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OKI Pro9431 error codes

Complete Guide to All OKI Printer Service Error Codes

OKI printers are trusted for their high-quality performance, but occasionally, they may display service error codes indicating issues that require attention. This guide provides a detailed breakdown of OKI printer service codes, their meanings, and step-by-step troubleshooting solutions to keep your printer operating smoothly.


What Are OKI Service Error Codes?

Service error codes, often displayed as “Service Call” errors, are diagnostic messages that alert users to specific hardware or software issues within the printer. These codes can help pinpoint the problem, making troubleshooting faster and more effective.


Categories of OKI Service Error Codes

1. Fatal Error Codes (Critical Issues)

Fatal errors indicate serious malfunctions and often require professional repair.

Error Code Description Solution
001 Machine Check Exception (PCB failure). Restart the printer. Replace the Printer Control PCB if unresolved.
020 Firmware checksum error. Update or reinstall the firmware. Replace the Printer Control PCB if needed.
135 Motor lock error (fuser, belt motor). Inspect and reseat the motor. Replace the motor or motor PCB if necessary.
900 System initialization error. Power cycle the printer. Reinstall firmware or replace the Printer Control PCB if unresolved.

2. Consumable Service Codes

These codes relate to toner cartridges, drums, fuser units, and transfer belts.

Error Code Description Solution
582 Fuser unit installation error. Check that the fuser unit is securely installed. Replace it if damaged.
680 Image drum end-of-life. Replace the drum unit with a genuine OKI drum.
689 Transfer belt unit not detected. Reinstall the transfer belt unit and clean the connectors.
698 Non-recommended fuser unit detected. Replace with a compatible OKI-approved fuser unit.

3. Paper Jam Error Codes

Paper jam errors are common but usually straightforward to fix.

Error Code Description Solution
300 Paper jam in the feeder. Open the feeder tray and carefully remove the jammed paper.
310 Paper jam in the fuser unit. Open the rear cover and gently clear the jam. Inspect rollers for damage.

4. Network and Connectivity Service Codes

These codes indicate issues with network settings, cables, or software.

Error Code Description Solution
1101 Network connection error. Check the network cables and ensure your printer is connected to the router. Restart the printer.
1102 DHCP server not responding. Verify DHCP settings and ensure your router is configured correctly.
1110 IP address conflict. Assign a unique IP address to your printer using the network configuration settings.

5. General Firmware and Software Service Codes

Outdated or corrupted software can lead to these service codes.

Error Code Description Solution
020 CU firmware checksum error. Update the printer firmware.
024 CU Font ROM hash error. Restart the printer. Replace the Font ROM module if unresolved.

General Troubleshooting Tips for OKI Printers

  1. Restart the Printer: A simple restart can resolve many error codes.
  2. Inspect Consumables: Ensure toner cartridges, fuser units, and drums are installed correctly.
  3. Update Firmware: Download and install the latest firmware for your printer model.
  4. Check for Physical Damage: Inspect components like motors, sensors, and connectors for wear or damage.
  5. Contact Technical Support: Submit a tech support request.

Preventing Service Errors on OKI Printers

  • Use Genuine Consumables: Non-genuine parts can cause errors and damage the printer. Always use OKI-approved consumables.
  • Perform Regular Maintenance: Clean the printer and its components regularly to avoid hardware malfunctions.
  • Stay Updated: Keep your printer firmware up to date to prevent compatibility issues.
  • Handle with Care: Avoid rough handling of sensitive parts like fusers and belts to minimize wear and tear.

Why Choose OKI Printers?

OKI printers are designed for durability and exceptional performance. By understanding and addressing service error codes promptly, you can maximize the lifespan and efficiency of your printer, ensuring uninterrupted operation for your business.