Samsung SCX-82x0 series, Service Manual

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2. Product Description
SAMSUNG ELECTRONICS Service Manual
2-51
2.9.2 Scanning System Components
The following shows the construction and purpose of the scanning system:
1) DADF glass
The DADF glass is used when a document is read by the Automatic Document Feeder. The light from the
WLED is illuminated on the Document through this glass.
The document is transported on the DADF glass by the DADF operation.
Do not use such solvents, as alcohol when cleaning the surface of the DADF glass, as it is coated so as not
to be scratched by Document.
2) FR(Full Rate)-Module
FR-Module is consists of the White-LED , Light-Guide, mirror-1 etc.
It is driven by the scan motor (HB Step Motor) and moves across the document on the glass
• White-LED
This is a light source for scanning the document on the glass.
There are 4 White-LEDs. (Front 2 EA, Rear 2 EA)
• Light-Guide
This is to efficiently transfer the light creating White-LED to the surface of the document .
It made of the transparent Plastic Resin.
• Mirror-1
This mirror directs the light reflected from the Document to the mirror-2.