1.Please open the back door of the money detector and pull down the inner door to see if there are bills stuck inside.
2.Please follow the video to calibrate the CIS
Demo video: http://u.pc.cd/9LditalK
3.If the above two steps cannot be solved, it means that the CIS tube of the machine is faulty, please contact us to send a new machine.
Dear MUNBYN Customer, contact us for further assistance