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SUMMARY OF PRODUCT
Samsung Electronics
Service Manual
4.2 System Layout
4.2.1 Feeding section
There is the universal cassette, which automatically loads paper and the manual feeder, which supplies
paper one by one. The cassette has the friction pad which separates paper one by one, and it has a sen-
sor, which functions to check the existence of loaded paper.
- Feeding Method: Universal Cassette Type
- Feeding Standard: Center Loading
- Feeding Capacity: Cassette-250 sheets (75g/m
2
, 20lb paper standard)
Manual 1 sheet (Paper, OHP, Envelop, etc.)
- Paper detecting sensor: Photo sensor
- Paper size sensor: None
4.2.2 Transfer Ass’y
It consists of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL sends a light to the OPC drum,
drops the current on the drum surface and improves the transfer efficiency.
The transfer roller transfers toner from the OPC drum surface to the paper.
- The life span: Print over 60,000 sheets (in 15~30°C)
4.2.3 Driver Ass’y
- Gear driven power unit. By driving the motor, it supplies power to the feeding unit, the fusing unit, and the
distributing unit.
4.2.4 Fixing Part(Fuser)
- The fuser consists of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It adheres
toner to the paper with pressure and a heat to complete the printing job.
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 to the surface to heat the paper which passes
the surface. The melted toner cannot stain the heat roller coated with Teflon.
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.
4.2.4.5 Safety Relevant Facts
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