Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement

Introduction

This guide will show you how to properly replace a faulty USB or headphone input in your Cisco Meraki MC74-HW. The following seven (7) steps will guide you through the replacement. This project is meticulous so patience and care are necessary while fixing the USB/headphone jack. A pair of tweezers and a JIS #00 screwdriver are required for this project to replace the board.

What you need

Step 1 Back Housing and Device Stand

Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement, Back Housing and Device Stand: step 1, image 1 of 3

Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement, Back Housing and Device Stand: step 1, image 2 of 3

Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement, Back Housing and Device Stand: step 1, image 3 of 3

Extend the stand as far away as possible from the device.
Remove all four 3 mm Hex 2 screws from the stand.
A bit with a flexible extension may be needed to remove these screws.

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Step 2

Lift the stand off the device.

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Step 3

Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement: step 3, image 3 of 3

Insert a plastic spudger between the back housing cover and the sensor cover piece.
Work your way slowly around the edges of the device until all the clips have been unclipped.
Do not insert any tool recklessly into the device or you might damage wires and connections.

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Step 4

Separate the back housing cover from the device completely.

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Step 5 USB and Headphone Jack Inputs Board

Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement, USB and Headphone Jack Inputs Board: step 5, image 1 of 2

Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement, USB and Headphone Jack Inputs Board: step 5, image 2 of 2

Tool used on this step:

Tweezers

$4.99

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Disconnect the ribbon cable on the board using a pair of reverse tweezers.
Electronic ribbons are very fragile, so pull slowly to disconnect them.

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Step 6

Cisco Meraki MC74-HW USB and Headphone Jack Inputs Board Replacement: step 6, image 3 of 3

Remove the three 2 mm screws holding the USB and headphone jack inputs board using a JIS #00 screwdriver.
Carefully lift the board until you have clear access to the electronic connector.

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