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April 4, 2025

Ricoh MP C03 Series Error Codes: Meanings and Fixes

Ricoh MP C03 Series Error Codes: Meanings and Fixes (MP C3003, C3503, C4503, C5503, C6003)

The Ricoh MP C03 series, including models like MP C3003, C3503, C4503, C5503, and C6003, is a reliable multifunction printer line. However, users may encounter error codes that disrupt operation. Below, we list the most common Ricoh MP C03 series error codes, their meanings, and step-by-step fixes to resolve them.

1. Fusing & Temperature Errors

These errors relate to the fusing unit, which heats toner onto paper.

  • SC541 – SC549: Fusing unit temperature issues (overheating or insufficient heat).
  • SC543: Thermistor failure (faulty temperature sensor).
  • SC548: Fusing roller pressure release malfunction.
  • Fix: Power off the printer, wait 10 minutes, then restart. If unresolved, reset in Service Mode: Press Clear Modes → 107 → Hold Stop for 5 seconds → Enter SP5-810 → Execute.

2. Paper Jam & Feeding Issues

Paper transport or tray malfunctions often trigger these codes.

  • SC500: Paper transport motor error.
  • SC501 – SC504: Paper feed tray lift failure.
  • SC506: Paper feed clutch issue.
  • SC510: Transport motor overload.
  • Fix: Inspect for paper jams, clean the feed rollers with a damp cloth, and reset the machine by restarting.

3. Toner & Imaging Unit Errors

These codes indicate problems with toner, drum, or imaging components.

  • SC300 – SC302: Charge roller or drum charge failure.
  • SC320: Laser unit polygon mirror motor error.
  • SC360 – SC363: Developing motor failure.
  • SC392: Waste toner bottle full.
  • Fix: Replace or clean the toner cartridge, imaging unit, or waste toner bottle as needed.

4. Scanner & Optical System Errors

Scanner-related issues affect copying and scanning functions.

  • SC400 – SC402: Image density sensor malfunction.
  • SC440: Scanner motor failure.
  • SC450: Scanner carriage movement issue.
  • Fix: Clean the scanner mirrors with a soft cloth, restart the printer, or replace the scanner motor if necessary.

5. Network & Communication Errors

These errors disrupt printing or connectivity.

  • SC990: Software bug or system freeze.
  • SC991: Unknown controller error.
  • SC860 – SC863: Hard disk drive (HDD) failure.
  • SC899: Print job error (corrupt file or unsupported format).
  • Fix: Restart the machine, clear pending print jobs, or update the firmware via Ricoh’s official website.

6. Developer & Drum Unit Issues

Problems with developer or drum units affect print quality.

  • SC202 – SC203: Laser synchronization failure.
  • SC285: Developer unit malfunction.
  • SC495: Toner density sensor issue.
  • Fix: Replace the developer unit or clean the sensors with a dry cloth.

How to Reset Error Codes on Ricoh MP C03 Series

Follow these steps to reset most error codes manually:

  1. Enter Service Mode:
    • Press Clear Modes → 1-0-7 → Hold Stop for 5 seconds.
  2. Access SP Mode:
    • Navigate to SP5-810 (SC Reset).
  3. Reset the Code:
    • Press Execute, then power off and restart the printer.

⚠ Warning: If the error persists after resetting, contact a professional technician for servicing.

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