2PV/2PW
2-1-11
2-1-4 Optical section
The optical section consists of the image scanner section for scanning and the laser scanner section for print-
ing.
(1) Image scanner section
The original image is illuminated by the LED and scanned by the CCD image sensor in the CCD PWB (CCD-
PWB) via the five mirrors and ISU lens, the reflected light being converted to an electrical signal.
If a document processor is used, the image scanner unit stops at the position of the DP contact glass and
scans sequentially one row of the image on the original in synchronization with the moving timing of the origi-
nal in the sub scan direction by driving the DP.
Figure 2-1-11 Scanner unit
1. Contact glass
2. DP contact glass
3. Original size indicator plate
4. ISU top frame
5. ISU bottom frame
6. ISU belt
7. ISU shaft
8. Image scanner unit (ISU)
9. Home position sensor (HPS)
10. ISU motor (ISUM)
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