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Replacement of the mainboard on any Kaffelogic Nano or Nucleus Link coffee roaster with an A, B, C or N prefix serial number.
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Remove the 6x 2.5mm Hex screws on the left and right side of the roaster.
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Hold the roaster steady while removing the plastic top/closure.
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Remove the 4x 2.5mm Hex screws on the bottom of the roaster.
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Pull away the front panel carefully.
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Stand the roaster up again and pull away the rear panel from the chassis to expose the remaining components.
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Boards may vary, the PCB in your roaster may not look like the one in this guide, but the steps should still match the general replacement process.
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Pull upwards on the SSR signal connector to remove it.
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Use a 2.0mm slotted screwdriver to remove the thermocouple wires from the PCB-A
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If your thermocouple connector looks like this, you will need to follow this step.
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Use the end of a cable tie or very small plastic spudger to open the contact and remove your thermocouple wires. You may need to trim the cable tie end to fit into the slot.
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(Applicable to early models) Pull upwards on the motor controller signal connector to remove it.
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Unplug your motor if your roaster is fitted with a connector, otherwise de-solder the motor controller power.
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Carefully pull on the ribbon cable to remove it.
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Remove the 4x PH2 PCB screws.
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Prepare your soldering iron and de-solder/reflow the two transformer wires to remove them.
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Your mainboard is now removed and ready for rework or replacement. Replace the serial code on the bottom of your roaster with the included QR label.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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