Our office uses a xerox phaser 7760 and it is not very old. After I changed the waste cartridge several weeks ago, the printer started to print magenta strips all over the page (sometimes with texts sometimes not). However, I tried to open the door to let fuser cool down, sometimes it went back to work for 5 mins, but most time it still printing all magenta consistently. Recently I found the black part besides the fuser has magenta on it too and it is removable by finger.
Does anyone know where the problem is and what that part is called?
(We had tried to change imaging unit and developers, and the problem is still there.)
Thank you very much!