Brother International HL-2600CN Service Manual - Page 339
Toner Drop, Check the cleaning brush and waste toner feeder.
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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 Fig.8-2. 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. Drum cleaner 2 Cleaning brush Toner drop Mylar Waste toner feeder Fig.8-9 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.
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