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The followings are about sensors which detect paper size, availability of paper and position of the paper being transported to control ON/OFF of the rollers.

(6)Bypass paper sensor

This sensor detects if paper is set in the bypass tray. If it is, bypass feeding always comes before drawer feeding.

(7)Empty sensor (Upper/Lower drawer)

This is a transmissive-type sensor and detects the availability of paper in the drawer by using an actuator. When there is no paper in the drawer, the actuator blocks the light path of the sensor, and the sensor determines that there is no paper.

(8)Paper stock sensor (Upper/Lower drawer)

This is a transmissive-type sensor which detects the amount of the remaining paper in the drawer using an actuator. When the remaining paper is consumed and becomes around 100 sheets, the actuator blocks the light path for the transmissive-type sensor to notify that the paper is getting fewer.

(9)Feed sensor (Upper/Lower drawer and bypass feed)

This sensor detects if the leading edge or trailing edge of the paper has passed the feed roller. It also detects jamming such as misfeeding.

(10)Registration sensor

This sensor detects that the leading edge of the paper has reached the registration roller and the trailing edge of the paper has passed the registration roller.

e-STUDIO3511/4511 PAPER FEEDING SYSTEM

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November 2003 © TOSHIBA TEC

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Toshiba 3511, 4511 manual