Konica Minolta bizhub C25 - Manual (Page 332)

Technical Specifications 12-7
d
Whether printing in color or black and white, color printers consume a
small amount of each toner during the initialization operation when
the machine is turned on or off and during automatic adjustments to
maintain print quality. Even if an operating error occurred during
black-and white printing, color toner is consumed and may need to
be replaced.
Service-Replaceable
Item Average Life Expectancy
Media feed roller 300,000 pages