SEMTOM ST-900 - Maintenance; Warning

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10. Maintenance
The counting sensor and the start sensor belongs to the optical equipment. If there is some dust and
dirty things covering the sensor, it will lead to the fault when the machine work. The user should clean the
machine after using.
11. Warning
Turn off the machine or pull out the power plug before cleaning the machine.
Do not use chemical cleaning agent to clean the machine.