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OPERATIONS
AND
TIMING
C.
Scanner
Drive
System
1.
Outline
The
scanner
is
driven
by
the
scanner
motor
(M2).
The
direction
of
rotation of
the
scanner motor determines whether
the
scanner
moves
forward
or
backward.
The
forward
speed
of
the
scanner motor
is
continuously
variable
to
produce
the
required reproduction
ratio.
The
reverse
Mirror
2
mount
Mirror
1
mount
speed
is
fixed
regardless
of
the reproduction
ratio (2.5
times
the
forward
speed
for
DIRECT
copying).
The
distance
that
the
scanner
moves
varies
to suit
the size
of
copy paper and
the
reproduction
ratio.
The
control
panel displays 'E202'
in
response
to
an
error
in
the
scanner motor
(M2)
or
the
scanner
home
position
sensor
{03).
Scanner
home
position
sensor
(Q3)
Figure 3-12
3-14
COPYRIGHT©
1992
CANON
INC.
CANON,
NP-1550
REV.1
SEPT. 1992
PRINTED
IN
JAPAN (IMPRIMEAUJAPON)
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