How can I change region on Hyundai HV-510?

[hola99]

Hi, At work we have a region 3 dvd player Hyundai HV-510. I guess it was bought in Korea because its in korean and region 3...my boss told me to change it to region one but I dunno how. I tried several tips for otehr Hyunday but having it in korean doesnt help either.... So if anyone can help me Thank you. We need it to work by the end of the week...If you dunno but know of a site that might please tell me. Thanks in advance.