Cleaning the drum unit
If your printout has coloured dots at 94 mm intervals the drum may have something stuck to the drum surface, such as glue from a label. Follow the steps below to solve the problem.
a Make sure that the machine is in the Ready mode. Press Menu, 5, 6, then press Mono Start or Colour Start to print the drum dot check sheet.
56.Drum Dot Print
Printing
b Turn off the machine. Disconnect all cables, and then unplug the power cord from the electrical socket.
c Press the front cover release button and then open the front cover.
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