OKI Main PCB (KUM), ML3410

For technicians and service providers who need to restore an OKI ML3410 dot matrix printer to full operation, this main logic board (KUM variant) offers a direct, reliable replacement for the original controller. Unlike generic or refurbished boards of uncertain provenance, this unit arrives new and pre-loaded with the correct firmware, eliminating configuration guesswork and reducing downtime.

Highlights

• Exact replacement for OKI ML3410 main PCB (KUM variant)
• Pre-loaded with ML3410 firmware for immediate operation
• Dual external interfaces: parallel (Centronics) and serial (RS-232)
• On-board LEDs for quick status diagnostics
• FR4 PCB with integrated ESD protection for long service life

In daily use

Once installed, the board takes over all core printer functions: controlling the print head, paper feed motors, sensors, and user panel. The parallel and serial ports allow connection to legacy systems, while internal ribbon cable connectors ensure compatibility with the original wiring harness. Jumpers or DIP switches may be present for configuration, and the board mounts using standard standoffs.

Full specifications

• Compatible printer: OKI ML3410
• Board type: Main logic board (MLB)
• Variant identifier: KUM
• External connectivity: 1x parallel (Centronics), 1x serial (RS-232)
• Internal connectivity: Ribbon cable connectors for print head, control panel, motors, sensors
• Firmware: Pre-loaded OKI ML3410
• Processor: Embedded microcontroller
• Memory: Flash ROM for firmware, RAM for buffer/operations
• Diagnostics: On-board LEDs
• Configuration: Jumpers or DIP switches (as required)
• Material: FR4 PCB
• Mounting: Screw-down via standoffs
• Input power: From printer's internal power supply
• ESD protection: Integrated
• Part condition: New

Final note

This main PCB is a critical spare for maintaining OKI ML3410 printers in demanding environments. With its verified firmware and robust construction, it ensures consistent performance and longevity.