Samsung CLX-6220FX, Service Manual

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Product Specification and feature
Service Manual
2-38
Samsung Electronics
2.4.5 Fuser Unit
This unit consists of HEAT and PRESSURE ROLLER, Thermostats and a Thermistor, etc. The fuser unit
uses a combination of heat and pressure to fuse the toner on to the copy paper.
- Fusing Type : [Dual Lamp Heating, 700W/500W]
- Heat Roller : Teflon Type (Lamp Inside)
- Pressure Roller
- Thermistor – Temperature Detecting Sensor
contact thermistor 2EA
- Thermostat – Overheat Protection Device
1. Thermostat
When a heat roller 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 generated from the lamp to fuse the toner on to the paper. The surface of a
heat roller is coated with Teflon, to help prevent toner from sticking to the surface.
3. Pressure roller
A pressure roller mounted under a heat roller is made of a silicon resin, and the surface is coated with Teflon.
When a paper passes between a heat roller and a pressure roller, a combination of heat and pressure fuses
the toner to the print media.
Trouble Temperature Control concept
Open Heat Error 90 ℃ below for 20 sec after power on
Over Heat Error
(Fuser High Error) - 240 ℃ over for 5sec
- 230 ℃ over for 5sec
- 10 ℃ over than Standby Ref.(170 ℃ ) Over for 3min.
Low Heat Error
(Fuser Low Error) 10 ℃ below than target Temp. for 15 sec. At Warm up
20 ℃ below than target Temp. for 15 sec. At Printing