Samsung MULTIXPRESS CLX-9251 Series Service Manual page 422

4. Troubleshooting
10) Recognition error of the side cover problem
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Symptom : The side cover is closed, but the open message of the side cover displays on LCD.
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Cause : The spring plate of the side cover open sensor is deformed by the deformation of the stopper of the side cover.
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Troubleshooting
1) Replace the side cover open sensor Assy or deform the spring plate to normal shape.
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