Samsung ML-1640 Service Manual page 94

3) Horizontal Black Band
• Description Dark or blurry horizontal stripes occur in the printing periodically.
(They may not occur periodically.)
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Bad contacts of the voltage
Service Manual
Alignment & Troubleshooting
terminals to developer.
2. The rollers of
developer may be stained.
OPC Drum = 75.5mm OPC Drum = 75.5mm OPC Drum = 75.5mm
Charge Roller = 37.7mm Charge Roller = 37.7mm
Supply Roller = 47.5mm Supply Roller = 47.5mm Supply Roller = 47.5mm
Develop Roller = 35.2mm Develop Roller = 35.2mm Develop Roller = 35.2mm
Transfer Roller = 46.2mm Transfer Roller = 46.2mm ransfer Roller = 46.2mm
Heat Roller = 63.9mm Heat Roller = 63.9mm Heat Roller = 63.9mm
Pressure Roller = 75.4mm Pressure Roller = 75.4mm Pressure Roller = 75.4mm
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.
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Samsung Electronics