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ADU
*5 Paper conveyance unit paper suction mecha-
nism
A paper suction duct is provided in the middle of
the paper conveyance and leads to the develop-
ing suction fan (FM2) installed at the back of the
main unit. To improve the paper transportability
in the paper conveyance unit, the paper suction
fan and duct are used to suck the paper passing
through the paper conveyance unit.
Conveyance unit
*6 Paper conveyance unit jam removal mechanism
When a paper jam occurs in the paper reversal
section in the ADU, the jammed paper can be
removed by opening the paper conveyance unit.
Paper conveyance unit
Suction hole
Duct
ADU paper
reversal section
2-N-4
*7
Paper path selection to paper reverse/exit sec-
tion
The paper gate determines whether the paper
fed out from the fixing unit is to be ejected
straight, or reversed and ejected. The paper gate
is operated by the ON/OFF operation of SD2
(paper reverse gate SD).
a) Paper reverse/exit operation
Normally, the paper gate opens when SD2 is
turned OFF. The paper fed by the paper reverse
/exit inlet roller is fed, through the path under
paper gate, into the paper reverse/exit section.
This paper is then fed to the ADU paper convey-
ance unit by paper reverse/exit rollers 1-3 (and
paper reverse roller, when feeding a large size
paper).
However, if PS57 (paper reverse) detects the
trailing edge of the paper and consequently turns
OFF, the rollers start rotating in the opposite
direction, feeding the paper back to the paper
gate. The fed back paper is fed to the paper exit
roller, not to the paper reverse/exit entrance roller
side, because of the shape of the paper gate.
Thus, the paper is ejected to the paper exit with
the print side down.
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