[SOLVED] Quick fix Konica-Minolta 4020 list error codes

[SOLVED] Quick fix Konica-Minolta 4020 list error codes

– Compatible Printer model: Konica-Minolta bizhub 4020
– Konica-Minolta bizhub 4020 Error Codes with quick guides:

• Code: 111.00
• Description: Pel clock check failed.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.01
• Description: Downlevel ASIC detected.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.31
• Description: Printhead never delivered HSYNCs.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.32
• Description: Printhead lost HSYNCs.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.40
• Description: Wrong printhead installed
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.50
• Description: Open-loop printhead error, open-loop sweep state.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.51
• Description: Open-loop printhead error, open-loop sweep state.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.52
• Description: Open-loop printhead error, check prelim amp state.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.53
• Description: Open-loop printhead error, enable amp Kp state.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.54
• Description: Closed-loop printhead error, amp Kp failed to converge.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.55
• Description: Closed-loop printhead error while waiting for amp Kp to converge.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.56
• Description: Closed-loop printhead error, amp Ki failed to converge.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.57
• Description: Closed-loop printhead error while waiting for amp Ki to converge.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.58
• Description: Closed-loop printhead error, load scan regs state.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.59
• Description: Closed-loop printhead error, forward and reverse capture times differ by too much.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.60
• Description: Closed-loop printhead sweep error, check sweep accuracy state.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.61
• Description: Printhead drive control out of range due to an external event beyond what the control is designed to handle.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.62
• Description: Closed-loop printhead error, off-resonant PI effort state.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.63
• Description: Timed out on POR sweep.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.64
• Description: Attempted to exceed open loop drive limits.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.65
• Description: Attempted to exceed open loop drive limits.
• Troubleshooting Guides:

• Code: 111.66
• Description: Failed alignment of printhead.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.67
• Description: Failed alignment of printhead.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.68
• Description: Too many fake HSYNCs while aligning printhead.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 111.69
• Description: Too many fake HSYNCs while aligning printhead.
• Troubleshooting Guides: Step 1: Check the printhead unit cables JLSU1 and J6 for proper connection. Are they properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Inspect the printhead cables and connectors. Are they free of damage? Yes: Replace the controller board. No: Replace the printhead.

• Code: 121.07
• Description: Fuser has been on for more than allowed after a gap blowout, and the temperature is still too cold.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.08
• Description: Fuser was under temp when page was in fuser.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.20
• Description: Fuser undertemp during steady state control. Can ocurr in printing or standby modes.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.22
• Description: Fuser did not warm enough to start line voltage detection.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.23
• Description: Fuser took too long to heat to line detection temp.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.24
• Description: Fuser never reached detection temperature.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.25
• Description: After line voltage detection, control did not roll over to steady state control in time.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.26
• Description: Failed to reach temperature during warm up.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.28
• Description: Failed to reach EP warm up temperature in time.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.29
• Description: Fuser failed to reach pre-heat temperature for motor start during warm up.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.30
• Description: Fuser failed to reach printing temperature by the time a page reached the fuser.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.31
• Description: Fuser is too hot. Global overtemp check.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.32
• Description: Open fuser main thermistor.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.33
• Description: Open fuser edge thermistor.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.34
• Description: Open fuser backup roll thermistor.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.35
• Description: Attempting to POR after receiving a 121.34.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 121.36
• Description: Fuser did not heat to allow compression jog.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

Solve Konica-Minolta bizhub 4020 Error codes

• Code: 121.37
• Description: Fuser heated faster than allowed during line voltage detection.
• Troubleshooting Guides: Step 1: 1. Restore the engine settings to their defaults: Diagnostics Menu >Printer Setup >Defaults 2. Restore the EP setup settings to their defaults: Diagnostics Menu >EP Setup >Defaults Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: • 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? Yes: Go to step 3. No: Reseat the cables.
  Step 4: 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? Yes: Perform an LVPS service check. No: Replace the fuser.
  Step 5: Check the fuser rollers, belts and gears for damage and debris. Are they free of damage and debris? Yes: Perform a cooling fan service check and LVPS service check. No: Replace the fuser.

• Code: 126.01
• Description: Line frequency outside operating range of device.
• Troubleshooting Guides: 1. Check the power cord for continuity. Replace if necessary. 2. Make sure the nominal voltage source is within specification. 3. If the problem remains:
  Step 1: 1. Check the power cord for continuity. If necessary, replace. 2. Make sure the nominal voltage source is within specification. Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: Check if the power supply cable is properly connected to the controller board. Is it properly connected? Yes: Go to step 3. No: Reseat the cables. Step 3 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? Yes: Contact your next level of support. No: Replace the power supply.

• Code: 126.02
• Description: No line frequency detected.
• Troubleshooting Guides: 1. Check the power cord for continuity. Replace if necessary. 2. Make sure the nominal voltage source is within specification. 3. If the problem remains:
  Step 1: 1. Check the power cord for continuity. If necessary, replace. 2. Make sure the nominal voltage source is within specification. Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: Check if the power supply cable is properly connected to the controller board. Is it properly connected? Yes: Go to step 3. No: Reseat the cables. Step 3 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? Yes: Contact your next level of support. No: Replace the power supply.

• Code: 132.01
• Description: TDS baseline too low.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.02
• Description: TDS baseline too high.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.03
• Description: TDS baseline excessive range.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.16
• Description: TDS calibration at maximum.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.17
• Description: TDS calibration too low.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.18
• Description: TDS calibration too close to baseline.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.32
• Description: PC drum measurement too high.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.33
• Description: PC drum measurement too different from calibration.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 132.34
• Description: PC drum measurement too close to baseline.
• Troubleshooting Guides: Step 1: Remove the transfer roll, and then check for loose toner blocking the toner density sensor. Is it free of loose toner? Yes: Go to step 2. No: Clean the sensor.
  Step 2: Check the TDS for proper operation: 1. Lower the ACM assembly. 2. Move the toner density sensor wiper from left to right. Does it move freely? Yes: Go to step 3. No: Reinstall the wiper properly. If it still cannot move freely, then replace the toner density sensor.
  Step 3: Check the cable JTDS for proper connection. Is it properly connected? Yes: Go to step 4. No: Reseat the cable.
  Step 4: Check the cable JTDS for damage and pinch points. Is it free of damage? Yes: Replace the controller board. No: Replace the toner density sensor.

• Code: 133.05
• Description: CTLS reading above maximum expected value.
• Troubleshooting Guides: Step 1: Check for loose toner blocking the CTLS. Is it free of any loose toner? Yes: Go to step 2. No: 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. Yes: Go to step 3. Reseat the cables.
  Step 3 Check the cable PCN3 and CTLS cable for damage. Are they free of damage? Yes: Replace the controller board. No: Replace the printer.

• Code: 133.06
• Description: CTLS reading below minimum expected value.
• Troubleshooting Guides: Step 1: Check for loose toner blocking the CTLS. Is it free of any loose toner? Yes: Go to step 2. No: 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. Yes: Go to step 3. Reseat the cables.
  Step 3 Check the cable PCN3 and CTLS cable for damage. Are they free of damage? Yes: Replace the controller board. No: Replace the printer.

• Code: 133.08
• Description: Excessive CTLS noise.
• Troubleshooting Guides: Step 1: Check for loose toner blocking the CTLS. Is it free of any loose toner? Yes: Go to step 2. No: 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. Yes: Go to step 3. Reseat the cables.
  Step 3 Check the cable PCN3 and CTLS cable for damage. Are they free of damage? Yes: Replace the controller board. No: Replace the printer.

• Code: 140.10
• Description: Transport motor halls not detected.
• Troubleshooting Guides: Step 1: Remove the main drive gearbox and check for any debris. Is it free of debris? Yes: Go to step 2. No: Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Yes: Go to step 3. No: Replace the main drive gearbox.
  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? Yes: Replace the controller board. No: Replace the main drive gearbox.

• Code: 140.20
• Description: Transport motor took too long to stop.
• Troubleshooting Guides: Step 1: Remove the main drive gearbox and check for any debris. Is it free of debris? Yes: Go to step 2. No: Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Yes: Go to step 3. No: Replace the main drive gearbox.
  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? Yes: Replace the controller board. No: Replace the main drive gearbox.

• Code: 140.30
• Description: Transport motor unable to lock (before motor ID).
• Troubleshooting Guides: Step 1: Remove the main drive gearbox and check for any debris. Is it free of debris? Yes: Go to step 2. No: Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Yes: Go to step 3. No: Replace the main drive gearbox.
  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? Yes: Replace the controller board. No: Replace the main drive gearbox.

• Code: 140.40
• Description: Transport motor overspeed detected.
• Troubleshooting Guides: Step 1: Remove the main drive gearbox and check for any debris. Is it free of debris? Yes: Go to step 2. No: Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Yes: Go to step 3. No: Replace the main drive gearbox.
  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? Yes: Replace the controller board. No: Replace the main drive gearbox.

• Code: 140.60
• Description: Transport motor unable to lock (after motor ID).
• Troubleshooting Guides: Step 1: Remove the main drive gearbox and check for any debris. Is it free of debris? Yes: Go to step 2. No: Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Yes: Go to step 3. No: Replace the main drive gearbox.
  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? Yes: Replace the controller board. No: Replace the main drive gearbox.

• Code: 140.70
• Description: Transport motor out of lock detected.
• Troubleshooting Guides: Step 1: Remove the main drive gearbox and check for any debris. Is it free of debris? Yes: Go to step 2. No: Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Yes: Go to step 3. No: Replace the main drive gearbox.
  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? Yes: Replace the controller board. No: Replace the main drive gearbox.

• Code: 140.80
• Description: Transport motor excessive PWM or overtemp.
• Troubleshooting Guides: Step 1: Remove the main drive gearbox and check for any debris. Is it free of debris? Yes: Go to step 2. No: Remove the debris.
  Step 2 Check the gears of main drive gearbox for wear or damage. Are they free of wear or damage? Yes: Go to step 3. No: Replace the main drive gearbox.
  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? Yes: Replace the controller board. No: Replace the main drive gearbox.

• Code: 146.00
• Description: Autocomp 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? Yes: Go to step 2. No: 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? Yes: Go to step 3. No: Replace the pick/lift motor gearbox.
  Step 3: Check the cable JLIFT1 on the controller board. Is it properly connected and free of damage? Yes: Go to step 4. No: Replace the pick/lift motor gearbox.
  Step 4: Replace the controller board. Does this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 155.00
• Description: No encoder received from auger motor.
• Troubleshooting Guides: Step 1: Is the button aligned with the front of the toner cartridge? Yes: Go to step 2. No: Go to step 3.
  Step 2: Check the gear on the toner cartridge for wear or damage. Is it free of wear or damage? Yes: Go to step 5. No: The problem is solved.
  Step 3: Remove, and then reinstall the toner cartridge. Make sure that it is properly seated.. Is it button in the correct position? Yes: Go to step 4. No: Go to step 5.
  Step 4: Run a print test. Does the problem remain? Yes: Go to step 5. No: The problem is solved.
  Step 5: Replace the toner cartridge Does the problem remain? Yes: Go to step 6. No: 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? Yes: Go to step 7. No: Replace the cartridge gearbox.
  Step 7: Check the cartridge gearbox cable for proper connection to the controller board. Is it properly connected? Yes: Go to step 8. No: Reseat the cable.
  Step 8: Check the cartridge gearbox cable for damage. Is it free of damage? Yes: Replace the controller board. No: Replace the cartridge gearbox.

• Code: 171.03 … 171.07
• Description: 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? Yes: Go to step 2. No: Replace the cooling fan.
  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? Yes: Go to step 3. No: Replace the controller board.
  Step 3: Is the fan idle? Yes: Replace the cooling fan. No: The problem is solved.

• Code: 321.51
• Description: ACM motor no first encoder
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 321.52
• Description: ACM motor stop error
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 321.53
• Description: ACM PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 322.54
• Description: Separator/Pass-through motor no first encoder
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 322.55
• Description: Separator/Pass-through motor stop error
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 322.56
• Description: Separator/Pass-through motor PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 324.57
• Description: ACM motor no first encoder
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 324.58
• Description: ACM motor stop error
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 324.59
• Description: ACM motor PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 325.60
• Description: Hardware error – Board ID unknown
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 325.61
• Description: Hardware error – Option type unknown
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 325.62
• Description: Hardware error – Product ID unknown
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 325.63
• Description: Hardware error – Sensors are not plugged on the board.
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 331.51
• Description: ACM motor no first encoder
• Troubleshooting Guides: Step 1: 6. Remove the option tray insert. 7. 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? Yes: Go to step 2. No: Replace the tray insert.
  Step 2: Check the ACM motor for the following: • Gear tooth breakage • Freedom of rotation Is it free of wear or damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the cable J11 on the option tray controller board. Is it properly connected and free of damage? Yes: Contact the next level of support. No: Replace the tray.

• Code: 331.52
• Description: ACM motor stop error
• Troubleshooting Guides: Step 1: 6. Remove the option tray insert. 7. 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? Yes: Go to step 2. No: Replace the tray insert.
  Step 2: Check the ACM motor for the following: • Gear tooth breakage • Freedom of rotation Is it free of wear or damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the cable J11 on the option tray controller board. Is it properly connected and free of damage? Yes: Contact the next level of support. No: Replace the tray.

• Code: 331.53
• Description: ACM motor PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: 6. Remove the option tray insert. 7. 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? Yes: Go to step 2. No: Replace the tray insert.
  Step 2: Check the ACM motor for the following: • Gear tooth breakage • Freedom of rotation Is it free of wear or damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the cable J11 on the option tray controller board. Is it properly connected and free of damage? Yes: Contact the next level of support. No: Replace the tray.

• Code: 332.54
• Description: Separator/Pass-through motor Motor no first encoder
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 332.55
• Description: Separator/Pass-through motor motor stop error
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 332.56
• Description: Separator/Pass-through motor PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 334.57
• Description: ACM motor no first encoder
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 334.58
• Description: ACM motor stop error
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 334.59
• Description: ACM PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 335.60
• Description: Hardware error – Board ID unknown
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 335.61
• Description: Hardware error – Option type unknown
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 335.62
• Description: Hardware error – Product ID unknown
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 335.63
• Description: Hardware error – Sensors are not plugged on the board.
• Troubleshooting Guides: Step 1: Check all connections to the option tray controller board. Are the properly connected? Yes: Go to step 2. No: Reseat the cables.
  Step 2: Check printer’s firmware level. Is it up to date? Yes: Go to step 3. No: Update the firmware.
  Step 3: Replace the option tray. Does the error remain? Yes: Contact the next level of support. No: The problem is solved.

• Code: 341.51
• Description: ACM motor no first encoder
• Troubleshooting Guides: Step 1: 6. Remove the option tray insert. 7. 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? Yes: Go to step 2. No: Replace the tray insert.
  Step 2: Check the ACM motor for the following: • Gear tooth breakage • Freedom of rotation Is it free of wear or damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the cable J11 on the option tray controller board. Is it properly connected and free of damage? Yes: Contact the next level of support. No: Replace the tray.

• Code: 341.52
• Description: ACM motor stop error
• Troubleshooting Guides: Step 1: 6. Remove the option tray insert. 7. 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? Yes: Go to step 2. No: Replace the tray insert.
  Step 2: Check the ACM motor for the following: • Gear tooth breakage • Freedom of rotation Is it free of wear or damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the cable J11 on the option tray controller board. Is it properly connected and free of damage? Yes: Contact the next level of support. No: Replace the tray.

• Code: 341.53
• Description: ACM motor PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: 6. Remove the option tray insert. 7. 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? Yes: Go to step 2. No: Replace the tray insert.
  Step 2: Check the ACM motor for the following: • Gear tooth breakage • Freedom of rotation Is it free of wear or damage? Yes: Go to step 3. No: Replace the tray.
  Step 3: Check the cable J11 on the option tray controller board. Is it properly connected and free of damage? Yes: Contact the next level of support. No: Replace the tray.

• Code: 342.54
• Description: Separator/pass-through motor no first encoder
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3 Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 342.55
• Description: Separator/pass-through motor stop error
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3 Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 342.56
• Description: Separator/pass-through motor PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: 8. Remove the option tray insert. 9. Check the separator roll assembly gear under the tray base for the following: – Gear tooth breakage – Freedom of rotation Does it move freely, and is it free of wear or damage? Yes: Go to step 2. No: Replace the tray.
  Step 2: Check the cable J10 on the option tray controller board. Is it properly connected and free of damage? Yes: Go to step 3. No: Replace the tray.
  Step 3 Check the separator roll assembly for wear or damage. Is it free of wear or damage? Yes: Contact the next level of support. No: Replace the separator roll assembly.

• Code: 344.57
• Description: ACM motor no first encoder
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 344.58
• Description: ACM motor stop error
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 344.59
• Description: ACM motor PWM underflow (motor overspeed)
• Troubleshooting Guides: Step 1: Check the cable J11 on the option tray controller board. Is it properly connected? Yes: Go to step 2. No: Reseat the cable.
  Step 2: 10. Remove the option tray insert and bypass the tray present sensor. 11. POR into the Diagnostics Menu and perform a feed test: Diagnostics Menu >Feed Test > choose an option tray 12. Check the ACM for proper operation. Does the ACM freely rotate three times before displaying a jam message? Yes: Go to step 3. No: Replace the ACM assembly.
  Step 3: Is the ACM gear free of wear or damage? Yes: Contact the next level of support. No: Replace the ACM assembly.

• Code: 840.01
• Description: The scanner is disabled and can’t be used.
• Troubleshooting Guides: Step 1: 1. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 2. POR the MFP to operating mode. Try running a copy from the ADF and flatbed. Did the 840.xx error reoccur? Yes: Go to step 2. No: The problem is solved.
  Step 2: Re-enter the Configuration mode, and then scroll to and select the Disable Scanner menu item. Does the screen display ADF disabled or Auto Disabled? Yes: Go to step 3. No: Go to step 8.
  Step 3: Check the ADF cable connections on the ADF relay board and connector JADF1 on the controller board. Also inspect the cable connections JHOME1, JFBM1, JPLEN1, and JCIS1 on the controller board. Are the connections properly connected? Yes: Go to step 5. No: Go to step 4.
  Step 4: 1. Properly connect the connections on the ADF relay board and controller board. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module and then save the setting. 3. POR the MFP to operating mode. Try running a copy from the ADF and the flatbed. Did the 840.xx error reoccur? Yes: Go to step 5. No: The problem is solved.
  Step 5: Check the continuity on the ADF cable. Is there continuity? Yes: Go to step 7. No: Go to step 6.
  Step 6: 1. Replace the ADF cable. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 3. POR the MFP to operating mode. Try running a copy from the ADF and flatbed. Did the 840.xx error reoccur? Yes: Go to step 7. No: The problem is solved.
  Step 7: 1. Replace the ADF unit. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module and then save the setting. 3. POR the MFP to operating mode. Run a copy from the flatbed. Did the 840.xx error reoccur? Yes: Go to step 8. No: The problem is solved.
  Step 8: Inspect JFBM1, JHOME1 and JCIS1 on the controller board. Are they properly connected? Yes: Go to step 10. No: Go to step 9.
  Step 9: Properly connect all the connections. Did the 840.xx error reoccur? Yes: The problem is solved. No: Go to step 10.
  Step 10: 1. Replace the flatbed unit. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 3. POR the MFP to operating mode. Run a copy from the flatbed. Did the 840.xx error reoccur? Yes: Go to step 11. No: The problem is solved.
  Step 11: Replace the controller board. Yes: The problem is solved. No: Contact second-level support.

• Code: 840.02
• Description: The scanner is disabled and can’t be used. This message is posted when the MFP PORs. Enter the configuration menu, and reenable the scanner module.
• Troubleshooting Guides: Step 1: 1. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 2. POR the MFP to operating mode. Try running a copy from the ADF and flatbed. Did the 840.xx error reoccur? Yes: Go to step 2. No: The problem is solved.
  Step 2: Re-enter the Configuration mode, and then scroll to and select the Disable Scanner menu item. Does the screen display ADF disabled or Auto Disabled? Yes: Go to step 3. No: Go to step 8.
  Step 3: Check the ADF cable connections on the ADF relay board and connector JADF1 on the controller board. Also inspect the cable connections JHOME1, JFBM1, JPLEN1, and JCIS1 on the controller board. Are the connections properly connected? Yes: Go to step 5. No: Go to step 4.
  Step 4: 1. Properly connect the connections on the ADF relay board and controller board. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module and then save the setting. 3. POR the MFP to operating mode. Try running a copy from the ADF and the flatbed. Did the 840.xx error reoccur? Yes: Go to step 5. No: The problem is solved.
  Step 5: Check the continuity on the ADF cable. Is there continuity? Yes: Go to step 7. No: Go to step 6.
  Step 6: 1. Replace the ADF cable. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 3. POR the MFP to operating mode. Try running a copy from the ADF and flatbed. Did the 840.xx error reoccur? Yes: Go to step 7. No: The problem is solved.
  Step 7: 1. Replace the ADF unit. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module and then save the setting. 3. POR the MFP to operating mode. Run a copy from the flatbed. Did the 840.xx error reoccur? Yes: Go to step 8. No: The problem is solved.
  Step 8: Inspect JFBM1, JHOME1 and JCIS1 on the controller board. Are they properly connected? Yes: Go to step 10. No: Go to step 9.
  Step 9: Properly connect all the connections. Did the 840.xx error reoccur? Yes: The problem is solved. No: Go to step 10.
  Step 10: 1. Replace the flatbed unit. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 3. POR the MFP to operating mode. Run a copy from the flatbed. Did the 840.xx error reoccur? Yes: Go to step 11. No: The problem is solved.
  Step 11: Replace the controller board. Yes: The problem is solved. No: Contact second-level support.

• Code: 840.03
• Description: The scanner is disabled and can’t be used. This message is posted when the MFP PORs. Enter the configuration menu, and reenable the scanner module.
• Troubleshooting Guides: Step 1: 1. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 2. POR the MFP to operating mode. Try running a copy from the ADF and flatbed. Did the 840.xx error reoccur? Yes: Go to step 2. No: The problem is solved.
  Step 2: Re-enter the Configuration mode, and then scroll to and select the Disable Scanner menu item. Does the screen display ADF disabled or Auto Disabled? Yes: Go to step 3. No: Go to step 8.
  Step 3: Check the ADF cable connections on the ADF relay board and connector JADF1 on the controller board. Also inspect the cable connections JHOME1, JFBM1, JPLEN1, and JCIS1 on the controller board. Are the connections properly connected? Yes: Go to step 5. No: Go to step 4.
  Step 4: 1. Properly connect the connections on the ADF relay board and controller board. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module and then save the setting. 3. POR the MFP to operating mode. Try running a copy from the ADF and the flatbed. Did the 840.xx error reoccur? Yes: Go to step 5. No: The problem is solved.
  Step 5: Check the continuity on the ADF cable. Is there continuity? Yes: Go to step 7. No: Go to step 6.
  Step 6: 1. Replace the ADF cable. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 3. POR the MFP to operating mode. Try running a copy from the ADF and flatbed. Did the 840.xx error reoccur? Yes: Go to step 7. No: The problem is solved.
  Step 7: 1. Replace the ADF unit. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module and then save the setting. 3. POR the MFP to operating mode. Run a copy from the flatbed. Did the 840.xx error reoccur? Yes: Go to step 8. No: The problem is solved.
  Step 8: Inspect JFBM1, JHOME1 and JCIS1 on the controller board. Are they properly connected? Yes: Go to step 10. No: Go to step 9.
  Step 9: Properly connect all the connections. Did the 840.xx error reoccur? Yes: The problem is solved. No: Go to step 10.
  Step 10: 1. Replace the flatbed unit. 2. POR the machine into Configuration menu >Disable Scanner. From there, select Enabled to change the setting to re-enable the scanner module, and then save the setting. 3. POR the MFP to operating mode. Run a copy from the flatbed. Did the 840.xx error reoccur? Yes: Go to step 11. No: The problem is solved.
  Step 11: Replace the controller board. Yes: The problem is solved. No: Contact second-level support.

• Code: 841.xx
• Description: Scanner failure – front side image processing ASIC. Invalid configuration or ASIC not found?
• Troubleshooting Guides: Step 1: Restart the device, and then retry the scan / copy job. Repeat this step with a few copy jobs. Does the error return? Yes: Go to step 2. No: No issue.
  Step 2: Is the CCD ribbon cable properly connected to JCIS1 on the controller board? Yes: Go to step 3. No: Properly connect cable to JCIS1.
  Step 3: Replace the flatbed unit. Did this resolve the issue? Yes: The problem is solved. No: Replace the controller board.

• Code: 842.xx
• Description: Scanner failure – communications
• Troubleshooting Guides: Step 1: Restart the device, and then retry the scan / copy job. Repeat this step with a few copy jobs. Does the error return? Yes: Go to step 2. No: No issue.
  Step 2: Is the CCD ribbon cable properly connected to JCIS1 on the controller board? Yes: Go to step 3. No: Properly connect cable to JCIS1.
  Step 3: Replace the flatbed unit. Did this resolve the issue? Yes: The problem is solved. No: Replace the controller board.

• Code: 843.00
• Description: Scanner Failure – carriage failed to Home or move to desired position
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.01
• Description: ADF mechanical failure
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.02
• Description: Generic Mechanical failure detected
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.03
• Description: Pick Roller Engage Failure
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.04
• Description: Pick Roller Disengage Failure
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.05
• Description: Carriage overun
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.06
• Description: ADF nudger
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 843.99
• Description: Scanner complete timeout error
• Troubleshooting Guides: Step 1: Check all cables connecting the ADF and flatbed to the controller board. Are they properly connected? Yes: Go to step 3. No: Go to step 2.
  Step 2: Re-connect the cables to the controller board. Did this fix the problem? Yes: The problem is solved. No: Go to step 3.
  Step 3: 1. Enter diagnostics mode and navigate to: SCANNER TESTS >Sensor Test Perform the scanner sensor tests. 2. Navigate to: SCANNER TESTS >Motor Tests Perform the scanner sensor and motor tests. Did any test fail? Yes: Go to step 4. No: Go to step 8.
  Step 4: Did the Flatbed Home Sensor test or Flatbed motor test fail? Yes: Go step 5. No: Go to step 6.
  Step 5: Replace the flatbed. Did this solve the problem? Yes: The problem is solved. No: Go to step 6.
  Step 6: Did the ADF pick motor or feed motor tests fail? Yes: Go to step 7. No: Go to step 8.
  Step 7: Replace the ADF. Did this fix the problem? Yes: The problem is solved. No: Go to step 8.
  Step 8: Replace the controller board. Did this fix the problem? Yes: The problem is solved. No: Contact the next level of support.

• Code: 849.01
• Description: Configuration error – the device had modem installed, but configID indicates it should not.
• Troubleshooting Guides: Contact the next level of support. They will give the instructions on how to resolve the error.

• Code: 849.10
• Description: Configuration error – the device had HD installed, but configID indicates it should not.
• Troubleshooting Guides: Contact the next level of support. They will give the instructions on how to resolve the error.

• Code: 900.xx
• Description: Controller firmware errors
• Troubleshooting Guides:

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

• Code: 940.xx
• Description: Controller 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: 1. Check the power cord for continuity. If necessary, replace. 2. Make sure the nominal voltage source is within specification. Does the problem remain? Yes: Go to step 2. No: The problem is solved.
  Step 2: Check if the power supply cable is properly connected to the controller board. Is it properly connected? Yes: Go to step 3. No: Reseat the cables.
  Step 3: 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? Yes: Contact your next level of support. No: Replace the power supply.

• Code: 948.xx
• Description: Failed controller board – pel clock check failed. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 949.xx
• Description: Failed controller board – delay line calibration failure.
• Troubleshooting Guides: Replace the controller board

• Code: 950.xx
• 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:

• Code: 952.xx
• Description: A recoverable NVRAM Cyclic Redundancy Check (CRC) error occurred – n is the offset at which the error occurred.
• Troubleshooting Guides:

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

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

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

• Code: 956.01
• Description: Processor Overtemp. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 956.xx
• Description: Controller board failure – processor failure. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 957.xx
• Description: Controller board failure – ASIC failure. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 958.xx
• 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: Replace the controller board

• Code: 959.01
• Description: Controller verification failure of pensive boot code. Upgrade firmware. If that fails, replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.02
• Description: Failure to authenticate Signature Verification Code. Upgrade firmware. If that fails, replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.03
• Description: Signature Verification Code failed to authenticate a code partition. Upgrade firmware. If that fails, replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.04
• Description: Jump to unverified address. Upgrade firmware. If that fails, replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.05
• Description: Unknown Boot Failure. Upgrade firmware. If that fails, replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.20
• Description: Pensive hardware failure. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.21
• Description: Pensive did not respond to command request. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.22
• Description: Challenge Secret Failure. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.23
• Description: Pensive self test failed during initialization. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.24
• Description: EEPROM Retention Error (Write failure). Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.25
• Description: Insufficient device space during HW prog. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.26
• Description: Incremental counter reset exceeds maximum value. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.27
• Description: Increment count failed due to max value limit. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.28
• Description: Invalid SP Memory Configuration. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.30
• Description: Pensive library flagged an invalid argument(s). Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.31
• Description: Pensive library flagged an invalid device address. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.32
• Description: Failure to init physical interface. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.33
• Description: Unknown/unexpected Error. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.34
• Description: System Pensive Bus Busy Error. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.35
• Description: Transmission Error. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.36
• Description: Pensive command is invalid due to unlocked device status. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.37
• Description: Pensive command is invalid due to locked device status. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.38
• Description: Incremental counter id(s) are invalid. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.39
• Description: Invalid NV address. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

• Code: 959.40
• Description: Invalid Pensive command. Replace the controller board.
• Troubleshooting Guides: Replace the controller board

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

• Code: 961.xx
• Description: RAM Memory Error – optional DRAM is bad
• Troubleshooting Guides:

• Code: 964.xx
• Description: Download Emulation Cyclic Redundancy Check (CRC) Error – checksum failure detected in the emulation header or emulation file.
• Troubleshooting Guides:

• Code: 975.xx
• Description: Network Error – unrecognizable network port
• Troubleshooting Guides: Call the next level of support.

• Code: 976.xx
• Description: Network Error – unrecoverable software error in network port
• Troubleshooting Guides: Call the next level of support.

• Code: 978.xx
• Description: Network Error – bad checksum while programming network port
• Troubleshooting Guides: Call the next level of support.

• Code: 979.xx
• Description: Network Error – flash parts failed while programming network port
• Troubleshooting Guides: Call the next level of support.

• Code: 980.xx
• Description: Engine experiencing unreliable communication with the specified device
• Troubleshooting Guides: Call the next level of support.

• Code: 981.xx
• Description: Engine protocol violation detected by the specified device
• Troubleshooting Guides: Call the next level of support.

• Code: 982.xx
• Description: 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)
• Troubleshooting Guides: Call the next level of support.

• Code: 983.xx
• Description: Invalid command received by the specified device
• Troubleshooting Guides: Call the next level of support.

• Code: 984.xx
• Description: Invalid command parameter received by the specified device
• Troubleshooting Guides: Call the next level of support.

• Code: 990.xx
• Description: An equipment check condition has occurred in the specified device, but the device is unable to identify the exact component failure?Xdevice 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)
• Troubleshooting Guides: Call the next level of support.

• Code: 991.xx
• Description: The specified device has detected an equipment check in its controller board?Xdevice 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)
• Troubleshooting Guides: Call the next level of support.

– Get more error code list with quick guide to fix printer product, click here
– About get help with reseting Epson inkpad or others, click here






– Get more information about Epson XP 15000 troubleshooting, click here
– Buy cheap key of Epson WIC Reset Tool, CLICK HERE
– Key Epson Adjustment Program, CLICK HERE
– Download Epson printer driver, CLICK HERE
– Download Epson XP-6100 Driver, Firmware and Manuals, CLICK HERE

Contact us to get support with Konica-Minolta bizhub 4020 Error case

Telegram: https://t.me/hyperaktiv
Facebook: https://www.facebook.com/dngnm/
Or click here to get more ways.