e-300c112

OKI C112 error E-300: Troubleshooting guide

The OKI C112 error E-300 is a paper feed system alert that requires immediate attention. This fault occurs when the printer attempts to pull paper and the sensors detect an obstruction or feed failure. Identifying whether this is due to misaligned paper or a mechanical sensor fault is key to resolution. This printer series is built for high-demand small office environments.

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Common causes

  • 1Misaligned paper in the tray.
  • 2Debris accumulation on the optical sensor.
  • 3Premature wear of the pick-up roller.
  • 4Using paper exceeding the weight limit.

Solutions

Quick Diagnosis

The E-300 error on the OKI C112 is confirmed when the control panel blinks intermittently after a print command. If paper fails to feed or halts midway, ensure the registration sensor is not obstructed by debris.

Step-by-Step Solution

  1. Power off the unit and unplug for 30 seconds.
  2. Remove the tray and verify paper alignment against side guides.
  3. Clean the sensor area using a lint-free cloth.
  4. Run a test page to verify proper traction.

Prevention and Maintenance

Avoid excessive humidity, as wavy paper is the primary cause of feed roller failures. Keep the tray area clean. Heavy cardstock can strain these sensors.

When to Call a Technician

If the error persists after these steps, a physical sensor may be misaligned or broken, requiring professional service.

Equipment Data Sheet

  • Technology: Digital LED
  • Speed: 20 ppm
  • Connectivity: USB 2.0
  • Consumable: C112 toner series
  • Use: Home/Small Office
  • Official drivers / firmware

Steps to follow

  1. 1

    Check tray

    Remove the paper tray fully from the unit.

  2. 2

    Inspect

    Look for paper scraps in the path.

  3. 3

    Restart

    Power cycle the printer to reset sensors.

Frequently asked questions

This error occurs when the input sensors fail to detect paper correctly during a print cycle.

No, it is usually a minor mechanical obstruction.

This model requires original C112 series toner to prevent debris.

Clean the feed rollers every 5,000 pages.