How to Replace/Reset a Drum Unit in Your Printer or Fax Machine?
What Do Printer Drums Do?
Amazon.com: (Drum Only) TG Imaging (1xDrum) Compatible for HP 32A Drum Unit CF232A CF 232A 232 (1-Pack) Work for M118DW M148DW M148FDW M203DW M227FDW Printer (Drum Unit for HP 30A 30X) :
What is an imaging drum unit? - Zoomtoner
Applying Toner - How Laser Printers Work | HowStuffWorks
What is a Printer Drum? (The Heart and Soul of Your Laser Printer) - Toner Buzz
Static Control | How A Laser Printer Works: The OPC Drum