Read Sharp AL-840 (serv.man3) Service Manual online
3. Operations of each section
A. Paper feed, paper transport section
(1) Outline
The paper feed tray contains about 200 (250) sheets of paper.
The paper is passed to the transfer section by the paper feed roller.
The paper feed operation is controlled by the paper feed roller clutch
and the paper feed roller clutch solenoid. The paper feed clutch
employs the mechanical spring clutch.
and the paper feed roller clutch solenoid. The paper feed clutch
employs the mechanical spring clutch.
Paper mis-feed and paper jam are detected by the paper empty
sensor and the paper entry sensor. The paper size (width) is detected
by the paper size (width) detector to prevent toner from attaching to
the area over the paper width.
sensor and the paper entry sensor. The paper size (width) is detected
by the paper size (width) detector to prevent toner from attaching to
the area over the paper width.
(2) Major parts
2)
1) PE SENSOR
3)
4)
5) PUS
6)
7) PIN SENSOR
8)
11)
4)
9) PAPER SIZE SW
6)
12)
13)
14)
12)
8)
13)
15)
17)
16)
16)
18)
10)
19)
19)
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