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Canon EOS 20D Secondary Control Board (C-Board 010) Replacement

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  1. Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove the eyepiece cap: step 1, image 1 of 2 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove the eyepiece cap: step 1, image 2 of 2

    • Pull up on both sides of the the eyepiece cap. It should come off with little pressure.

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  2. Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove screws from under the eyepiece cap: step 2, image 1 of 1

    • Remove the two screws hidden under the viewfinder eyepiece cap.

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  3. Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove hidden screw and other visible screw: step 3, image 1 of 3 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove hidden screw and other visible screw: step 3, image 2 of 3 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove hidden screw and other visible screw: step 3, image 3 of 3

    • Peel off the rubber grip on the back by grasping one of the corners and pulling it away from the camera body.

    • Once removed, a hidden screw is revealed.

    • Remove both screws from the rear of the camera.

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  5. Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove bottom screws: step 4, image 1 of 1

    • Remove the two indicated screws from the bottom of the camera.

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  6. Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Lift and remove the rear panel: step 5, image 1 of 3 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Lift and remove the rear panel: step 5, image 2 of 3 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Lift and remove the rear panel: step 5, image 3 of 3

    • When lifting the panel, make sure not to lift it too high, since you'll run the risk of tearing the cable, or damaging the connector on the board.

    • Flip the lock on the flex cable connector up with a spudger.

    • The front panel should pop off, now that the cable has been disconnected.

    • When reassembling the device, make sure to insert the left side of the front panel first, since it has a small lip that needs to fit under the left part of the camera case.

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  7. Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Disconnect all the labeled cables: step 6, image 1 of 3 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Disconnect all the labeled cables: step 6, image 2 of 3 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Disconnect all the labeled cables: step 6, image 3 of 3

    • Disconnect all the indicated connectors by opening their latches.

    • Remove the flex cable that connects the logic board to the secondary control board.

    • Pull the small green connector out of its socket. Be careful when removing it, as it is possible to tear the tiny wires running into the connector.

    • Disconnect the two hidden connectors under the top connector indicated in pink.

    • Disconnect the third hidden connector.

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  8. Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove the secondary control board: step 7, image 1 of 2 Canon EOS 20D Secondary Control Board (C-Board 010) Replacement, Remove the secondary control board: step 7, image 2 of 2

    • Remove the three screws from the edges of the board.

    • Flip the board up and out so that the ground connection can be unscrewed.

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Conclusion

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

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Alec M

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