Troubleshooting Error Code C-9401 for Konica Minolta C266i/286i Copiers and Scanners

Konica Minolta copiers and scanners, including the C266i and C286i models, are well-regarded for their reliability and high-quality output. However, like all sophisticated machines, they can occasionally encounter errors. One common issue users may face is the error code C-9401. This blog post will guide you through understanding, diagnosing, and resolving this error to get your device back to optimal performance.

Understanding Error Code C-9401

Error code C-9401 typically indicates a problem with the scanner or copier's internal components, often related to the image processing system. This error can halt operations, affecting both copying and scanning functions. Addressing it promptly ensures minimal downtime and maintains the efficiency of your office workflows.

Fault phenomenon

Printing is normal, copying and scanning report fault code C-9401, enter maintenance mode, and there is a warning code S-1.

 

Solution:

1. Check the maintenance manual for instructions on C-9401 and S-1:

Fault type	C9401: CIS LED lighting failure (front side) C9402: CIS LED lighting abnormality (front side)
Level	B
Fault detection condition	C9401: During C1S gain adjustment, the machine detected that the output of CIS LED was lower than the specified value C9402: At the end of the scanning operation, when the scanner is in the standby position, the average output value of CIS LED is a predetermined value or higher.
Fault isolation	Scanner
Related electrical parts	Flat cable CIS module (CIS) CPU circuit board (CPUB) Base board (BASEB)

Steps:

1. Check whether the connector between CIS-BASEB CN2 is correctly connected. And repair if necessary. Check whether CPUB is correctly installed and correct if necessary.
2. Replace the flat cable.
3. Replace the CIS module (CIS)
4. Replace the CPU board (CPUB)
5. Replace the base board (BASEB)

 

S-1

Functional anomaly type	CCD gain adjustment failure
Functional anomaly code	S-1
Functional anomaly detection sequence	The machine detected an error in the CCD clamp gain adjustment value.
Related parts	CIS module (CIS) Baseboard (BASEB)

 

Steps：

1. If there is a problem with the wiring harness connection between CIS-BASEB CN2, correct it.
2. Check for external light and repair if necessary
3. Replace the CIS module (CIS)
4. Replace the baseboard (BASEB)

2. According to the meaning of the code, they all point to the flat cable, CIS module and mainboard. According to the maintenance idea of ​​soft first and hard later, the fault was reset first, but the fault was not solved. Then the error clearing in the maintenance mode-system 1-initialization was performed, but the fault was not solved.

3. Re-plug the flat cable between the CIS and the baseboard, but the fault was not solved.

4. Replace the CIS module, and the first copy is normal. The fault code C-FC0D appears when copying again.

 

5. Check the maintenance manual for the meaning of the C-FC## code.

Fault type	CFC##: Abort Code
Level	C
Fault detection condition	When executing a process (program) on the firmware that controls the MFP controller, a failure is detected when an abnormality occurs in the control sequence. In most cases, a failure occurs when an abnormality occurs in the control sequence under certain conditions and at a certain time.
Fault isolation
Related electrical parts

Steps:
1. Perform [Soid-diog(Full)](Self-diagnosis (Full)).
For details, see "L4.. Troubleshooting using Self-diagnosis (Full)".
2. If the diagnosis result of [Soid-diog(Full)](Self-diagnosis (Full)) is OK. Since there is no hardware component-related failure, retrieve the "Machine Managenment List" and send a query and related information to KM.

6. Reset the fault and clear the error again, but the fault was not resolved.

7. After replacing the flat cable from the CIS (scanning light holder) to the mainboard, the machine can be repaired and used normally.

Reset the Machine to Factory Settings

If the error persists, consider resetting the machine to its factory settings:

1. Access the Service Mode: Press the menu button and navigate to the “Utility” or “Administrator Settings” menu.
2. Enter Service Mode: Use the appropriate key combination to enter the service mode (refer to the user manual for specific steps).
3. Select Factory Reset: Choose the option to reset the machine to factory settings. Note that this will erase all custom settings, so back up any important configurations first.

Consult a Professional Technician

If none of the above steps resolves the error, it may indicate a more serious hardware issue. Contacting a professional technician or Konica Minolta support is advisable:

• Konica Minolta Support: Reach out to their support team for expert assistance.
• Authorized Technicians: If the device is under warranty, an authorized technician can perform in-depth diagnostics and repairs.

Preventive Measures

To avoid encountering error C-9401 in the future, consider these preventive measures:

• Regular Maintenance: Perform regular maintenance checks and cleanings as outlined in the user manual.
• Timely Updates: Keep the firmware up to date to ensure the machine operates with the latest improvements and fixes.
• Proper Handling: Handle the machine carefully, avoiding any physical impacts that could damage internal components.

Conclusion

Error code C-9401 on Konica Minolta C266i/286i copiers and scanners can disrupt your office workflow, but with the right approach, it can be resolved effectively. By following the steps outlined in this guide, you can diagnose and fix the issue, ensuring your machine continues to operate smoothly.

Remember, for consistent and high-quality performance, always use premium consumables like Evate Toner. If you have further questions or need professional assistance, don’t hesitate to contact us or consult Konica Minolta support.