The problem is the fuser heating element is not getting the correct temp. Or the film has shifted to one side & the sensor is not seeing the white square on the film. Take out the fixing assy and ck the film. The part number for the film assy is FM3-1796-020 & just the film only is 29129. Also, on the fixing assy, the cleaning roller built up with toner can cause problems
RAHUL SOMWANSHI, September 2013