兄弟7010打印机滴滴响.back cover open the back cover怎么办

兄弟7010打印机滴滴响.back cover open the back cover怎么办 兄弟7010开机滴滴的响、出现Back cover open close the Back cover是怎么回事? 兄弟出现back cover open close the back cover. Back cover open ciose the Back cover 打印机型号：兄弟FAX-2820.不能打印 显示close the back cover open ,可是后盖是关好的 打印机上的 back cover open close the back cover 是什么意思呀 联想打印机,M3120 ,出现close the back cover,back cover open! 复印机故障显示 back cover open close the back cover 出现back cover open close the back cover. 兄弟一体机DCP-7010,打印机显示“open the front cover and remove the Drum 我的联想3220一体机提示Back cover open close the back cover.如题 英文"OPEN BACK COVER THEN REMOVE PAPER