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Payment module issue
Printer is not working.
Make sure there is enough receipt paper in the printer.
Make sure the receipt paper is properly inserted into the printer.
Make sure the cover of the receipt paper is closed.
Check the power and signal cable connection status, and restart the product.
Press the Self Test button to check if the printer works. It is not the problem of the printer if it
works.
QR code/bar code sensor
Check the power and signal cable connection status, and restart the product.
If the recognition results are poor, clean the sensor with a smooth, damp cloth, and then wipe
out the moisture and try again.
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