How do I tune in my LD506 portable 5 inch television?

I am requiring an instruction booklet on how to tune in my LD506 portable TV. I purchased the above from Comet in Canterbury on the 3/4/07 as a display model. The instruction book had got lost. If there is any way of Emailing me instructions I would be very much obliged to enable me to tune it in. I did have sound but that has disappeared and occasionally get a clear picture but not knowing what buttons to press I end up with foreign language or the picture is upside down. I am using the outside aerial as it is a bad reception area where I live.