打印机显示“open the front cover and remove the Drum,then remove j

打印机显示“open the front cover and remove the Drum,then remove jammed paper”
我现在已经打开前盖,但是找不到 the Drum,不晓得应该移动什么鼓,怎样才能取出被卡住的纸啊?是联想m3220的打印机.