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Paper Feed / Transport Section
By-pass feed paper size detection
Paper size width detection is performed by the by-pass feed size switch (rotary switch).
The by-pass feed size switch has a rotation plate which rotates together with the side fence of the by-
pass feed table, and detects the paper size.
Paper portrait/landscape is determined by the length sensor.
Two feelers [A] for the bypass paper length sensor [B] are added to the rear of the tray to prevent false
detection of paper length caused by floating at the rear of paper when long paper is set without pulling
out the bypass tray extension.
By-pass feed paper end detection
To detect by-pass feed paper end, a paper detection feeler and by-pass feed paper end sensor are
provided.
When the paper is set, the by-pass feed paper end sensor switches ON (interrupt), and paper set is
detected.
When there is no more paper, the detection feeler falls into a hole in the by-pass feed table, the by-pass
feed paper end sensor switches OFF (pass), and paper end is detected.
By-pass paper feeder drive
The paper feed roller, Reverse roller and pick-up roller are driven by the duplex/by-pass feed motor.
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Troubleshooting
