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Cambridge Audio A3i Motherboard Replacement

Introduction

This guide describes the steps necessary to replace the motherboard of the system. This board contains the circuitry for the amplification, power, and output.

What you need

  1. Cambridge Audio A3i Motherboard Replacement, Case: step 1, image 1 of 1

    • Remove 2 screws from each side of the amplifier.

    Edit

  2. Cambridge Audio A3i Motherboard Replacement: step 2, image 1 of 1

    • Remove 2 screws on rear of device. Slide top cover up and back from main case.

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  3. Cambridge Audio A3i Motherboard Replacement: step 3, image 1 of 2 Cambridge Audio A3i Motherboard Replacement: step 3, image 2 of 2

    • Remove 3 screws on bottom of case.

    • Remove 13 screws on rear panel.

    • Do not move the rear panel too far, as the power cord is still connected.

    Edit

  5. Cambridge Audio A3i Motherboard Replacement: step 4, image 1 of 1

    • Using a pair of pliers, squeeze the retainer for the power cord as shown and pull it toward the external side the panel.

    • It may require some wiggling, but it should slip out of the hole and then off of the cord.

    Edit

  6. Cambridge Audio A3i Motherboard Replacement, Motherboard: step 5, image 1 of 1

    • Remove 2 screws from each side of the heatsink. These must be accessed from directly above the device.

    • Remove the green grounding wire from the mounting screw.

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  7. Cambridge Audio A3i Motherboard Replacement: step 6, image 1 of 1

    • With the amplifier on it's side, remove the 4 screws that hold the motherboard frame to the main case.

    • Be sure to hold the motherboard with one hand while removing the mount screws.

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  8. Cambridge Audio A3i Motherboard Replacement: step 7, image 1 of 2 Cambridge Audio A3i Motherboard Replacement: step 7, image 2 of 2

    • Unscrew ground wire from main case.

    • De solder 4 wires coming from transformer.

    • The motherboard can now be lifted from the case. Any part that needs to be removed from it can be de-soldered.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

One other person completed this guide.

Author

with 6 other contributors

Colby

Member since: 04/15/10

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Team

Cal Poly, Team 28-36, Regan Spring 2010 Member of Cal Poly, Team 28-36, Regan Spring 2010

CPSU-REGAN-S10S28G36

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