Minolta MAGICOLOR 2 Manual page 152

1 With the printer's front and top covers open, rotate up the
lock levers at each end of the OPC belt cartridge slot, and lift
the cartridge out of the printer.
2 Replace the protective sheet around the OPC belt cartridge
and the tension release pin on each side.
Insert the pin until you feel some resistance, move it forward
(toward the silver corona unit), and then slide it in the rest of the
way. The tension-release pins protect the belt and its cleaning
blade by relieving tension during movement.