • Check the cable PCN3 for proper connection to the power supply. • Check the CTLS cable for proper connection to the controller board. Are they properly connected? Go to step 3. Reseat the cables.
  Step 3 Check the cable PCN3 and CTLS cable for damage. Are they free of damage? Replace the controller board. See Controller board removals. Replace the printer.

• Code: 31.40 … 31.45
• Description: 31.40 Toner cartridge smart chip error 31.41 Toner cartridge I2C packet timeout 31.42 Toner cartridge I2C packet has been sent but code timed-out on receiving the data (callback) 31.43 Toner cartridge security error in the send challenge sequence 31.44 Toner cartridge ROM signature error 31.45 Toner cartridge stuck busy (Status register and/or CRI Arbiter register report busy)
• Troubleshooting Guides: Step 1 a. Make sure that the toner cartridge is properly installed. b. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. c. Check if the toner cartridge is supported. Replace with a supported toner cartridge if necessary. d. Make sure that the latest firmware is installed. Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the cable JARW1 for proper connection to the controller board. Is it properly connected? Go to step 3. Reseat the cable.
  Step 3 Check the toner cartridge smart chip contact for damaged pins. Is it free of damage? Replace the controller board. See Controller board removals. Replace the toner cartridge smart chip contact. See Toner cartridge smart chip contact removal.

• Code: 31.46
• Description: Toner failed to replenish into the imaging unit
• Troubleshooting Guides: Step 1 Is the button aligned with the front of the toner cartridge? Go to step 2. Go to step 3.
  Step 2 1. Remove the toner cartridge. 2. Clear the paper jam. Does the problem remain? Go to step 5. The problem is solved.
  Step 3 1. Remove, and then reinstall the toner cartridge. Make sure that it is properly seated. 2. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. 3. Make sure that the latest firmware is installed. Does the problem remain? Go to step 4. The problem is solved.
  Step 4 Run a print test. Does the problem remain? Go to step 5. The problem is solved.
  Step 5 Replace the toner cartridge Does the problem remain? Go to step 6. The problem is solved.
  Step 6 Check the gears on the cartridge gearbox for proper rotation and for wear or damage. Does it rotate properly and is it free of wear or damage? Go to step 7. Replace the cartridge gearbox. See Cartridge gearbox removal.
  Step 7 Check the cartridge gearbox cable for proper connection to the controller board. Is it properly connected? Go to step 8. Reseat the cable.
  Step 8 Check the cartridge gearbox cable for damage. Is it free of damage? Replace the controller board. See Controller board removal. Replace the cartridge gearbox. See Cartridge gearbox removal.

• Code: 31.60 … 31.65
• Description: 31.60 Imaging unit smart chip error 31.61 Imaging unit I2C packet timeout 31.62 Imaging unit I2C packet has been sent but code timed-out on receiving the data (callback) 31.63 Imaging unit security error in the send challenge sequence 31.64 Imaging unit ROM signature error 31.65 Imaging unit stuck busy (status register and/or CRI Arbiter register report busy)
• Troubleshooting Guides: Step 1 a. Make sure that the toner cartridge is properly installed. b. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. c. Check if the toner cartridge is supported. Replace with a supported toner cartridge if necessary. d. Make sure that the latest firmware is installed. Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the cable JARW1 for proper connection to the controller board. Is it properly connected? Go to step 3. Reseat the cable.
  Step 3 Check the toner cartridge smart chip contact for damaged pins. Is it free of damage? Replace the controller board. See Controller board removals. Replace the toner cartridge smart chip contact. See Toner cartridge smart chip contact removal.

• Code: 31.66
• Description: Toner failed to replenish into the imaging unit
• Troubleshooting Guides: Step 1 Is the button aligned with the front of the toner cartridge? Go to step 2. Go to step 3.
  Step 2 1. Remove the toner cartridge. 2. Clear the paper jam. Does the problem remain? Go to step 5. The problem is solved.
  Step 3 1. Remove, and then reinstall the toner cartridge. Make sure that it is properly seated. 2. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. 3. Make sure that the latest firmware is installed. Does the problem remain? Go to step 4. The problem is solved.
  Step 4 Run a print test. Does the problem remain? Go to step 5. The problem is solved.
  Step 5 Replace the toner cartridge Does the problem remain? Go to step 6. The problem is solved.
  Step 6 Check the gears on the cartridge gearbox for proper rotation and for wear or damage. Does it rotate properly and is it free of wear or damage? Go to step 7. Replace the cartridge gearbox. See Cartridge gearbox removal.
  Step 7 Check the cartridge gearbox cable for proper connection to the controller board. Is it properly connected? Go to step 8. Reseat the cable.
  Step 8 Check the cartridge gearbox cable for damage. Is it free of damage? Replace the controller board. See Controller board removal. Replace the cartridge gearbox. See Cartridge gearbox removal.

• Code: 32.01 … 32.10
• Description: 32.01 Capacity Class/ Model compatibility mismatch. The supplies CC/MC is not compatible with the printer’s CC/MC setting. 32.05 OEM Mismatch. The supplies OEM ID is not compatible with the printer’s machine class. 32.10 Toner cartridge smart chip compatibility error
• Troubleshooting Guides: Step 1 a. Make sure that the toner cartridge is properly installed. b. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. c. Check if the toner cartridge is supported. Replace with a supported toner cartridge if necessary. d. Make sure that the latest firmware is installed. Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the cable JARW1 for proper connection to the controller board. Is it properly connected? Go to step 3. Reseat the cable.
  Step 3 Check the toner cartridge smart chip contact for damaged pins. Is it free of damage? Replace the controller board. See Controller board removals. Replace the toner cartridge smart chip contact. See Toner cartridge smart chip contact removal.

• Code: 32.11
• Description: Imaging unit smart chip compatibility error
• Troubleshooting Guides: Step 1 a. Make sure that the toner cartridge is properly installed. b. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. c. Check if the toner cartridge is supported. Replace with a supported toner cartridge if necessary. d. Make sure that the latest firmware is installed. Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the cable JARW1 for proper connection to the controller board. Is it properly connected? Go to step 3. Reseat the cable.
  Step 3 Check the toner cartridge smart chip contact for damaged pins. Is it free of damage? Replace the controller board. See Controller board removals. Replace the toner cartridge smart chip contact. See Toner cartridge smart chip contact removal.

• Code: 34
• Description: Media size mismatch (too short or too narrow)
• Troubleshooting Guides: Step 1 1. Make sure the media size setting matches the paper in the tray. 2. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 3. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the input tray for damage. Is it free of damage? Go to step 3. Replace the input tray.
  Step 3 1. Make sure the index sensor is free of debris. 2. Check it for damage. Is it free of damage? Go to step 4. Replace the index sensor. See Index sensor removal.
  Step 4 1. Make sure the trailing edge sensor is free of debris. 2. Check it for damage. Is it free of damage? Go to step 5. Replace the trailing edge sensor. See Trailing edge sensor removal.
  Step 5 1. Make sure the input sensor is free of debris. 2. POR into the Diagnostics menu and perform a sensor test: Diagnostics Menu >Base Sensor Test >Input Does the sensor state on the control panel display change when it is toggled? Go to step 6. Replace the input sensor. See Duplex sensor and input sensor removal.
  Step 6 POR into the Diagnostics menu and perform a sensor test: Diagnostics Menu >Base Sensor Test >Narrow Media Does the sensor state on the control panel display change when it is toggled? Go to step 7. Replace the narrow media/bin full sensor. See Narrow media/bin full sensor removal.
  Step 7 1. Remove the main drive gearbox. 2. Check the gears for wear or damage. 3. Check the main drive motor for rotation. Are the gears free of wear or damage and does the main drive motor rotate? Go to step 8. Replace the main drive gearbox. See Main drive gearbox removal.
  Step 8 Replace the controller board. Does the error remain? Problem is solved. Contact the next level of support.

• Code: 35
• Description: Res save off deficient memory
• Troubleshooting Guides: Step 1 Disable the Resource save feature: Settings >Print Settings >Setup Menu >Resource Save >Off Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the memory card for proper installation. Is it properly installed? Go to step 3. Reseat the memory card.
  Step 3 a. Print the Menu settings page: Settings >Reports >Menu Settings Page b. POR into the Configuration menu and reset the printer’s settings to factory default: Configuration Menu >Factory Defaults >Restore Base c. Remove the memory card. d. Restart the printer. Does the error remain? Replace the controller board. See Controller board removals. Replace the memory card.

• Code: 37
• Description: Insufficient collation area
• Troubleshooting Guides: Step 1 Disable the Resource save feature: Settings >Print Settings >Setup Menu >Resource Save >Off Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the memory card for proper installation. Is it properly installed? Go to step 3. Reseat the memory card.
  Step 3 a. Print the Menu settings page: Settings >Reports >Menu Settings Page b. POR into the Configuration menu and reset the printer’s settings to factory default: Configuration Menu >Factory Defaults >Restore Base c. Remove the memory card. d. Restart the printer. Does the error remain? Replace the controller board. See Controller board removals. Replace the memory card.

• Code: 38
• Description: Memory full
• Troubleshooting Guides: Step 1 Disable the Resource save feature: Settings >Print Settings >Setup Menu >Resource Save >Off Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the memory card for proper installation. Is it properly installed? Go to step 3. Reseat the memory card.
  Step 3 a. Print the Menu settings page: Settings >Reports >Menu Settings Page b. POR into the Configuration menu and reset the printer’s settings to factory default: Configuration Menu >Factory Defaults >Restore Base c. Remove the memory card. d. Restart the printer. Does the error remain? Replace the controller board. See Controller board removals. Replace the memory card.

• Code: 41
• Description: Bottle/IU toner type mismatch
• Troubleshooting Guides: Step 1 Check if the toner cartridge is supported. Replace with a supported toner cartridge if necessary. Does the problem remain? Go to step 2. The problem is solved.
  Step 2 a. Make sure the toner cartridge smart chip contact cable JARW1 is properly connected to the controller board. b. Make sure the toner cartridge smart chip contact is free of debris. c. Check the toner cartridge smart chip contact for damaged pins. Is it free of damage? Go to step 2. Replace the toner cartridge smart chip contact. See Toner cartridge smart chip contact removal.
  Step 3 Check if the firmware level matches the serial number. Do they match? Replace the controller board. See Controller board removals. Reflash the firmware.

• Code: 42
• Description: Printer/cartridge mismatch
• Troubleshooting Guides: Step 1 Check if the toner cartridge is supported. Replace with a supported toner cartridge if necessary. Does the problem remain? Go to step 2. The problem is solved.
  Step 2 a. Make sure the toner cartridge smart chip contact cable JARW1 is properly connected to the controller board. b. Make sure the toner cartridge smart chip contact is free of debris. c. Check the toner cartridge smart chip contact for damaged pins. Is it free of damage? Go to step 2. Replace the toner cartridge smart chip contact. See Toner cartridge smart chip contact removal.
  Step 3 Check if the firmware level matches the serial number. Do they match? Replace the controller board. See Controller board removals. Reflash the firmware.

• Code: 52
• Description: Flash full
• Troubleshooting Guides: Step 1 Format the flash memory. Navigate to Settings > Print Settings > Utilities, then select Format Flash. Does the error remain? Go to step 2. The problem is solved.
  Step 2 Remove the installed memory, and then POR the machine. Does the error remain? Go to step 3. Reseat the memory card.
  Step 3 Replace the controller board. See Controller board removals. Does the error remain? Contact the next level of support. The problem is solved.

• Code: 54
• Description: Network error
• Troubleshooting Guides: Step 1 If the device is physically connected to the network, verify that the Ethernet cable is properly connected on both ends. Is the cable properly connected? Go to step 3. If the network is wireless, then go to step 3. Go to step 2.
  Step 2 Connect the Ethernet cable. Does this fix the problem. The problem is solved. Go to step 3.
  Step 3 Check the printer’s online status under Printers on the host computer. Delete all print jobs in the print queue. Is the printer online and in a Ready state? Go to step 5. Go to step 4.
  Step 4 Change the printer status to online. Did this fix the issue? The problem is solved. Go to step 5.
  Step 5 Does the IP address displayed on the network settings page match the IP address in the port of the drivers using the printer? Go to step 10. Go to step 6.
  Step 6 Does the LAN use DHCP? Note: A printer should use a static IP address on a network. Go to step 7. Go to step 9.
  Step 7 Are the first two segments of the IP address 169.254 Go to step 8. Go to step 9.
  Step 8 POR the printer. Did this resolve the issue? The problem is solved. Go to step 10.
  Step 9 Reset the address on the printer to match the IP address on the driver. Did this resolve the issue? The problem is solved. Go to step 10.
  Step 10 Have the network admin verify that the printer and PC’s IP address have identical subnet addresses. Are the subnet addresses the same? Go to step 12. Go to step 11.
  Step 11 Using the subnet address supplied by the network administrator, assign a unique IP address to the printer. Note: The printer IP address should match the IP address on the printer driver. Did this fix the problem? The problem is solved. Go to step 12.
  Step 12 Is the device physically connected (Ethernet cable) to the network? Go to step 13. Go to step 15.
  Step 13 Try using a different Ethernet cable. Did this fix the problem? The problem is solved. Go to step 14.
  Step 14 Have the network administrator check the network drop for activity. Is the network drop functioning properly? Replace the controller board. See Controller board removals. Contact the network administrator.
  Step 15 Is the printer on the same wireless network as the other devices? Go to step 17. Go to step 16.
  Step 16 Assign the correct wireless network to the printer. Did this fix the problem? The problem is solved. Go to step 17.
  Step 17 Are the other devices on the wireless network communicating properly? Go to step 18. Contact the network administrator.
  Step 18 Verify that the wireless card is properly seated on the controller board. Is the wireless card seated correctly? Go to step 20. Go to step 19.
  Step 19 Properly reseat the wireless card. Did this fix the problem? The problem is solved. Go to step 20.
  Step 20 Replace the wireless card. Did this fix the problem? The problem is solved. Go to step 21.
  Step 21 Replace the controller board. See Controller board removals. Did this fix the problem? The problem is solved. Contact the next level of support.

• Code: 80
• Description: Maintenance kit
• Troubleshooting Guides: Replace the maintenance kit and reset the Maintenance counter. Does the error remain? Contact the next level of support. The problem is solved.

• Code: 84
• Description: Imaging unit low
• Troubleshooting Guides: Step 1 Replace the imaging unit. Does the error remain? Go to step 2. The problem is solved.
  Step 2 a. Make sure the imaging unit smart chip contact cable is properly connected to the controller board. b. Make sure the contact is free of debris. Does the error remain? Go to step 3. The problem is solved.
  Step 3 Check the contacts for damaged pins. Are they free of damage? Contact the next level of support. Replace the printer.

• Code: 88
• Description: Toner cartridge low
• Troubleshooting Guides: Step 1 Replace the toner cartridge. Does the error remain? Go to step 2. The problem is solved.
  Step 2 a. Make sure the toner cartridge smart chip contact cable JARW1. b. Make sure the contact is free of debris. Does the error remain? Go to step 3. The problem is solved.
  Step 3 Check the contacts for damaged pins. Are they free of damage? Contact the next level of support. Replace the toner cartridge smart chip contact. See Toner cartridge smart chip contact removal.

• Code: 900
• Description: RIP firmware errors
• Troubleshooting Guides: Step 1 POR the printer. Does the error remain? Go to step 2. The problem is solved.
  Step 2 1. Write down the exact 900.xx error code displayed on the device. 2. Turn off the printer. 3. Clear the print queues. 4. Disconnect all communication cables, and remove all memory options. 5. Remove any installed internal option. 6. POR the printer into the Diagnostics menu. Does the error remain during startup? Go to step 3. Go to step 6.
  Step 3 Check all the cables connected to the controller board for proper connectivity. Are the cables properly connected? Go to step 5. Go to step 4.
  Step 4 1. Properly connect the cables to the controller board. 2. POR the printer into the Diagnostics menu. Does the error remain during startup? Go to step 5. Go to step 6.
  Step 5 1. Replace the controller board. 2. POR the printer. Does the error remain during startup? Note: If an error different from the original 900.xx is displayed, consult the service check for that error. Go to step 21. The problem is solved.
  Step 6 Print the following: • Error log • Menu settings page • Network settings page Does the error remain while these pages were printing? Go to step 21. Go to step 7.
  Step 7 Note: Before performing this step, write down the following information about the file being sent to the printer: • Application used • Operating system • Driver type • File type (PCL, PostScript, XPS, etc.) 1. Reattach the communications cable. 2. POR the printer. 3. Send the printer a print job. Does the error remain? Go to step 8. Go to step 10.
  Step 8 1. POR the printer. 2. Send a different print job to the printer. Does the error remain? Go to step 9. Go to step 10.
  Step 9 1. Upgrade the firmware. Note: Contact your next level of support for the correct firmware level to use. 2. POR the printer. 3. Send the printer a print job. Does the error remain? Go to step 21. Go to step 10.
  Step 10 1. Upgrade the firmware if it was not upgraded in a previous step. Note: Contact your next level of support for the correct firmware level to use. 2. POR the printer. 3. Send the printer a print job. Does the error remain? Go to step 11. The problem is solved.
  Step 11 Is there optional memory installed? Go to step 12. The problem is solved.
  Step 12 1. Reinstall the first internal option. 2. POR the printer. Does the error remain? Go to step 14. Go to step 13.
  Step 13 1. Run a job to test the option. Does the error remain? Go to step 14. Go to step 16.
  Step 14 1. Upgrade the firmware if it was not upgraded in a previous step. Note: Contact your next level of support for the correct firmware level to use. 2. POR the printer. 3. Send the printer a print job. Does the error remain? Go to step 15. The problem is solved.
  Step 15 1. Replace the faulty internal option. 2. POR the printer. Does the error remain? Go to step 21. Go to step 16.
  Step 16 Are there any more internal options to install? Go to step 17. The problem is solved.
  Step 17 1. Install the next internal option. 2. POR the printer. Does the error remain? Go to step 19. Go to step 18.
  Step 18 Run a job to test the option. Does the error remain? Go to step 19. Go to step 16.
  Step 19 1. Upgrade the firmware if it was not upgraded in a previous step. Note: Contact your next level of support for the correct firmware level to use. 2. POR the printer. 3. Send the printer a print job. Does the error remain? Go to step 20. Go to step 16.
  Step 20 1. Replace the faulty internal option. 2. POR the printer. Does the error remain? Go to step 21. Go to step 16.
  Step 21 Contact your next level of support. You will need the following information: • Exact 900.xx error digits and complete error message • Printed menu settings page • Printed network settings page • Device error log • A sample print file if the error appears to be isolated to a single file • File/Application used if the error is related to specific print file • Device operating system • Driver used (PCL/PS) • Frequency of the occurrence of the error

• Code: 912
• Description: Unrecoverable Engine firmware error POR the machine. If the error re-occurs, then update the firmware. If the error continues occurring, then replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 940
• Description: RIP to engine communication failure-the zero crossing signal used for fuser control in the low voltage (LV) power supply has failed, or the wrong low voltage power supply has been installed.
• Troubleshooting Guides: Step 1 Check if the power supply cable is properly connected to the controller board. Is it properly connected? Go to step 2. Reseat the cables.
  Step 2 1. Turn off the printer. 2. Remove the power cord. 3. Measure the resistance between terminals A and D of the power supply socket. Is the resistance approximately 30 ohms? Contact your next level of support. Replace the power supply. See Power supply removal.

• Code: 948
• Description: Failed engine card-pel clock check failed.
• Troubleshooting Guides: Replace the controller board.

• Code: 949
• Description: Failed engine card-delay line calibration failure.
• Troubleshooting Guides: Replace the controller board.

• Code: 950
• Description: NVRAM mismatch failure-mismatch between controller board EEPROM and control panel mirror. ‘.xx’ codes: • 00-29- mismatch between system and mirror • 30-60-mismatch between secure and system
• Troubleshooting Guides: Step 1 Check the control panel assembly. Was the control panel assembly recently replaced? Go to step 3. Go to step 2.
  Step 2 Check the controller board assembly. Was the controller board assembly recently replaced? Go to step 4. Contact next level of support.
  Step 3 Replace the current control panel assembly with the original control panel assembly. Go to Control panel assembly removal. Does the error remain? Go to step 5. The problem is solved.
  Step 4 Replace the current controller board assembly with the original controller board assembly. Go to Controller board removal. Does the problem continue? Go to step 6. The problem is solved.
  Step 5 Replace the original control panel assembly with a new and not previously installed control panel assembly. Does the error continue? Contact the next level of support. The problem is solved.
  Step 6 Replace the original control panel assembly with a new and not previously installed control panel door assembly. Does the error continue? Contact the next level of support. The problem is solved.

• Code: 952
• Description: A recoverable NVRAM Cyclic Redundancy Check (CRC) error occurred-n is the offset at which the error occurred.
• Troubleshooting Guides: POR the printer. Does the error remain? Contact the next level of support. The problem is solved.

• Code: 953
• Description: NVRAM chip failure with mirror part Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 954
• Description: NVRAM chip failure with system part Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 955
• Description: The Code ROM or NAND flash failed the Cyclic Redundancy Check (CRC) or the NAND experienced an uncorrectable multi-bit failure. Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 956
• Description: RIP card failure-processor failure Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 956.01
• Description: Processor temperature is over the limit. Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 957
• Description: RIP card failure-ASIC failure Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 958
• Description: Controller Board NAND Failure-printer has performed more than 100 shift and reflash operations as a result of ECC bit corrections. Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 959
• Description: 959.01 Controller verification failure of pensive boot code 959.02 Failure to authenticate Signature Verification Code 959.03 Signature Verification Code failed to authenticate a code partition 959.04 Jump to unverified address 959.05 Unknown Boot Failure 959.20 Pensive hardware failure 959.21 Pensive did not respond to command request 959.22 Challenge Secret Failure 959.23 Pensive self test failed during initialization 959.24 EEPROM Retention Error (Write failure) 959.25 Insufficient device space during HW prog 959.26 Incremental counter reset exceeds maximum value 959.27 Increment count failed due to max value limit 959.28 Invalid SP Memory Configuration 959.30 Pensive library flagged an invalid argument(s) 959.31 Pensive library flagged an invalid device address 959.32 Failure to init physical interface 959.33 Unknown/unexpected Error 959.34 System Pensive Bus Busy Error 959.35 Transmission Error 959.36 Pensive command is invalid due to unlocked device status 959.37 Pensive command is invalid due to locked device status 959.38 Incremental counter id(s) are invalid 959.39 Invalid NV address 959.40 Invalid Pensive command
• Troubleshooting Guides: Update the firmware. Note: Contact the next level of support for the correct firmware level. Does the error remain? Replace the controller board. See Controller board removal. The problem is solved.

Solve Konica-Minolta bizhub 4000P Error codes

• Code: 960
• Description: RAM Memory Error-RAM soldered on the card is bad Replace the controller board.
• Troubleshooting Guides: Controller board removal.

• Code: 961
• Description: RAM Memory Error-optional DRAM is bad
• Troubleshooting Guides: Replace the bad memory card. Does the error remain? Contact the next level of support. The problem is solved.

• Code: 964
• Description: Download Emulation Cyclic Redundancy Check (CRC) Error-checksum failure detected in the emulation header or emulation file.
• Troubleshooting Guides: Step 1 Disable the download emulation, and then program the download emulation into the firmware card again. Does the error remain? Go to step 2. The problem is solved. Step 2 Replace the firmware card and download the emulation to the new card. Does the error remain? Contact the next level of support. The problem is solved.

• Code: 975 … 979
• Description: 975.xx Network Error-unrecognizable network port Call the next level of support. 976.xx Network Error-unrecoverable software error in network port Call the next level of support. 978.xx Network Error-bad checksum while programming network port Call the next level of support. 979.xx Network Error-flash parts failed while programming network port Call the next level of support.
• Troubleshooting Guides: Step 1 Check the network cable for proper connection and damage, and replace if necessary. Does the problem remain? Go to step 2. The problem is solved.
  Step 2 Check the controller board network port for proper operation and damage, and replace the controller board if necessary. Does the error remain? Contact the next level of support. The problem is solved.

• Code: 980 … 984
• Description: 980.xx Engine experiencing unreliable communication with the specified device Call the next level of support. 981.xx Engine protocol violation detected by the specified device Call the next level of support. 982.xx Communications error detected by the specified device. Device can be: • Engine, Duplex, Tray x, Env Feeder • Output Bin x (Note: Used for single bin devices) • Bins x to y (Note: Used for multiple bin devices) Call the next level of support. 983.xx Invalid command received by the specified device Call the next level of support. 984.xx Invalid command parameter received by the specified device Call the next level of support.
• Troubleshooting Guides: Step 1 Make sure that the optional hardware is compatible with the printer. Does the problem remain? Go to step 2. The problem is solved. Step 2 Make sure that the firmware of the engine and options are compatible. Are the firmware of the engine and options compatible? Go to step 4. Go to step 3.
  Step 3 Update the firmware. Does the problem remain? Go to step 4. The problem is solved.
  Step 4 Make sure that the interconnect cables are properly seated. Does the problem remain? Go to step 5. The problem is solved.
  Step 5 Make sure that both ends of the interconnect cables are properly connected to the controller board and engine options card. Does the problem remain?
  Step 6 Check the option for damage, and replace if necessary. Does the problem remain?
  Step 7 Check the controller board for damage, and replace if necessary. Does the problem remain?

• Code: 990
• Description: An equipment check condition has occurred in the specified device, but the device is unable to identify the exact component failure- device can be: • Engine, Duplex, Tray x, Env Feeder • Output Bin x (Note: Used for single bin devices) • Bins x to y (Note: Used for multiple bin devices) Call the next level of support.
• Troubleshooting Guides: Step 1 Make sure that the optional hardware is compatible with the printer. Does the problem remain? Go to step 2. The problem is solved. Step 2 Make sure that the firmware of the engine and options are compatible. Are the firmware of the engine and options compatible? Go to step 4. Go to step 3.
  Step 3 Update the firmware. Does the problem remain? Go to step 4. The problem is solved.
  Step 4 Make sure that the interconnect cables are properly seated. Does the problem remain? Go to step 5. The problem is solved.
  Step 5 Make sure that both ends of the interconnect cables are properly connected to the controller board and engine options card. Does the problem remain?
  Step 6 Check the option for damage, and replace if necessary. Does the problem remain?
  Step 7 Check the controller board for damage, and replace if necessary. Does the problem remain?

• Code: 991
• Description: The specified device has detected an equipment check in its controller board-device can be: • Engine, Duplex, Tray x, Env Feeder • Output Bin x (Note: Used for single bin devices) • Bins x to y (Note: Used for multiple bin devices) Call the next level of support.
• Troubleshooting Guides: Step 1 Make sure that the optional hardware is compatible with the printer. Does the problem remain? Go to step 2. The problem is solved. Step 2 Make sure that the firmware of the engine and options are compatible. Are the firmware of the engine and options compatible? Go to step 4. Go to step 3.
  Step 3 Update the firmware. Does the problem remain? Go to step 4. The problem is solved.
  Step 4 Make sure that the interconnect cables are properly seated. Does the problem remain? Go to step 5. The problem is solved.
  Step 5 Make sure that both ends of the interconnect cables are properly connected to the controller board and engine options card. Does the problem remain?
  Step 6 Check the option for damage, and replace if necessary. Does the problem remain?
  Step 7 Check the controller board for damage, and replace if necessary. Does the problem remain?

– Get more error code list with quick guide to fix printer product, click here
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