Function Of Each Sensor/Roller - Brother DCP-J552DW Service Manual

2.3

Function of Each Sensor/Roller

■ Document scanning
Part Name
Document detection actuator
Document pick-up roller
Document separation roller,
ADF separation pad
Document feed roller 1
Document scanning position actuator
Document feed roller 2
■ Printing part
Part Name
Paper pull-in roller
Registration actuator
Paper feed roller
Pressure roller release actuator
Paper ejection roller
Switchback roller
Duplex paper feed roller
This detects whether documents are loaded on the document tray.
This pulls documents loaded in the document tray.
This separates documents sent through the document pick-up
roller into individual sheets.
This feeds a document to the CIS unit.
This detects the leading edge of document pages, indicating the
scanning start position.
This detects paper jamming in the ADF.
This ejects the scanned document to ADF ejection tray support.
This feeds the recording paper from the paper tray.
This detects the leading edge of the recording paper and controls
the print start position.
This controls disc tray position during disc printing.
This detects the trailing edge of the recording paper and
determines the recording paper size.
This detects paper jamming in the rear.
This corrects the inclination of the recording paper when its
leading edge hits the stopped paper feed roller.
After the correction, the paper feed roller rotates and the
recording paper is fed to the print start position.
This feeds the disc tray during disc printing.
In disc printing, this detects whether the pressure roller is
released.
This feeds printed recording paper to the switchback roller.
This pulls in and ejects the disc tray during disc printing.
This ejects the recording paper to the paper ejecting tray.
During duplex printing, the front of the recording paper is
printed on, then after it is fed from the switchback roller to some
extent, it is rotated backwards and fed to the DX chute.
This feeds the recording paper, which passes through the DX
chute, to the paper feed roller during duplex printing.
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Function
Function
Confidential