Visioneer OneTouch 7400 USB Motherboard Replacement

Introduction

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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Étape 1 Outer Case

Visioneer OneTouch 7400 USB Motherboard Replacement, Outer Case: étape 1, image 1 de 1

On the bottom of the scanner, remove the screw at the top left side.

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Étape 2

Remove the rubber foot pad opposite the screw hole to expose a second screw hole.
Remove the screw beneath the foot-pad.

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Étape 3

Visioneer OneTouch 7400 USB Motherboard Replacement: étape 3, image 3 de 3

Rotate the scanner so the screw hole is located on the top left hand side.
Place the plastic opening tool between the top casement and bottom casement of scanner with the hook facing up.
Gently pry the two casements apart beginning above the screw hole and working your way around.
Note that the top and bottom casings are held together by a series of 6 tabs. There is one tab on each of the long sides of the scanner approximately 6 inches in from the corners. There are two tabs on each of the short sides of the scanner approximately 2.3 inches in from the corners. Use the spudger to unhook the tab from the top casement.

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Étape 4

Separate the two casement pieces.

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Étape 5 Motherboard

Visioneer OneTouch 7400 USB Motherboard Replacement, Motherboard: étape 5, image 1 de 2

Visioneer OneTouch 7400 USB Motherboard Replacement, Motherboard: étape 5, image 2 de 2

On the bottom half of the casing, remove the two screws in the motherboard.

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Étape 6

Carefully detach the wires from the motherboard, pulling slowly but firmly.
On the right hand side, the motherboard is attached to the ribbon. Do not pull too hard.

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