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Cambridge Audio A3i Power Cord and Transformer Replacement

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In this guide we will replace the power cord and the transformer The transformer is the large, heavy device that converts the relatively high 220V input voltage into a lower voltage for the amplifier.

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  1. Cambridge Audio A3i Power Cord and Transformer Replacement, Case: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Remove 2 screws from each side of the amplifier.

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  2. Cambridge Audio A3i Power Cord and Transformer Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

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

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  4. Cambridge Audio A3i Power Cord and Transformer Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Cambridge Audio A3i Power Cord and Transformer Replacement: crwdns2935265:03crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • 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.

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  5. Cambridge Audio A3i Power Cord and Transformer Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • 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.

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  6. Cambridge Audio A3i Power Cord and Transformer Replacement, Power Cord and Transformer: crwdns2935265:05crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Carefully de-solder ends of power cord from circuit board.

    • Keep track of the colors of the cords. The brown cord leads to the L on the circuit board, and this cord will lead to a fuse in the power plug. The blue cord leads to the N on the board.

    • Finally, pull the power cord through the rear panel to completely remove it.

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  7. Cambridge Audio A3i Power Cord and Transformer Replacement: crwdns2935265:06crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • To remove the transformer the motherboard must be removed. This is to gain access to the solder on the power cords. -See guide for removing motherboard.

    • Remove the 4 nuts holding down the transformer bracket using a 7mm nut driver or socket.

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

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