Canon 7d – ERR20

After exposure, ERR20 – shooting is not possible message. This means some mechanical failure.

Official Canon advice:

“Err 20

Description: A malfunction with the mechanical mechanism has been detected.

Resolution: Turn the power off, then remove and re-install the battery. Then turn the power on again.”

Or say a prayer, whatever.

Reading out with SPT software:

2016-11-19_120133 err240  2016-11-19_120152 err216

This means, the mirror position sensor is not working. I disassembled the camera, and on the flex cable which comes from the sensor, I have found a tiny oxide dot (or what).

DPP_0001  DPP_0003  DPP_0004 

I washed it away with normal water, then I treated it with some methanol, to take away the water.

And now it works, and no error code!

2016-11-19_120205  no error

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About canonrepair

Ruzsa János. Amatőr fotós, Canon DSLR váz. Amateur photographer. Canon DSLR user.
This entry was posted in 7d, oxide, service softver SPT, short circuit. Bookmark the permalink.

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