NEAR END/END DETECTION
B391 8
SM
2.4 NEAR END/END DETECTION
This tray can hold two stacks of paper, so the machine needs to monitor the status
of both these stacks. There are seven sensors to do this.
In the right tray (paper feed side), three height sensors measure the height of the
stack, and an end sensor detects when all the paper is used up. As the amount of
paper remaining in the tray decreases, the base plate rises and the actuator
activates the paper height sensors. When paper runs out in the right tray, the stack
in the left tray is moved across to the right tray.
There are also two height sensors ([F] in the diagram on the previous page) and an
end sensor in the left tray (paper storage side) ([G] in the diagram on the previous
page). When there is no paper in both trays, paper end is detected.
The machine determines the amount of remaining paper based on the sensor
outputs, as shown in the following table.
Paper end sensor 1:
= Low (no paper),
= High (paper present)
Other sensors:
= Low (paper present),
= High (no paper)
Amount of paper
100%
75%
50%
Paper Height Sensor 1
Paper Height Sensor 2
–
Paper Height Sensor 3
– –
–
Paper End Sensor 1
Paper Height Sensor 4
Paper Height Sensor 5
Paper End Sensor 2
Amount of paper
25%
Near-end
End
Paper Height Sensor 1
–
Paper Height Sensor 2
–
–
– – –
Paper Height Sensor 3
–
–
–
– – – –
Paper End Sensor 1
Paper Height Sensor 4
Paper Height Sensor 5
Paper End Sensor 2
The following diagram is the sensor layout, as viewed from the front.
Paper Storage Side
Paper Feed Side
Paper Height
Sensor 5
Paper Height
Sensor 4
Paper End
Sensor 2
Paper End
Sensor 1
Paper Height
Sensor 1
Paper Height
Sensor 2
Paper Height
Sensor 3
B391D112.WMF
Summary of Contents for D017
Page 1: ...D017 D018 D019 D020 D084 D085 SERVICE MANUAL 003320MIU...
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Page 33: ...PRODUCT INFORMATION REVISION HISTORY Page Date Added Updated New None...
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Page 51: ...Copier Installation D017 D018 D019 D020 D084 D085 2 5 SM Installation...
Page 175: ...PREVENTIVE MAINTENANCE REVISION HISTORY Page Date Added Updated New None...
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Page 179: ...REPLACEMENT AND ADJUSTMENT REVISION HISTORY Page Date Added Updated New None...
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Page 206: ...Photoconductor Unit PCU SM 4 26 D017 D018 D019 D020 D084 D085 6 Drum E White clip x1 F...
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Page 293: ...TROUBLESHOOTING REVISION HISTORY Page Date Added Updated New None...
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Page 299: ...Self Diagnostic Mode D017 D018 D019 D020 D084 D085 6 5 SM Trouble Shooting...
Page 303: ...Image Problems D017 D018 D019 D020 D084 D085 6 9 SM Trouble Shooting...
Page 309: ...Image Problems D017 D018 D019 D020 D084 D085 6 15 SM Trouble Shooting...
Page 323: ...ENERGY SAVING REVISION HISTORY Page Date Added Updated New None...
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Page 333: ...D017 D018 D019 D020 D084 D085 SERVICE MANUAL APPENDICES...
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Page 364: ...APPENDIX PM TABLES APPENDIX 2 PM TABLES REVISION HISTORY Page Date Added Updated New None...
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Page 731: ...Covers SM 3 B793 Booklet Finisher B793 3 Remove the upper left cover C...
Page 745: ...Folder SM 17 B793 Booklet Finisher B793 6 Remove a connector 7 7 Remove 2 screws 8...
Page 746: ...Folder B793 18 SM 8 Remove the staple tray 9 9 Remove the guide 10 2 screws...
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Page 1043: ...ARDF DF3030 D366 ARDF DF3030 REVISION HISTORY Page Date Added Updated New None...
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Page 1075: ...1 BIN TRAY BN3030 D367 1 BIN TRAY BN3030 REVISION HISTORY Page Date Added Updated New None...
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Page 1085: ...BRIDGE UNIT BU3020 D368 BRIDGE UNIT BU3030 REVISION HISTORY Page Date Added Updated New None...
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Page 1097: ...DUPLEX UNIT AD3000 D369 DUPLEX UNIT AD3000 REVISION HISTORY Page Date Added Updated New None...
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Page 1112: ...Electrical Component D369 8 SM 4 Duplex transport motor B x 2...
Page 1121: ...BYPASS TRAY BY3000 D370 BYPASS TRAY D370 REVISION HISTORY Page Date Added Updated New None...
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Page 1128: ...Tray D370 2 SM 2 Remove the pins A x 1 each 3 By pass tray B x 1...
Page 1133: ...Feed SM 7 D370 Bypass Tray BY3000 D370 6 Separation pad D spring x 1...
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Page 1176: ...Overview D372 20 SM No What Happens sure that the stapler is at its home position...
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Page 1254: ...Scanner Service Tables D383 6 SM Compression Notch Assignment...
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