Laser printer print defects - Dropouts

Problem	Possible Cause	Solution
dropouts	Failing toner cartridge, or wrong toner density setting	Replace toner cartridge, or wrong toner density setting
dropouts	Failing upper fuser roller in fuser	Replace fuser
dropouts	DC Controller is defective (low primary voltage)	Replace the DC controller
dropouts	High Voltage Power Supply is defective	Replace the high voltage power supply
dropouts	Transfer roller is defective	Replace the Transfer Roller