Brother DCP-J925DW, Service Manual

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2-5 Confidential
2.3 Parts Names and Functions
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Document scanning and feeding
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Printing and paper feeding
Names Functions
Document detection actuator This detects whether documents are set on the document tray.
Document pick-up roller This pulls documents loaded in the document tray into the ADF.
Document separation roller and
separation rubber These feed document pages (drawn in by the document pick-up
roller) one at a time to the document feed roller 1.
Document feed roller 1 This feeds a document to the scanning start position. It also ejects
the scanned document onto the document cover.
Document scanning position
actuator This detects the leading edge of document pages, indicating the
scanning start position.
This also detects paper jams in the ADF.
Document feed roller 2 This feeds the scanned document to the document feed roller 1.
Names Functions
Paper pull-in rollers These rollers pull in recording paper from the paper tray.
Registration actuator This detects the leading and trailing edges of recording paper for
indicating the printing start position and for judging the paper size,
respectively.
This also detects paper jams in the rear section of the machine.
Paper feed roller This stops its rotation so that the leading edge of recording paper
comes into contact with the roller for alignment (registration).
After registration, this roller rotates to feed the recording paper to
the printing start position.
In disc printing, this roller feeds the disc tray.
Pressure roller release actuator In disc printing or in printing on glossy paper, this detects whether
the pressure roller is released.
Paper ejection roller This feeds printed recording paper to the switchback roller.
In disc printing, this roller feeds and ejects the disc tray.
Switchback roller This ejects recording paper to the paper ejection tray.
In duplex printing, after feeding recording paper printed on its first
side by the specified amount, this roller reverses to feed the paper to
the DX chute.
DX roller In duplex printing, this roller feeds recording paper passing through
the DX chute, to the paper feed roller.