When troubleshooting a machine code error, it's important to try and identify the root cause of the problem. In this case, the error code M7066 suggests that there may be an issue with a jacking cylinder in the Tray area of the machine.

To diagnose
To resolve the error with the abnormal jacking cylinder at the lower level of the Tray area, it's recommended to check the cylinder's condition, ensure there is no leakage, lubrication of the worn parts and