1INCH-UVLED PCB ASSY - E105982

E105982 – 1-inch UV LED board (1inch-UVLED PCB Assy) – Mimaki UJF

The 1-inch UV LED board (E105982) is fitted to Mimaki UV LED curing printers. It drives the UV curing LED modules and manages their power according to the print cycle.

The Mimaki UJF-3042 maintenance manual designates it "Water cool LED_1inch-UVLED PCB Assy": it is the board that carries the UV LEDs (4 LEDs on a copper circuit, water-cooled, with a monitoring thermistor). Its switching on and brightness are controlled by the "LEDUVx2-DRIVE PCB Assy" board, which manages two of these boards.

Technical specifications

• OEM reference: E105982
• Manufacturer: Mimaki
• Part type: UV LED board (1 inch)
• Manufacturer designation: "Water cool LED_1inch-UVLED PCB Assy"
• LEDs: 4 UV LEDs per board, on a copper circuit
• Cooling: Water cooling, temperature monitored by a thermistor
• Connectors: CN1 10-pin (control); CN2 thermistor
• Location: UV unit ("UV control part"), according to the UJF-3042 maintenance manual
• Note: This page states that the board drives the UV LED modules and acts as the interface between the main board and the curing system. According to the Mimaki UJF-3042 maintenance manual, it carries the UV LEDs; the control (switching on, switching off, brightness) is handled by the "LEDUVx2-DRIVE PCB Assy" board. The reference E105982 does not appear in the pages of the manual consulted: the match is based on the designation.
• Shipping: Ready to install

Compatibility & use

• Mimaki UJF-3042
• Mimaki UJF-3042FX
• Mimaki UJF-3042HG
• Mimaki UJF-6042
• As the board is water-cooled, check the liquid cooling circuit before concluding that the board is faulty.
• If the fault affects both LED boards at once, also check the "LEDUVx2-DRIVE PCB Assy" driver board, which controls both of them.

Function

• Carries 4 UV curing LEDs on a copper circuit that dissipates the heat, according to the Mimaki UJF-3042 maintenance manual
• Monitors its temperature through a thermistor connected to CN2
• Drives the UV curing LED modules
• Manages the on/off switching and power of the LEDs according to the print cycle
• Acts as the interface between the main board and the UV LED curing system

Signs of wear

• Weakened UV curing if LEDs on the board are faulty (the driver board manages 8 of them, spread over two boards)
• UV LEDs not driven
• Insufficient curing
• Poorly cured prints
• UV module errors

Replacing this part restores the machine to proper working order.

Related parts

• LEDUVx2-DRIVE PCB Assy — driver board: switching on, switching off and brightness adjustment of two UV LED boards (connectors CN5 and CN6, 10-pin)

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