Canon PD-82, Руководство по обслуживанию

Страница: 20 / 88

II. PICK-UP/FEED SYSTEM
A. Outline
The paper in the paper deck is detected by the tray paper-out sensor (PS3). The paper level in
the tray is detected by a combination of outputs from paper-level detection switch 1 (SW601)
and paper-level detection switch 2 (SW602). The paper size is detected by a combination of
outputs from paper size detection switches (SW701 to SW704). The combinations of paper-
level detection switches and paper size detection switches are listed in Table 2-2-1.
When the option controller sends a pick-up command to the paper deck, the paper deck
driver runs the pick-up motor (SPM3) which rotates the pick-up roller, feed roller 1 and
separation roller.
At the same time, the paper deck driver turns ON the pick-up solenoid (SL1). This lowers
the pick-up roller to the print paper surface. As the pick-up roller turns, the paper is fed to the
paper feed unit.
The paper passes through the registration paper sensor (PS1) and stops when it touches the
registration roller. When the registration clutch (CL1) turns ON, the paper is fed to the printer.
There are two photointerrupters (PS1 and PS2) in the paper path to detect paper. If the
paper does not reach or pass through each sensor within the prescribed period of time, the
paper deck driver assumes that a paper jam has occurred, stops the operation, and reports the
jam to the option controller.
Table 2-2-1
2 - 4
CHAPTER 2
SW601
OFF
ON
ON
OFF
SW602
OFF
OFF
ON
ON
Paper-level detection switch
100
75
50
25
Remaining
paper %
SW701
OFF
ON
OFF
OFF
OFF
ON
OFF
SW702
ON
ON
OFF
ON
ON
ON
OFF
SW703
OFF
OFF
ON
ON
OFF
OFF
OFF
SW704
OFF
OFF
OFF
OFF
ON
ON
OFF
Paper-size detection switch
Paper size
Ledger
A3
B4
Legal
Letter (horizontal)
A4 (horizontal)
Tray open