Canon Paper Deck-AF1 Service Manual page 32

2
Technology > Controls > Compartment Block > Remaining Paper Level Detection Control
■
Cassette Heater (Option) Control
To facilitate separation of paper in a high humidity environment, a cassette heater unit
is available optionally. When the cassette heater (CHT201, CHT301) is powered, the
temperature in the deck becomes suitable and thereby the humidity lowers, facilitating
separation of paper. When the cassette heater switch mounted at the rear of this equipment
is set at OFF, the cassette heater (CHT201, CHT301) is not powered. When the cassette
heater switch is set to ON, the cassette heater is continuously powered.
.
MEMO:
The cassette heater (CHT201, CHT301) can only be mounted in the middle and lower
decks because the upper deck can be warmed by these decks.
2 Technology > Controls > Compartment Block > Remaining Paper Level Detection Control
Cassette heater(middle deck)
（CHT201）
Cassette heater(lower deck)
（CHT301）
F-2-20 F-2-20
■ Remaining Paper Level Detection Control
The level of the paper remaining in the deck is detected by counting the lifter motor (M101,
M201, M301) pulses that represent the distance of movement of paper from the lifter HP
sensor (S111, S211, S311) to the paper surface sensor (S104, S204, S304).
The count is updated during ascension of the lifter during pickup operation.
The count is reset at power-on, where the power is turned on or the deck is opened to turn on
the HP sensor (S111, S211, S311).
The remaining paper level is indicated on the display on the host machine.
MEMO:
Remaining paper level detection control is performed in the same manner for all decks.
Lifter HP sensor detection signal
Lifter moter drive signal
Paper sueface sensor detection signal
S111
S211
S311
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S104
S204
S304
M101
M201
M301
F-2-21 F-2-21
17