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2-3
B022/B027
2.1.3 ORIGINAL SIZE DETECTION IN PLATEN MODE
In the optics cavity for original size detection, there are four reflective sensors in
the 115V machines ([A] and [B]), and six reflective sensors in the 230V machines.
The original width sensors [A] detect the original width, and the original length
sensors [B] and [C] detect the original length. These are the APS (Auto Paper
Select) sensors. Each APS sensor is a reflective photosensor.
While the main switch is on, these sensors are active and the original size data is
always sent to the CPU. However, the CPU checks the data only when the platen
cover sensor [D] is activated. This is when the platen is positioned about 15 cm
above the exposure glass, for example while it is being closed. The CPU can
recognize the original size from the combination of on/off signals from the APS
sensors.
If the copy is made with the platen fully open, the CPU decides the original size
from the sensor outputs when the Start key is pressed.
B027D554.WMF
[A]
[B]
[C]
[D]
Summary of Contents for B022
Page 1: ...B022 B027 SERVICE MANUAL 001197MIU RICOH GROUP COMPANIES...
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Page 3: ...B022 B027 SERVICE MANUAL RICOH GROUP COMPANIES...
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Page 5: ...B022 B027 SERVICE MANUAL 001197MIU...
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Page 37: ...OVERALL MACHINE INFORMATION...
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Page 59: ...DETAILED SECTION DESCRIPTIONS...
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Page 131: ...INSTALLATION...
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Page 190: ...SERVICE TABLES...
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Page 270: ...PREVENTIVE MAINTENANCE...
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Page 276: ...REPLACEMENT AND ADJUSTMENT...
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Page 328: ...TROUBLESHOOTING...
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Page 352: ...PAPER TRAY UNIT A860 B390...
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Page 376: ...LCT A862 B391...
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Page 398: ...AUTO REVERSE DOCUMENT FEEDER B386...
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Page 430: ...INTERCHANGE UNIT B300 B416...
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Page 438: ...1 BIN TRAY UNIT A898 B413...
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Page 446: ...SHIFT TRAY UNIT B313 B459...
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Page 456: ...BY PASS A899 B415...
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Page 466: ...DUPLEX A896 B414...
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Page 480: ...BRIDGE UNIT A897 B417...
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Page 490: ...1 000 SHEET FINISHER B408...
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Page 518: ...500 SHEET FINISHER G302 B442...
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Page 542: ...FIRMWARE HISTORY...
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Page 550: ...PRINTER SCANNER CONTROLLERS B453 B461...
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Page 592: ...FAX UNIT B418...
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Page 734: ...TECHNICAL SERVICE BULLETINS...
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Page 763: ...FIRMWARE HISTORY...