Canon LaserBase MF8180C, Service Manual

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Chapter 2
2-2
F-2-2
T-2-3
Reading from the ADF
To avoid skew feeding, documents loaded on the document tray are retained in the horizontal direction by the slide guide. Then, the documents are fed to the sep-
aration roller by the pickup roller, and separated one sheet each using differences in the coefficient of friction among the separation roller, documents, and separation
guide.
After that, the feeder roller feeds the document onto the reading glass, and the CCD unit reads out image data of the document; then, the delivery roller delivers it
to the output tray.
The document feed motor drives the various rollers of the ADF.
Reading from the platen glass
The CCD unit driven by the flatbed motor reads out image data of a document on the platen glass.
2.1.2 Basic Sequence
2.1.2.1 Basic Sequence of Operation at Power-on
0008-2930
Basic Sequence of Operation at Power-On
F-2-3
[1] Document feed motor [3] CCD unit
[2] Flatbed motor
[3]
[1]
[2]
STBY SREADY
reader motor
scanning lamp
HP sensor
:motor forward
:motor reverse
:HP sensor ON
:scanning lamp ON
black shading correction*1 lamp warm-up*2 gain correction*3
main/sub scanning read position adjustment
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