591C110

Error 591 OKI C110: Cyan Toner Failure

The OKI C110 error 591 indicates a specific communication failure with the cyan toner cartridge. This typically occurs when the chip contacts are dirty or if the cartridge is not fully seated. It is a routine issue after replacing consumables.

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Common causes

  • 1Dirty toner chip.
  • 2Cyan cartridge misalignment.
  • 3Bent printer connector pin.
  • 4Incompatible toner version.

Solutions

Quick Diagnosis

If the error occurs after toner replacement, the issue lies with the chip. If it appeared during printing, check for contact wear.

Step-by-step fix

  1. Open top cover.
  2. Remove cyan toner and clean gold contacts.
  3. Check printer connectors for toner dust.
  4. Reinstall firmly.

Prevention

Use genuine toner to ensure correct chip handshake. Do not touch gold chips.

When to call a pro

If cleaning doesn't help and another toner cartridge fails, the internal reader board may be broken.

Technical Data

  • Technology: Digital LED
  • Speed: 10 ppm (color)
  • Connectivity: USB 2.0
  • Consumables: C110 Cyan Toner
  • Usage: Home/Small Office
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Remove cartridge

    Open cover and remove cyan.

  2. 2

    Clean contacts

    Wipe with dry cloth.

  3. 3

    Reinstall

    Seat firmly.

Frequently asked questions

Cyan toner chip unrecognized.

Try cleaning first.

Original C110 cyan.

Clean drum area.