Maintaining Your Printer 377Replacing the Print Head Device (PHD) UnitCAUTION: Before performing any of the following procedures, read and followthe safety instructions in your Product Information Guide.NOTICE: Protect the drums of the Print Head Device (PHD) against bright light.If the front cover remains open for more than three minutes, print quality maydeteriorate.NOTICE: Ensure nothing touches or scratches the surface (black-colored film) ofthe belt unit. Scratches, dirt, or oil from your hands on the film of the belt unit mayreduce print quality.Removing the PHD Unit1 Ensure that the printer is turned off.2 Pull the standard 250-sheet tray out of the printer about 200 mm. Hold thestandard 250-sheet tray with both hands, and remove it from the printer.3 Push the side button to open the front cover.
