Brother HL-2600CN Service Manual page 340

I-14 Toner Drop
Phenomenon
Toner spot stain is caused on the print by toner dropping within the printer engine as
shown in print sample (14) of
Main Causes
1) Toner drops onto the transfer drum 2 due to the breakdown of the waste toner feeder.
1-1) Mylar of the waste toner feeder is deformed.
1-2) Waste toner is not properly collected by the waste toner feeder.
Toner drop
2) Toner adhering to the developer roller drops on the OPC belt .
Countermeasures
1) Check the cleaning brush and waste toner feeder.
1-1) Clean the perimeter of the cleaning brush installation location.
1-2) Check if the seal is deformed or damage. If there is any deformation or damage,
replace the waste toner feeder with a new one.
1-3) Check if waste toner is stuck in the printer engine. Remove the waste toner with a
vacuum cleaner designed to manage toner.
2) Remove the toner cartridge.
2-1) Clean the surface of the developer roller.
2-2) Replace the toner cartridge with a new one.
Fig.8-2.
Drum cleaner 2
Cleaning brush
Fig.8-9
Mylar
Waste toner feeder