Lexmark Confidential
13
111.21 Service Printhead Error
• The printer will post a 111.21 Printhead Error upon boot up or after
re-inserting the Toner Cartridge and Imaging Unit inside the printer.
• It could be due to the Printhead not getting the required power to
start due to faulty signal transmission caused by improper insertion
of the Toner Cartridge and Imaging Unit.
• The error means that the Printhead +5V power line was not ON
when the laser servo started. It is possible that the Printhead is not
defective.
• To fix the issue, reseat the Toner Cartridge and Imaging Unit.
• If issue persists, replace the Printhead assembly.
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