Samsung SCX-4100 Paper Feed Mechanism, Transfer Ass’y, Drive Ass’y, Fixing PartFuser

Summary of product

4.2.1 Paper Feed Mechanism

The printer has a universal cassette which automatically loads paper and a manual feed which supplies paper single sheet at a time. The cassette has a friction pad which separates paper to ensure single sheet feeding, and it has a sensor, which checks when the paper tray is empty.

-Feeding Method: Universal Cassette Type

-Feeding Standard: Center Loading

-Feeding Capacity: Cassette-250 sheets (75g/m2 , 20lb paper standard) Manual 1 sheet (Paper, OHP, Envelop, etc.)

-Paper detecting sensor: Photo sensor

-Paper size sensor: None

4.2.2Transfer Ass’y

This consists of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL shines a light onto the OPC drum. This lowers the charge on the drum’s surface and improves transfer efficiency.

The transfer roller transfers toner from the OPC drum surface to the paper.

-Life expectancy: Over 60,000 sheets (at 15~30°C)

4.2.3Drive Ass’y

A gear driven power unit. The motor supplies power to the paper feed unit, the fuser unit, and the toner cartridge.

4.2.4 Fixing Part(Fuser)

There are two types of fuser unit:

Q-PID type, developed by Samsung, and only used on 220V Domestic models Heat Lamp type used on 220V Export models and all 110V models.

The Heat Lamp type fuser consists of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It fixes toner to the paper using pressure and heat to complete the printing job.

4.2.4.1 Heat Lamp power cut-off (Thermostat)

The thermostat is a temperature sensing device, which cuts off the power to the heat lamp to prevent overheating fire when the heat lamp or heat roller overheats.

4.2.4.2 Temperature Detecting Sensor (Thermistor)

The Thermistor detects the surface temperature of the heat roller, this information is sent to the main processor which uses this information to regulate the temperature of the heat roller.

4.2.4.3 Heat Roller

The surface of the Heat Roller is heated by the Heat Lamp. As the paper passes between the Heat and Pressure rollers the toner is melted and fixed permanently to the paper. The surface of the roller is coated with Teflon. This ensures that toner does not adhere to the roller surface.

4.2.4.4 Pressure roller

The Pressure Roller mounted under the heat roller, it is made of a silicon resin, and the surface of the roller is tubed with Teflon. This ensures that toner does not adhere to the roller surface.

Service Manual

Samsung Electronics

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