Ricoh DD 5450, Руководство по обслуживанию на месте, Страница: 103 / 403

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101
Chapter 3 Scanner Section
When the document cover is opened at a certain angle, the
document cover open/close sensor changes to be in the state
of photopassing.
(3) Operation with the Document Cover Open / Closed
When the document cover is closed at a certain angle, the
document cover open/close sensor changes to be in the
state of photointerrupting.
The lamps light up.
The document size sensors detect the
document's length in the primary scanning
(vertical) and secondary scanning (horizontal).
When the ADF is installed, the document
size (primary scanning) is detect on ADF
side.
The optical system goes forward to read the
document density immediately before the
document image is read.
The area over which density is read is
determined according to the document size
read.
Glass Plate Document
Top edge of
Vertical size plate
Darkness sensing area
Approx.
2mm
1. Reading the Document Size
2. Reading the Document Density
1