Konica-Minolta bizhub 4752

List of the error display

• When an abnormality occurs in the imaging unit or the toner cartridge, an error message is displayed with an error code.
• Confirm the displayed error message and take an appropriate action.

Error message	Sub message	Error code
Imaging Unit Installation Error	Install imaging unit and close all doors.	031.60#
Incorrect Toner Cartridge setup	Set the toner cartridge and close all doors.	031.40z
Imaging Unit Detection Error	Incorrect imaging unit detected. Install the correct imaging unit and close all doors.	041.## 042.##
Toner Cartridge Detection Error	Incorrect toner cartridge is installed. Set the correct toner cartridge and close all doors.	041.## 042.##

Imaging unit installation error

Step	Action	Yes	No
1	Check if the imaging unit is a supported and genuine Konica Minolta supply. If not, then replace it. Make sure that the imaging unit is properly installed.	Go to step 2.	The problem is solved.
2	Check the imaging unit contacts and spring for proper installation or damage. Are the contacts and spring properly installed and damaged?	Go to step 3.	Go to step 5.
3	Check if the imaging unit contacts and spring are beyond repair. Are the contacts and spring beyond repair?	Contact KM.	Go to step 4.
4	Straighten the imaging unit contacts and install the spring properly. Does the problem remain?	Go to step 5.	The problem is solved.
5	Clean the Toner level sensor. Does the problem remain?	Go to step 6.	The problem is solved.
6	Check the cable PCN3 for proper connection to the power supply. Check the toner level sensor cable for proper connection to the MFP board. Are they properly connected?	Go to step 7.	Reseat the cables.
7	Check the cable PCN3 and toner level sensor cable for damage. Are they free of damage?	Replace the MFP board.	If the left actions do not solve the problem, contact KM.

Incorrect Toner Cartridge setup

Step	Action	Yes	No
1	Check if the toner cartridge is a supported and genuine Konica Minolta supply. If not, then replace it. Make sure that the toner cartridge is properly installed. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary.	Go to step 2.	The problem is solved.
2	Check the cable JDRC2 for proper connection to the MFP board. Is it properly connected?	Go to step 3.	Reseat the cable.
3	Check the toner cartridge smart chip contact for damaged pins. Is it free of damage?	Replace the MFP board.	Replace the toner cartridge smart chip contact.

Imaging Unit Detection Error

Step	Action	Yes	No
1	Make sure that the printer and imaging unit belong to the same country or region. Check if the imaging unit is a supported and genuine Konica Minolta supply. If not, then replace it. Make sure that the imaging unit is properly installed. Does the problem remain?	If the left actions do not solve the problem, contact KM.	The problem is solved.

Toner Cartridge Detection Error

Step	Action	Yes	No
1	Make sure that the printer and toner cartridge belong to the same country or region. Check if the toner cartridge is a supported and genuine Konica Minolta supply. If not, then replace it. Make sure that the toner cartridge is properly installed. Check the toner cartridge, toner cartridge button, and cartridge plunger for damage. Replace if necessary. Does the problem remain?	If the left actions do not solve the problem, contact KM.	The problem is solved.