BLACK MARKS ON PAGE

if the black marks are in teh same place every time and you are putting teh page on the exsposure glass give the galss a clean as there could be some ink or dirt on it .. if the marks are moving across the page it could be down to the drum being marked or if he marks are spaced a bit wider it could be the fuser has a mark on it check these as well.. if the mark is a line look at where the paper goes through the document feeder check the thin **** glass it passes over to make sure there isnt any tipex or ink left on it.. all the glass can be cleaned with regular glass cleaner and a soft cloth