Brother FAX-2840 Service Manual

2-9
Confidential
2.3 Operation of Each Part
■ Printer part
■ ADF part
Part name Operation
Pick-up roller
Feed the paper from the paper tray.
Separation roller, separation pad Separate the paper fed from the paper tray into single sheets.
Registration front actuator Detect the front edge of paper, and control the drive of
registration roller.
Detect the paper pass when feeding from the manual feed slot.
Detect the paper jam at the front part of the machine.
Detect the paper size.
Registration roller Correct the paper alignment when the front edge of the paper
makes contact with the stopped registration roller. After
correction, the registration roller rotates to feed the paper to the
transfer roller.
Registration rear actuator Detect the paper pass and adjust the starting position for writing
on a sheet of paper.
Transfer roller Transfer the toner adhered to the exposure drum to the paper by
applying a minus charge, and feed the paper to the fuser unit.
Heat roller, pressure roller Fuse the toner transferred to the paper by heat and pressure,
and feed the paper to the eject roller 1.
Paper eject actuator Detect whether or not the paper is ejected from the fuser unit.
Eject roller 1 Feed the paper ejected from the fuser unit to the eject roller 2.
Eject roller 2 Eject the paper to the face-down output tray.
Part name Operation
Document detection actuator
Detect the document set in the document tray.
Document separate roller,
separation pad ASSY
Feed the document while separating the document set in the
document tray into single sheets.
Document feed roller Feed the document to the CIS unit.
Document scanning position
actuator
Detect the front edge of the document, and adjust the surface
reading position.
Detect the document jam inside the ADF.
Document ejection roller Eject the document on the document cover after the surface has
been read.

Brother FAX-2840 Specifications

General

Group dial	8
Modem speed	33.6 Kbit/s
Color faxing	No
One-touch dials	22
Print technology	Laser
Fax compatibility	ITU-T G3
Fax coding methods	JBIG, MH, MMR (Fax coding method), MR
Fax resolution modes	Fine, Photo, Standard, Super Fine
Fax transmission speed	2.5 sec/page
Out-of-paper reception	400 pages
Error Correction Mode (ECM)	Yes
Fax speed dialing (max numbers)	200
Copier resize	25 - 400 %
Grayscale levels	256
Maximum copy resolution	300 x 600 DPI
Maximum number of copies	99 copies
N-in-1 copy function (N=)	2, 4
Copy speed (black, normal quality, A4)	20 cpm
Standard input capacity	250 sheets
Standard output capacity	100 sheets
Auto document feeder (ADF) input capacity	20 sheets
Supported media weight(s)	60 - 105 g/m²
Maximum standard media size	A4
ISO A-series sizes (A0...A9)	A4, A5, A6
Display number of lines	2 lines
Display number of characters	16
Processor family	ARM9
Processor frequency	200 MHz
Maximum internal memory	16 MB
Product color	Black, Grey
Sustainability certificates	ENERGY STAR
Noise level	53 dB
Noise level (idle)	30 dB
AC input voltage	220-240 V
AC input frequency	50 - 60 Hz
Power consumption (standby)	55 W
Power consumption (typical)	365 W
Power consumption (PowerSave)	1.5 W
Package weight	12900 g

Weight and Dimensions

Weight	9000 g
Dimensions (WxDxH)	368 x 360 x 311 mm