12. RADF (Sensor)
No. Name Type Function, operation Contact point, output
1 DFD Document feed sensor Reflection sensor Becomes H level when the leading
edge of document reaches the
resist roller.
H level when document is detected.
2 DTD Document timing sensor Reflection sensor Becomes H level when the leading
edge of document reaches near the
transport belt.
H level when document is detected.
3 RDD Reversion sensor Reflection sensor Becomes H level when the leading
edge of document is transported to
reversion/paper exit path.
H level when document is detected.
4 DED Document end sensor Photo interrupter Detection of last paper in tray H level when document is detected.
5 DWVR Document width knob Slide knob Detection of document width on tray
(judged by resistance value)
H level when document is detected.
6 DLS1 Document length sensor 1 Photo interrupter Detection of document length on tray H level when document is detected.
7 DSS Document setting sensor Photo interrupter Detection of document set on tray H level when document is detected.
8 DFMRS Paper feed motor rotation sensor Photo interrupter Detection of paper feed motor speed Pulse output
9 DWS Document width sensor Photo interrupter Detection of document width L level when document is detected.
10 AUOD ADF open/close switch Microswitch Detection of ADF unit operation L level when closed
11 FGOD Paper feed guide switch Microswitch Detection of paper feed guide
operation
L level when closed.
12 TGOD Reflection guide switch Microswitch Detection of reversion cover
operation
L level when closed.
1.DFD
2.DTD
3.RDD
4.DED
5.DWVR
6.DLS1
7.DSS
8.DFMRS
9.DWS
10.AUOD
11.FGOD
12.TGOD
4 – 14
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