GENUINE OEM PULL 24-PIN FAMILY FAN HEADER

OKI / Okidata Main Logic Controller Board 44588599 (44779801) with Fan Header – ML390 / ML391 Turbo 24-Pin

This is a genuine Okidata EXA main controller board, part number 44588599 (interchangeable with 44779801), for the OKI Microline ML390 Turbo and ML391 Turbo 24-pin dot matrix printers, including the network "n" models. It has the factory-integrated cooling fan plug header and works in printers with or without an internal fan. It's a used OEM pull from a decommissioned corporate/industrial printer environment, in clean cosmetic condition. The photos are of the actual item.

✔ MPN 44588599
✔ Interchange 44779801
✔ For ML390 / ML391 Turbo (24-pin)
✔ Cooling fan plug header
✔ Parallel & USB interfaces intact
✔ Clean, no bulging capacitors
Condition
Used OEM Pull
Part Numbers
44588599 / 44779801
Technology
24-Pin Dot Matrix
Support
Reply in 24 Hrs

Product Information

  • Manufacturer / Brand: OKI / Okidata
  • Primary part number (MPN): 44588599
  • Alternate / interchange part number: 44779801
  • Item type: Main logic board / controller PCB / motherboard
  • Print technology: 24-pin dot matrix (impact)
  • Interfaces: Parallel and USB

This is a genuine Okidata EXA controller board. Its full circuit layout manages the heavy-duty 24-pin firing sequences and the interface data transmission.

⚠ Technical Revision Note

  • Hardware variation: This board has the factory-integrated cooling fan plug header layout.
  • Later-revision printers with a fan: It's a direct replacement for later-revision ML390/391 Turbo printers that use active internal fan cooling.
  • Older printers without a fan: It's also backward-compatible with older, passively cooled printers. Just leave the white fan header empty.

Verified Model Compatibility

  • Okidata Microline (ML) 390 Turbo
  • Okidata Microline (ML) 391 Turbo
  • Okidata Microline (ML) 390 Turbo n (network model)
  • Okidata Microline (ML) 391 Turbo n (network model)
Compatibility warning: Please match your existing board number (44588599 or 44779801) or check your equipment manual before ordering to confirm it fits.

Condition

  • Used / OEM pull-part. This is a genuine Okidata board, pulled from a decommissioned corporate/industrial printer environment.
  • Clean cosmetic condition.
  • No bulging capacitors.
  • The parallel and USB interface connections are intact, and the pin tracks are clean.
  • The photos are of the actual item you will receive.

Terms

  • Compatibility: Please match your existing board number (44588599 or 44779801) or check your equipment manual before ordering.
  • Security marking: To prevent fraud and component swapping, every board is discreetly marked and serialized before shipping. A returned item must still show the original seller markings to qualify for a refund.

✔ What's Included

  • 1 x OKI / Okidata main logic controller board, part number 44588599 (as pictured)

Shipping

Handling time is 1–2 business days. Ships by standard shipping, with tracking.

Customer Service

We respond to messages within 24 hours.

Returns

See the return policy section of this listing.