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2. Sequence of Operations
Thick Paper Mode, A4/LTR, 2 Copies, 4Color, Direct, Cassette 1
DSRDY (scanner ready)
CNTR (control rotation)
COPY (copy)
LSTR (last rotation)
The machine's scanner becomes ready for operation when the temperature of the fixing roller reach-
l
es a specific value so that the image of the original may be read in response to a press on the Copy
Start key. Writing of the image on the surface of the photosensitive drum becomes ready when the
image signals have been stored in memory. (Image formation starts in relation to a registration slg-
nal.)
Control in relation to signals other than the registration signal is discussed using separate timing
charts.
3-28
DSRDY
CNTR
Figure 3-127
Period
From when the Copy Start
key is pressed until pre-
scanning ends.
From the end of DSRDY
until copy paper is drawn for
retention.
From when copy paper
starts to wrap around the
transfer belt until all toner
has been transferred to the
copy paper.
end of
until
From the
COPY
the main motor stops.
Table 3-102
COPY
Purpose
Executes scanning for an
original and shading correc-
tion.
Measures and controls the
drum surface potential. Picks
up copy paper.
Turns ON/OFF the laser
according to video signals,
and develops and transfers
specific colors.
Discharges copy paper.
Stabilizes the photosensitive
drum sensitivity. Removes
charges from the transfer
belt, and cleans the drum.
CANON CLCl 990 REV.1 MAY 1997 PRINTED IN JAPAN (IMPRIME AU
LSTR
Remarks
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