c-4502bizhub C558

Fix Konica Minolta bizhub C558 error C-4502: Scanner Failure

The Konica Minolta bizhub C558 error C-4502 indicates a malfunction in the scanner motor or the carriage positioning system. During startup, the MFP initializes the optics module; if the module is obstructed or the motor drive fails, the C-4502 code is triggered. This fault is common in high-usage environments where dust accumulation limits optical carriage movement.

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Common causes

  • 1Stepper motor failure within the scan assembly.
  • 2Damaged drive rail or belt leading to resistance.
  • 3Flat ribbon cable fault disconnecting optics from the motherboard.
  • 4Debris obstructing the optical path.

Solutions

Quick Diagnosis

If the machine emits a mechanical clicking sound upon startup followed by the C-4502 code, it indicates a physical blockage or failed stepper motor drive.

Step-by-Step Solution

  1. Power off the unit and unplug it from the wall outlet.
  2. Raise the ADF and check for foreign objects (like paper clips or stray labels) obstructing the glass area.
  3. Test carriage movement by gently pushing the scanner assembly. It should glide with minimal, smooth resistance.
  4. Power on the unit to allow the home sensor to calibrate the carriage position.

Prevention and Maintenance

Use isopropyl alcohol to clean the guide rails periodically, ensuring smooth operation. Prevent dust buildup around the platen area to protect sensitive optical components.

When to Call a Technician

If the error C-4502 persists after following these steps, the motor, drive belt, or flat data cables likely require professional replacement.

Technical Specifications

  • Technology: Color Laser Multifunction
  • Speed: 55 ppm
  • Connectivity: Gigabit Ethernet
  • Capacity: Up to 6,650-sheet max
  • Consumables: TN-514 series
  • Usage: Commercial high-volume
  • Official drivers / firmware

Steps to follow

  1. 1

    Power cycle

    Shut down the MFP completely and wait briefly.

  2. 2

    Check carriage

    Ensure the scanner carriage moves freely on the rail.

  3. 3

    Clean

    Wipe the exposure glass and verify no obstructions.

Frequently asked questions

This code signifies that the scanner carriage cannot reach its home position due to mechanical resistance or motor stall.

Usually, if a simple restart and track cleaning don't work, there is a failed mechanical component that requires expert service.

The machine uses TN-514 toner cartridges.

Regularly clean the glass with non-abrasive glass cleaner and keep the ADF area free from debris.