Samsung ML-1665 Service Manual page 74

3) Horizontal Black Band
Description : Dark or blurry horizontal stripes occur in the printing periodically.
(They may not occur periodically.)
Service Manual
Alignment and Troubleshooting
1. Bad contacts of the voltage
terminals to developer.
2. The rollers of
developer may be stained.
Opc drum = 62.9mm
Developing Roller = 35.1mm
Charging Roller = 26.7mm
Supply Roller = 47mm
Transfer Roller = 39.2mm
Pressure Roller = 75.4mm
Fusing Roller = 77.5mm
Clean each voltage terminal of the
Charge, Supply, Develop and
Transfer roller.(remove the toner
particles and paper particles)
1. Clean the right Gear that has
relatively small gap of the teeth
in the OPC.
2. If the malfunction persists,
replace the developer.
4-26
Samsung Electronics