Now these things are usually terrible when it comes to quality, and mine was too when I first started using it. But for some reason it has cleared up significantly after about 2 months of use. I mean I use it in High with Interlaced mode and its very good.
Oh, perhaps you should open it up and identify the components just to see if there are differences when compared to other A520's.
Truly,
Robert Bernardo
Fresno Commodore User Group
http://www.dickestel.com/fcug.htm