error-991mc563w

OKI MC563w error 991: System memory error

OKI MC563w error 991 indicates a communication timeout or internal memory buffer overload. This is usually triggered by network traffic.

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Common causes

  • 1Network packet loss.
  • 2Corrupt driver installation.
  • 3RAM buffer overflow.
  • 4Incompatible printer driver version.

Solutions

Diagnóstico rápido

Error 991 occurs when the processor times out during data processing.

Solución paso a paso

  1. Clear all active print jobs on connected computers.
  2. Reboot the printer to clear RAM.
  3. Update your printer's firmware.

Prevención y mantenimiento

Limit concurrent print jobs; keep firmware current.

Cuándo llamar a un técnico

If standard resets fail, motherboard replacement might be required.

Ficha técnica del equipo