Canon Eos 20D Cf Card Slot Repair Repair Guide

Difficulty

Very difficult

Steps

Time Required

                          1 - 2 hours

Sections

Viewfinder Eyepiece Cap
1 step
Rear Case
4 steps
Secondary Control Board (C-Board 010)
2 steps
CF Card Slot
1 step
Canon EOS 20D CF card slot repair
4 steps

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What you need

Step 1

              Remove the eyepiece cap

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

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

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Step 2

              Remove screws from under the eyepiece cap

Remove the two screws hidden under the viewfinder eyepiece cap.

Remove the two screws hidden under the viewfinder eyepiece cap.

Step 3

              Remove hidden screw and other visible screw

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.

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.

Step 4

              Remove bottom screws

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

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

Step 5

              Lift and remove the rear panel

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.

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.

Step 6

              Disconnect all the labeled cables

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.

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.

Step 7

              Remove the secondary control board

Remove the three screws from the edges of the board.
Flip the board up and out so that the ground connection can be unscrewed.

Remove the three screws from the edges of the board.

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

Step 8

              CF Card Slot

Open the connector for the CF slot.
Remove the screw that attaches the bottom of the CF slot.
Remove the two last screws attaching the top of the CF slot.
Remove the CF slot.

Open the connector for the CF slot.

Remove the screw that attaches the bottom of the CF slot.

Remove the two last screws attaching the top of the CF slot.

Remove the CF slot.

Step 9

              Attempt to rebend bent pins

This is one of several issues with this CF connector. This pin is severely bent.
When the pin is bent this badly, it’s very likely that it will snap when you try to rebend it. There’s no harm in attempting to carefully bend it back though.

This is one of several issues with this CF connector. This pin is severely bent.

When the pin is bent this badly, it’s very likely that it will snap when you try to rebend it. There’s no harm in attempting to carefully bend it back though.

Step 10

              Replace damaged pins

I was able to relatively easily replace the pin that snapped with a section of solid-core wire from an ethernet cable.
The pin I replaced here is supposed to be longer than its neighbors. This is one of the extended pins on the connector.
Working on the next steps will be much easier if you remove the metal shield that is attached to the CF slot by clips. I forgot to include this in the guide photos.

I was able to relatively easily replace the pin that snapped with a section of solid-core wire from an ethernet cable.

The pin I replaced here is supposed to be longer than its neighbors. This is one of the extended pins on the connector.

Working on the next steps will be much easier if you remove the metal shield that is attached to the CF slot by clips. I forgot to include this in the guide photos.

Step 11

              Fix damage from pins that got pushed in

Some pins had gotten pushed in far enough that they ripped up traces, so it was necessary to reroute their connections from the bottom vias.
To be able to solder to the vias, you have to scratch the solder mask off of them with a sharp tool like an Xacto knife.
Then it can finally be soldered to with a high gauge wire. I took a section of larger stranded-core wire, cut it, and unwound it.
Taping the connector down to your work surface makes it easier to work on the small solder joints required here.

Some pins had gotten pushed in far enough that they ripped up traces, so it was necessary to reroute their connections from the bottom vias.

To be able to solder to the vias, you have to scratch the solder mask off of them with a sharp tool like an Xacto knife.

Then it can finally be soldered to with a high gauge wire. I took a section of larger stranded-core wire, cut it, and unwound it.

Taping the connector down to your work surface makes it easier to work on the small solder joints required here.

Step 12

              Extra pin fixing tips

This is one of the cases in which I was able to reuse a pin that was broken internally but not externally, simply by pushing it back into place and running a wire from the piece left inside.
When soldering to the vias, note that from the rear (the area where all the pin connections are soldered to), the two pin connections on the far right and far left are ground, and don’t connect down to these vias.
Make sure not to leave large lumps of protruding solder like the one here. I ended up having to slim it down, since it touched the metal housing of the connector when I put it back together.
Hopefully when you reassembly your EOS 20D, you won’t be getting the “Err CF” message anymore.

This is one of the cases in which I was able to reuse a pin that was broken internally but not externally, simply by pushing it back into place and running a wire from the piece left inside.

When soldering to the vias, note that from the rear (the area where all the pin connections are soldered to), the two pin connections on the far right and far left are ground, and don’t connect down to these vias.

Make sure not to leave large lumps of protruding solder like the one here. I ended up having to slim it down, since it touched the metal housing of the connector when I put it back together.

Hopefully when you reassembly your EOS 20D, you won’t be getting the “Err CF” message anymore.

To reassemble your device, follow the disassembly instructions in reverse order.

Cancel: I did not complete this guide.

Author

                                      with 1 other contributor

                    Alec M

Member since: 05/08/2016

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Иван Рипилевский - Mar 10, 2019

Thank you! Great guide))

Alec M - Mar 10, 2019

Thanks! I’m glad you found it helpful!

Let me know if you have any questions about repairing the 20D :)

alfiandhy aziz firdaus - Oct 27, 2020

i have a problem, when my pin memory broken, just one pin, and the line almost completely removed, pleas help me

Alec M - Oct 27, 2020

Hi!

What exactly is your problem? It sounds like you’re saying that the pin is broken. What does “the line is almost completely removed” exactly mean though? If it’s a broken trace on the top side, don’t worry, you can run wires from the vias on the opposite side to fix that.

Per Blaaberg - Jul 5, 2021

really good job, thank you

Per Renno Blaaberg

Member-Contributed Guide#

What you need#

Member-Contributed Guide

What you need