Thanks for your reply but it makes no difference.I guess the document is printed in landscape orientation? Then the most likely cause of the problem is a dirty timing strip. Inside an inkjet printer can be compared to a miniature spray booth, so the timing strip gets stained with ink dust over time. The ink dust can be removed by gently wiping the timing strip with a tissue paper handkerchief wetted with a little window cleaner with ammonia. See this thread about a similar problem.