Operation Of Each Part - Brother DCP-7057 Service Manual

2.3

Operation of each part

■ Printer part
Part name
Pick-up roller
Separation roller and
Separation pad
Paper edge actuator
(With paper edge actuator
model only)
Registration front actuator
Registration roller
Registration rear actuator
Transfer roller
Heat roller and Pressure roller The toner transferred on paper being fused by heat and
Paper eject actuator
Eject roller 1
Eject roller 2
DX feed roller
(Duplex printing model only)
■ ADF part
Part name
Document detection actuator
Document pull-in roller
Document separation roller,
Separation rubber
Document feed roller
Document scanning position
detection actuator
Document ejection roller
Feed the paper from the paper tray.
Separate into single sheet from the paper tray.
Detect the rear edge of paper, and identify the paper size.
Detect the front edge of paper, and control the drive of
registration roller.
When feeding from the manual feed slot, detect the passage
of paper.
Detect the paper jam of front part.
When the front edge of the paper hit the stopped registration
roller and the inclination of the paper is corrected.
Detect the passage of paper and adjust the starting position
for writing on a sheet of paper.
When the duplex printing, detect the rear edge of paper and
adjust the timing of eject roller 2 switching.
By applying a minus charge to the transfer roller, the toner
adhered to the exposure drum is transferred to paper, and
feed the paper to the fuser unit.
pressure, and feed the paper to the eject roller 1.
Detect whether or not paper is ejected from the fuser unit.
Feed the paper ejected from the fuser unit to the eject roller 2.
Eject the paper to the face-down output tray.
When the duplex printing, after the paper is fed from the eject
roller 2 with the front of sheet printed, the eject roller 2 rotates
conversely and feed the paper to the duplex tray.
Feed the paper passed in the duplex tray to the registration
roller.
Detect the passage of the document set in the document tray.
Feed the documents set in the document tray.
Separate the documents fed by the document pull-in roller
one by one.
Feed the document to the CIS unit.
Detect the front edge of the document, and adjust the surface
reading position.
Detect the document jams inside the ADF.
Eject the document on the document cover after the surface
has been read.
2-8
Operation
Operation
Confidential