Service Manual
Summary of Product
4-8
Samsung Electronics
4.2.4.4 Pressure roller
The Pressure Roller mounted under the heat roller, it is made of a silicon resin, and the surface of the roller is
coated with Teflon. This ensures that toner does not adhere to the roller surface.
4.2.4.5 Safety Features
• 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.
4.2.5 Scanner
This image is read using a photosensitive sensor. It consists of a CCD module, Connection board, ADF board,
AFE (Analog Front End), Image Processor (Located in CPU), platen glass and ADF mechanism.
• CCD Module Specification
1.Resolution: 600dpi/A4
2.Maximum scan wide: 8.5”
3.Color filter: Red, Green, Blue
4.Output channel: 3 channels (R, G, B)
5.Effective pixel: 5,400 pixel *3
6.Voltage: 24V & 5V
7.Pre-heating time: Maximum 30 seconds (70% of light output reached)
8.The life span of a lamp: 30,000 hours (25
o
C)
• Image Processor Specification
1.Operating frequency: 66MHz
2.Image sensor interface: 200/300/600 dpi CIS or CCD
3.Line time: Copy, FAX, Binary (Lineart, Halftone) PC Scan: 1.5ms/Line Color PC Scan (Grey, 256 Color,
True Color): 4.5ms/Line
4.A/D conversion: 10bit conversion
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