HP Color LaserJet Professional CP5220 Service Manual - Page 66
Pressure roller pressurization and depressurization control
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Pressure roller pressurization and depressurization control The product releases the pressure roller from the fuser sleeve, except during printing, to prevent deforming the fuser sleeve and the pressure roller and to facilitate the jam-clearing procedure. 1. The DC controller reverses the fuser motor to rotate the fixing pressure release cam. 2. The pressure roller is pressurized or depressurized depending on the position of the cam. The DC controller determines a fuser pressure-release mechanism abnormality and notifies the formatter when it does not sense the fuser pressure-release sensor for a specified period from when it reverses the fuser motor. Figure 1-41 Pressure roller pressurization and depressurization control DC controller M4 Fuser motor PS9: Fuser pressure release sensor Fuser pressure release cam Pressure roller Fuser sleeve 54 Chapter 1 Theory of operation ENWW