What is the sign for the printer drum needs to be replaced?
Amazon.com: Brother Printer DR730 Drum Unit Toner : Office Products
Laser printing - Wikipedia
Drum Unit for Brother HL 5140, 5150, 5170, MFC 8040, 8220, 8440, 8840, DCP 8040 & 8045 Laser Printer
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) :
Drum Printer png images | PNGWing
The Difference Between a Toner Cartridge and a Drum Unit – Printer Guides and Tips from LD Products