Canon MultiPASS C530, Service Manual

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MultiPASS C530/C560 Chapter 2: Technical Reference
Initializing the upper document feed roller
When the separation roller starts to rotate, the position of the upper document feed roller
is simultaneously initialized to raise the document stopper. Initialization is carried out
when the power is turned ON, when documents are inserted and when documents are
ejected.
Document feed lever
Switching between automatic document feed and manual document feed is carried out
by the document feed lever above the left side of the LCD. During automatic document
feed, documents are gripped between the separation guide and the separation roller.
Switching the lever to manual document feed raises the separation guide and frees it
from the document. Manual document feed can therefore minimize the possibility of
damage caused by pinching between the separation guide and separation roller when
feeding documents such as thick-stock paper or photographs. However, because
document separation does not occur in manual document feed mode, only one sheet at a
time may be loaded. Loading multiple sheets will result in double feed.
Document feed error detection
There are three types of document feed errors which may occur.
a) Feed jam error
When the leading edge of the document is not detected by the document edge sensor
(DES) within 15 seconds after the start of document feed, a feed jam error is detected
and document feed is terminated.
b) Document extraction error
When a document is extracted after document feed has started but before the DES is
turned on, a document extraction error is detected, and feeding is terminated.
c) Eject jam/document too long error
When the trailing edge of the document is not detected within one meter of feeding
after the document’s leading edge is detected, an eject jam/ document too long error is
detected and feeding is terminated.
When one of these types of jams occurs, all data which have been read and stored in
memory (which are not part of a page that has already been completely transmitted or
copied) are erased.
NOTE