Large
Capacity Tray
B543
TRAY LIFT AND PAPER HEIGHT DETECTION MECHANISM
SM 7 B543
2.2 TRAY LIFT AND PAPER HEIGHT DETECTION
MECHANISM
The lift motor [A] controls the vertical position of the tray bottom plate [B] through
gears and timing belts [C].
Tray lifting conditions
When the tray lift sensor [D] turns off in the following conditions, the tray lift motor
raises the tray bottom plate until the tray lift sensor [D] turns on again.
• Just after the main switch is turned on
• During copying
• Just after the tray cover is closed
• Just after leaving the energy saving mode
Tray lowering conditions
In the following conditions, the lift motor lowers the tray bottom plate until the lower
limit [E] sensor turns on.
• Just after the paper end sensor turns on
• Just after the down switch is pressed by the user
The amount of the paper in the tray is detected by combination of high/low outputs
from three sensors (paper height sensor 1 [F], 2 [G], and 3 [H].)
Amount of paper
Paper Height
Sensor 1
Paper Height
Sensor 2
Paper Height
Sensor 3
Near end On (High) Off (Low) Off (Low)
25% Off (Low) On (High) Off (Low)
50% Off (Low) On (High) On (High)
75% Off (Low) Off (Low) On (High)
100% Off (Low) Off (Low) Off (Low)
A683D501.WMF
[B]
[A]
[C]
[E]
[H]
[G]
[F]
[D]
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