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PAPER HEIGHT DETECTION
A860/B390
8-10
SM
2.4 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.
B390D107.WMF
[C]
[C]
[B]
[A]
Содержание B022
Страница 1: ...B022 B027 SERVICE MANUAL 001197MIU RICOH GROUP COMPANIES...
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Страница 3: ...B022 B027 SERVICE MANUAL RICOH GROUP COMPANIES...
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Страница 5: ...B022 B027 SERVICE MANUAL 001197MIU...
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Страница 36: ......
Страница 37: ...OVERALL MACHINE INFORMATION...
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Страница 59: ...DETAILED SECTION DESCRIPTIONS...
Страница 60: ......
Страница 131: ...INSTALLATION...
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Страница 190: ...SERVICE TABLES...
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Страница 270: ...PREVENTIVE MAINTENANCE...
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Страница 276: ...REPLACEMENT AND ADJUSTMENT...
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Страница 328: ...TROUBLESHOOTING...
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Страница 351: ......
Страница 352: ...PAPER TRAY UNIT A860 B390...
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Страница 375: ......
Страница 376: ...LCT A862 B391...
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Страница 398: ...AUTO REVERSE DOCUMENT FEEDER B386...
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Страница 430: ...INTERCHANGE UNIT B300 B416...
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Страница 438: ...1 BIN TRAY UNIT A898 B413...
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Страница 445: ......
Страница 446: ...SHIFT TRAY UNIT B313 B459...
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Страница 456: ...BY PASS A899 B415...
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Страница 466: ...DUPLEX A896 B414...
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Страница 480: ...BRIDGE UNIT A897 B417...
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Страница 490: ...1 000 SHEET FINISHER B408...
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Страница 495: ...MOTORS B408 17 4 SM 1 3 4 LOWER TRANSPORT MOTOR 1 Main PCB 1 1 2 Lower transport motor A x 2 x 1 B408R111 WMF A...
Страница 507: ...DRIVE LAYOUT B408 17 16 SM 7 Stack Feed out Motor 8 Jogger Motor 9 Stapler Motor B408D107 WMF 7 8 9...
Страница 518: ...500 SHEET FINISHER G302 B442...
Страница 519: ......
Страница 522: ...500 Sheet Finisher G302 B442 EXTERIOR SM 18 3 G302 B442 Right cover A Grounding plate 1 B Right cover 2 B442R103 WMF A B...
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Страница 542: ...FIRMWARE HISTORY...
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Страница 550: ...PRINTER SCANNER CONTROLLERS B453 B461...
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Страница 592: ...FAX UNIT B418...
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Страница 734: ...TECHNICAL SERVICE BULLETINS...
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Страница 763: ...FIRMWARE HISTORY...