2LW/2LX
2-1-7
(2) Image scanner unit (ISU)
The original image is illuminated by the exposure lamp (EL) and scanned by the CCD image sensor in the
CCD PWB (CCDPWB) via the four mirrors and ISU lens, the reflected light being converted to an electrical
signal.
If a document processor (DP) 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
original in the sub scan direction by driving the DP.
Figure 2-1-10 Image scanner unit (ISU)
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3
4
2
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9
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12
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8
1. Lamp mount
2. ISU housing
3. ISU reflector
4. Exposure lamp (EL)
5. Mirror A
6. Mirror B
7. Mirror C
8. Mirror D
9. ISU lens
10. CCD PWB (CCDPWB)
11. Inverter PWB (INPWB)
12. Home position sensor (HPS)
13. ISU shaft
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