Scanner Unit - Samsung SCX-4200 Series Service Manual

System Overview
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.
5) Safety Relevant Facts
• To prevent overheating
- 1st protection device: Hardware cuts off when overheated
- 2nd protection device: Software cuts off when overheated
- 3rd protection device: Thermostat cuts off mains power to the lamp.
• Safety device
- Fuser power is cut off when the front cover is opened
- LSU power is cut off when the front cover is opened
- The temperature of the fuser cover's surface is maintained at less than 80ºC to protect the user and a
caution label is attached where the customer can see it easily when the rear cover is opened.

3.1.4.5 Scanner Unit

• Scan Image Controller
1.Scan Line Time : 1.63ms
2.Scan Resolution : Color : Max 600DPI
3.Scan Width : 216mm
4.Function
- White Shading Correction
- Gamma Correction
- CIS Interface
- 256 Gray Scale
• CIS Operating Part: CIS use +3.3V
- CIS Max Operating Freguency: 5MHz
Service Manual
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Samsung Electronics