11. Maintenance
The counting sensor and the feeding sensor are belong to the optical equipment. If there is some dust and dirty things
covering the sensor, it will lead to the fault when the machine is working . The user should clean the machine after
using.
For example, if there is some pieces of paper, dust or something else covering the reset sensor in the stacker, it
will result in fault when the machine is working. The user should clean the machine after using.