Paper Height Detection
The amount of paper in the tray is detected by the combination of on/off signals from two paper height
sensors [A] and [B].
When the amount of paper decreases, the bottom plate pressure lever [C] moves the actuator up.
The following combination of sensor signals is sent to the copier/printer.
Amount of Paper
Paper Height Sensor 1
Paper Height Sensor 2
Near End
OFF
ON
30%
ON
ON
70%
ON
OFF
100%
OFF
OFF
When the tray contains paper of a small width, the paper feed pressure may become too low when the
thickness of the remaining stack of paper has decreased. The lift motor rotates forward 300 ms after the
sensor detects a certain amount of paper remaining in the tray to increase paper feed pressure,
simulating the pressure generated by a full tray.
3. Detailed Section Descriptions
24
Summary of Contents for D699
Page 1: ...Paper Feed Unit PB2010 Machine Code D699 Field Service Manual December 2012 Subject to change ...
Page 2: ......
Page 4: ...Paper Size Detection 25 Side and End Fences 27 Side Fences 27 End Fence 27 2 ...
Page 6: ...1 Paper Feed Unit PB2010 D699 4 ...
Page 15: ...Electrical Components 13 ...
Page 16: ...2 Replacement and Adjustment 14 ...
Page 18: ...Electrical Component Layout 3 Detailed Section Descriptions 16 ...
Page 30: ...MEMO 28 EN ...