Samsung ML-1700 Feeding Part, Transfer Ass’y, Driver Ass’y, Fixing PartFuser, Heat Roller

S U M M A RY OF PRO D U C T

4.2.1 Feeding Part

There are the universal cassette, which loads papers, and the manual feeder, which supplies paper one by one. The cassette has the function pad which separates paper one by one, and it has the sensor function to check the existence of the loading paper.

-Feeding Method: Universal Cassette Type

-Feeding Standard: Center Loading

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

-Paper detecting sensor: Photo sensor

-Paper size sensor: None

4.2.2Transfer Ass’y

It is consisted of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL sends a light to the OPC drum, makes the current on the drum surface to low, and improves the transfer efficiency.

The transfer roller delivers the toner of the OPC drum to the paper.

-The life span: Print over 60,000 sheets (in 15~30°C)

4.2.3Driver Ass’y

It is a power delivery unit by gearing. By driving the motor, it supplies the power to the feeding unit, the fusing unit, and the distributing unit.

4.2.4 Fixing Part(Fuser)

-The fuser is consisted of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It adheres the toner to the paper with a pressure and a heat to complete the printing job.

-There are two methods, the existing method which use the Heat Lamp and the Q-PID which is developed by Samsung.

110V : Heat Lamp type Fuser

220V : Heat Lamp type or Q-PID type Fuser

4.2.4.1 Temperature-Intercepting Device (Thermostat)

The thermostat is the temperature-intercepting device, which cuts off the power for preventing an overheat- ing or a fire when the heat lamp or the heat coil of the heat roller is overheated.

4.2.4.2 Temperature Detecting Sensor (Thermistor)

The Thermistor detects the surface temperature of the heat roller, and it maintains the regular temperature of the heat roller by responding to the information of the temperature.

4.2.4.3 Heat Roller

The heat roller transfers the temperature from the heat lamp or heat coil to the surface to heat the paper which passes the surface. The melted toner cannot stain the heat roller coated with Teflon.

The heating elements are heat lamp and heat coil. For this product, Q-PID method with the heat coil is applied.

4.2.4.4 Pressure roller

The pressure roller mounted right under the heat roller is made of the silicon resin, and the surface of the roller is coated with Teflon to fuse the toner on the paper when paper passes between the heat roller and the pressure roller.

Service Manual

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Samsung Electronics