SC320Ricoh Aficio MP 201

Fixing SC320 Error on Ricoh Aficio MP 201: Laser Unit Fault

The SC320 code signals that the polygon mirror motor of the Ricoh Aficio MP 201 is failing to reach the necessary rotation speed. This error prevents the laser from writing images onto the drum unit. The device remains disabled until the connection or hardware fault within the laser assembly is rectified.

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Common causes

  • 1Motor failure: The polygon motor has exceeded its expected mechanical lifespan.
  • 2Cable connection fault: Loosened ribbon cable causes interrupted communication.
  • 3Sensor blockage: Dust preventing accurate reading of the polygon motor rotation.

Solutions

Motor Maintenance

  1. Access the laser unit by removing the top covers.
  2. Clean the motor area using compressed air to remove toner dust.
  3. Verify that the motor can spin freely without mechanical resistance.

Connection Check

  1. Disconnect and re-seat the ribbon cable between the laser and the controller board.
  2. Inspect the ribbon cable for signs of fraying or damage.

Steps to follow

  1. 1

    Open Device

    Carefully remove the outer casing to expose the laser module assembly.

  2. 2

    Check Connections

    Ensure the ribbon cable is correctly inserted into its socket on the main board.

  3. 3

    Test Operation

    Manually feel for resistance in the motor to rule out seized internal bearings.

Frequently asked questions

Most technicians recommend replacing the entire laser unit, as the motor is precisely aligned and sealed within the housing.

If the cable connections are clean and secure and the error persists, the fault is almost certainly located in the laser motor unit itself.

Yes, it is a typical sign of wear and tear in units that have been used heavily over many years.

Fixing SC320 Error on Ricoh Aficio MP 201: Laser Unit Fault | Vimazdev