Fuser Unit - Samsung CLP-670N Service Manual

2.4.9 Fuser Unit

This unit consists of HEAT ROLLER, Thermostats and a Thermistor, etc. It melts and fuses the toner,
transferred by the transfer roller onto the paper, by applying pressure and high temperature to complete
printing job.
- Fusing Type : [Dual Lamp Heating, 700W/500W]
- Heat Roller : Pipe Type (Lamp Inside)
- Pressure Roller
- Thermistor – Temperature Detecting Sensor
contact thermistor 2EA
- Thermostat – Overheat Protection Device
1. Thermostat
When a heat lamp is overheated, a Thermostat cuts off the main power to prevent over-heating.
- Non-Cotact type Thermostat
2. Heat roller
The heat roller transfers the heat from the lamp to apply a heat on the paper. The surface of a heat roller is
coated with Teflon, so toner does not stick to the surface.
3. Pressure roller
A pressure roller mounted under a heat roller is made of a silicon resin, and the surface also is coated with
Teflon. When a paper passes between a heat roller and a pressure roller, toner adheres to the surface of a
paper permanently.
Trouble
Open Heat Error
Over Heat Error
(Fuser High Error)
Low Heat Error
(Fuser Low Error)
Service Manual
Product spec and feature
Temperature Control concept
90℃ below for 20 sec after power on
- 240℃ over for 5sec
- 230℃ over for 5sec
- 10℃ over than Standby Ref.(170℃) Over for 3min.
10℃ below than target Temp. for 15 sec. At Warm up
20℃ below than target Temp. for 15 sec. At Printing
2-30
Samsung Electronics