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2-4
Paper size detecting sensor
S1
S2
S4
Ledger/A3
ON
OFF
ON
Legal/B4
ON
ON
ON
Letter/A4
ON
OFF
OFF
Letter-R/A4R
OFF
ON
OFF
Invoice/A5
OFF
OFF
OFF
3)
Detecting the paper
• Paper in the sheet bypass tray is detected by the sheet bypass paper detecting
sensor. When paper is detected, the paper detecting sensor is turned off and
when no paper is detected, the sensor is turned on.
4)
Detecting sheet bypass paper size
• The paper size for the sheet bypass is detected by a matrix of sheet bypass
paper size sensors which are installed on the sheet bypass tray.
• When setting the paper in the sheet bypass tray and adjusting the paper guide,
the matrix is as follows.
S1/S2
S4
Middle
roller
(upper)
Middle roller (lower)
Sheet
bypass
unit
Middle
gear
Main motor
Pulley 2
Pulley 1
Middle
roller
clutch
Clutch
Middle gear
Registration
roller gear
Registration
roller clutch
Paper pass
sensor
Cleaning sheet
DFP roller
Paper feed roller
Pick-up roller
Clutch gear
Paper
detecting
sensor
Registration
roller