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This guide shows how to remove the Visioneer OneTouch 7400 USB motherboard for repair or replacement.
WARNING: Circuitry will be exposed. Handle the motherboard carefully in order to avoid damage to the equipment and yourself. Keep the equipment away from heat sources and water.
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On the bottom of the scanner, remove the screw at the top left side.
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Remove the rubber foot pad opposite the screw hole to expose a second screw hole.
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Remove the screw beneath the foot-pad.
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Rotate the scanner so the screw hole is located on the top left hand side.
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Place the plastic opening tool between the top casement and bottom casement of scanner with the hook facing up.
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Gently pry the two casements apart beginning above the screw hole and working your way around.
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On the bottom half of the casing, remove the two screws in the motherboard.
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Carefully detach the wires from the motherboard, pulling slowly but firmly.
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Flip the motherboard over carefully.
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Gently pull the ribbon out of its bed.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.