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IV. PAPER'TRANSPORT
SYSTEM
A. Paper Pick-up Assembly and
Feeder
1.
&line
When
the pi'ck-up
clutch
solenoids
(SLl,
SL6) engage,
the main motor
(Ml)
turns
the roller,
feeding
a sheet
of copy
paper to the registration
rollers. The number
of rotations
of the pick-up roller varies with
the fength of the copy paper.
The
copy
paper
is
fed
by
the
registration
rollers so that its leading edge is
in line with the leading
edge of the toner
image on the photosensitive
drum. It then
passes
through
the transfer,
separation,
feed, fixing and delivery
stages to the copy
tray.
The copy
paper
is sensed
by paper
sensors
(Q2, Q5). If it does not reach or
pass the sensors within the specified period,
the DC controller PCB judges that a jam has
occurred
and causes the JAM indicator
on
the control panel to flash.
Cassette
paper
sensors
(Q6,
Q7)
senses
whether
there
is paper
in the
cassette.
If there
is not, the CASSETTE
PAPER
EMPTY
signals
(UCPD,
LCPD)
becomes
'O', causing
the ADD
PAPER
indicator on the control panel to go ON.
Pick-up
roller
f---w
Control ring
Figure 3-34
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